/* ================================================================
   DARKFIELD — Frontier AI Lab
   Built on Linox Design System tokens. Cool-neutral canvas + orange accent.
   ================================================================ */

:root {
  /* Accent — overridden by Tweaks
     Shifted from #ff6b00 (hue 25°, perceptually red-orange) to a clearer
     orange (hue ~33°) — reads as orange, not red, on a near-white canvas. */
  --df-accent:        #ff8c00;   /* DarkOrange — clearly orange, not red-leaning */
  --df-accent-strong: #e67900;   /* darker for hover / pressed */
  --df-accent-soft:   rgba(255, 140, 0, 0.13);
  --df-accent-glow:   0 15px 35px rgba(255, 140, 0, 0.30);

  /* Dark canvas — near-black, cool-neutral */
  --df-bg:        #0a0a0a;
  --df-bg-elev:   #141414;
  --df-bg-card:   #181818;
  --df-bg-inset:  #0d0d0d;
  --df-bg-rule:   #202020;

  /* Foreground — cool near-white, neutral greys (Linear/Stripe-style) */
  --df-fg:        #fafafa;     /* cool near-white */
  --df-fg-muted:  #a3a3a3;     /* neutral grey */
  --df-fg-dim:    #737373;
  --df-fg-faint:  #404040;

  --df-border:        #1f1f1f;
  --df-border-strong: #2d2d2d;
  --df-border-active: var(--df-accent);

  --df-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --df-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --df-ease: cubic-bezier(0.2, 0, 0.38, 0.9);
  --df-fast: 110ms var(--df-ease);
  --df-norm: 240ms var(--df-ease);
  --df-slow: 400ms var(--df-ease);

  /* Density */
  --df-section-y: 128px;
  --df-card-pad: 32px;
  --df-stack: 24px;

  --df-max: 1280px;
  --df-edge: 48px;
}

[data-theme="light"] {
  --df-bg:        #ffffff;     /* pure white — no warmth, no off-tone */
  --df-bg-elev:   #f7f7f7;     /* very subtle grey for chips / elevated chrome */
  --df-bg-card:   #ffffff;     /* cards stay white; borders define them */
  --df-bg-inset:  #f0f0f0;     /* deeper recess for inputs / insets */
  --df-bg-rule:   #e5e5e5;
  --df-fg:        #171717;     /* cool near-black */
  --df-fg-muted:  #525252;     /* neutral grey */
  --df-fg-dim:    #737373;
  --df-fg-faint:  #a3a3a3;
  --df-border:        #e5e5e5;
  --df-border-strong: #d4d4d4;
}

[data-density="compact"] {
  --df-section-y: 88px;
  --df-card-pad: 24px;
  --df-stack: 16px;
}

* , *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--df-sans);
  background: var(--df-bg);
  color: var(--df-fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";
  line-height: 1.5;
  overflow-x: hidden;
  padding-top: 64px;
  transition: background-color 200ms ease, color 200ms ease;
}

@media (prefers-reduced-motion: reduce) {
  body { transition: none; }
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* =================== Layout primitives =================== */
.df-container { max-width: var(--df-max); margin: 0 auto; padding: 0 var(--df-edge); }
.df-section { padding: var(--df-section-y) 0; position: relative; }

.df-rule { height: 1px; background: var(--df-border); width: 100%; }

/* =================== Typography =================== */
.df-tag {
  font-family: var(--df-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--df-accent);
}
.df-tag-muted {
  font-family: var(--df-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--df-fg-dim);
}
.df-display {
  font-family: var(--df-sans);
  font-size: clamp(48px, 6.4vw, 84px);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0;
  color: var(--df-fg);
  text-wrap: balance;
}
.df-display em {
  font-style: normal;
  font-weight: 400;
  color: var(--df-fg-muted);
}
.df-display .accent { color: var(--df-accent); font-weight: 400; }
.df-h1 {
  font-size: clamp(40px, 4.5vw, 60px);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}
.df-h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0;
}
.df-h3 {
  font-size: 22px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0;
}
.df-lead {
  font-size: clamp(18px, 1.4vw, 22px);
  line-height: 1.55;
  color: var(--df-fg-muted);
  font-weight: 300;
  margin: 0;
  max-width: 60ch;
  text-wrap: pretty;
}
.df-body {
  font-size: 16px;
  line-height: 1.6;
  color: var(--df-fg-muted);
  text-wrap: pretty;
}
.df-mono {
  font-family: var(--df-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
}

/* =================== Nav =================== */
.df-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  border-bottom: 1px solid var(--df-border);
  height: 64px;
  display: flex; align-items: center;
  overflow: visible;
}
.df-nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--df-bg) 92%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  pointer-events: none;
  z-index: -1;
}
.df-nav .df-container {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
}
.df-logo {
  font-family: var(--df-sans);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--df-fg);
}
.df-logo .dot { color: var(--df-accent); }
.df-nav-links { display: flex; gap: 4px; align-items: center; }
.df-nav-links > a,
.df-nav-links > .df-nav-item > .df-nav-trigger {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 14px;
  font-family: var(--df-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--df-fg-muted);
  transition: color var(--df-fast), background var(--df-fast);
  border-radius: 0;
  white-space: nowrap;
}
.df-nav-links > a:hover,
.df-nav-links > .df-nav-item:hover > .df-nav-trigger {
  color: var(--df-bg);
  background: var(--df-fg);
}
.df-nav-links > a:focus-visible,
.df-nav-links > .df-nav-item > .df-nav-trigger:focus-visible {
  outline: 2px solid var(--df-accent);
  outline-offset: 2px;
}

/* Theme toggle — explicit button reset so it shows up on every page background */
.df-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  margin: 0 8px 0 0;
  border: 1px solid var(--df-border-strong);
  background: transparent;
  cursor: pointer;
  border-radius: 4px;
  color: var(--df-fg);
  transition: all var(--df-fast);
  flex-shrink: 0;
  -webkit-appearance: none;
  appearance: none;
  font: inherit;
  line-height: 1;
}
.df-theme-toggle:hover {
  color: var(--df-accent);
  border-color: var(--df-accent);
  background: var(--df-accent-soft);
}
.df-theme-toggle:focus-visible {
  outline: 2px solid var(--df-accent);
  outline-offset: 2px;
}
.df-theme-toggle svg {
  width: 16px;
  height: 16px;
  display: block;
  pointer-events: none;
}

/* =================== Buttons =================== */
.df-btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 500;
  padding: 10px 18px;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: all var(--df-norm);
  letter-spacing: 0.005em;
  font-family: var(--df-sans);
}
.df-btn .arrow { transition: transform var(--df-norm); display: inline-block; }
.df-btn:hover .arrow { transform: translateX(4px); }

.df-btn-primary { background: var(--df-fg); color: var(--df-bg); }
.df-btn-primary:hover { background: var(--df-accent); color: #fff; }

.df-btn-accent { background: var(--df-accent); color: #fff; }
.df-btn-accent:hover { background: var(--df-accent-strong); }

.df-btn-ghost {
  background: transparent; color: var(--df-fg);
  border-color: var(--df-border-strong);
}
.df-btn-ghost:hover { border-color: var(--df-fg); background: var(--df-bg-elev); }

.df-btn-link {
  padding: 0; background: none; color: var(--df-accent);
  font-family: var(--df-mono); font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.12em;
}
.df-btn-link:hover { color: var(--df-accent-strong); }

/* =================== Section headers =================== */
.df-section-head { margin-bottom: 64px; max-width: 720px; }
.df-section-head .df-tag { display: inline-block; margin-bottom: 20px; }
.df-section-head .df-h1 { margin-bottom: 20px; }

/* =================== Grain overlay =================== */
.df-grain {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: 0.06;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.6 0'/></filter><rect width='200' height='200' filter='url(%23n)'/></svg>");
}
[data-grain="off"] .df-grain { display: none; }

/* All content sits above grain.
   .df-nav is excluded — it has its own positioning (fixed / sticky, z-index 100)
   defined above. Including it here would override that with z-index 2 and
   collapse dropdowns under main's content. */
main, footer { position: relative; z-index: 2; }

/* =================== Footer =================== */
.df-footer {
  border-top: 1px solid var(--df-border);
  padding: 64px 0 32px;
  background: var(--df-bg);
  margin-top: 64px;
}
.df-footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  padding-bottom: 48px; border-bottom: 1px solid var(--df-border);
}
.df-footer h5 {
  font-family: var(--df-mono);
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--df-fg-dim); margin: 0 0 18px; font-weight: 600;
}
.df-footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.df-footer ul a { color: var(--df-fg-muted); font-size: 14px; transition: color var(--df-fast); }
.df-footer ul a:hover { color: var(--df-fg); }
.df-footer-bottom {
  padding-top: 24px;
  display: flex; justify-content: space-between;
  color: var(--df-fg-dim); font-size: 12px; font-family: var(--df-mono);
  letter-spacing: 0.04em;
}
.df-footer .df-logo { font-size: 18px; }
.df-footer-blurb { color: var(--df-fg-muted); font-size: 14px; line-height: 1.6; max-width: 280px; margin-top: 16px; }

/* =================== Hero =================== */
.df-hero {
  padding-top: 96px;
  padding-bottom: 64px;
  position: relative;
  overflow: hidden;
}
.df-hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 80px;
  align-items: center;
}
.df-hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 28px;
  padding: 6px 12px;
  border: 1px solid var(--df-border-strong);
  border-radius: 80px;
  font-family: var(--df-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--df-fg-muted);
}
.df-hero-eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--df-accent);
  box-shadow: 0 0 0 0 var(--df-accent);
  animation: df-pulse 2s var(--df-ease) infinite;
}
@keyframes df-pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--df-accent) 60%, transparent); }
  70%  { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
.df-hero-actions { display: flex; gap: 12px; margin-top: 36px; }
.df-hero-meta {
  margin-top: 56px;
  display: flex; gap: 36px;
  font-family: var(--df-mono); font-size: 11px;
  color: var(--df-fg-dim); text-transform: uppercase; letter-spacing: 0.12em;
}
.df-hero-meta span { display: flex; align-items: baseline; gap: 8px; }
.df-hero-meta .num {
  color: var(--df-fg); font-size: 13px; font-weight: 600;
  letter-spacing: -0.01em; text-transform: none;
}

/* =================== Walkthrough (animated terminal) =================== */
.df-walk {
  background: var(--df-bg-elev);
  border: 1px solid var(--df-border);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.02) inset;
  position: relative;
  font-family: var(--df-mono);
  font-size: 13px;
  max-width: 100%;
  min-width: 0;
}
.df-walk-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--df-border);
  background: var(--df-bg-inset);
}
.df-walk-head-left { display: flex; align-items: center; gap: 10px; color: var(--df-fg-dim); font-size: 11px; letter-spacing: 0.06em; }
.df-walk-dots { display: flex; gap: 6px; }
.df-walk-dots span { width: 9px; height: 9px; border-radius: 50%; background: var(--df-border-strong); }
.df-walk-status {
  display: flex; align-items: center; gap: 6px;
  font-size: 10px; color: var(--df-fg-dim); letter-spacing: 0.12em; text-transform: uppercase;
}
.df-walk-status .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--df-accent); }

.df-walk-body {
  padding: 20px 22px;
  height: 620px;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 10px;
}
.df-walk-line { display: flex; gap: 10px; align-items: flex-start; opacity: 0; transform: translateY(6px); transition: opacity 320ms var(--df-ease), transform 320ms var(--df-ease); }
.df-walk-line.show { opacity: 1; transform: translateY(0); }
.df-walk-line .gut { color: var(--df-fg-faint); width: 14px; flex-shrink: 0; user-select: none; }
.df-walk-line .lbl { color: var(--df-accent); font-weight: 600; }
.df-walk-line .muted { color: var(--df-fg-dim); }
.df-walk-line .ok { color: #6ddc8a; }
.df-walk-line .warn { color: #eab308; }
.df-walk-line.user { color: var(--df-fg); }
.df-walk-line .text { color: var(--df-fg); flex: 1 1 0; min-width: 0; word-break: break-word; overflow-wrap: anywhere; }
.df-walk-line .text .em { color: var(--df-accent); }

.df-walk-prompt {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 10px 12px;
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border-strong);
  border-radius: 4px;
  margin-top: 4px;
  overflow: hidden;
  max-width: 100%;
  min-width: 0;
}
.df-walk-prompt .caret { color: var(--df-accent); flex-shrink: 0; line-height: 1.55; }
.df-walk-prompt .typed {
  color: var(--df-fg);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  flex: 1 1 0;
  min-width: 0;
  line-height: 1.55;
}
.df-walk-prompt .blink {
  display: inline-block; width: 7px; height: 14px; background: var(--df-fg);
  vertical-align: middle; margin-left: 2px;
  animation: df-blink 1s steps(2) infinite;
}
@keyframes df-blink { 50% { opacity: 0; } }

.df-walk-think {
  display: flex; flex-direction: column; gap: 4px;
  padding: 10px 12px;
  background: rgba(255, 140, 0, 0.06);
  border-left: 2px solid var(--df-accent);
  margin: 4px 0;
  font-size: 12px;
}
.df-walk-think .head { color: var(--df-accent); font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; font-size: 10px; }
.df-walk-think .step { color: var(--df-fg-muted); display: flex; gap: 8px; }
.df-walk-think .step::before { content: "›"; color: var(--df-fg-dim); }

/* Output table block */
.df-walk-table {
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border);
  border-radius: 4px;
  margin-top: 6px;
  overflow: hidden;
}
.df-walk-table .thd {
  display: grid; grid-template-columns: 1.2fr 0.8fr 1.1fr 1fr 0.7fr;
  padding: 8px 12px;
  background: var(--df-bg-elev);
  border-bottom: 1px solid var(--df-border);
  font-size: 10px;
  color: var(--df-fg-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.df-walk-table .row {
  display: grid; grid-template-columns: 1.2fr 0.8fr 1.1fr 1fr 0.7fr;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--df-fg);
  border-bottom: 1px solid var(--df-border);
  opacity: 0; transform: translateY(4px);
  transition: opacity 240ms var(--df-ease), transform 240ms var(--df-ease);
}
.df-walk-table .row.show { opacity: 1; transform: translateY(0); }
.df-walk-table .row:last-child { border-bottom: none; }
.df-walk-table .row .mn { color: var(--df-fg-muted); font-size: 11px; }
.df-walk-table .row .pill {
  display: inline-block; padding: 1px 6px; border-radius: 2px;
  background: var(--df-accent-soft); color: var(--df-accent);
  font-size: 10px; letter-spacing: 0.04em;
}
.df-walk-table .row .link { color: var(--df-accent); text-decoration: underline; text-underline-offset: 2px; }

.df-walk-progress {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border-strong);
  border-radius: 4px;
}
.df-walk-progress .bar {
  flex: 1; height: 4px; background: var(--df-bg-rule);
  border-radius: 999px; overflow: hidden;
}
.df-walk-progress .bar > i {
  display: block; height: 100%; width: 0%;
  background: var(--df-accent);
  transition: width 320ms var(--df-ease);
}
.df-walk-progress .pct { color: var(--df-fg-muted); font-size: 11px; min-width: 36px; text-align: right; }

.df-walk-rerun {
  position: absolute; right: 14px; bottom: 14px;
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px;
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border-strong);
  color: var(--df-fg-muted);
  font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase;
  border-radius: 2px;
  transition: all var(--df-norm);
}
.df-walk-rerun:hover { color: var(--df-fg); border-color: var(--df-fg); }

/* =================== Hero variant B =================== */
.df-hero-b {
  padding-top: 120px;
  padding-bottom: 80px;
  text-align: left;
}
.df-hero-b .df-display { max-width: 16ch; }
.df-hero-b-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 64px;
}
.df-hero-b-bottom {
  display: grid; grid-template-columns: 1.5fr 1fr; gap: 80px;
  align-items: end;
}
.df-hero-b-side {
  display: flex; flex-direction: column; gap: 16px;
  padding-bottom: 8px;
}
.df-hero-b-side .label {
  font-family: var(--df-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--df-fg-dim);
}
.df-hero-b-side .text {
  font-size: 16px; line-height: 1.55; color: var(--df-fg-muted);
}

.df-hero-b-strip {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--df-border);
  border-bottom: 1px solid var(--df-border);
  margin-top: 80px;
}
.df-hero-b-strip > div {
  padding: 28px 24px;
  border-right: 1px solid var(--df-border);
}
.df-hero-b-strip > div:last-child { border-right: none; }
.df-hero-b-strip .num {
  font-size: 36px; font-weight: 300; line-height: 1; color: var(--df-fg);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.df-hero-b-strip .lbl {
  font-family: var(--df-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--df-fg-dim);
}

/* Ambient detection grid behind hero-b */
.df-hero-b-canvas {
  position: absolute; inset: 0; opacity: 0.4;
  pointer-events: none;
  background-image:
    linear-gradient(var(--df-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--df-border) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

/* =================== Features =================== */
.df-features { background: var(--df-bg); }
.df-features-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1px;
  background: var(--df-border);
  border: 1px solid var(--df-border);
}
.df-feature {
  background: var(--df-bg-card);
  padding: var(--df-card-pad);
  display: flex; flex-direction: column;
  position: relative;
  min-height: 320px;
  transition: background var(--df-norm);
}
.df-feature:hover { background: var(--df-bg-elev); }
.df-feature.span-6 { grid-column: span 6; }
.df-feature.span-4 { grid-column: span 4; }
.df-feature.span-8 { grid-column: span 8; }

.df-feature .index {
  font-family: var(--df-mono); font-size: 11px;
  color: var(--df-fg-dim); letter-spacing: 0.12em;
  margin-bottom: 24px;
}
.df-feature h3 {
  font-size: 24px; font-weight: 300; line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--df-fg);
  margin: 0 0 12px;
}
.df-feature h3 .accent { color: var(--df-accent); }
.df-feature p {
  font-size: 14px; line-height: 1.55; color: var(--df-fg-muted);
  margin: 0; max-width: 50ch;
}
.df-feature .vis {
  margin-top: auto;
  padding-top: 24px;
}

/* CCTV preview frame */
.df-cctv {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border: 1px solid var(--df-border-strong);
  overflow: hidden;
  font-family: var(--df-mono);
}
.df-cctv img {
  width: 100%; height: 100%; object-fit: cover;
  filter: contrast(1.05) saturate(0.85) brightness(0.9);
}
.df-cctv::before {
  /* scanlines */
  content: ""; position: absolute; inset: 0;
  background: repeating-linear-gradient(
    0deg, rgba(0,0,0,0.06), rgba(0,0,0,0.06) 1px, transparent 1px, transparent 3px
  );
  pointer-events: none;
}
.df-cctv-hud {
  position: absolute; inset: 0;
  pointer-events: none;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: 8px 10px;
  font-size: 9px; color: rgba(245, 243, 238, 0.85);
  letter-spacing: 0.08em; text-transform: uppercase;
}
.df-cctv-hud .row { display: flex; justify-content: space-between; }
.df-cctv-hud .rec { display: flex; align-items: center; gap: 4px; color: var(--df-accent); }
.df-cctv-hud .rec::before {
  content: ""; display: inline-block; width: 6px; height: 6px;
  background: var(--df-accent); border-radius: 50%;
  animation: df-blink 1.4s infinite;
}

/* Bounding box overlay */
.df-bbox {
  position: absolute;
  border: 1.5px solid var(--df-accent);
  font-family: var(--df-mono);
  font-size: 9px;
  letter-spacing: 0.04em;
}
.df-bbox::before {
  content: attr(data-label);
  position: absolute; left: -1.5px; top: -16px;
  background: var(--df-accent);
  color: #fff;
  padding: 1px 5px;
  white-space: nowrap;
  font-weight: 600;
}
.df-bbox.alt { border-color: #6ddc8a; }
.df-bbox.alt::before { background: #6ddc8a; color: #000; }
.df-bbox.muted { border-color: rgba(245, 243, 238, 0.7); }
.df-bbox.muted::before { background: rgba(245, 243, 238, 0.9); color: #000; }

.df-bbox.dashed { border-style: dashed; }

/* Zone polygon */
.df-zone {
  position: absolute;
  background: rgba(255, 140, 0, 0.16);
  border: 1.5px dashed var(--df-accent);
}
.df-zone::after {
  content: attr(data-label);
  position: absolute; bottom: 4px; left: 4px;
  font-family: var(--df-mono); font-size: 9px;
  background: var(--df-accent); color: #fff;
  padding: 1px 4px; letter-spacing: 0.06em; text-transform: uppercase;
}

/* OCR readout */
.df-ocr-bubble {
  position: absolute;
  font-family: var(--df-mono); font-size: 10px;
  background: var(--df-bg-inset);
  border: 1px solid var(--df-accent);
  color: var(--df-fg);
  padding: 3px 6px;
  letter-spacing: 0.04em;
}
.df-ocr-bubble::before {
  content: ""; position: absolute;
  width: 1px; background: var(--df-accent);
}

/* Counter chip */
.df-count-chip {
  position: absolute;
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px;
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border-strong);
  font-family: var(--df-mono); font-size: 11px; color: var(--df-fg);
  letter-spacing: 0.04em;
}
.df-count-chip .num { color: var(--df-accent); font-weight: 600; font-size: 14px; }

/* Track lines */
.df-track {
  position: absolute; inset: 0;
  pointer-events: none;
}

/* =================== Models =================== */
.df-models { background: var(--df-bg); }
.df-models-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.df-model {
  background: var(--df-bg-card);
  border: 1px solid var(--df-border);
  padding: 40px;
  position: relative;
  display: flex; flex-direction: column;
  min-height: 560px;
  transition: border-color var(--df-norm);
}
.df-model:hover { border-color: var(--df-border-strong); }
.df-model-tag {
  display: inline-flex; gap: 8px; align-items: center;
  font-family: var(--df-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--df-fg-dim);
  margin-bottom: 24px;
}
.df-model-tag .swatch {
  width: 8px; height: 8px; background: var(--df-accent);
}
.df-model h2 {
  font-size: 44px; font-weight: 300; line-height: 1;
  letter-spacing: -0.025em;
  margin: 0 0 8px;
  color: var(--df-fg);
}
.df-model h2 strong { color: var(--df-accent); font-weight: 400; }
.df-model .role {
  font-family: var(--df-mono); font-size: 12px;
  color: var(--df-fg-muted); letter-spacing: 0.04em;
  margin-bottom: 24px;
}
.df-model .summary {
  font-size: 16px; line-height: 1.55; color: var(--df-fg-muted);
  margin: 0 0 32px; max-width: 50ch;
}
.df-model-caps {
  list-style: none; margin: 0; padding: 24px 0 0;
  border-top: 1px solid var(--df-border);
  display: flex; flex-direction: column; gap: 16px;
}
.df-model-caps li {
  display: grid; grid-template-columns: 26px 1fr;
  gap: 12px; align-items: start;
}
.df-model-caps .ix {
  font-family: var(--df-mono); font-size: 10px;
  color: var(--df-fg-dim); letter-spacing: 0.06em;
  padding-top: 4px;
}
.df-model-caps .body { font-size: 14px; color: var(--df-fg); line-height: 1.5; }
.df-model-caps .body small { display: block; color: var(--df-fg-muted); font-size: 13px; margin-top: 2px; }

.df-model-spec {
  margin-top: 32px;
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--df-border);
  padding-top: 24px;
  gap: 16px;
}
.df-model-spec > div .v {
  font-family: var(--df-mono); font-size: 18px;
  color: var(--df-fg); font-weight: 500;
  letter-spacing: -0.01em;
}
.df-model-spec > div .l {
  font-family: var(--df-mono); font-size: 10px;
  color: var(--df-fg-dim); letter-spacing: 0.12em; text-transform: uppercase;
  margin-top: 2px;
}

/* =================== Closing band =================== */
.df-close {
  border-top: 1px solid var(--df-border);
  padding: 96px 0 64px;
  text-align: left;
}
.df-close-grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 80px;
  align-items: end;
}
.df-close-meta {
  display: flex; flex-direction: column; gap: 24px;
  font-family: var(--df-mono); font-size: 12px;
  color: var(--df-fg-muted);
}
.df-close-meta dt { color: var(--df-fg-dim); letter-spacing: 0.12em; text-transform: uppercase; font-size: 10px; margin-bottom: 4px; }
.df-close-meta dd { margin: 0 0 16px 0; color: var(--df-fg); }

/* =================== Why / What's different =================== */
.df-why {
  background: var(--df-bg);
  border-top: 1px solid var(--df-border);
}
.df-why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--df-border);
  border: 1px solid var(--df-border);
  margin-bottom: 64px;
}
.df-why-point {
  background: var(--df-bg-card);
  padding: var(--df-card-pad);
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 360px;
  transition: background var(--df-norm);
}
.df-why-point:hover { background: var(--df-bg-elev); }
.df-why-point .ix {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.df-why-point h3 {
  font-size: 24px;
  font-weight: 300;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--df-fg);
  text-wrap: balance;
}
.df-why-point .old,
.df-why-point .new {
  font-size: 14px;
  line-height: 1.55;
  color: var(--df-fg-muted);
  padding-left: 14px;
  border-left: 2px solid var(--df-border-strong);
}
.df-why-point .new {
  color: var(--df-fg);
  border-left-color: var(--df-accent);
}
.df-why-point .lbl {
  display: block;
  font-family: var(--df-mono);
  font-size: 10px;
  color: var(--df-fg-dim);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.df-why-point .new .lbl { color: var(--df-accent); }

/* Banner image */
.df-why-banner {
  position: relative;
  border: 1px solid var(--df-border);
  overflow: hidden;
  aspect-ratio: 21 / 9;
  background: #000;
}
.df-why-banner img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: contrast(1.04) saturate(0.85) brightness(0.7);
}
.df-why-banner::before {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(
    0deg, rgba(0,0,0,0.05), rgba(0,0,0,0.05) 1px, transparent 1px, transparent 4px
  );
  pointer-events: none;
  z-index: 1;
}
.df-why-banner::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10,10,10,0.85) 100%);
  pointer-events: none;
  z-index: 1;
}
.df-why-banner-meta {
  position: absolute;
  left: 36px; right: 36px; bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 2;
}
.df-why-banner-meta .lbl {
  font-family: var(--df-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(245, 243, 238, 0.65);
}
.df-why-banner-meta .text {
  font-family: var(--df-sans);
  font-size: clamp(20px, 2vw, 30px);
  font-weight: 300;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: rgba(245, 243, 238, 0.96);
  text-wrap: balance;
}

/* =================== Use cases / Deployments =================== */
.df-usecases {
  background: var(--df-bg);
  border-top: 1px solid var(--df-border);
}
.df-usecases-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.df-usecase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: stretch;
  background: var(--df-bg-card);
  border: 1px solid var(--df-border);
  border-bottom: none;
  overflow: hidden;
  transition: background var(--df-norm);
}
.df-usecase:last-child { border-bottom: 1px solid var(--df-border); }
.df-usecase:hover { background: var(--df-bg-elev); }

.df-usecase.reverse .df-usecase-vis { order: 2; border-right: none; border-left: 1px solid var(--df-border); }
.df-usecase.reverse .df-usecase-content { order: 1; }

/* Editorial image side */
.df-usecase-vis {
  position: relative;
  background: #000;
  border-right: 1px solid var(--df-border);
  overflow: hidden;
  min-height: 460px;
}
.df-usecase-vis img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: contrast(1.04) saturate(0.85) brightness(0.78);
}
.df-usecase-vis::before {
  /* faint scanlines, much subtler than the cctv card */
  content: ""; position: absolute; inset: 0;
  background: repeating-linear-gradient(
    0deg, rgba(0,0,0,0.05), rgba(0,0,0,0.05) 1px, transparent 1px, transparent 4px
  );
  pointer-events: none; z-index: 1;
}
.df-usecase-vis::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,10,10,0.0) 50%, rgba(10,10,10,0.55) 100%);
  pointer-events: none; z-index: 1;
}
.df-usecase-vis-hud {
  position: absolute; left: 14px; bottom: 12px; z-index: 2;
  display: flex; align-items: center; gap: 8px;
  font-family: var(--df-mono); font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: rgba(245, 243, 238, 0.9);
}
.df-usecase-vis-hud .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--df-accent);
  animation: df-blink 1.4s infinite;
}

/* Content side */
.df-usecase-content {
  padding: 56px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.df-usecase-tag {
  font-family: var(--df-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--df-fg-dim);
}
.df-usecase-prompt {
  margin: 0;
  display: flex; align-items: flex-start; gap: 12px;
  padding: 6px 0 6px 18px;
  border-left: 2px solid var(--df-accent);
  font-family: var(--df-sans);
  font-size: clamp(20px, 1.7vw, 26px);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--df-fg);
  text-wrap: balance;
}
.df-usecase-prompt .caret {
  color: var(--df-accent);
  font-family: var(--df-mono);
  font-size: 18px;
  margin-top: 2px;
  flex-shrink: 0;
}

/* Schema mini-table */
.df-usecase-schema {
  margin-top: auto;
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border);
  font-family: var(--df-mono);
  font-size: 12px;
  overflow: hidden;
}
.df-usecase-schema .hd {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 14px;
  border-bottom: 1px solid var(--df-border);
  background: var(--df-bg-elev);
  font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--df-fg-dim);
}
.df-usecase-schema .hd .live {
  display: flex; align-items: center; gap: 6px;
  color: var(--df-accent);
}
.df-usecase-schema .hd .live .dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--df-accent);
  animation: df-blink 1.4s infinite;
}
.df-usecase-schema .row {
  display: grid;
  padding: 9px 14px;
  border-bottom: 1px solid var(--df-border);
  align-items: baseline;
}
.df-usecase-schema .row:last-child { border-bottom: none; }
.df-usecase-schema .row.hdr {
  font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--df-fg-dim);
  background: var(--df-bg-card);
}
.df-usecase-schema .row span {
  color: var(--df-fg);
  padding-right: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.df-usecase-schema .row .mn { color: var(--df-fg-muted); }
.df-usecase-schema .row.continued span {
  color: var(--df-fg-faint);
  letter-spacing: 0.1em;
}

.df-usecase-foot {
  font-family: var(--df-mono); font-size: 11px;
  color: var(--df-fg-dim);
  line-height: 1.55;
  letter-spacing: 0.02em;
  border-top: 1px solid var(--df-border);
  padding-top: 16px;
}

/* =================== Request access modal =================== */
.df-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(10, 10, 10, 0.78);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: df-modal-fade 200ms var(--df-ease);
}
@keyframes df-modal-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.df-modal-card {
  position: relative;
  background: var(--df-bg-card);
  border: 1px solid var(--df-border-strong);
  border-radius: 4px;
  width: 100%;
  max-width: 580px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 40px 40px 32px;
  outline: none;
  animation: df-modal-rise 240ms var(--df-ease);
  box-shadow: 0 30px 80px rgba(0,0,0,0.6);
}
@keyframes df-modal-rise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.df-modal-x {
  position: absolute;
  top: 14px; right: 14px;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  color: var(--df-fg-dim);
  font-size: 14px;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: all var(--df-fast);
}
.df-modal-x:hover {
  border-color: var(--df-border-strong);
  color: var(--df-fg);
  background: var(--df-bg-inset);
}

.df-modal-head { margin-bottom: 28px; }
.df-modal-head .df-tag { display: inline-block; }
.df-modal-title {
  font-size: 28px;
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 14px 0 12px;
  color: var(--df-fg);
  text-wrap: balance;
}
.df-modal-sub {
  font-size: 14px;
  line-height: 1.55;
  color: var(--df-fg-muted);
  margin: 0;
  max-width: 50ch;
}

.df-modal-form {
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.df-modal-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.df-modal-field > label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--df-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--df-fg-dim);
}
.df-modal-field > label .ix {
  color: var(--df-accent);
  font-weight: 600;
}
.df-modal-field > label .ttl { color: var(--df-fg); }

.df-modal-field input[type="text"],
.df-modal-field input[type="email"],
.df-modal-field textarea {
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border-strong);
  color: var(--df-fg);
  padding: 10px 12px;
  font-family: var(--df-sans);
  font-size: 14px;
  line-height: 1.5;
  border-radius: 2px;
  resize: vertical;
  transition: border-color var(--df-fast), background var(--df-fast);
  width: 100%;
}
.df-modal-field input:focus,
.df-modal-field textarea:focus {
  outline: none;
  border-color: var(--df-accent);
  background: var(--df-bg-elev);
}
.df-modal-field input::placeholder,
.df-modal-field textarea::placeholder {
  color: var(--df-fg-dim);
  font-family: var(--df-sans);
}

.df-modal-field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.df-modal-check {
  display: flex !important;
  align-items: center !important;
  gap: 10px !important;
  margin-top: 4px;
  text-transform: none !important;
  letter-spacing: 0 !important;
  font-family: var(--df-sans) !important;
  font-size: 12px !important;
  color: var(--df-fg-muted) !important;
  cursor: pointer;
}
.df-modal-check input {
  width: 14px; height: 14px;
  accent-color: var(--df-accent);
  margin: 0;
}

.df-modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 4px;
  border-top: 1px solid var(--df-border);
  padding-top: 24px;
}

/* Success state */
.df-modal-success { display: flex; flex-direction: column; gap: 18px; }
.df-modal-success .df-tag { display: inline-block; }

.df-modal-receipt {
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border);
  border-radius: 2px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: var(--df-mono);
  font-size: 12px;
  margin-top: 8px;
}
.df-modal-receipt .row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--df-border);
}
.df-modal-receipt .row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.df-modal-receipt .lbl {
  color: var(--df-fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 10px;
}
.df-modal-receipt .val {
  color: var(--df-fg);
  font-family: var(--df-sans);
  font-size: 13px;
  line-height: 1.5;
  word-break: break-word;
}
.df-modal-receipt .pill {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 6px;
  background: var(--df-accent-soft);
  color: var(--df-accent);
  font-family: var(--df-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  border-radius: 2px;
}

@media (max-width: 640px) {
  .df-modal-card { padding: 32px 24px 24px; }
  .df-modal-field-row { grid-template-columns: 1fr; gap: 16px; }
  .df-modal-receipt .row { grid-template-columns: 70px 1fr; }
}

/* =================== Lifecycle timeline =================== */
.df-timeline-rail {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.df-timeline-axis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  position: relative;
  padding: 0 0 36px;
}
/* horizontal track between the centers of the first and last dot */
.df-timeline-axis::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 12.5%;
  right: 12.5%;
  height: 1px;
  background: linear-gradient(90deg, var(--df-border-strong) 0%, var(--df-border-strong) 30%, var(--df-accent) 100%);
  z-index: 0;
}
.df-timeline-axis .cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  position: relative;
  z-index: 1;
}
.df-timeline-axis .hour {
  font-family: var(--df-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--df-fg-dim);
}
.df-timeline-axis .dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--df-bg);
  border: 1px solid var(--df-border-strong);
  box-shadow: 0 0 0 4px var(--df-bg);
}
.df-timeline-axis .dot.accent {
  background: var(--df-accent);
  border-color: var(--df-accent);
  box-shadow: 0 0 0 4px var(--df-bg), 0 0 0 8px var(--df-accent-soft);
}
.df-timeline-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--df-border);
  border: 1px solid var(--df-border);
}
.df-timeline-card {
  background: var(--df-bg-card);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 240px;
  transition: background var(--df-norm);
}
.df-timeline-card:hover { background: var(--df-bg-elev); }
.df-timeline-card h3 {
  font-size: 20px;
  font-weight: 300;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--df-fg);
}
.df-timeline-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--df-fg-muted);
  margin: 0;
}
.df-timeline-card p code {
  font-family: var(--df-mono);
  font-size: 12px;
  color: var(--df-accent);
  background: var(--df-bg-inset);
  padding: 0 6px;
  border-radius: 2px;
  letter-spacing: 0.02em;
}
.df-timeline-card .metric {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--df-border);
  font-family: var(--df-mono);
  font-size: 12px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.df-timeline-card .metric .lbl {
  color: var(--df-fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 10px;
}
.df-timeline-card .metric .val {
  color: var(--df-fg);
  font-weight: 500;
}
.df-timeline-card .metric .val.accent {
  color: var(--df-accent);
}
.df-timeline-foot {
  margin-top: 36px;
  color: var(--df-fg-dim);
  text-align: right;
}
.df-timeline-foot a {
  color: var(--df-fg-muted);
  border-bottom: 1px solid var(--df-border-strong);
  transition: color var(--df-fast), border-color var(--df-fast);
}
.df-timeline-foot a:hover {
  color: var(--df-accent);
  border-bottom-color: var(--df-accent);
}

/* =================== FAQ =================== */
.df-faq-list {
  border-top: 1px solid var(--df-border);
}
.df-faq-list details {
  border-bottom: 1px solid var(--df-border);
}
.df-faq-list summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 60px 1fr 32px;
  gap: 24px;
  padding: 24px 8px;
  align-items: center;
  transition: background var(--df-fast);
}
.df-faq-list summary::-webkit-details-marker { display: none; }
.df-faq-list summary::marker { display: none; content: ""; }
.df-faq-list summary:hover { background: var(--df-bg-elev); }
.df-faq-list summary .ix {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.df-faq-list summary .q {
  font-family: var(--df-sans);
  font-size: 18px;
  font-weight: 400;
  color: var(--df-fg);
  letter-spacing: -0.005em;
  line-height: 1.4;
  text-wrap: balance;
}
.df-faq-list summary .caret {
  font-family: var(--df-mono);
  font-size: 22px;
  color: var(--df-fg-dim);
  font-weight: 300;
  text-align: center;
  transition: transform var(--df-norm), color var(--df-fast);
  display: inline-block;
  line-height: 1;
}
.df-faq-list details[open] summary .caret {
  transform: rotate(45deg);
  color: var(--df-accent);
}
.df-faq-list details[open] summary .q { color: var(--df-fg); }
.df-faq-list summary:hover .q { color: var(--df-accent); }
.df-faq-list .a {
  padding: 4px 32px 28px 92px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--df-fg-muted);
  max-width: 80ch;
}
.df-faq-list .a code {
  font-family: var(--df-mono);
  font-size: 13px;
  color: var(--df-fg);
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border);
  padding: 1px 6px;
  border-radius: 2px;
}
.df-faq-list .a a {
  color: var(--df-accent);
  border-bottom: 1px solid var(--df-accent-soft);
  transition: border-color var(--df-fast);
}
.df-faq-list .a a:hover { border-bottom-color: var(--df-accent); }

/* =================== Subpages: shared page hero =================== */
.df-page-hero {
  padding-top: 96px;
  padding-bottom: 80px;
}
.df-page-hero-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 96px;
  align-items: end;
}
.df-page-hero-meta {
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-family: var(--df-mono);
  font-size: 12px;
  color: var(--df-fg-muted);
  border-top: 1px solid var(--df-border);
  padding-top: 24px;
}
.df-page-hero-meta > div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  align-items: baseline;
}
.df-page-hero-meta .lbl {
  color: var(--df-fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 10px;
}
.df-page-hero-meta .val { color: var(--df-fg); }

/* Active nav indicator (subpages) */
.df-nav-links a.active {
  color: var(--df-fg);
  position: relative;
}
.df-nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -10px;
  height: 1px;
  background: var(--df-accent);
}

/* =================== Research page: cards + papers =================== */
.df-research-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--df-border);
  border: 1px solid var(--df-border);
}
.df-research-card {
  background: var(--df-bg-card);
  padding: var(--df-card-pad);
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 280px;
  transition: background var(--df-norm);
}
.df-research-card:hover { background: var(--df-bg-elev); }
.df-research-card-wide { grid-column: span 2; }
.df-research-card .ix {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.df-research-card h3 {
  font-size: 24px;
  font-weight: 300;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--df-fg);
  text-wrap: balance;
}
.df-research-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--df-fg-muted);
  margin: 0;
  max-width: 60ch;
}
.df-research-card p em { color: var(--df-fg); font-style: normal; }
.df-research-card .meta {
  margin-top: auto;
  display: flex;
  gap: 24px;
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.06em;
  padding-top: 14px;
  border-top: 1px solid var(--df-border);
}

/* Papers list */
.df-papers {
  list-style: none;
  margin: 0; padding: 0;
  border-top: 1px solid var(--df-border);
}
.df-paper {
  padding: 32px 0;
  border-bottom: 1px solid var(--df-border);
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  align-items: start;
}
.df-paper-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--df-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.df-paper-meta .venue {
  color: var(--df-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
}
.df-paper-meta .cat {
  color: var(--df-fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.df-paper-meta .length {
  color: var(--df-fg-dim);
  margin-top: 4px;
}
.df-paper-body h3 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--df-fg);
  text-wrap: balance;
}
.df-paper-body p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--df-fg-muted);
  margin: 0 0 14px;
  max-width: 70ch;
}
.df-paper-byline {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.04em;
}

/* =================== Careers page: roles list =================== */
.df-roles {
  list-style: none;
  margin: 0; padding: 0;
  border-top: 1px solid var(--df-border);
}
.df-role {
  padding: 32px 0;
  border-bottom: 1px solid var(--df-border);
}
.df-role-head {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 20px;
  align-items: center;
}
.df-role-head .ix {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.12em;
}
.df-role-head .title h3 {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--df-fg);
}
.df-role-head .title .meta {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.06em;
  text-transform: lowercase;
}
.df-role-body {
  margin-top: 24px;
  padding-left: 60px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.df-role-summary {
  font-size: 16px;
  line-height: 1.55;
  color: var(--df-fg);
  margin: 0;
  max-width: 70ch;
  font-weight: 300;
}
.df-role-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--df-border);
}
.df-role-cols h5 {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 14px;
  font-weight: 600;
}
.df-role-cols ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.df-role-cols li {
  font-size: 14px;
  line-height: 1.5;
  color: var(--df-fg-muted);
  padding-left: 18px;
  position: relative;
}
.df-role-cols li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--df-fg-dim);
}

/* =================== Technical brief =================== */
.df-brief-cover {
  padding-top: 96px;
  padding-bottom: 80px;
}
.df-brief-coverhead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--df-border);
  padding-bottom: 18px;
}
.df-brief-toc {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--df-border);
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 48px;
  align-items: start;
}
.df-brief-toc .lbl {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--df-fg-dim);
  margin-top: 4px;
}
.df-brief-toc ol {
  list-style: none;
  margin: 0; padding: 0;
  columns: 2;
  column-gap: 32px;
}
.df-brief-toc li {
  font-family: var(--df-mono);
  font-size: 13px;
  color: var(--df-fg);
  padding: 4px 0;
  break-inside: avoid;
}
.df-brief-toc a {
  color: var(--df-fg-muted);
  transition: color var(--df-fast);
}
.df-brief-toc a:hover { color: var(--df-accent); }

.df-brief-section { padding: 96px 0; }
.df-brief-container {
  max-width: 880px !important;
  position: relative;
}
.df-brief-num {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.df-brief-h {
  margin-bottom: 32px;
  font-size: clamp(32px, 3.5vw, 48px) !important;
}
.df-brief-bullets {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.df-brief-bullets li {
  font-size: 16px;
  line-height: 1.55;
  color: var(--df-fg);
  padding-left: 22px;
  position: relative;
  max-width: 70ch;
}
.df-brief-bullets li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--df-accent);
  font-weight: 400;
}
.df-brief-figcap {
  margin-top: 24px;
  text-align: center;
  color: var(--df-fg-dim);
  letter-spacing: 0.06em;
}
.df-brief-section .df-body {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.65;
  max-width: 70ch;
}
.df-brief-section .df-body code {
  font-family: var(--df-mono);
  font-size: 13px;
  background: var(--df-bg-inset);
  border: 1px solid var(--df-border);
  padding: 1px 6px;
  border-radius: 2px;
  color: var(--df-fg);
}
.df-brief-section .df-body a {
  color: var(--df-accent);
  border-bottom: 1px solid var(--df-accent-soft);
  transition: border-color var(--df-fast);
}
.df-brief-section .df-body a:hover { border-bottom-color: var(--df-accent); }

/* Architecture diagram */
.df-arch {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
}
.df-arch-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  align-items: stretch;
}
.df-arch-row.two {
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--df-border);
  border: 1px solid var(--df-border);
  padding: 0;
}
.df-arch-row.two .pair {
  background: var(--df-bg-card);
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 24px;
}
.df-arch .role {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  align-self: start;
  padding-top: 22px;
}
.df-arch .role.accent { color: var(--df-accent); }
.df-arch .block {
  background: var(--df-bg-card);
  border: 1px solid var(--df-border-strong);
  padding: 20px 24px;
}
.df-arch-row.two .pair .block { border: none; padding: 0; background: transparent; }
.df-arch .block.accent {
  border-color: var(--df-accent);
  background: var(--df-bg-card);
  position: relative;
}
.df-arch .block.accent::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--df-accent);
}
.df-arch .block.accent { padding-left: 24px; }
.df-arch .ttl {
  font-family: var(--df-sans);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--df-fg);
  margin-bottom: 10px;
}
.df-arch .lns {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--df-fg-muted);
}
.df-arch .lns.mono {
  font-family: var(--df-mono);
  font-size: 12px;
}
.df-arch .lns span { display: block; }
.df-arch-arrow {
  height: 32px;
  margin-left: 164px;
  position: relative;
}
.df-arch-arrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--df-border-strong), var(--df-accent));
}
.df-arch-arrow::after {
  content: "";
  position: absolute;
  left: -3px; bottom: 0;
  width: 7px; height: 7px;
  background: var(--df-accent);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
}
.df-arch-arrow.split::before {
  background: var(--df-border-strong);
}
.df-arch-arrow.split::after {
  background: var(--df-fg-dim);
}

/* Spec tables */
.df-spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
  font-family: var(--df-sans);
}
.df-spec-table th,
.df-spec-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--df-border);
  font-size: 14px;
  vertical-align: top;
}
.df-spec-table thead th {
  font-family: var(--df-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--df-fg-dim);
  border-bottom: 1px solid var(--df-border-strong);
  padding-top: 0;
  font-weight: 600;
}
.df-spec-table tbody th {
  font-family: var(--df-mono);
  font-size: 11px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--df-fg-dim);
  font-weight: 500;
  width: 200px;
}
.df-spec-table tbody td {
  color: var(--df-fg);
  line-height: 1.5;
}

/* Tools list (brief) */
.df-brief-tools {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--df-border);
  border: 1px solid var(--df-border);
}
.df-brief-tools .tool {
  background: var(--df-bg-card);
  padding: 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.df-brief-tools .tool .name {
  font-family: var(--df-mono);
  font-size: 13px;
  color: var(--df-accent);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.df-brief-tools .tool .sig {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.02em;
  word-break: break-word;
}
.df-brief-tools .tool p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--df-fg-muted);
}

/* Deployment cards */
.df-deploy-grid {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--df-border);
  border: 1px solid var(--df-border);
}
.df-deploy-card {
  background: var(--df-bg-card);
  padding: var(--df-card-pad);
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 320px;
}
.df-deploy-card .ix {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.df-deploy-card h3 {
  font-size: 22px;
  font-weight: 400;
  line-height: 1.2;
  margin: 0 0 4px;
  color: var(--df-fg);
}
.df-deploy-card p {
  font-size: 14px;
  line-height: 1.55;
  color: var(--df-fg-muted);
  margin: 0;
}
.df-deploy-list {
  margin-top: auto;
  list-style: none;
  padding: 14px 0 0;
  border-top: 1px solid var(--df-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-muted);
  letter-spacing: 0.04em;
}
.df-deploy-list li::before {
  content: "› ";
  color: var(--df-fg-dim);
}

/* Security & compliance list */
.df-sec-list {
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--df-border);
  border-left: 1px solid var(--df-border);
}
.df-sec-list > div {
  border-right: 1px solid var(--df-border);
  border-bottom: 1px solid var(--df-border);
  padding: 22px 24px;
  background: var(--df-bg-card);
}
.df-sec-list dt {
  font-family: var(--df-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--df-accent);
  margin-bottom: 8px;
  font-weight: 600;
}
.df-sec-list dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--df-fg);
  max-width: 50ch;
}

/* =================== Reveal on scroll =================== */
/* Reveal-on-scroll — DISABLED.
   The `.df-reveal` markup is kept across pages (so we don't have to remove it
   from every page), but it now has no effect on visibility. The previous
   opacity-based reveal was fragile: hidden tabs paused the transition,
   background-throttling halted RAF, and any JS hiccup left content
   permanently invisible. Content visibility shouldn't depend on any of that. */
.df-reveal { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 1080px) {
  .df-nav-links { gap: 20px; font-size: 12px; }
}
@media (max-width: 760px) {
  .df-nav-links { display: none; }
}

@media (max-width: 980px) {
  .df-hero-grid, .df-models-grid, .df-close-grid, .df-hero-b-bottom, .df-footer-grid { grid-template-columns: 1fr; gap: 48px; }
  .df-feature.span-6, .df-feature.span-4, .df-feature.span-8 { grid-column: span 12; }
  .df-hero-b-strip { grid-template-columns: repeat(2, 1fr); }
  .df-hero-b-strip > div:nth-child(2) { border-right: none; }
  :root { --df-edge: 24px; --df-section-y: 80px; }

  /* Lifecycle timeline */
  .df-timeline-axis { grid-template-columns: 1fr; padding: 0; }
  .df-timeline-axis::before { display: none; }
  .df-timeline-axis .cell { flex-direction: row; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--df-border); }
  .df-timeline-cards { grid-template-columns: 1fr; }

  /* FAQ */
  .df-faq-list summary { grid-template-columns: 44px 1fr 28px; gap: 16px; padding: 20px 4px; }
  .df-faq-list summary .q { font-size: 16px; }
  .df-faq-list .a { padding-left: 64px; padding-right: 16px; }

  /* Page hero */
  .df-page-hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .df-page-hero-meta { padding-top: 16px; }

  /* Research grid */
  .df-research-grid { grid-template-columns: 1fr; }
  .df-research-card-wide { grid-column: span 1; }

  /* Papers */
  .df-paper { grid-template-columns: 1fr; gap: 16px; }

  /* Roles */
  .df-role-head { grid-template-columns: 32px 1fr; gap: 12px; }
  .df-role-head .df-btn { grid-column: 1 / -1; justify-self: start; }
  .df-role-body { padding-left: 0; }
  .df-role-cols { grid-template-columns: 1fr; gap: 24px; }

  /* Brief */
  .df-brief-toc { grid-template-columns: 1fr; gap: 16px; }
  .df-brief-toc ol { columns: 1; }
  .df-brief-section { padding: 64px 0; }
  .df-arch-row { grid-template-columns: 1fr; gap: 8px; }
  .df-arch .role { padding-top: 0; }
  .df-arch-row.two { grid-template-columns: 1fr; }
  .df-arch-row.two .pair { grid-template-columns: 1fr; gap: 8px; padding: 18px; }
  .df-arch-arrow { margin-left: 0; }
  .df-spec-table tbody th { width: auto; }
  .df-brief-tools { grid-template-columns: 1fr; }
  .df-deploy-grid { grid-template-columns: 1fr; }
  .df-sec-list { grid-template-columns: 1fr; }

  .df-why-grid { grid-template-columns: 1fr; }
  .df-why-banner { aspect-ratio: 16 / 9; }
  .df-why-banner-meta { left: 20px; right: 20px; bottom: 20px; }
}

/* =================================================================
   NAV DROPDOWNS
   ================================================================= */
.df-nav-item {
  position: relative;
}
.df-nav-trigger {
  cursor: pointer;
  user-select: none;
  line-height: 1;
}
.df-caret {
  font-size: 10px;
  margin-left: 6px;
  opacity: 0.6;
  transition: transform var(--df-fast), opacity var(--df-fast);
  display: inline-block;
}
.df-nav-item:hover .df-caret {
  opacity: 1;
  transform: translateY(2px);
}

/* Active page underline — sits flush below the trigger box */
.df-nav-links > a.df-nav-active,
.df-nav-links > .df-nav-item.df-nav-active > .df-nav-trigger {
  color: var(--df-fg);
  position: relative;
}
.df-nav-links > a.df-nav-active::after,
.df-nav-links > .df-nav-item.df-nav-active > .df-nav-trigger::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--df-accent);
}
/* Hover on the currently active item — must re-assert inversion so the
   trigger text stays visible against the dark hover background */
.df-nav-links > a.df-nav-active:hover,
.df-nav-links > .df-nav-item.df-nav-active:hover > .df-nav-trigger {
  color: var(--df-bg);
  background: var(--df-fg);
}

.df-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: var(--df-bg-card);
  border: 1px solid var(--df-border-strong);
  min-width: 260px;
  z-index: 200;
  padding: 4px;
  box-shadow: 0 12px 32px -12px rgba(0, 0, 0, 0.35);
}
.df-nav-item:hover .df-dropdown { display: flex; flex-direction: column; }
.df-nav-links .df-dropdown a {
  padding: 12px 16px;
  font-family: var(--df-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--df-fg-muted);
  display: block;
  white-space: nowrap;
  transition: background var(--df-fast), color var(--df-fast);
  border-radius: 0;
  height: auto;
}
.df-nav-links .df-dropdown a:hover {
  background: var(--df-accent);
  color: #ffffff;
}
.df-nav-links .df-dropdown a.df-nav-active {
  color: var(--df-bg);
  background: var(--df-fg);
}
.df-nav-links .df-dropdown a.df-nav-active:hover {
  background: var(--df-accent);
  color: #ffffff;
}
.df-nav-links .df-dropdown a.df-nav-active::after { display: none; }

/* Bridge the small gap between trigger and dropdown so the menu
   doesn't disappear when the cursor moves over it */
.df-nav-item::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 0; right: 0;
  height: 8px;
}

@media (max-width: 760px) {
  .df-nav-item { display: none; }
}

/* =================================================================
   DETECTION PAGE - PRIMITIVES GRID
   ================================================================= */
.df-primitives {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--df-border);
  border: 1px solid var(--df-border);
  margin-top: 40px;
}
.df-primitive-block {
  background: var(--df-bg-card);
  display: grid;
  grid-template-columns: 220px 1fr;
}
.df-primitive-img {
  border-right: 1px solid var(--df-border);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.df-primitive-placeholder {
  width: 100%;
  height: 100%;
  background: var(--df-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--df-mono);
  font-size: 10px;
  color: var(--df-fg-dim);
  letter-spacing: 0.1em;
  text-align: center;
  padding: 16px;
}
.df-primitive-body { padding: 28px 24px; }
.df-primitive-body .df-num {
  font-family: var(--df-mono);
  font-size: 10px;
  color: var(--df-accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.df-primitive-body h3 {
  font-size: 16px;
  font-weight: 500;
  margin: 0 0 10px;
  line-height: 1.3;
  color: var(--df-fg);
}
.df-primitive-body p {
  font-size: 13.5px;
  color: var(--df-fg-muted);
  line-height: 1.65;
  margin: 0;
}
@media (max-width: 980px) {
  .df-primitives { grid-template-columns: 1fr; }
  .df-primitive-block { grid-template-columns: 1fr; }
  .df-primitive-img { aspect-ratio: 16 / 9; border-right: none; border-bottom: 1px solid var(--df-border); }
}

/* =================================================================
   DETECTION PAGE - COMPOSITIONS
   ================================================================= */
.df-compositions {
  border: 1px solid var(--df-border);
  margin-top: 40px;
  background: var(--df-bg-card);
}
.df-compositions h4 {
  font-family: var(--df-mono);
  font-size: 10px;
  color: var(--df-fg-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 20px;
  border-bottom: 1px solid var(--df-border);
  margin: 0;
  background: var(--df-bg);
}
.df-composition-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--df-border);
  align-items: baseline;
}
.df-composition-row:last-child { border-bottom: 0; }
.df-composition-row .name { font-size: 13.5px; font-weight: 500; color: var(--df-fg); }
.df-composition-row .def { font-size: 13px; color: var(--df-fg-muted); line-height: 1.6; }
@media (max-width: 640px) {
  .df-composition-row { grid-template-columns: 1fr; gap: 6px; }
}

/* =================================================================
   DETECTION PAGE - LATENCY TABLE
   ================================================================= */
.df-latency-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--df-border);
  margin-top: 40px;
}
.df-latency-table th {
  text-align: left;
  padding: 11px 16px;
  font-family: var(--df-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--df-fg-dim);
  background: var(--df-bg-card);
  border-bottom: 1px solid var(--df-border);
  font-weight: 400;
}
.df-latency-table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--df-border);
  font-size: 13.5px;
  color: var(--df-fg-muted);
}
.df-latency-table tbody tr:last-child td { border-bottom: 0; }
.df-latency-table tbody tr:hover td { background: var(--df-bg-card); }
.df-latency-table td.accent {
  font-family: var(--df-mono);
  color: var(--df-accent);
  font-weight: 500;
}

/* =================================================================
   ALERTS PAGE - SEVERITY TABLE
   ================================================================= */
.df-severity-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--df-border);
}
.df-severity-table th {
  text-align: left;
  padding: 11px 16px;
  font-family: var(--df-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--df-fg-dim);
  background: var(--df-bg-card);
  border-bottom: 1px solid var(--df-border);
  font-weight: 400;
}
.df-severity-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--df-border);
  font-size: 13.5px;
  color: var(--df-fg-muted);
  vertical-align: top;
}
.df-severity-table tr:last-child td { border-bottom: 0; }
.df-severity-table td:first-child {
  font-family: var(--df-mono);
  color: var(--df-fg);
  font-weight: 500;
  white-space: nowrap;
}
.df-severity-table tr.p1 td:first-child { color: var(--df-accent); }
@media (max-width: 760px) {
  .df-severity-table { font-size: 12px; }
  .df-severity-table th, .df-severity-table td { padding: 9px 12px; }
}

/* =================================================================
   DASHBOARDS PAGE - TILE GRID
   ================================================================= */
.df-tile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--df-border);
}
.df-tile {
  background: var(--df-bg-card);
  padding: 20px 22px;
  border-right: 1px solid var(--df-border);
  border-bottom: 1px solid var(--df-border);
}
.df-tile:nth-child(even) { border-right: none; }
.df-tile.accent {
  background: color-mix(in srgb, var(--df-accent-soft) 60%, var(--df-bg-card));
}
.df-tile .tile-label {
  font-family: var(--df-mono);
  font-size: 10px;
  color: var(--df-fg-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.df-tile .tile-val {
  font-size: 26px;
  font-weight: 400;
  color: var(--df-fg);
  line-height: 1;
  letter-spacing: -0.02em;
}
.df-tile.accent .tile-val { color: var(--df-accent); }
.df-tile .tile-sub {
  font-family: var(--df-mono);
  font-size: 10px;
  color: var(--df-fg-dim);
  margin-top: 6px;
}

/* =================================================================
   DASHBOARDS PAGE - CHAT UI
   ================================================================= */
.df-chat-msg {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}
.df-chat-msg .role-lbl {
  font-family: var(--df-mono);
  font-size: 10px;
  color: var(--df-fg-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.df-chat-msg .bubble {
  background: var(--df-bg);
  border: 1px solid var(--df-border);
  border-radius: 6px;
  padding: 12px 14px;
  font-size: 13.5px;
  color: var(--df-fg-muted);
  line-height: 1.55;
  max-width: 480px;
}
.df-chat-msg.model .bubble { background: var(--df-bg-card); }
.df-dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--df-border);
  background: var(--df-bg);
}
.df-dashboard-header .title {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg);
  letter-spacing: 0.04em;
}
.df-dashboard-header .badge {
  font-family: var(--df-mono);
  font-size: 9px;
  color: var(--df-accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid var(--df-accent);
  border-radius: 100px;
}

/* =================================================================
   USE-CASE CARDS (use-cases/index.html)
   ================================================================= */
.df-uc-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 32px;
  background: var(--df-bg-card);
  text-decoration: none;
  color: inherit;
  transition: background var(--df-fast);
  position: relative;
}
.df-uc-card:hover { background: var(--df-bg); }
.df-uc-card-wide { grid-column: 1 / -1; }
.df-uc-card .ix {
  font-family: var(--df-mono);
  font-size: 10px;
  color: var(--df-accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.df-uc-card h3 {
  font-size: 19px;
  font-weight: 400;
  margin: 0;
  color: var(--df-fg);
  line-height: 1.25;
}
.df-uc-card p {
  font-size: 14px;
  color: var(--df-fg-muted);
  line-height: 1.6;
  margin: 0;
}
.df-uc-card .industries {
  font-family: var(--df-mono);
  font-size: 10px;
  color: var(--df-fg-dim);
  letter-spacing: 0.06em;
  margin-top: auto;
  padding-top: 4px;
}
.df-uc-card .enter {
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-accent);
  letter-spacing: 0.06em;
  position: absolute;
  bottom: 28px;
  right: 28px;
  opacity: 0;
  transition: opacity var(--df-fast);
}
.df-uc-card:hover .enter { opacity: 1; }

/* Dropdown hover-bridge fix
   The .df-dropdown is offset by top: calc(100% + 16px). The 16px gap sits
   outside .df-nav-item's bounding box, so a hover-only dropdown closes when
   the cursor crosses it. This pseudo extends the hover area across the gap.
   Pointer-events left at default ('auto') so it always catches the cursor. */
.df-nav-item { position: relative; }
.df-nav-item::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  height: 18px;
}

/* Make sure the dropdown sits above mosaic tiles (z-index: 2 on homepage). */
/* =================================================================
   Models pages — styles for models.html, models-think.html,
   models-see.html. These classes were referenced in HTML but had
   no CSS, leaving the pages rendering as plain text in places.
   ================================================================= */

/* --- page-hero inner wrapper --- */
.df-page-hero-inner {
  max-width: 720px;
}

/* --- eyebrow ("● models", "● system 2 · planner · multimodal") --- */
.df-eyebrow {
  font-family: var(--df-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--df-fg-dim);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
}
.df-eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--df-accent);
  display: inline-block;
}

/* --- closing CTA section --- */
.df-page-cta {
  padding: 120px 0;
  text-align: center;
  border-top: 1px solid var(--df-border);
  background: var(--df-bg);
}
.df-page-cta .df-h1 {
  margin-bottom: 24px;
  text-wrap: balance;
}
.df-page-cta p {
  font-size: 17px;
  color: var(--df-fg-muted);
  line-height: 1.55;
  max-width: 56ch;
  margin: 0 auto 40px;
}

/* --- model split: THINK | divider | SEE --- */
.df-model-split {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: stretch;
  margin-top: 32px;
  border: 1px solid var(--df-border);
  border-radius: 4px;
  overflow: hidden;
  background: var(--df-bg-card);
}
.df-model-split-card {
  padding: 40px 36px 36px;
  display: flex;
  flex-direction: column;
}
.df-model-split-card:first-child {
  border-right: 1px solid var(--df-border);
}
.df-model-split-card:last-child {
  border-left: 1px solid var(--df-border);
}
.df-model-split-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  background: var(--df-bg-elev);
  gap: 12px;
}
.df-model-split-divider .tools-label {
  font-family: var(--df-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--df-fg-dim);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

/* --- chip row inside a model card --- */
.df-model-tag {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 22px;
}
.df-model-tag span {
  font-family: var(--df-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--df-fg-muted);
  border: 1px solid var(--df-border-strong);
  border-radius: 2px;
  padding: 4px 8px;
}

/* --- model name (Darkfield THINK / SEE) --- */
.df-model-name {
  font-family: var(--df-sans);
  font-size: 32px;
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--df-fg);
  margin: 0 0 12px;
}
.df-model-name em {
  font-style: normal;
  font-weight: 500;
  color: var(--df-accent);
}

/* --- capability list --- */
.df-cap-list {
  list-style: none;
  padding: 0;
  margin: 0 0 8px;
  border-top: 1px solid var(--df-border);
}
.df-cap-list li {
  font-size: 14px;
  line-height: 1.55;
  color: var(--df-fg-muted);
  padding: 12px 0;
  border-bottom: 1px solid var(--df-border);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.df-cap-list li::before {
  content: "›";
  color: var(--df-accent);
  font-weight: 600;
  flex-shrink: 0;
}

/* --- model card: model spec table --- */
.df-model-spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 24px;
  border: 1px solid var(--df-border);
}
.df-model-spec-table th,
.df-model-spec-table td {
  padding: 12px 18px;
  text-align: left;
  font-size: 13.5px;
  vertical-align: top;
  border-bottom: 1px solid var(--df-border);
}
.df-model-spec-table tr:last-child th,
.df-model-spec-table tr:last-child td {
  border-bottom: none;
}
.df-model-spec-table th {
  font-family: var(--df-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--df-fg-dim);
  font-weight: 500;
  background: var(--df-bg-elev);
  width: 30%;
  border-right: 1px solid var(--df-border);
}
.df-model-spec-table td { color: var(--df-fg); }
.df-model-spec-table .undisclosed {
  font-style: italic;
  color: var(--df-fg-muted);
}

/* --- reasoning trace (chat-style block) --- */
.df-trace-block {
  border: 1px solid var(--df-border);
  border-radius: 4px;
  background: var(--df-bg-card);
  margin-top: 32px;
  overflow: hidden;
}
.df-trace-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  background: var(--df-bg-elev);
  border-bottom: 1px solid var(--df-border);
  font-family: var(--df-mono);
  font-size: 11px;
  color: var(--df-fg-dim);
  letter-spacing: 0.06em;
}
.df-trace-header .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--df-accent);
}
.df-trace-header .label { color: var(--df-fg-muted); }

.df-trace-turn {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 22px;
  padding: 16px 22px 18px;
  border-bottom: 1px solid var(--df-border);
}
.df-trace-turn:last-child { border-bottom: none; }
.df-trace-turn .role {
  font-family: var(--df-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  align-self: start;
}
.df-trace-turn .role.partner { color: var(--df-fg); }
.df-trace-turn .role.think   { color: var(--df-accent); }
.df-trace-turn .role.tool    { color: #6ddc8a; }
.df-trace-turn .content {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--df-fg);
}

/* schema/pipeline blocks inside a trace turn */
.schema-block {
  display: block;
  margin: 8px 0;
  padding: 10px 14px;
  background: var(--df-bg-inset);
  border-left: 2px solid var(--df-accent);
  border-radius: 2px;
  font-family: var(--df-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--df-fg-muted);
  letter-spacing: 0.02em;
  word-break: break-word;
}
.schema-block strong {
  color: var(--df-accent);
  font-weight: 600;
}

@media (max-width: 720px) {
  .df-trace-turn { grid-template-columns: 1fr; gap: 6px; }
}

/* --- prompt gallery (models-see.html) --- */
.df-prompt-gallery {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--df-border);
  border-left: 1px solid var(--df-border);
  border-right: 1px solid var(--df-border);
  margin-top: 24px;
  border-radius: 4px;
  overflow: hidden;
}
.df-prompt-row {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--df-border);
  align-items: baseline;
}
.df-prompt-row .prompt-text {
  font-family: var(--df-mono);
}
.df-prompt-row .prompt-text code {
  font-family: var(--df-mono);
  font-size: 13px;
  color: var(--df-accent);
  background: var(--df-bg-inset);
  padding: 4px 8px;
  border-radius: 2px;
  white-space: normal;
  display: inline-block;
}
.df-prompt-row .prompt-result {
  font-size: 14px;
  line-height: 1.55;
  color: var(--df-fg-muted);
}
@media (max-width: 720px) {
  .df-prompt-row { grid-template-columns: 1fr; gap: 8px; }
}

/* --- benchmark tables (models-see.html) --- */
.df-benchmark-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--df-border);
}
.df-benchmark-table th,
.df-benchmark-table td {
  padding: 12px 18px;
  text-align: left;
  font-size: 13.5px;
  border-bottom: 1px solid var(--df-border);
  border-right: 1px solid var(--df-border);
}
.df-benchmark-table th:last-child,
.df-benchmark-table td:last-child { border-right: none; }
.df-benchmark-table tr:last-child td { border-bottom: none; }
.df-benchmark-table thead th {
  font-family: var(--df-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--df-fg-dim);
  font-weight: 500;
  background: var(--df-bg-elev);
}
.df-benchmark-table tbody td { color: var(--df-fg-muted); }
.df-benchmark-table tbody td:first-child { color: var(--df-fg); font-weight: 500; }
.df-benchmark-table tbody tr.df-row {
  background: color-mix(in srgb, var(--df-accent) 7%, transparent);
}
.df-benchmark-table tbody tr.df-row td:first-child { color: var(--df-fg); }
.df-benchmark-table tbody td.best {
  color: var(--df-accent);
  font-weight: 600;
}
.df-benchmark-table tbody td.accent {
  color: var(--df-accent);
  font-weight: 600;
}

/* --- responsive: stack the model split on small screens --- */
@media (max-width: 980px) {
  .df-model-split { grid-template-columns: 1fr; }
  .df-model-split-card:first-child {
    border-right: none;
    border-bottom: 1px solid var(--df-border);
  }
  .df-model-split-card:last-child {
    border-left: none;
    border-top: 1px solid var(--df-border);
  }
  .df-model-split-divider {
    flex-direction: row;
    padding: 14px 22px;
  }
  .df-model-split-divider .tools-label {
    writing-mode: horizontal-tb;
    transform: none;
  }
}