/* ============================================================
   DeepLens — Design System v2
   Tokens → primitives → components. Light + dark.
   Legacy variable aliases kept so existing pages keep working.
   ============================================================ */

:root {
  /* ─── Brand ramp ─── */
  --brand-50: #eef4ff;
  --brand-100: #dbe7ff;
  --brand-200: #bed3ff;
  --brand-300: #91b5ff;
  --brand-400: #5d8dff;
  --brand-500: #3563e9;
  --brand-600: #244bd4;
  --brand-700: #1c3aa8;
  --brand-800: #1b3383;
  --brand-900: #1b2f68;

  /* ─── Neutral ramp ─── */
  --n-0: #ffffff;
  --n-25: #fbfcfe;
  --n-50: #f5f7fb;
  --n-100: #eef1f7;
  --n-200: #e2e7f0;
  --n-300: #cbd3e1;
  --n-400: #9aa5ba;
  --n-500: #6b7689;
  --n-600: #4e5768;
  --n-700: #3a4152;
  --n-800: #232936;
  --n-900: #141922;
  --n-950: #0c1017;

  /* ─── Semantic surfaces ─── */
  --bg: var(--n-50);
  --bg-elevated: var(--n-0);
  --surface: var(--n-0);
  --surface-2: var(--n-50);
  --surface-3: var(--n-100);
  --panel: var(--n-0);
  --nav: rgba(255, 255, 255, 0.82);
  --overlay: rgba(20, 25, 34, 0.45);

  /* ─── Text ─── */
  --text: var(--n-900);
  --text-primary: var(--n-900);
  --text-secondary: var(--n-600);
  --text-muted: var(--n-500);
  --text-onbrand: #ffffff;

  /* ─── Lines ─── */
  --border: var(--n-200);
  --border-strong: var(--n-300);
  --divider: var(--n-100);

  /* ─── Accent (primary action) ─── */
  --g-blue: var(--brand-500);
  --g-blue-hover: var(--brand-600);
  --g-blue-active: var(--brand-700);
  --g-blue-soft: var(--brand-50);
  --g-blue-soft-2: var(--brand-100);
  --g-blue-ink: var(--brand-700);
  --ring: rgba(53, 99, 233, 0.35);

  /* ─── Status ─── */
  --danger: #d92d20;
  --danger-soft: #fef3f2;
  --danger-ink: #912018;
  --success: #0d9f6e;
  --success-soft: #ecfdf5;
  --success-ink: #05603a;
  --warn: #dc6803;
  --warn-soft: #fffaeb;
  --warn-ink: #93370d;

  /* ─── Gradients ─── */
  --grad: linear-gradient(135deg, var(--brand-500), var(--brand-400));
  --grad2: linear-gradient(135deg, var(--brand-600), var(--brand-300));
  --panel-grad: linear-gradient(160deg, var(--brand-600) 0%, var(--brand-500) 45%, var(--brand-300) 100%);
  --glow: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(53, 99, 233, 0.13), transparent 70%);

  /* ─── Elevation (tinted, not muddy grey) ─── */
  --shadow-xs: 0 1px 2px rgba(20, 25, 34, 0.05);
  --shadow-sm: 0 1px 2px rgba(20, 25, 34, 0.06), 0 2px 6px rgba(20, 25, 34, 0.04);
  --shadow: 0 1px 2px rgba(20, 25, 34, 0.05), 0 8px 20px -6px rgba(20, 25, 34, 0.1);
  --shadow-lg: 0 2px 4px rgba(20, 25, 34, 0.04), 0 18px 40px -12px rgba(20, 25, 34, 0.16);
  --shadow-xl: 0 4px 8px rgba(20, 25, 34, 0.04), 0 32px 64px -16px rgba(20, 25, 34, 0.2);
  --shadow-brand: 0 6px 18px -4px rgba(53, 99, 233, 0.35);

  /* ─── Radii ─── */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-2xl: 28px;
  --radius-pill: 999px;

  /* ─── Type ─── */
  --font: "Manrope", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --display: var(--font);

  --fs-xs: 12px;
  --fs-sm: 13px;
  --fs-base: 15px;
  --fs-md: 16px;
  --fs-lg: 18px;
  --fs-xl: clamp(20px, 1.4vw, 22px);
  --fs-h3: clamp(18px, 1.6vw, 20px);
  --fs-h2: clamp(26px, 3.2vw, 40px);
  --fs-h1: clamp(34px, 4.6vw, 56px);
  --lh-tight: 1.15;
  --lh-snug: 1.35;
  --lh: 1.6;
  --tracking-tight: -0.028em;

  /* ─── Space ─── */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-20: 80px;

  /* ─── Motion ─── */
  --ease: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.14s;
  --dur: 0.22s;
  --dur-slow: 0.4s;

  /* ─── Layout ─── */
  --container-max: 1180px;
  --gutter: 24px;
  --section-y: clamp(56px, 7vw, 96px);
  --nav-h: 68px;

  /* ─── Legacy aliases (do not remove) ─── */
  --cyan: var(--brand-500);
  --blue: var(--brand-400);
  --purple: var(--brand-500);
  --lpurple: var(--brand-300);
  --text2: var(--text-secondary);
  --text3: var(--text-muted);
}

[data-theme="dark"] {
  /* Surfaces climb in clear steps so cards read as raised, not painted on. */
  --bg: #07090f;
  --bg-elevated: #0d111a;
  --surface: #151b26;
  --surface-2: #1b2230;
  --surface-3: #232b3b;
  --panel: #151b26;
  --nav: rgba(10, 13, 20, 0.72);
  --overlay: rgba(0, 0, 0, 0.66);

  --text: #f0f3f9;
  --text-primary: #f0f3f9;
  --text-secondary: #aab4c6;
  --text-muted: #838d9f;
  --text-onbrand: #07090f;

  --border: #2b3446;
  --border-strong: #3d4859;
  --divider: #222a39;

  /* Light top edge: how depth actually reads on dark backgrounds. */
  --edge-light: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  --edge-light-strong: inset 0 1px 0 rgba(255, 255, 255, 0.1);

  --g-blue: #7fa4ff;
  --g-blue-hover: #9db9ff;
  --g-blue-active: #bdd0ff;
  --g-blue-soft: rgba(127, 164, 255, 0.12);
  --g-blue-soft-2: rgba(127, 164, 255, 0.2);
  --g-blue-ink: #c9d9ff;
  --ring: rgba(127, 164, 255, 0.4);

  --danger: #ff8a80;
  --danger-soft: rgba(255, 138, 128, 0.13);
  --danger-ink: #ffb4ad;
  --success: #5fd4a4;
  --success-soft: rgba(95, 212, 164, 0.13);
  --success-ink: #9ae8c8;
  --warn: #f5b544;
  --warn-soft: rgba(245, 181, 68, 0.13);
  --warn-ink: #f8cd85;

  --grad: linear-gradient(135deg, #3563e9, #7fa4ff);
  --grad2: linear-gradient(135deg, #244bd4, #7fa4ff);
  --panel-grad: linear-gradient(160deg, #1c3aa8 0%, #3563e9 50%, #7fa4ff 100%);
  --glow: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(127, 164, 255, 0.12), transparent 70%);

  /* Each level pairs a lit top edge with the drop shadow — a pure black blur
     is invisible against a near-black page. */
  --shadow-xs: var(--edge-light), 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-sm: var(--edge-light), 0 2px 8px rgba(0, 0, 0, 0.45);
  --shadow: var(--edge-light), 0 12px 28px -10px rgba(0, 0, 0, 0.8);
  --shadow-lg: var(--edge-light-strong), 0 24px 52px -18px rgba(0, 0, 0, 0.9);
  --shadow-xl: var(--edge-light-strong), 0 44px 80px -24px rgba(0, 0, 0, 0.95);
  --shadow-brand: 0 8px 24px -8px rgba(53, 99, 233, 0.7);
}

/* ============================================================
   Base
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: light;
  -webkit-text-size-adjust: 100%;
}
[data-theme="dark"] { color-scheme: dark; }

body {
  min-height: 100vh;
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: var(--lh);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  font-feature-settings: "cv11", "ss01";
}

a { color: inherit; text-decoration: none; }
img, svg, video, canvas { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--display);
  letter-spacing: var(--tracking-tight);
  line-height: var(--lh-snug);
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); font-weight: 800; line-height: var(--lh-tight); }
h2 { font-size: var(--fs-h2); font-weight: 800; }
h3 { font-size: var(--fs-h3); font-weight: 700; }
p { text-wrap: pretty; }

::selection { background: var(--g-blue-soft-2); color: var(--text); }

:focus-visible {
  outline: 2px solid var(--g-blue);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}
:focus:not(:focus-visible) { outline: none; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--g-blue);
  color: var(--text-onbrand);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--fs-sm);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 12px; }

/* Custom scrollbar (desktop) */
@media (pointer: fine) {
  * { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
  *::-webkit-scrollbar { width: 10px; height: 10px; }
  *::-webkit-scrollbar-track { background: transparent; }
  *::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: var(--radius-pill);
    border: 3px solid transparent;
    background-clip: content-box;
  }
  *::-webkit-scrollbar-thumb:hover { background: var(--text-muted); background-clip: content-box; }
}

/* ============================================================
   Nav
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav.is-scrolled { border-bottom-color: var(--border); }
.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
}
.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--grad);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-brand);
}
.logo em { font-style: normal; color: var(--g-blue); }

.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); background: var(--surface-3); }

.nav-right { display: flex; align-items: center; gap: var(--sp-2); }
.nav-user { display: flex; align-items: center; gap: 10px; }
.nav-user-name {
  font-size: var(--fs-sm);
  font-weight: 700;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.nav-user[hidden] { display: none !important; }

.btn-signin {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  transition: background var(--dur-fast), color var(--dur-fast);
}
.btn-signin:hover { color: var(--text); background: var(--surface-3); }

.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--g-blue);
  color: var(--text-onbrand) !important;
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 700;
  box-shadow: var(--shadow-brand);
  transition: background var(--dur) var(--ease), transform var(--dur-fast) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn-nav:hover { background: var(--g-blue-hover); transform: translateY(-1px); }
.btn-nav:active { transform: translateY(0); }

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background var(--dur-fast), border-color var(--dur-fast), color var(--dur-fast);
}
.icon-btn:hover { border-color: var(--border-strong); color: var(--text); background: var(--surface-2); }

.nav-lang {
  height: 38px;
  padding: 0 30px 0 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface)
    url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%236b7689' stroke-width='2'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E")
    no-repeat right 8px center;
  color: var(--text);
  font-size: var(--fs-sm);
  font-weight: 600;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}
.nav-lang:hover { border-color: var(--border-strong); }

.mobile-menu {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
  padding: 6px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn-primary,
.btn-outline,
.btn-ghost,
.btn-browse,
.drop-btn,
.upload-btn,
.btn-export,
.btn-secondary,
.btn-reset,
.btn-retry {
  border-radius: var(--radius-md);
  font-family: var(--font);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  background: var(--g-blue);
  color: var(--text-onbrand);
  border: 1px solid transparent;
  cursor: pointer;
  font-size: var(--fs-base);
  font-weight: 700;
  box-shadow: var(--shadow-brand);
  transition: background var(--dur) var(--ease), transform var(--dur-fast) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn-primary:hover { background: var(--g-blue-hover); transform: translateY(-1px); }
.btn-primary:active { background: var(--g-blue-active); transform: translateY(0); }
.btn-primary:disabled { opacity: 0.55; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  font-size: var(--fs-base);
  font-weight: 700;
  box-shadow: var(--shadow-xs);
  transition: border-color var(--dur-fast), background var(--dur-fast), transform var(--dur-fast) var(--ease);
}
.btn-outline:hover { border-color: var(--border-strong); background: var(--surface-2); transform: translateY(-1px); }
.btn-outline:active { transform: translateY(0); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.btn-ghost:hover { background: var(--surface-3); color: var(--text); }

.btn-secondary,
.btn-reset,
.btn-retry,
.drop-btn,
.btn-browse,
.upload-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: var(--fs-sm);
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--dur-fast), background var(--dur-fast), color var(--dur-fast);
}
.btn-secondary:hover,
.btn-reset:hover,
.btn-retry:hover,
.drop-btn:hover,
.btn-browse:hover,
.upload-btn:hover { border-color: var(--g-blue); color: var(--g-blue); background: var(--g-blue-soft); }

.btn-export {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 18px;
  background: var(--g-blue);
  color: var(--text-onbrand);
  border: none;
  font-size: var(--fs-sm);
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow-brand);
  transition: background var(--dur) var(--ease), transform var(--dur-fast);
}
.btn-export:hover { background: var(--g-blue-hover); transform: translateY(-1px); }

/* ============================================================
   Surfaces
   ============================================================ */
.card,
.float-card,
.upload-panel,
.result-panel,
.analysis-panel,
.bottom-panel,
.verdict-card,
.stat-badge,
.stat-card,
.qaction,
.cta-box,
.product-card,
.trust-card,
.compliance-card,
.metric,
.api-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  backdrop-filter: none;
}

.dropzone,
.drop-zone,
.upload-area {
  border-radius: var(--radius-lg);
  background: var(--surface-2);
}

/* ============================================================
   Tags / badges
   ============================================================ */
.tag,
.hero-tag,
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: var(--radius-pill);
  background: var(--g-blue-soft);
  border: 1px solid transparent;
  color: var(--g-blue-ink);
  font-family: var(--font);
  font-size: var(--fs-xs);
  letter-spacing: 0.01em;
  text-transform: none;
  font-weight: 700;
  padding: 5px 12px;
}
[data-theme="dark"] .tag,
[data-theme="dark"] .hero-tag,
[data-theme="dark"] .section-tag,
[data-theme="dark"] .system-badge { color: var(--g-blue); }

.badge-success { background: var(--success-soft); color: var(--success-ink); }
.badge-danger { background: var(--danger-soft); color: var(--danger-ink); }
.badge-warn { background: var(--warn-soft); color: var(--warn-ink); }
[data-theme="dark"] .badge-success { color: var(--success); }
[data-theme="dark"] .badge-danger { color: var(--danger); }
[data-theme="dark"] .badge-warn { color: var(--warn); }

/* ============================================================
   Layout helpers
   ============================================================ */
.dl-container,
.nav-inner,
.footer-inner,
.stats-section > .stats-grid,
.features-inner,
.cta-section > .cta-box,
.preview-section > .preview-grid {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
}
.dl-container { padding-left: var(--gutter); padding-right: var(--gutter); }
.dl-section { padding-top: var(--section-y); padding-bottom: var(--section-y); }
.dl-section > .dl-container { width: 100%; }
.dl-section--alt {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section,
.analysis-section,
.hero-content,
.quick-section {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.hero { padding-top: calc(var(--nav-h) + 40px); }
.section,
.analysis-section { padding-top: var(--section-y); padding-bottom: var(--section-y); }
.quick-section { padding-top: var(--sp-12); padding-bottom: var(--section-y); }

.page-shell { padding-top: var(--nav-h); }

.stats-section,
.features-inner,
.cta-section,
.footer-inner,
.workspace-inner,
.enterprise-inner {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer,
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
  padding: 0;
  color: var(--text-secondary);
  font-size: var(--fs-sm);
}

/* ============================================================
   Dark-mode depth
   Dark UIs read as flat when every plane is the same value. These
   rules add: an ambient page glow, lit card edges, and warmer hovers.
   ============================================================ */
[data-theme="dark"] body {
  background-image:
    radial-gradient(ellipse 90% 50% at 50% -8%, rgba(53, 99, 233, 0.16), transparent 60%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(127, 164, 255, 0.06), transparent 55%);
  background-attachment: fixed;
  background-repeat: no-repeat;
}

[data-theme="dark"] .card,
[data-theme="dark"] .info-card,
[data-theme="dark"] .feature-card,
[data-theme="dark"] .step-card,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .preview-card,
[data-theme="dark"] .product-card,
[data-theme="dark"] .tech-pill,
[data-theme="dark"] .upload-panel,
[data-theme="dark"] .result-panel,
[data-theme="dark"] .evidence-panel,
[data-theme="dark"] .signal-panel,
[data-theme="dark"] .dash-card,
[data-theme="dark"] .dash-stat,
[data-theme="dark"] .dash-api-card {
  background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 46%);
}

[data-theme="dark"] .info-card:hover,
[data-theme="dark"] .feature-card:hover,
[data-theme="dark"] .product-card:hover,
[data-theme="dark"] .dash-card:hover {
  border-color: var(--border-strong);
  background-image: linear-gradient(180deg, rgba(127, 164, 255, 0.07), transparent 52%);
}

/* Alternating sections need a visible step, not a 2% nudge. */
[data-theme="dark"] .dl-section--alt,
[data-theme="dark"] .product-section--alt {
  background: var(--bg-elevated);
  box-shadow: var(--edge-light);
}

[data-theme="dark"] .nav.is-scrolled {
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04), 0 10px 30px -12px rgba(0, 0, 0, 0.8);
}

/* Mono/code surfaces sit slightly darker than their card. */
[data-theme="dark"] .dash-api-card pre,
[data-theme="dark"] .fchart,
[data-theme="dark"] .seg-chart,
[data-theme="dark"] .metrics {
  background-color: rgba(0, 0, 0, 0.28);
}

/* ============================================================
   Utility
   ============================================================ */
.mono { font-family: var(--mono); }
.text-muted { color: var(--text-muted); }
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 760px) {
  /* Keep the bar to: logo · theme · primary action · menu */
  .nav-lang,
  .nav-user-name,
  .btn-signin { display: none; }
  .btn-nav { padding: 9px 14px; }
  .nav-inner { gap: 10px; padding: 0 16px; }
  .logo { font-size: 17px; }
  .logo-mark { width: 30px; height: 30px; }
}

@media (max-width: 480px) {
  /* Wordmark drops out so the actions never overflow the bar. */
  .logo { font-size: 0; gap: 0; }
  .btn-nav,
  .nav-right .btn-outline { padding: 9px 12px; font-size: var(--fs-xs); }
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .mobile-menu { display: block; }
  .nav-links.is-open {
    display: flex !important;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px var(--gutter) 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.is-open a { padding: 12px 14px; }
}