/* =========================================================================
   VOYAGER BRAND KIT v1.1  —  Paramount Shortform Demo
   Single source of truth for tokens, reset, typography, nav, footer,
   buttons, chips, focus. Import on every page:
   <link rel="stylesheet" href="/brand.css">
   ========================================================================= */

/* ---------- 1. Design tokens ---------- */
:root {
  /* Canonical palette */
  --bg:        #0a0a0f;
  --bg-base:   #0a0a0f;
  --panel:     #14161b;
  --bg-surface:#14161b;
  --bg-elevated:#1f2330;
  --bdr:       #1f2330;
  --txt:       #eaedf2;
  --text-primary:   rgba(255,255,255,0.96);
  --text-secondary: rgba(255,255,255,0.68);
  --muted:     #8a93a3;
  --text-muted: rgba(255,255,255,0.44);

  --accent:    #64db82;   /* Voyager green (mm5 ink) */
  --accent-2:  #2367f5;   /* legacy Facet blue, demoted to link */
  --warn:      #f5a524;
  --alert:     #ef4444;
  --danger:    #ef4444;

  --border-subtle: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.18);

  --overlay-soft:   rgba(10,10,15,0.5);
  --overlay-strong: rgba(10,10,15,0.85);
  --blur-sm: blur(8px);
  --blur-md: blur(20px);

  /* Type */
  --f-display: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --f-text:    -apple-system, 'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
  --f-mono:    'SF Mono', ui-monospace, Menlo, monospace;
  --fs-display: 20px; --lh-display: 1.25; --fw-display: 600;
  --fs-body:    14px; --lh-body:    1.45; --fw-body:    500;
  --fs-meta:    11px; --lh-meta:    1.3;  --fw-meta:    600;
  --fs-hero:    36px;

  /* Spacing — 8px grid */
  --sp-1: 4px; --sp-2: 8px; --sp-3: 16px; --sp-4: 24px; --sp-5: 40px;

  /* Components */
  --btn-h: 32px;
  --btn-h-sm: 24px;
  --btn-h-lg: 44px;
  --btn-px: 14px;
  --chip-px: 10px;
  --chip-py: 4px;
  --radius-card: 12px;
  --radius-btn: 6px;
  --radius-chip: 999px;
  --focus-ring: 0 0 0 2px var(--bg-base), 0 0 0 4px var(--accent);
}

/* ---------- 2. Reset (light touch — don't fight existing page CSS) ---------- */
.voyager *, .voyager *::before, .voyager *::after { box-sizing: border-box; }
[class*="voyager--"] { -webkit-text-size-adjust: 100%; -webkit-font-smoothing: antialiased; }

/* ---------- 3. Reduced motion (WCAG 2.3.3 + 2.2.2) ---------- */
@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;
  }
}

/* ---------- 4. Wordmark / Brand Lockup ---------- */
.brand-lockup, .voyager-brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--f-display); color: var(--txt);
  text-decoration: none; line-height: 1;
}
.brand-lockup .v-mark, .voyager-brand svg { width: 24px; height: 24px; flex: 0 0 24px; }
.brand-lockup .wordmark, .voyager-wordmark {
  font-size: 18px; font-weight: 700; letter-spacing: -0.01em; color: var(--txt);
}
.brand-lockup .tagline, .voyager-tagline {
  font-size: 12px; font-weight: 400; color: var(--muted);
  border-left: 1px solid var(--bdr); padding-left: 10px; margin-left: 2px;
}
.brand-lockup:hover .wordmark, .voyager-brand:hover .voyager-wordmark { color: var(--accent); }

/* ---------- 5. Canonical Nav (used by /nav.js + /nav-partial.html) ---------- */
#voyager-nav { position: sticky; top: 0; z-index: 100; }
.voyager-nav-inner, .site-nav {
  display: flex; align-items: center; gap: 20px;
  padding: 12px 20px;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--bdr);
  font-family: var(--f-text); font-size: 13px;
}
.voyager-nav-links { display: flex; gap: 16px; align-items: center; list-style: none; margin: 0; padding: 0; }
.site-nav .nav-links { display: flex; gap: 16px; margin-left: auto; }
.voyager-nav-links a, .site-nav a.nav-link {
  color: var(--muted); text-decoration: none;
  /* WCAG 2.5.5 minimum touch target — 44px height via padding */
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.02em;
  transition: color 150ms, background 150ms;
}
.vv-btn {
  /* WCAG 2.5.5 touch target — bumped on mobile */
  min-height: 32px;
}
@media (pointer: coarse), (max-width: 640px) {
  .vv-btn { min-height: 44px; padding: 0 14px; }
  .voyager-nav-links a { padding-top: 10px; padding-bottom: 10px; }
}
.voyager-nav-links a:hover, .site-nav a.nav-link:hover {
  color: var(--txt); background: var(--panel);
}
.voyager-nav-links a.active, .voyager-nav-links a[aria-current="page"],
.site-nav a.nav-link.active {
  color: var(--accent);
  background: rgba(100,219,130,0.08);
}

/* Variant switcher inside nav */
.voyager-variant-switcher {
  margin-left: auto;
  display: flex; align-items: center; gap: 2px;
  padding: 2px;
  background: var(--panel);
  border: 1px solid var(--bdr);
  border-radius: var(--radius-chip);
}
.vv-btn {
  background: transparent; border: none;
  padding: 4px 10px;
  font-size: 11px; font-weight: 600; line-height: 1;
  color: var(--muted); cursor: pointer;
  border-radius: var(--radius-chip);
  transition: background 120ms, color 120ms;
}
.vv-btn:hover { color: var(--txt); }
.vv-btn.active, .vv-btn[aria-pressed="true"] {
  background: var(--accent); color: var(--bg-base);
}

/* ---------- 6. Canonical Footer ---------- */
.site-footer, footer.site-footer {
  margin-top: 60px; padding: 20px;
  border-top: 1px solid var(--bdr);
  font-family: var(--f-mono); font-size: 11px;
  color: var(--muted);
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: space-between;
}
.site-footer .sha, .site-footer .sf-sha { color: var(--accent); }
.site-footer a { color: var(--muted); transition: color 150ms; }
.site-footer a:hover { color: var(--txt); text-decoration: underline; }
.site-footer .sf-notice { color: var(--warn); font-style: italic; }

/* ---------- 7. Canonical button system (24 ad-hoc classes → 4 types) ----------
     .btn        rectangular (sort, tree, header, filter group)
     .btn-cta    hero/landing CTA — larger footprint
     .chip       filter chips, pill toggles, status pills (24px tall)
     .icon-btn   round icon-only (rail, close, play overlay)
   Modifiers: --lg, --ghost, .btn-primary
   States:    .active or [aria-pressed="true"]
*/

/* 7a. Base rectangular */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
  height: var(--btn-h);
  padding: 0 var(--btn-px);
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--bdr);
  border-radius: var(--radius-btn);
  font-family: var(--f-text);
  font-size: 12px; font-weight: 600; line-height: 1;
  cursor: pointer; white-space: nowrap;
  transition: background 120ms, border-color 120ms, color 120ms;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover:not(:disabled) {
  background: var(--overlay-soft);
  color: var(--txt);
  border-color: var(--accent);
}
.btn.active, .btn[aria-pressed="true"] {
  background: var(--accent); color: var(--bg-base); border-color: var(--accent);
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* 7b. Hero CTA — larger, only for landing pages */
.btn-cta {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: var(--btn-h-lg); padding: 0 22px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  font-family: var(--f-text);
  font-size: 14px; font-weight: 600; line-height: 1;
  background: var(--accent); color: var(--bg-base);
  cursor: pointer; transition: filter 120ms, background 120ms, border-color 120ms;
}
.btn-cta:hover:not(:disabled) { filter: brightness(1.08); }
.btn-cta.btn-ghost {
  background: transparent; color: var(--txt); border-color: var(--border-strong);
}
.btn-cta.btn-ghost:hover:not(:disabled) {
  background: var(--panel); border-color: var(--accent);
}

/* 7c. Canonical chip */
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  height: var(--btn-h-sm);
  padding: 0 var(--chip-px);
  background: transparent;
  color: rgba(255,255,255,0.65);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-chip);
  font-family: var(--f-text);
  font-size: 11px; font-weight: 500; line-height: 1;
  white-space: nowrap; cursor: pointer;
  transition: background 120ms, border-color 120ms, color 120ms;
}
.chip:hover:not(:disabled) {
  color: var(--txt);
  border-color: rgba(255,255,255,0.35);
}
.chip.active, .chip[aria-pressed="true"] {
  background: var(--accent); color: var(--bg-base); border-color: var(--accent);
}

/* 7d. Icon-only round buttons */
.icon-btn {
  width: var(--btn-h); height: var(--btn-h);
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.16); color: #fff;
  border: none; border-radius: 50%;
  cursor: pointer; font-size: 14px;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: background 120ms;
}
.icon-btn:hover:not(:disabled) { background: rgba(255,255,255,0.26); }
.icon-btn--lg { width: var(--btn-h-lg); height: var(--btn-h-lg); font-size: 18px; }
.icon-btn--ghost { background: transparent; color: var(--muted); }

/* ---------- 8. Focus-visible (canonical, WCAG 2.4.7) ---------- */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: inherit;
}
.btn:focus-visible, .chip:focus-visible, .icon-btn:focus-visible {
  box-shadow: var(--focus-ring); outline: none;
}

/* ---------- 9. Watermark (drop inside .video-wrap / .clip-stage) ---------- */
.voyager-watermark {
  position: absolute; top: 12px; right: 12px; z-index: 5;
  font-family: var(--f-display); font-size: 11px; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  color: rgba(255,255,255,.55); text-shadow: 0 1px 2px rgba(0,0,0,.6);
  pointer-events: none; user-select: none;
}
.voyager-watermark::before { content: "▸ "; color: var(--accent); }

/* ---------- 10. Filter empty state ---------- */
.filter-empty {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: var(--sp-3);
  color: var(--text-secondary); text-align: center;
  padding: var(--sp-5);
}
.filter-empty .fe-title {
  font-size: var(--fs-display); font-weight: var(--fw-display); color: var(--text-primary);
}
.filter-empty .fe-sub { font-size: var(--fs-body); max-width: 400px; }