/* ==========================================================================
   Design tokens — Neo-Classical Retro / Film-Stock system
   Marble & ivory surfaces, muted terracotta/olive/brass accents, serif
   display type, grain + vignette + halation instead of neon glow.
   ========================================================================== */

:root {
  /* --- Surface & ink (light / default — marble gallery) --- */
  --surface-0: #efe9dd;        /* ivory marble base */
  --surface-1: #f6f2e8;        /* raised card surface */
  --surface-2: #e5ddc9;        /* recessed / hairline fill */
  --ink-0: #211d1a;            /* primary text — near-black warm */
  --ink-1: #4a423a;            /* secondary text */
  --ink-2: #71685b;            /* tertiary / meta text — darkened for 4.5:1 at small sizes, see Phase 6 */
  --border-hairline: rgba(33, 29, 26, 0.14);
  --border-hairline-strong: rgba(33, 29, 26, 0.24);

  /* --- Accents (muted retro, not neon) --- */
  --accent-terracotta: #b5502e;
  --accent-terracotta-soft: rgba(181, 80, 46, 0.14);
  --accent-olive: #6e7350;
  --accent-olive-soft: rgba(110, 115, 80, 0.14);
  --accent-brass: #b08d3e;
  --accent-brass-soft: rgba(176, 141, 62, 0.16);

  /* --- Text-safe accent variants ---
     The raw accents above are tuned for large/decorative use (buttons,
     borders, dots) and don't all clear 4.5:1 at the small sizes text
     actually renders at (fs-micro/fs-small). Use these `-text` tokens
     anywhere an accent colors *small runnning text* (links, eyebrows,
     pill labels, active tab labels) — verified >=4.5:1 against both
     surface-0 and surface-1 in each theme. See PHASE.md Phase 6. */
  --accent-terracotta-text: #ab4b2b;
  --accent-olive-text: #686c4b;
  --accent-brass-text: #7c642c;

  /* Fixed dark ink for text sitting on a solid accent-colored fill
     (e.g. the brass "pressed" viewport button) — intentionally NOT a
     theme-flipping token, since the accent fills themselves don't flip
     between light/dark and white text on brass fails contrast (2.9:1). */
  --ink-on-accent: #211d1a;

  /* --- Status (kept muted, same family) --- */
  --status-live: var(--accent-olive);
  --status-preview: var(--accent-brass);
  --status-simulated: var(--accent-terracotta);

  /* --- Typography --- */
  --font-display: "Playfair Display", "Iowan Old Style", "Georgia", serif;
  --font-body: "Space Grotesk", "Inter", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --fs-hero: clamp(2.5rem, 5vw + 1rem, 4.5rem);
  --fs-h1: clamp(1.9rem, 2.4vw + 1rem, 2.75rem);
  --fs-h2: clamp(1.4rem, 1.2vw + 1rem, 1.9rem);
  --fs-h3: 1.15rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-micro: 0.75rem;

  /* --- Spacing scale --- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;

  /* --- Shape & elevation --- */
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;
  --shadow-tablet: 0 1px 2px rgba(33, 29, 26, 0.06), 0 8px 24px -12px rgba(33, 29, 26, 0.18);
  --shadow-tablet-hover: 0 2px 4px rgba(33, 29, 26, 0.08), 0 16px 36px -14px rgba(33, 29, 26, 0.26);

  /* --- Halation (hover highlight, warm bloom instead of neon glow) --- */
  --halation-terracotta: 0 0 0 1px rgba(181, 80, 46, 0.35), 0 0 24px -4px rgba(181, 80, 46, 0.45);
  --halation-brass: 0 0 0 1px rgba(176, 141, 62, 0.35), 0 0 24px -4px rgba(176, 141, 62, 0.45);

  /* --- Motion --- */
  --ease-film: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 140ms;
  --dur-base: 240ms;

  color-scheme: light;
}

/* --- Dark variant: "unlit gallery" — same warm cast, not OLED black --- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --surface-0: #211d1a;
    --surface-1: #292420;
    --surface-2: #35302a;
    --ink-0: #f2ece0;
    --ink-1: #cfc6b6;
    --ink-2: #9a9184;
    --border-hairline: rgba(242, 236, 224, 0.12);
    --border-hairline-strong: rgba(242, 236, 224, 0.2);
    --shadow-tablet: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -12px rgba(0, 0, 0, 0.5);
    --shadow-tablet-hover: 0 2px 4px rgba(0, 0, 0, 0.35), 0 16px 36px -14px rgba(0, 0, 0, 0.6);
    --accent-terracotta-text: #d37150;
    --accent-olive-text: #909669;
    --accent-brass-text: #bd9742;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --surface-0: #211d1a;
  --surface-1: #292420;
  --surface-2: #35302a;
  --ink-0: #f2ece0;
  --ink-1: #cfc6b6;
  --ink-2: #9a9184;
  --border-hairline: rgba(242, 236, 224, 0.12);
  --border-hairline-strong: rgba(242, 236, 224, 0.2);
  --shadow-tablet: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -12px rgba(0, 0, 0, 0.5);
  --shadow-tablet-hover: 0 2px 4px rgba(0, 0, 0, 0.35), 0 16px 36px -14px rgba(0, 0, 0, 0.6);
  --accent-terracotta-text: #d37150;
  --accent-olive-text: #909669;
  --accent-brass-text: #bd9742;
  color-scheme: dark;
}

/* ==========================================================================
   Reset
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--surface-0);
  color: var(--ink-0);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
}

img,
svg,
video {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 var(--space-3);
  letter-spacing: -0.01em;
}

h1 {
  font-size: var(--fs-h1);
}
h2 {
  font-size: var(--fs-h2);
}
h3 {
  font-size: var(--fs-h3);
}

p {
  margin: 0 0 var(--space-4);
  color: var(--ink-1);
}

code,
pre,
kbd {
  font-family: var(--font-mono);
}

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

:focus-visible {
  outline: 2px solid var(--accent-terracotta);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skip link: off-screen until focused, then becomes a visible, findable
   button pinned to the top of the viewport (unlike .visually-hidden,
   which — correctly — never reappears; a skip link must). */
.skip-link {
  position: absolute;
  top: -3rem;
  left: var(--space-4);
  z-index: 200;
  background: var(--ink-0);
  color: var(--surface-0);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: var(--fs-small);
  font-weight: 600;
  transition: top var(--dur-fast) var(--ease-film);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ==========================================================================
   Film-stock texture layer — grain + vignette
   ========================================================================== */

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    transparent 55%,
    rgba(33, 29, 26, 0.1) 100%
  );
}

#app {
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Layout primitives
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.section {
  padding-block: var(--space-8);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-terracotta-text);
}

.hr-hairline {
  border: none;
  border-top: 1px solid var(--border-hairline);
  margin: var(--space-6) 0;
}