/* ============================================================
   CC × AIVITA — design tokens + component + layout + keyframes
   Two-theme system: "warm" (Clinical Warm, default 02–09) and
   dark bookends ("dark-cool" = 01, "dark-warm" = 10).
   See docs/GLOBAL-INSTRUCTIONS.md §4.
   ============================================================ */

:root {
  /* Typography (theme-independent) */
  --font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Courier New", monospace;

  /* Fluid type scale */
  --size-kicker: clamp(0.75rem, 0.95vw, 0.95rem);
  --size-body: clamp(1.1rem, 1.6vw, 1.6rem);
  --size-body-sm: clamp(0.95rem, 1.15vw, 1.2rem);
  --size-h2: clamp(1.8rem, 3.2vw, 3rem);
  --size-h1: clamp(2.5rem, 6vw, 6rem);
  --size-number: clamp(3rem, 6vw, 6rem);

  /* Safe area */
  --safe-x: 5vw;
  --safe-y: 6vh;

  /* Transitions */
  --t-fast: 220ms;
  --t-med: 450ms;
  --t-slow: 650ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --theme-wash: 550ms;
}

/* ============================================================
   THEME: warm — Clinical Warm (DEFAULT, slides 02–09)
   Depth from soft shadows + hairlines. No glass-blur, no glow.
   ============================================================ */
:root,
[data-theme="warm"] {
  --bg: #faf9f6;
  --bg-image: none;
  --panel-bg: #ffffff;
  --panel-border: #ece9e3;
  --text-1: #1a1a1a;
  --text-2: #6b6b6b;
  --accent: #0e7c6b;
  --data-teal: #0e7c6b;
  --data-amber: #c8791f;
  --data-coral: #c15a3a;
  --data-rose: #b76e56;
  --baseline-band: rgba(14, 124, 107, 0.1);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 30px -12px rgba(0, 0, 0, 0.18);
  --surface-blur: none;
  --grain-opacity: 0.02;
}

/* ============================================================
   THEME: dark-cool — bookend, slide 01 (opener). Cool teal glow.
   ============================================================ */
[data-theme="dark-cool"] {
  --bg: #06100e;
  --bg-image: radial-gradient(120% 120% at 50% 20%, #04211d 0%, #06100e 70%);
  --panel-bg: rgba(255, 255, 255, 0.06);
  --panel-border: rgba(127, 224, 208, 0.25);
  --text-1: #eaf4f1;
  --text-2: #9fbeb7;
  --accent: #3fd9c6;
  --data-teal: #3fd9c6;
  --data-amber: #e4a94c;
  --data-coral: #e5765a;
  --data-rose: #d9a88a;
  --baseline-band: rgba(63, 217, 198, 0.14);
  --shadow-sm: none;
  --shadow-lg: none;
  --surface-blur: 14px;
  --grain-opacity: 0.035;
}

/* ============================================================
   THEME: dark-warm — bookend, slide 10 (closer). Rose-gold/amber glow.
   ============================================================ */
[data-theme="dark-warm"] {
  --bg: #06100e;
  --bg-image: radial-gradient(120% 120% at 50% 20%, #04211d 0%, #06100e 70%);
  --panel-bg: rgba(255, 255, 255, 0.06);
  --panel-border: rgba(217, 168, 138, 0.28);
  --text-1: #eaf4f1;
  --text-2: #9fbeb7;
  --accent: #d9a88a;
  --data-teal: #3fd9c6;
  --data-amber: #e4a94c;
  --data-coral: #e5765a;
  --data-rose: #d9a88a;
  --baseline-band: rgba(217, 168, 138, 0.14);
  --shadow-sm: none;
  --shadow-lg: none;
  --surface-blur: 14px;
  --grain-opacity: 0.035;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  color: var(--text-1);
  letter-spacing: -0.01em;
  background: var(--bg);
  transition: background var(--t-slow) ease;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

/* ---------- Stage ---------- */

#stage {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: var(--bg-image), var(--bg);
  background-color: var(--bg);
}

.slide {
  position: absolute;
  inset: 0;
  width: 100vw;
  height: 100vh;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.slide.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.slide-safe {
  position: relative;
  width: 100%;
  height: 100%;
  padding: var(--safe-y) var(--safe-x);
  display: flex;
  flex-direction: column;
  z-index: 2;
}

/* ---------- Theme wash overlay (bookend transitions, §4.6) ---------- */

#theme-wash {
  position: fixed;
  inset: 0;
  z-index: 55;
  opacity: 0;
  pointer-events: none;
  background: var(--bg-image), var(--bg);
  background-color: var(--bg);
}

/* ---------- Grain overlay ---------- */

#grain {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  opacity: var(--grain-opacity);
  mix-blend-mode: overlay;
  transition: opacity var(--t-slow) ease;
}

/* ---------- Typography helpers ---------- */

.kicker {
  font-family: var(--font-mono);
  font-size: var(--size-kicker);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.85;
}

.title-display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--size-h1);
  line-height: 1.04;
  color: var(--text-1);
  letter-spacing: -0.01em;
}

.title-sub {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--size-h2);
  color: var(--text-2);
}

.body-text {
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: 1.5;
  color: var(--text-2);
}

.mono-label {
  font-family: var(--font-mono);
  font-size: var(--size-body-sm);
  letter-spacing: 0.08em;
  color: var(--text-2);
}

.tabular {
  font-variant-numeric: tabular-nums;
}

/* Glow is a dark-bookend-only effect — no-ops visually on warm via 0 spread */
.is-dark .glow-accent {
  text-shadow: 0 0 24px color-mix(in srgb, var(--accent) 55%, transparent);
}

/* ---------- Glass / panel surface (theme-conditional) ---------- */

.surface {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
}

.is-dark .surface {
  backdrop-filter: blur(var(--surface-blur));
  -webkit-backdrop-filter: blur(var(--surface-blur));
}

/* ---------- Media slot placeholder ---------- */

.media-slot {
  position: relative;
  background: var(--panel-bg);
  border: 1.5px dashed var(--panel-border);
  border-radius: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.5rem;
  text-align: center;
  color: var(--text-2);
  box-shadow: var(--shadow-sm);
}

.media-slot::before,
.media-slot::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--accent);
  border-style: solid;
  opacity: 0.6;
}

.media-slot::before {
  top: 8px;
  left: 8px;
  border-width: 1.5px 0 0 1.5px;
}

.media-slot::after {
  bottom: 8px;
  right: 8px;
  border-width: 0 1.5px 1.5px 0;
}

.media-slot .slot-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.media-slot .slot-desc {
  font-size: 0.9rem;
  max-width: 32ch;
  opacity: 0.8;
}

/* ---------- Step visibility ---------- */

.step {
  opacity: 0;
  transform: translateY(18px);
  will-change: transform, opacity;
}

.step.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Ambient field canvas (dark bookends only by default) ---------- */

#field-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
}

/* ---------- Progress rail / chrome ---------- */

#chrome {
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
}

#watermark {
  position: absolute;
  bottom: var(--safe-y);
  left: var(--safe-x);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: #9a9a9a;
  opacity: 0.85;
  pointer-events: none;
  white-space: nowrap;
}

#progress-rail {
  position: absolute;
  right: var(--safe-x);
  bottom: var(--safe-y);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--text-2);
}

#progress-rail .slide-count {
  opacity: 0.7;
}

#step-pips {
  display: flex;
  gap: 0.4rem;
}

.step-pip {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--text-2) 35%, transparent);
  transition: background var(--t-fast) ease, box-shadow var(--t-fast) ease;
}

.step-pip.is-done {
  background: var(--accent);
}

.is-dark .step-pip.is-done {
  box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 70%, transparent);
}

#top-chrome-right {
  position: absolute;
  top: var(--safe-y);
  right: var(--safe-x);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.6rem;
  pointer-events: none;
}

#slide-hints {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  pointer-events: none;
}

#next-hint,
#prev-hint {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--text-2);
  opacity: 0.18;
  transition: opacity var(--t-med) ease;
  pointer-events: auto;
  cursor: pointer;
}

#next-hint.is-visible,
#prev-hint.is-visible {
  opacity: 0.75;
}

/* ---------- Slide-picker menu (top right) ---------- */

#slide-nav {
  position: relative;
  pointer-events: auto;
}

#slide-nav-trigger {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-2);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  opacity: 0.55;
  box-shadow: var(--shadow-sm);
  transition: opacity 250ms ease, border-color 250ms ease, color 250ms ease;
}

#slide-nav-trigger:hover,
#slide-nav.is-open #slide-nav-trigger {
  opacity: 1;
  border-color: var(--accent);
  color: var(--accent);
}

#slide-nav-menu {
  position: absolute;
  top: calc(100% + 0.6rem);
  right: 0;
  min-width: 260px;
  max-height: 64vh;
  overflow-y: auto;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 0.8rem;
  box-shadow: var(--shadow-lg);
  padding: 0.4rem;
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  pointer-events: none;
  transition: opacity 200ms ease, transform 200ms ease;
}

.is-dark #slide-nav-menu {
  backdrop-filter: blur(var(--surface-blur));
  -webkit-backdrop-filter: blur(var(--surface-blur));
}

#slide-nav.is-open #slide-nav-menu {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.slide-nav-item {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  padding: 0.55rem 0.7rem;
  border-radius: 0.5rem;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text-1);
  transition: background 150ms ease;
}

.slide-nav-item:hover {
  background: var(--bg);
}

.slide-nav-item.is-current {
  color: var(--accent);
  font-weight: 600;
}

.slide-nav-item .n {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-2);
  width: 2.4ch;
  flex-shrink: 0;
}

/* ---------- Overview grid ---------- */

#overview {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: var(--bg);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 6vh 6vw;
}

#overview.is-open {
  display: flex;
}

#overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  width: 100%;
  max-width: 1600px;
}

.overview-card {
  aspect-ratio: 16 / 9;
  border-radius: 0.75rem;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1rem;
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease-out), border-color var(--t-fast) ease;
}

.overview-card:hover,
.overview-card.is-current {
  transform: scale(1.03);
  border-color: var(--accent);
}

.overview-card .n {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  opacity: 0.8;
}

.overview-card .t {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text-1);
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  .step {
    transition: none !important;
  }
}

.reduced-motion .step {
  transform: none;
}