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

:root {
  --obsidian-folio: #0A0E14;
  --midnight-vellum: #141B27;
  --slate-archive: #1E2A3A;
  --silver-manuscript: #C8D0DB;
  --frost-cipher: #7BA8C4;
  --verdant-tendril: #4A9E7A;
  --amber-foxing: #C9943A;
  --parchment-whisper: #E8E0D4;
  --glass-edge: rgba(200, 210, 225, 0.08);
  --fs-display: clamp(2rem, 5vw + 0.5rem, 4.8rem);
  --fs-h2: clamp(1.3rem, 2.5vw + 0.3rem, 2.2rem);
  --fs-h3: clamp(1.1rem, 1.8vw + 0.3rem, 1.5rem);
  --fs-body: clamp(0.9rem, 1vw + 0.4rem, 1.05rem);
  --fs-small: clamp(0.75rem, 0.8vw + 0.3rem, 0.85rem);
  --fs-mono: clamp(0.72rem, 0.7vw + 0.28rem, 0.82rem);
  --font-display: 'Cormorant Garamond', serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--obsidian-folio);
  color: var(--silver-manuscript);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--fs-body);
  line-height: 1.65;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

.svg-defs { position: absolute; width: 0; height: 0; }

/* === NOISE OVERLAY === */
.noise-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  filter: url(#noise);
  opacity: 0.03;
  mix-blend-mode: overlay;
  pointer-events: none;
  z-index: 1;
}

/* === DEPTH GRADIENT === */
.depth-gradient {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: linear-gradient(to bottom, transparent 40%, rgba(6,10,15,0.6) 100%);
  pointer-events: none;
  z-index: 0;
}

/* === CONSTELLATION === */
.constellation {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100vh;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  animation: constellation-fade 1.2s 0.4s ease-out forwards;
}

@keyframes constellation-fade {
  to { opacity: 0.4; }
}

.constellation-svg {
  width: 100%;
  height: 100%;
  animation: constellation-rotate 120s linear infinite;
  transform-origin: center center;
}

@keyframes constellation-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* === VINE OVERLAY === */
.vine-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 5;
}

/* === CARD GRID === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: clamp(1.5rem, 3vw, 3rem);
  max-width: 1200px;
  margin: 0 auto;
  padding: 10vh 2rem 20vh;
  position: relative;
  z-index: 2;
}

/* === CARD BASE === */
.card {
  background: var(--glass-edge);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  box-shadow:
    inset 0 0 0 1px rgba(200, 210, 225, 0.12),
    0 8px 32px rgba(10, 14, 20, 0.5);
  border-radius: 4px;
  padding: 2rem;
  position: relative;
  transition: transform 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 300ms ease;
}

.card:hover {
  transform: translateY(-4px) scale(1.015);
  box-shadow:
    inset 0 0 0 1px rgba(200, 210, 225, 0.25),
    0 12px 40px rgba(10, 14, 20, 0.6);
}

/* Fallback for no backdrop-filter */
@supports not (backdrop-filter: blur(16px)) {
  .card {
    background: rgba(30, 42, 58, 0.95);
  }
}

/* === CARD VARIANTS === */
.card-wide {
  grid-column: span 2;
}

.card-rotate-neg {
  transform: rotate(-1.5deg) translateY(-12px);
}
.card-rotate-neg:hover {
  transform: rotate(-1.5deg) translateY(-16px) scale(1.015);
}

.card-rotate-pos {
  transform: rotate(1.5deg);
}
.card-rotate-pos:hover {
  transform: rotate(1.5deg) translateY(-4px) scale(1.015);
}

.card-deep {
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
}

.card-fade-out {
  -webkit-mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
  mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
}

/* === REVEAL ANIMATION === */
.card-reveal {
  opacity: 0;
  transform: translateY(24px) scale(0.97);
  transition: opacity 500ms ease-out, transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--stagger, 0) * 80ms);
  will-change: transform, opacity;
}

.card-reveal.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.card-reveal.card-rotate-neg.visible {
  transform: rotate(-1.5deg) translateY(-12px) scale(1);
}

.card-reveal.card-rotate-pos.visible {
  transform: rotate(1.5deg) scale(1);
}

/* === ISO ICONS === */
.iso-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  transition: filter 300ms ease;
}

.card:hover .iso-icon {
  filter: drop-shadow(0 2px 8px rgba(123, 168, 196, 0.3));
}

/* === TYPOGRAPHY === */
.title-main {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-display);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--parchment-whisper);
  margin-bottom: 0.5rem;
}

.title-tagline {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--fs-small);
  color: rgba(200, 208, 219, 0.5);
}

.card-heading {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h2);
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--silver-manuscript);
  margin-bottom: 0.75rem;
}

.card-body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--fs-body);
  line-height: 1.65;
  color: rgba(200, 208, 219, 0.88);
}

.card-quote {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: var(--fs-h3);
  line-height: 1.4;
  color: var(--frost-cipher);
  margin-bottom: 0.75rem;
}

.card-attribution {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: var(--fs-small);
  color: rgba(200, 208, 219, 0.5);
}

.card-meta {
  margin-top: 1.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(200, 210, 225, 0.08);
}

.mono-label {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(196, 149, 58, 0.7);
  margin-right: 0.5rem;
}

.mono-value {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--frost-cipher);
}

.closing-text {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-h3);
  color: rgba(200, 208, 219, 0.6);
  font-style: italic;
}

/* === RESPONSIVE === */
@media (max-width: 1200px) {
  .card-wide { grid-column: span 2; }
  .card-rotate-neg { transform: rotate(-0.5deg); }
  .card-rotate-pos { transform: rotate(0.5deg); }
  .card-reveal.card-rotate-neg.visible { transform: rotate(-0.5deg) scale(1); }
  .card-reveal.card-rotate-pos.visible { transform: rotate(0.5deg) scale(1); }
}

@media (max-width: 768px) {
  .card-grid {
    grid-template-columns: 1fr;
    padding: 6vh 0.75rem 15vh;
    gap: 1rem;
  }
  .card-wide { grid-column: span 1; }
  .card-rotate-neg,
  .card-rotate-pos {
    transform: none;
  }
  .card-reveal.card-rotate-neg.visible,
  .card-reveal.card-rotate-pos.visible {
    transform: translateY(0) scale(1);
  }
  .iso-icon { width: 36px; height: 36px; }
  .card { padding: 1.5rem; }
}