/* tanso.center -- surreal carbon dreamscape */
:root {
  --burgundy: #5c1a2a;
  --cream: #f0e4d4;
  --leather: #8a5a3a;
  --gold: #c4a050;
  --ash-rose: #b87a7a;
  --dark-blood: #3a1018;
  --parchment: #e8dcc8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--burgundy);
  color: var(--cream);
  font-family: "Newsreader", Georgia, serif;
  font-weight: 400;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
  overflow-x: hidden;
}

.surreal-stage {
  position: relative;
  width: 100%;
  min-height: 100vh;
}

/* Retro 1960s scientific pattern -- hexagonal grid at low opacity */
.retro-pattern {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.06;
  background-image:
    radial-gradient(circle at 50% 50%, var(--cream) 1.2px, transparent 1.4px),
    linear-gradient(60deg, transparent 49%, var(--cream) 49.5%, var(--cream) 50.5%, transparent 51%),
    linear-gradient(-60deg, transparent 49%, var(--cream) 49.5%, var(--cream) 50.5%, transparent 51%);
  background-size: 36px 36px, 72px 124px, 72px 124px;
}
.retro-pattern.alt {
  opacity: 0.08;
  background-image:
    repeating-linear-gradient(0deg, var(--gold) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(90deg, var(--gold) 0 1px, transparent 1px 28px),
    radial-gradient(circle at 25% 25%, var(--ash-rose) 1.5px, transparent 1.7px);
  background-size: 28px 28px, 28px 28px, 56px 56px;
}

/* ===== Opening ===== */
.opening {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: grid;
  grid-template-rows: 1fr auto;
  align-items: end;
  padding: 0 6vw 6vh;
}

.melting-title {
  position: relative;
  font-family: "Instrument Serif", "Newsreader", Georgia, serif;
  font-weight: 400;
  font-size: clamp(80px, 22vw, 280px);
  line-height: 0.9;
  color: var(--cream);
  letter-spacing: -0.02em;
  align-self: center;
  user-select: none;
}
.melting-title .letter {
  display: inline-block;
  transform-origin: top center;
  opacity: 0;
  transform: translateY(-30px) skewY(0deg);
  transition: opacity 700ms ease, transform 900ms cubic-bezier(.2,.7,.2,1);
}
.melting-title.in .letter:nth-child(1) { opacity: 1; transform: translateY(0) skewY(0deg);   transition-delay: 80ms; }
.melting-title.in .letter:nth-child(2) { opacity: 1; transform: translateY(2px) skewY(1.2deg); transition-delay: 220ms; }
.melting-title.in .letter:nth-child(3) { opacity: 1; transform: translateY(5px) skewY(2.4deg); transition-delay: 360ms; }
.melting-title.in .letter:nth-child(4) { opacity: 1; transform: translateY(9px) skewY(3.6deg); transition-delay: 500ms; }
.melting-title.in .letter:nth-child(5) { opacity: 1; transform: translateY(14px) skewY(5deg);  transition-delay: 640ms; }

.cream-panel {
  position: relative;
  background: var(--cream);
  color: var(--burgundy);
  padding: 32px 40px;
  border: 1px solid var(--leather);
  box-shadow: 0 24px 60px rgba(58,16,24,0.6), inset 0 0 60px rgba(138,90,58,0.12);
  transform: translateY(120%);
  opacity: 0;
  transition: transform 1100ms cubic-bezier(.2,.7,.2,1) 700ms, opacity 900ms ease 700ms;
  max-width: 720px;
  width: 100%;
  justify-self: end;
}
.cream-panel.in {
  transform: translateY(0);
  opacity: 1;
}
.formula {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--leather);
  margin-bottom: 8px;
}
.panel-sub {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--burgundy);
  line-height: 1;
  margin-bottom: 14px;
}
.panel-meta {
  font-family: "Newsreader", serif;
  font-style: italic;
  color: var(--leather);
  font-size: 17px;
}

/* ===== Card grid ===== */
.card-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 28px;
  padding: 14vh 6vw;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(196,160,80,0.08), transparent 55%),
    radial-gradient(ellipse at 80% 85%, rgba(184,122,122,0.07), transparent 55%),
    var(--burgundy);
}

.leather-card {
  grid-column: span 4;
  position: relative;
  padding: 36px 32px 32px;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(255,235,210,0.10), transparent 55%),
    radial-gradient(circle at 70% 80%, rgba(58,16,24,0.18), transparent 60%),
    repeating-radial-gradient(circle at 30% 40%, rgba(58,16,24,0.05) 0 1px, transparent 1px 3px),
    repeating-radial-gradient(circle at 65% 70%, rgba(255,235,210,0.04) 0 1px, transparent 1px 4px),
    linear-gradient(135deg, #f4e9d8, #e8dcc8 60%, #d8c8b0);
  color: var(--burgundy);
  border: 1px solid var(--leather);
  box-shadow:
    0 16px 38px rgba(26,6,10,0.5),
    inset 0 0 40px rgba(138,90,58,0.18),
    inset 0 0 0 4px rgba(196,160,80,0.18);
  border-radius: 2px;
  transform: rotate(0deg) translateY(40px);
  opacity: 0;
  transition: transform 800ms cubic-bezier(.2,.7,.2,1), opacity 700ms ease, box-shadow 400ms ease;
}
.leather-card.in {
  opacity: 1;
}
.leather-card:hover {
  box-shadow:
    0 22px 46px rgba(26,6,10,0.6),
    inset 0 0 50px rgba(138,90,58,0.25),
    inset 0 0 0 4px rgba(196,160,80,0.32);
}

.leather-card.wide { grid-column: span 8; }
.leather-card.tall { grid-column: span 4; grid-row: span 2; }

@media (max-width: 900px) {
  .leather-card,
  .leather-card.wide,
  .leather-card.tall { grid-column: span 12; grid-row: auto; }
}

.card-tag {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--leather);
  display: inline-block;
  margin-bottom: 18px;
}
.card-head {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(26px, 2.6vw, 38px);
  line-height: 1.05;
  color: var(--dark-blood);
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}
.card-body {
  font-size: 16px;
  line-height: 1.75;
  color: var(--burgundy);
  margin-bottom: 14px;
}
.card-body.alt {
  font-style: italic;
  color: var(--leather);
}

.reaction-list {
  list-style: none;
  margin-bottom: 18px;
}
.reaction-list li {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13.5px;
  color: var(--burgundy);
  padding: 10px 0;
  border-bottom: 1px dashed rgba(138,90,58,0.4);
  letter-spacing: 0.02em;
}
.reaction-list li:last-child { border-bottom: none; }

/* Underline-draw link */
.under-link {
  display: inline-block;
  position: relative;
  color: var(--leather);
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  background-image: linear-gradient(var(--gold), var(--gold));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 2px;
  transition: background-size 320ms ease, color 280ms ease;
  padding-bottom: 4px;
}
.under-link:hover {
  background-size: 100% 2px;
  color: var(--dark-blood);
}

/* ===== Closing ===== */
.closing {
  position: relative;
  padding: 18vh 6vw 14vh;
  text-align: center;
  background: var(--dark-blood);
  border-top: 1px solid rgba(138,90,58,0.4);
}
.closing-tag {
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 11px;
  color: var(--ash-rose);
  margin-bottom: 26px;
}
.closing-title {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  font-size: clamp(54px, 11vw, 160px);
  line-height: 1;
  color: var(--cream);
  letter-spacing: -0.02em;
  display: inline-block;
  transform-origin: center;
  transform: skewY(0deg);
  transition: transform 600ms ease;
}
.closing-title .dot { color: var(--gold); }
.closing-title:hover { transform: skewY(2deg); }
.closing-meta {
  margin-top: 26px;
  font-family: "Newsreader", serif;
  font-style: italic;
  color: var(--ash-rose);
  font-size: 14px;
}