/* ==========================================================
   Basalt — skeuomorphic revision
   "The Geologist's Field Station"
   Fraunces · Source Serif 4 · DM Mono

   Surfaces have weight. Materials teach through feel.
   Objects arrive, settle, respond.
   ========================================================== */

:root {
  color-scheme: dark light;

  /* Desk — dark walnut */
  --desk: oklch(0.28 0.04 55);
  --desk-grain: oklch(0.26 0.035 52);
  --desk-light: oklch(0.32 0.045 58);

  /* Paper — warm ivory */
  --paper: oklch(0.94 0.012 80);
  --paper-shadow: oklch(0.88 0.015 75);
  --ink: oklch(0.22 0.03 55);
  --ink-dim: oklch(0.48 0.02 55);

  /* Brass */
  --brass-hi: oklch(0.76 0.09 85);
  --brass: oklch(0.65 0.12 80);
  --brass-lo: oklch(0.48 0.10 72);
  --brass-text: oklch(0.24 0.06 65);

  /* Strata — dark slate blue-gray */
  --strata: oklch(0.22 0.03 248);
  --strata-hi: oklch(0.28 0.035 250);
  --strata-vein: oklch(0.50 0.04 245);

  /* Felt — very dark charcoal-blue */
  --felt: oklch(0.18 0.02 258);
  --felt-dark: oklch(0.14 0.018 255);

  /* Accents */
  --walnut-ink: oklch(0.55 0.06 55);
  --wax: oklch(0.36 0.17 22);
  --wax-hi: oklch(0.44 0.15 28);
  --tape: oklch(0.93 0.03 90 / 0.50);
  --coffee: oklch(0.32 0.05 58 / 0.08);

  /* Fonts */
  --font-display: 'Fraunces', 'Georgia', serif;
  --font-body: 'Source Serif 4', 'Georgia', serif;
  --font-mono: 'DM Mono', 'Menlo', monospace;

  /* Paper noise tile */
  --paper-noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");

  /* Stamp grunge mask */
  --stamp-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.035' numOctaves='5'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 -1.8 1.4'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)'/%3E%3C/svg%3E");

  /* Basalt rock noise — fine-grained volcanic texture */
  --basalt-noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.8' numOctaves='6' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.09'/%3E%3C/svg%3E");

  /* Timing */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-settle: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

img { display: block; max-width: 100%; height: auto; }
figure, blockquote { margin: 0; }
hr { border: none; }

/* --------------------------------------------------------
   Wood grain desk — the foundation
   6 gradient layers at near-vertical angles.
   Prime-width stripes → organic non-repetition.
-------------------------------------------------------- */
body {
  background-color: var(--desk);
  background-image:
    /* fine grain */
    repeating-linear-gradient(
      87deg,
      transparent 0 2px,
      oklch(0.26 0.035 52 / 0.35) 2px 3px
    ),
    /* medium grain */
    repeating-linear-gradient(
      88.5deg,
      transparent 0 7px,
      oklch(0.31 0.04 58 / 0.12) 7px 9px
    ),
    /* wide grain — color banding */
    repeating-linear-gradient(
      86deg,
      transparent 0 23px,
      oklch(0.24 0.03 50 / 0.18) 23px 27px
    ),
    /* slow color variation */
    repeating-linear-gradient(
      89deg,
      oklch(0.28 0.04 55 / 0) 0 41px,
      oklch(0.31 0.045 60 / 0.12) 41px 83px
    ),
    /* knot suggestion */
    radial-gradient(ellipse 60px 200px at 75% 30%, oklch(0.24 0.05 48 / 0.2) 0%, transparent 70%),
    radial-gradient(ellipse 40px 160px at 20% 70%, oklch(0.30 0.04 62 / 0.15) 0%, transparent 70%);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  font-weight: 400;
  line-height: 1.7;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
}

/* --------------------------------------------------------
   Desk lamp vignette + dust motes
-------------------------------------------------------- */
.vignette {
  position: fixed;
  inset: 0;
  background: radial-gradient(
    ellipse 80% 70% at 50% 10%,
    transparent 30%,
    oklch(0 0 0 / 0.25) 100%
  );
  pointer-events: none;
  z-index: 100;
}

/* Dust motes drifting in the lamplight */
.vignette::before,
.vignette::after {
  content: '';
  position: fixed;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: oklch(0.85 0.02 80 / 0.25);
  animation: dust-drift 22s ease-in-out infinite;
}

.vignette::before {
  top: 18%;
  left: 38%;
  animation-delay: -8s;
  animation-duration: 26s;
}

.vignette::after {
  top: 35%;
  left: 62%;
  width: 2px;
  height: 2px;
  animation-delay: -15s;
  animation-duration: 19s;
}

@keyframes dust-drift {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0; }
  8% { opacity: 0.35; }
  50% { transform: translate(35px, -70px) scale(0.7); opacity: 0.2; }
  92% { opacity: 0; }
  100% { transform: translate(-15px, -110px) scale(0.5); }
}

/* --------------------------------------------------------
   Layout
-------------------------------------------------------- */
.desk {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 4vw, 3rem);
  position: relative;
}

/* --------------------------------------------------------
   Paper texture — shared by all .paper elements
   Cream base + SVG fractal noise tile
-------------------------------------------------------- */
.paper {
  background-color: var(--paper);
  background-image: var(--paper-noise);
  background-size: 300px 300px;
}

/* --------------------------------------------------------
   Brass plate — metallic gradient + machined edge
-------------------------------------------------------- */
.brass-plate {
  background: linear-gradient(
    180deg,
    var(--brass-hi) 0%,
    var(--brass) 35%,
    oklch(0.58 0.11 78) 65%,
    var(--brass-lo) 100%
  );
  box-shadow:
    inset 0 1px 0 oklch(0.82 0.07 88 / 0.6),
    inset 0 -1px 0 oklch(0.30 0.08 68 / 0.5),
    0 2px 6px oklch(0 0 0 / 0.35),
    0 1px 2px oklch(0 0 0 / 0.2);
}

/* --------------------------------------------------------
   Header
-------------------------------------------------------- */
.desk-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: clamp(1.5rem, 4vw, 2.5rem);
}

/* Basalt stone plate — real tholeiitic basalt photo + CSS overlays */
.desk-header .brass-plate {
  padding: 0.55em 1.4em;
  border-radius: 3px;
  background-color: oklch(0.14 0.01 230);
  background-image:
    /* Polished surface sheen — top highlight */
    linear-gradient(
      180deg,
      oklch(0.30 0.01 230 / 0.2) 0%,
      transparent 25%,
      transparent 80%,
      oklch(0.08 0.005 230 / 0.15) 100%
    ),
    /* Darken + desaturate overlay — mutes the lichen, deepens tone */
    linear-gradient(oklch(0.12 0.015 230 / 0.55), oklch(0.10 0.01 225 / 0.55)),
    /* Real basalt photo — tholeiitic, Mesoproterozoic, Minnesota */
    url('basalt-texture.jpg');
  background-size: 100% 100%, cover, cover;
  background-position: center, center, center;
  background-repeat: no-repeat;
  box-shadow:
    /* Polished stone edge catches light */
    inset 0 1px 0 oklch(0.32 0.015 220 / 0.55),
    inset 0 -1px 0 oklch(0.06 0.005 230 / 0.7),
    /* Chiseled edge highlight */
    inset 1px 0 0 oklch(0.28 0.012 225 / 0.3),
    inset -1px 0 0 oklch(0.08 0.005 235 / 0.35),
    /* Weight on the desk */
    0 3px 8px oklch(0 0 0 / 0.45),
    0 1px 2px oklch(0 0 0 / 0.3);
}

.logo-link {
  display: block;
  line-height: 0;
  filter:
    drop-shadow(0 1.5px 0.5px oklch(0.38 0.01 230 / 0.65))
    drop-shadow(0 -1px 0 oklch(0.04 0.005 230 / 0.7));
}

.logo {
  height: clamp(1.4rem, 1.2rem + 1vw, 2rem);
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.9;
  mix-blend-mode: screen;
  -webkit-mask-image: repeating-linear-gradient(
    72deg,
    black 0 3.5px, rgba(0,0,0,0.88) 3.5px 4px,
    black 4px 8px, rgba(0,0,0,0.5) 8px 8.5px,
    black 8.5px 14px, rgba(0,0,0,0.9) 14px 14.4px,
    black 14.4px 20px, rgba(0,0,0,0.85) 20px 20.5px,
    black 20.5px 26px
  );
  mask-image: repeating-linear-gradient(
    72deg,
    black 0 3.5px, rgba(0,0,0,0.88) 3.5px 4px,
    black 4px 8px, rgba(0,0,0,0.5) 8px 8.5px,
    black 8.5px 14px, rgba(0,0,0,0.9) 14px 14.4px,
    black 14.4px 20px, rgba(0,0,0,0.85) 20px 20.5px,
    black 20.5px 26px
  );
  transition: opacity 0.25s;
}

.logo:hover { opacity: 1; }

.leather-tag {
  background: var(--strata);
  padding: 0.35em 0.9em;
  border-radius: 2px;
  box-shadow:
    inset 0 1px 2px oklch(0 0 0 / 0.3),
    0 1px 0 oklch(0.32 0.03 248 / 0.3);
}

.tag-text {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--strata-vein);
  text-decoration: none;
  transition: color 0.2s;
}

.tag-text:hover { color: var(--brass); }

/* --------------------------------------------------------
   Hero — paper sheet on the desk
-------------------------------------------------------- */
.hero-area {
  padding-block: clamp(2rem, 6vw, 5rem) clamp(3rem, 8vw, 6rem);
}

.hero-sheet {
  position: relative;
  padding: clamp(2.5rem, 6vw, 4rem) clamp(2rem, 5vw, 3.5rem);
  transform: rotate(-0.4deg);
  box-shadow:
    0 1px 1px oklch(0 0 0 / 0.08),
    0 4px 8px oklch(0 0 0 / 0.12),
    0 12px 36px oklch(0 0 0 / 0.18),
    0 0 0 1px oklch(0 0 0 / 0.04),
    4px 4px 12px oklch(0 0 0 / 0.1);
  transition: transform 0.4s var(--ease-settle);
}

.hero-sheet:hover {
  transform: rotate(0deg);
}

/* Edge age tint — faint warm bloom around paper margins */
.hero-sheet::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    transparent 55%,
    oklch(0.86 0.025 70 / 0.2) 100%
  );
  pointer-events: none;
  z-index: 1;
}

/* Corner curl — paper lifting off the desk */
.hero-sheet::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 36px;
  height: 36px;
  background: linear-gradient(
    225deg,
    var(--desk) 0%,
    var(--desk) 42%,
    var(--paper-shadow) 48%,
    var(--paper) 65%
  );
  pointer-events: none;
  z-index: 2;
}

/* Specimen catalog number */
.specimen-id {
  position: absolute;
  top: clamp(0.8rem, 2vw, 1.2rem);
  right: clamp(1rem, 3vw, 1.8rem);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  color: oklch(0.62 0.03 55 / 0.5);
  z-index: 1;
}

/* Letterpress — pressed into the paper */
.letterpress {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.4rem + 3.2vw, 3.6rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 18ch;
  color: oklch(0.28 0.04 55);
  text-shadow:
    0 1px 0 oklch(0.97 0.008 80 / 0.9),
    0 -0.5px 0 oklch(0.18 0.03 50 / 0.2);
  position: relative;
  z-index: 1;
}

/* Typewriter text */
.typewriter {
  margin-top: clamp(1.2rem, 3vw, 2rem);
  font-family: var(--font-mono);
  font-size: clamp(0.72rem, 0.68rem + 0.2vw, 0.82rem);
  font-weight: 300;
  color: var(--ink-dim);
  letter-spacing: 0.04em;
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

/* Brass CTA button — light sweep on hover */
.brass-button {
  position: relative;
  overflow: hidden;
  display: inline-block;
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
  padding: 0.65em 1.8em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--brass-text);
  background: linear-gradient(
    180deg,
    var(--brass-hi) 0%,
    var(--brass) 40%,
    var(--brass-lo) 100%
  );
  border: 1px solid var(--brass-lo);
  border-radius: 3px;
  box-shadow:
    inset 0 1px 0 oklch(0.82 0.07 88 / 0.6),
    inset 0 -1px 0 oklch(0.30 0.08 68 / 0.4),
    0 2px 4px oklch(0 0 0 / 0.3),
    0 4px 12px oklch(0 0 0 / 0.15);
  text-shadow: 0 1px 0 oklch(0.82 0.07 88 / 0.4);
  transition: all 0.15s;
  cursor: pointer;
  z-index: 1;
}

/* Brass sheen sweep */
.brass-button::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 0%,
    transparent 35%,
    oklch(0.92 0.05 85 / 0.35) 45%,
    oklch(0.96 0.03 88 / 0.45) 50%,
    oklch(0.92 0.05 85 / 0.35) 55%,
    transparent 65%,
    transparent 100%
  );
  transform: translateX(-120%);
  transition: transform 0.55s ease;
  pointer-events: none;
}

.brass-button:hover::after {
  transform: translateX(120%);
}

.brass-button:hover {
  color: var(--brass-text);
  background: linear-gradient(
    180deg,
    var(--brass) 0%,
    var(--brass-hi) 50%,
    var(--brass) 100%
  );
  box-shadow:
    inset 0 1px 0 oklch(0.82 0.07 88 / 0.5),
    0 1px 2px oklch(0 0 0 / 0.25);
  transform: translateY(1px);
}

.brass-button:active {
  box-shadow:
    inset 0 2px 4px oklch(0 0 0 / 0.2),
    0 0 1px oklch(0 0 0 / 0.2);
  transform: translateY(2px);
}

/* Rubber stamp — uneven ink via SVG grunge mask */
.stamp {
  position: absolute;
  bottom: clamp(1.5rem, 4vw, 2.5rem);
  right: clamp(1.5rem, 4vw, 2.5rem);
  padding: 0.35em 0.9em;
  border: 2.5px solid var(--walnut-ink);
  border-radius: 3px;
  color: var(--walnut-ink);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transform: rotate(-7deg);
  opacity: 0.8;
  -webkit-mask-image: var(--stamp-mask);
  mask-image: var(--stamp-mask);
  -webkit-mask-size: 300px 300px;
  mask-size: 300px 300px;
  pointer-events: none;
  z-index: 1;
}

/* --------------------------------------------------------
   Strata separator — geological band with real basalt
   Layered gradients over basalt-texture.jpg.
   Pseudo-elements for mineral vein lines.
-------------------------------------------------------- */
.strata-strip {
  height: 32px;
  margin-block: clamp(0.5rem, 2vw, 1rem);
  position: relative;
  border-radius: 2px;
  overflow: hidden;
  background-color: var(--strata);
  background-image:
    linear-gradient(180deg,
      oklch(0.15 0.01 230) 0%,
      oklch(0.20 0.025 248) 20%,
      oklch(0.26 0.04 25 / 0.4) 24%,
      oklch(0.22 0.03 248) 28%,
      var(--strata) 45%,
      var(--strata) 65%,
      oklch(0.24 0.035 20 / 0.3) 69%,
      oklch(0.20 0.025 248) 73%,
      oklch(0.16 0.015 245) 100%
    ),
    /* Real basalt texture — barely visible through the gradient */
    linear-gradient(oklch(0.18 0.02 248 / 0.7), oklch(0.18 0.02 248 / 0.7)),
    url('basalt-texture.jpg');
  background-size: 100%, cover, cover;
  background-position: center, center, center 40%;
  box-shadow:
    inset 0 2px 4px oklch(0 0 0 / 0.3),
    inset 0 -1px 2px oklch(0.30 0.03 248 / 0.2),
    0 2px 4px oklch(0 0 0 / 0.2);
}

/* Mineral vein lines */
.strata-strip::before,
.strata-strip::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  height: 0;
  border-top: 1px solid oklch(0.40 0.05 55 / 0.25);
}

.strata-strip::before { top: 8px; }
.strata-strip::after { bottom: 8px; }

/* Rorschach — bilateral inkblot on the middle separator */
.strata-strip--rorschach::before {
  border-top: none;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  height: 100%;
  border-radius: 2px;
  background:
    radial-gradient(ellipse 18% 80% at 38% 50%, oklch(0.30 0.04 248 / 0.35) 0%, transparent 100%),
    radial-gradient(ellipse 18% 80% at 62% 50%, oklch(0.30 0.04 248 / 0.35) 0%, transparent 100%);
}

/* --------------------------------------------------------
   Polaroid — photo taped to the desk
-------------------------------------------------------- */
.showcase {
  padding-block: clamp(2rem, 6vw, 4rem);
  display: flex;
  justify-content: center;
}

.polaroid {
  position: relative;
  background: var(--paper);
  padding: 10px 10px 44px;
  max-width: 860px;
  width: 100%;
  transform: rotate(var(--pol-rot, 0deg));
  box-shadow:
    0 1px 1px oklch(0 0 0 / 0.08),
    0 4px 12px oklch(0 0 0 / 0.15),
    0 12px 40px oklch(0 0 0 / 0.2),
    0 0 0 1px oklch(0 0 0 / 0.03);
  transition:
    transform 0.5s var(--ease-settle),
    box-shadow 0.5s var(--ease-settle);
}

.polaroid:hover {
  transform: rotate(0deg) translateY(-3px);
  box-shadow:
    0 2px 2px oklch(0 0 0 / 0.06),
    0 8px 20px oklch(0 0 0 / 0.18),
    0 18px 50px oklch(0 0 0 / 0.22),
    0 0 0 1px oklch(0 0 0 / 0.04);
}

.polaroid-img {
  width: 100%;
  border: 1px solid oklch(0 0 0 / 0.06);
}

.polaroid-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 300;
  color: var(--ink-dim);
  letter-spacing: 0.03em;
  text-align: center;
  padding-inline: 8px;
}

/* Tape strips */
.tape {
  position: absolute;
  width: clamp(50px, 8vw, 75px);
  height: 22px;
  background: var(--tape);
  z-index: 2;
  /* Subtle wrinkle highlights */
  background-image:
    linear-gradient(90deg, transparent 38%, oklch(1 0 0 / 0.12) 40%, oklch(1 0 0 / 0.12) 42%, transparent 44%),
    linear-gradient(90deg, transparent 62%, oklch(1 0 0 / 0.08) 63%, oklch(1 0 0 / 0.08) 65%, transparent 67%);
  box-shadow: 0 1px 2px oklch(0 0 0 / 0.08);
}

.tape-left {
  top: -8px;
  left: clamp(20px, 5vw, 50px);
  transform: rotate(var(--tape-rot, -14deg));
}

.tape-right {
  top: -6px;
  right: clamp(30px, 6vw, 60px);
  transform: rotate(var(--tape-rot, 11deg));
}

/* --------------------------------------------------------
   Torn note — paper with ragged edge
-------------------------------------------------------- */
.interlude {
  padding-block: clamp(1.5rem, 4vw, 3rem);
  display: flex;
  justify-content: center;
}

.torn-note {
  position: relative;
  padding: clamp(2rem, 5vw, 3rem) clamp(2rem, 5vw, 3.5rem);
  max-width: 640px;
  width: 100%;
  /* Torn top edge */
  clip-path: polygon(
    0% 3%, 2% 0.5%, 4% 2.5%, 7% 0%, 10% 3%, 13% 1%, 16% 2.8%,
    19% 0.3%, 22% 2%, 25% 0.8%, 28% 3%, 31% 1.2%, 34% 0%, 37% 2.5%,
    40% 0.5%, 43% 3%, 46% 1%, 49% 2.5%, 52% 0%, 55% 2.8%, 58% 0.8%,
    61% 2%, 64% 0.3%, 67% 3%, 70% 1%, 73% 2.5%, 76% 0%, 79% 2.8%,
    82% 1.2%, 85% 0.5%, 88% 3%, 91% 1%, 94% 2.5%, 97% 0.5%, 100% 2%,
    100% 100%, 0% 100%
  );
  box-shadow:
    0 4px 12px oklch(0 0 0 / 0.15),
    0 12px 36px oklch(0 0 0 / 0.12);
}

.torn-bottom {
  clip-path: polygon(
    0% 0%, 100% 0%,
    100% 97%, 97% 99.5%, 94% 97.5%, 91% 99%, 88% 97%, 85% 99.5%,
    82% 98%, 79% 97.2%, 76% 100%, 73% 97.5%, 70% 99%, 67% 97%, 64% 99.8%,
    61% 98%, 58% 99.2%, 55% 97.2%, 52% 100%, 49% 97.5%, 46% 99%,
    43% 97%, 40% 99.5%, 37% 97.5%, 34% 100%, 31% 98%, 28% 97%,
    25% 99.2%, 22% 98%, 19% 99.8%, 16% 97.2%, 13% 99%, 10% 97%,
    7% 100%, 4% 97.5%, 2% 99.5%, 0% 97%
  );
}

.note-text {
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.3rem);
  line-height: 1.6;
  max-width: 40ch;
  color: var(--ink);
}

.note-text em {
  font-style: italic;
  color: oklch(0.38 0.08 240);
}

/* --------------------------------------------------------
   Specimen tray — felt-lined display case
-------------------------------------------------------- */
.cork-board {
  padding-block: clamp(2.5rem, 6vw, 5rem);
  background-color: var(--felt);
  background-image:
    /* fine fiber noise — high frequency felt texture */
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='2.5' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.06'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  margin-inline: clamp(-1.5rem, -4vw, -3rem);
  padding-inline: clamp(1.5rem, 4vw, 3rem);
  border-radius: 2px;
  box-shadow:
    inset 0 3px 10px oklch(0 0 0 / 0.4),
    inset 0 -3px 8px oklch(0 0 0 / 0.3),
    inset 3px 0 8px oklch(0 0 0 / 0.15),
    inset -3px 0 8px oklch(0 0 0 / 0.15),
    0 2px 4px oklch(0 0 0 / 0.15);
}

.cork-label-plate {
  display: inline-block;
  padding: 0.3em 1.2em;
  border-radius: 2px;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.cork-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brass-text);
  text-shadow: 0 1px 0 oklch(0.80 0.08 85 / 0.5);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.8rem, 4vw, 3rem);
}

/* --------------------------------------------------------
   Index card — resting on felt
-------------------------------------------------------- */
.index-card {
  position: relative;
  padding: clamp(2rem, 4vw, 2.8rem) clamp(1.5rem, 3vw, 2rem) clamp(1.5rem, 3vw, 2rem);
  transform: rotate(var(--card-rot, 0deg));
  box-shadow:
    0 1px 2px oklch(0 0 0 / 0.1),
    0 4px 12px oklch(0 0 0 / 0.15),
    0 8px 24px oklch(0 0 0 / 0.1);
  transition:
    box-shadow 0.4s var(--ease-settle);
}

.index-card.visible:hover {
  box-shadow:
    0 2px 4px oklch(0 0 0 / 0.08),
    0 8px 20px oklch(0 0 0 / 0.18),
    0 14px 36px oklch(0 0 0 / 0.14);
}

/* Ruled lines on index card */
.index-card::after {
  content: '';
  position: absolute;
  inset: 2.6rem 0 0 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 26px,
    oklch(0.70 0.06 220 / 0.12) 26px,
    oklch(0.70 0.06 220 / 0.12) 27px
  );
  pointer-events: none;
}

/* Walnut ink margin line */
.index-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 44px;
  bottom: 0;
  width: 1px;
  background: oklch(0.55 0.06 55 / 0.15);
  pointer-events: none;
}

.card-title {
  font-family: var(--font-display);
  font-size: clamp(0.85rem, 0.8rem + 0.25vw, 1rem);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.01em;
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
}

.card-text {
  font-size: clamp(0.82rem, 0.78rem + 0.2vw, 0.92rem);
  color: var(--ink-dim);
  line-height: 1.55;
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------------
   Push pin — 3D dome with shadow
-------------------------------------------------------- */
.push-pin {
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  width: 20px;
  height: 20px;
}

.push-pin::before {
  content: '';
  display: block;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: radial-gradient(
    circle at 38% 32%,
    oklch(0.78 0.12 var(--pin-hue, 25)) 0%,
    oklch(0.58 0.20 var(--pin-hue, 25)) 40%,
    oklch(0.40 0.16 var(--pin-hue, 25)) 100%
  );
  box-shadow:
    0 1px 0 oklch(0.83 0.08 var(--pin-hue, 25) / 0.4),
    0 3px 6px oklch(0 0 0 / 0.35),
    inset 0 -2px 3px oklch(0 0 0 / 0.15);
}

/* Pin point shadow on card */
.push-pin::after {
  content: '';
  display: block;
  width: 5px;
  height: 5px;
  margin: 0 auto;
  border-radius: 50%;
  background: oklch(0 0 0 / 0.15);
  filter: blur(1.5px);
}

/* --------------------------------------------------------
   Wax seal
-------------------------------------------------------- */
.wax-seal {
  position: absolute;
  bottom: clamp(1rem, 3vw, 1.5rem);
  right: clamp(1.5rem, 4vw, 2.5rem);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(
    circle at 42% 38%,
    var(--wax-hi) 0%,
    var(--wax) 45%,
    oklch(0.28 0.14 18) 100%
  );
  box-shadow:
    inset 0 2px 3px oklch(0.48 0.12 28 / 0.4),
    inset 0 -2px 4px oklch(0 0 0 / 0.3),
    0 2px 6px oklch(0 0 0 / 0.3),
    0 4px 12px oklch(0 0 0 / 0.15);
}

.wax-seal span {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 900;
  color: oklch(0.30 0.13 20);
  text-shadow:
    0 1px 0 oklch(0.42 0.14 25 / 0.5),
    0 -0.5px 0 oklch(0.22 0.10 18 / 0.4);
  line-height: 1;
}

/* --------------------------------------------------------
   Coffee ring — easter egg
-------------------------------------------------------- */
.coffee-ring {
  position: absolute;
  top: 82%;
  right: -1rem;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    transparent 32px,
    var(--coffee) 33px,
    oklch(0.32 0.05 58 / 0.12) 38px,
    oklch(0.32 0.05 58 / 0.05) 40px,
    transparent 42px
  );
  pointer-events: none;
  opacity: 0.7;
}

/* --------------------------------------------------------
   Second showcase — slightly different treatment
-------------------------------------------------------- */
.showcase-2 .polaroid {
  max-width: 720px;
}

/* --------------------------------------------------------
   Footer — debossed into the desk
-------------------------------------------------------- */
.desk-footer {
  padding-block: clamp(2rem, 5vw, 3.5rem);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: oklch(0.22 0.03 50);
  text-shadow: 0 1px 0 oklch(0.34 0.04 58 / 0.6);
  transition: color 0.2s;
}

.footer-brand:hover {
  color: var(--brass);
  text-shadow: 0 1px 0 oklch(0.22 0.03 50 / 0.4);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 300;
  color: oklch(0.22 0.03 50);
  text-shadow: 0 1px 0 oklch(0.34 0.04 58 / 0.5);
  letter-spacing: 0.04em;
}

/* --------------------------------------------------------
   Selection
-------------------------------------------------------- */
::selection {
  background: var(--brass);
  color: var(--brass-text);
}

/* --------------------------------------------------------
   Focus
-------------------------------------------------------- */
a:focus-visible,
.brass-button:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 4px;
}

/* ==========================================================
   Scroll-reveal animation system
   Each section starts hidden and animates in when
   IntersectionObserver adds .visible.
   ========================================================== */

/* ── Base hidden state ────────────────────────────────── */
.reveal {
  opacity: 0;
}

/* ── Variant initial transforms ───────────────────────── */
.reveal--fade {
  transform: translateY(16px);
}

.reveal--paper {
  transform: translateY(-18px);
}

.reveal--polaroid {
  transform: translateY(-28px);
}

.reveal--strata {
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 1; /* strata doesn't need opacity fade */
}

.reveal--note {
  transform: translateX(-24px);
}

.reveal--card {
  opacity: 0;
  transform: rotate(0deg) translateY(20px);
}

/* ── Visible states ───────────────────────────────────── */
.reveal--fade.visible {
  animation: fade-up 0.65s var(--ease-settle) forwards;
}

.reveal--paper.visible {
  animation: paper-settle 0.9s var(--ease-spring) forwards;
}

.reveal--polaroid.visible {
  animation: polaroid-drop 0.8s var(--ease-settle) forwards;
}

.reveal--strata.visible {
  animation: strata-reveal 0.7s var(--ease-settle) forwards;
}

.reveal--note.visible {
  animation: note-slide 0.7s var(--ease-settle) forwards;
}

.reveal--card.visible {
  animation: card-deal 0.6s var(--ease-spring) forwards;
  animation-delay: calc(var(--card-i, 0) * 0.1s);
}

/* ── Keyframes ────────────────────────────────────────── */
@keyframes fade-up {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes paper-settle {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes polaroid-drop {
  0% { opacity: 0; transform: translateY(-28px); }
  55% { opacity: 1; transform: translateY(3px); }
  78% { transform: translateY(-1px); }
  100% { opacity: 1; transform: translateY(0); }
}

@keyframes strata-reveal {
  to { transform: scaleX(1); }
}

@keyframes note-slide {
  to { opacity: 1; transform: translateX(0); }
}

@keyframes card-deal {
  0% { opacity: 0; transform: rotate(0deg) translateY(20px); }
  100% { opacity: 1; transform: rotate(var(--card-rot, 0deg)) translateY(0); }
}

/* --------------------------------------------------------
   Responsive
-------------------------------------------------------- */
@media (max-width: 768px) {
  .card-grid {
    grid-template-columns: 1fr;
    gap: clamp(2rem, 5vw, 3rem);
    max-width: 400px;
    margin-inline: auto;
  }

  .stamp {
    display: none;
  }

  .polaroid {
    padding: 6px 6px 36px;
  }
}

@media (max-width: 480px) {
  .desk-header {
    flex-direction: column;
    gap: 0.8rem;
    align-items: flex-start;
  }

  .hero-sheet {
    transform: rotate(0deg);
  }

  .hero-sheet::after {
    display: none;
  }

  .coffee-ring { display: none; }
}

/* --------------------------------------------------------
   Light mode — same desk, morning sun
   Basalt logo plate untouched (branding).
-------------------------------------------------------- */
@media (prefers-color-scheme: light) {
  :root {
    --desk: oklch(0.62 0.04 70);
    --desk-grain: oklch(0.58 0.035 65);
    --desk-light: oklch(0.68 0.045 75);
    --felt: oklch(0.42 0.015 258);
    --felt-dark: oklch(0.36 0.012 255);
    --walnut-ink: oklch(0.42 0.05 50);
    --coffee: oklch(0.42 0.04 58 / 0.06);
  }

  /* Wood grain — honey maple */
  body {
    background-image:
      repeating-linear-gradient(
        87deg,
        transparent 0 2px,
        oklch(0.56 0.035 65 / 0.28) 2px 3px
      ),
      repeating-linear-gradient(
        88.5deg,
        transparent 0 7px,
        oklch(0.64 0.04 72 / 0.10) 7px 9px
      ),
      repeating-linear-gradient(
        86deg,
        transparent 0 23px,
        oklch(0.55 0.03 62 / 0.14) 23px 27px
      ),
      repeating-linear-gradient(
        89deg,
        oklch(0.62 0.04 70 / 0) 0 41px,
        oklch(0.66 0.045 78 / 0.10) 41px 83px
      ),
      radial-gradient(ellipse 60px 200px at 75% 30%, oklch(0.58 0.05 64 / 0.15) 0%, transparent 70%),
      radial-gradient(ellipse 40px 160px at 20% 70%, oklch(0.64 0.04 75 / 0.12) 0%, transparent 70%);
  }

  /* Vignette — wider, softer, warm-tinted */
  .vignette {
    background: radial-gradient(
      ellipse 90% 75% at 50% 10%,
      transparent 40%,
      oklch(0.35 0.02 55 / 0.10) 100%
    );
  }

  /* Dust motes brighter in daylight */
  .vignette::before,
  .vignette::after {
    background: oklch(0.95 0.01 80 / 0.35);
  }

  /* Corner curl shows light desk */
  .hero-sheet::after {
    background: linear-gradient(
      225deg,
      var(--desk) 0%,
      var(--desk) 42%,
      oklch(0.90 0.015 75) 48%,
      var(--paper) 65%
    );
  }

  /* Cork-board — reduce inset shadows */
  .cork-board {
    box-shadow:
      inset 0 3px 10px oklch(0 0 0 / 0.18),
      inset 0 -3px 8px oklch(0 0 0 / 0.12),
      inset 3px 0 8px oklch(0 0 0 / 0.06),
      inset -3px 0 8px oklch(0 0 0 / 0.06),
      0 2px 4px oklch(0 0 0 / 0.10);
  }

  /* Footer — darker text for light maple */
  .footer-brand {
    color: oklch(0.42 0.03 55);
    text-shadow: 0 1px 0 oklch(0.70 0.04 72 / 0.5);
  }

  .footer-brand:hover {
    text-shadow: 0 1px 0 oklch(0.50 0.03 55 / 0.3);
  }

  .footer-copy {
    color: oklch(0.42 0.03 55);
    text-shadow: 0 1px 0 oklch(0.70 0.04 72 / 0.4);
  }
}

/* --------------------------------------------------------
   Reduced motion — no animations, no transitions
-------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0s !important;
    animation-delay: 0s !important;
    transition-duration: 0s !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .reveal--card {
    transform: rotate(var(--card-rot, 0deg)) !important;
  }

  .reveal--strata {
    transform: scaleX(1) !important;
  }
}