/* =====================================================================
   MUGGER CITY — Landing page
   A restrained, museum-grade composition.
   Palette drawn from the Vishwamitri River, river stone, banyan bark,
   and aged archival paper.
   ===================================================================== */

:root {
  /* Surfaces */
  --paper:      #efe9db;  /* aged paper cream — base */
  --ivory:      #f7f3ea;  /* soft ivory — lit centre */
  --paper-deep: #e4dccb;  /* warm stone beige — edges */

  /* Ink & nature */
  --forest:     #28331f;  /* deep forest green — strongest ink */
  --ink:        #34382c;  /* warm body ink */
  --ink-soft:   #5f6253;  /* secondary text */
  --river:      #5d6a4d;  /* muted river green */
  --river-soft: #8b937c;  /* faded river green */
  --stone:      #b9ac93;  /* river stone / beige line */
  --gold:       #9c7e3f;  /* muted museum gold */
  --gold-soft:  #b6a06a;

  --hairline:   rgba(40, 51, 31, 0.16);

  --measure: 53ch;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "Inter", system-ui, sans-serif;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(125% 95% at 50% 30%,
      var(--ivory) 0%,
      var(--paper) 52%,
      var(--paper-deep) 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* =====================================================================
   Archival backdrop — barely-there texture
   ===================================================================== */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-rings {
  position: absolute;
  top: 46%;
  left: 50%;
  width: min(150vh, 168vw);
  height: min(150vh, 168vw);
  transform: translate(-50%, -50%);
  color: var(--river);
  opacity: 0.05;
}

.bg-contours {
  position: absolute;
  left: 50%;
  bottom: -2%;
  width: 132vw;
  height: 46vh;
  transform: translateX(-50%);
  color: var(--river);
  opacity: 0.06;
}

/* paper grain */
.bg-grain {
  position: absolute;
  inset: -50%;
  opacity: 0.5;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.045'/%3E%3C/svg%3E");
}

/* =====================================================================
   Header
   ===================================================================== */
.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding: clamp(1.5rem, 3vw, 2.75rem) clamp(1.5rem, 5vw, 4.5rem);
}

.wordmark {
  font-family: "Cormorant Garamond", serif;
  font-weight: 600;
  font-size: 1.18rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--forest);
}

.nav {
  display: flex;
  gap: clamp(1.1rem, 2.6vw, 2.6rem);
}

.nav-item {
  font-size: 0.685rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
  cursor: default;
  position: relative;
  padding-bottom: 0.35rem;
  transition: color 0.5s var(--ease);
}

.nav-item::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.55s var(--ease);
}

.nav-item:hover {
  color: var(--forest);
}

.nav-item:hover::after { transform: scaleX(1); }

/* =====================================================================
   Hero — centred monument composition
   ===================================================================== */
.hero {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: clamp(2rem, 5vw, 4.5rem) clamp(1.5rem, 5vw, 4.5rem) clamp(2.5rem, 4vw, 4rem);
}

.eyebrow {
  margin: 0;
  font-size: clamp(0.66rem, 1vw, 0.74rem);
  font-weight: 400;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--gold);
  position: relative;
  padding-top: 1.85rem;
}

.eyebrow::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 1.15rem;
  background: var(--gold-soft);
}

.title {
  margin: clamp(1.1rem, 2.2vw, 1.8rem) 0 0;
  font-family: "Cormorant Garamond", serif;
  font-weight: 300;
  font-size: clamp(3.4rem, 12vw, 9.5rem);
  line-height: 0.98;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--forest);
}

.subtitle {
  margin: clamp(0.9rem, 1.6vw, 1.4rem) 0 0;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.25rem, 2.6vw, 1.85rem);
  letter-spacing: 0.02em;
  color: var(--river);
}

.intro {
  margin: clamp(1.6rem, 3vw, 2.4rem) auto 0;
  max-width: var(--measure);
  font-size: clamp(0.95rem, 1.25vw, 1.04rem);
  font-weight: 300;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* =====================================================================
   The specimen
   ===================================================================== */
.specimen {
  margin: clamp(2.6rem, 5.5vw, 5rem) 0 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.specimen-frame {
  position: relative;
  width: 100%;
  max-width: 980px;
  display: flex;
  justify-content: center;
}

/* soft elliptical contact shadow — grounds the animal like an exhibit piece */
.specimen-frame::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 1%;
  width: 78%;
  height: 5.5%;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center,
    rgba(40, 51, 31, 0.26) 0%,
    rgba(40, 51, 31, 0.10) 45%,
    transparent 72%);
  filter: blur(7px);
  z-index: -1;
}

.specimen-frame img {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 26px 26px rgba(40, 51, 31, 0.12));
}

.specimen-caption {
  margin-top: clamp(1.4rem, 2.4vw, 2.1rem);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
}

.specimen-caption .species {
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  text-transform: none;
  font-size: 1.02rem;
  letter-spacing: 0.04em;
  color: var(--forest);
}

.specimen-caption .sep { color: var(--gold-soft); }

/* =====================================================================
   Timeline — a quiet preview, not interactive
   ===================================================================== */
.timeline {
  position: relative;
  width: 100%;
  max-width: 720px;
  margin: clamp(3rem, 6vw, 5.5rem) auto 0;
  padding: 0 0.5rem;
}

.timeline-rule {
  position: absolute;
  left: 0.5rem;
  right: 0.5rem;
  top: 4px;
  height: 1px;
  background: linear-gradient(to right,
    transparent,
    var(--hairline) 12%,
    var(--hairline) 88%,
    transparent);
}

.timeline-marks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: space-between;
}

.timeline-marks li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  flex: 1;
}

.timeline-marks li:first-child { align-items: flex-start; }
.timeline-marks li:last-child { align-items: flex-end; }

.tick {
  width: 1px;
  height: 9px;
  background: var(--river-soft);
}

.age {
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.timeline-marks .now .tick { height: 13px; background: var(--gold); }
.timeline-marks .now .age { color: var(--gold); }

/* =====================================================================
   Colophon
   ===================================================================== */
.colophon {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: clamp(2rem, 4vw, 3.25rem) 1.5rem clamp(1.6rem, 3vw, 2.4rem);
}

.colophon p {
  margin: 0;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--river-soft);
}

/* =====================================================================
   Motion — gentle, supporting, never the subject
   ===================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(14px);
}

.is-ready .reveal {
  animation: rise 1.25s var(--ease) forwards;
}

.is-ready .title    { animation-delay: 0.12s; }
.is-ready .subtitle { animation-delay: 0.26s; }
.is-ready .intro    { animation-delay: 0.40s; }
.is-ready .specimen { animation-delay: 0.56s; }
.is-ready .timeline { animation-delay: 0.78s; }

@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}

/* =====================================================================
   Responsive
   ===================================================================== */
@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  .nav { gap: 1.4rem; flex-wrap: wrap; justify-content: center; }
  .hero { padding-top: 1.5rem; }
  .timeline-marks .age { font-size: 0.56rem; letter-spacing: 0.12em; }
  .specimen-caption { letter-spacing: 0.18em; }
}

@media (max-width: 440px) {
  .title { letter-spacing: 0.02em; }
  .timeline-marks li:nth-child(2),
  .timeline-marks li:nth-child(4) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  .is-ready .reveal { animation: none; }
  .nav-item, .nav-item::after { transition: none; }
}