/* ============================================================
   MARAPU CLIFF — design tokens
   Art direction: volcanic basalt, bleached savannah grass,
   deep Indian Ocean. Editorial, quiet, high-contrast dark.
   ============================================================ */

:root {
  /* ---- palette ---- */
  --basalt-900: #0c0d0c;
  --basalt-800: #131513;
  --basalt-700: #1c1f1c;
  --basalt-600: #2a2e2b;
  --stone-500:  #565a54;
  --stone-400:  #7d8079;
  --grass-300:  #b5ab93;
  --bone-200:   #d9d3c6;
  --bone-100:   #efeae0;
  --tide:       #2f5d5b;
  --tide-lit:   #4a8a85;
  --ember:      #b4622f;

  --bg:        var(--basalt-900);
  --bg-raised: var(--basalt-800);
  --ink:       var(--bone-100);
  --ink-dim:   var(--grass-300);
  --ink-faint: var(--stone-400);
  --rule:      color-mix(in oklab, var(--bone-100) 12%, transparent);
  --rule-soft: color-mix(in oklab, var(--bone-100) 7%, transparent);

  /* ---- type ---- */
  --serif: "Cormorant Garamond", "Times New Roman", serif;
  --sans:  "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", monospace;

  --step--1: clamp(0.78rem, 0.76rem + 0.1vw, 0.84rem);
  --step-0:  clamp(0.95rem, 0.92rem + 0.15vw, 1.05rem);
  --step-1:  clamp(1.15rem, 1.05rem + 0.5vw, 1.45rem);
  --step-2:  clamp(1.5rem, 1.25rem + 1.2vw, 2.25rem);
  --step-3:  clamp(2rem, 1.4rem + 3vw, 3.75rem);
  --step-4:  clamp(2.75rem, 1.5rem + 6vw, 6.5rem);
  --step-5:  clamp(3.5rem, 1.2rem + 10vw, 9rem);

  /* ---- space (8px rhythm) ---- */
  --s-1: 0.5rem;  --s-2: 1rem;   --s-3: 1.5rem;  --s-4: 2rem;
  --s-5: 3rem;    --s-6: 4.5rem; --s-7: 7rem;    --s-8: 10rem;

  --gutter: clamp(1.25rem, 5vw, 5.5rem);
  --measure: 62ch;
  --maxw: 88rem;

  /* ---- motion ---- */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-io: cubic-bezier(0.65, 0, 0.35, 1);
  --dur: 0.7s;
}

/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-weight: 400; line-height: 1.04; text-wrap: balance; }
p { text-wrap: pretty; }
::selection { background: var(--tide-lit); color: var(--basalt-900); }

:focus-visible {
  outline: 2px solid var(--tide-lit);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ============================================================
   PRIMITIVES
   ============================================================ */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--s-7); }
.section--tight { padding-block: var(--s-6); }

.display {
  font-family: var(--serif);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 0.95;
}
.display--xl { font-size: var(--step-5); }
.display--lg { font-size: var(--step-4); }
.display--md { font-size: var(--step-3); }

.eyebrow {
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.lede {
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--ink-dim);
  max-width: var(--measure);
  font-weight: 300;
}

.body-dim { color: var(--ink-dim); max-width: var(--measure); }

.rule { height: 1px; background: var(--rule-soft); border: 0; }

/* --- link with drawn underline --- */
.link {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
}
.link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.5s var(--ease);
}
.link:hover::after,
.link:focus-visible::after { transform: scaleX(1); transform-origin: left; }

/* --- button --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  padding: 0.95em 1.9em;
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: color 0.45s var(--ease), border-color 0.45s var(--ease);
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--bone-100);
  transform: translateY(101%);
  transition: transform 0.55s var(--ease);
  z-index: -1;
}
.btn:hover { color: var(--basalt-900); border-color: var(--bone-100); }
.btn:hover::before { transform: translateY(0); }
.btn > * { position: relative; }
.btn--solid {
  background: var(--bone-100);
  color: var(--basalt-900);
  border-color: var(--bone-100);
}
.btn--solid::before { background: var(--tide-lit); }
.btn--solid:hover { color: var(--basalt-900); }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  transition-delay: var(--delay, 0ms);
}
[data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; }
}