/* ==========================================================================
   twisha mehta — site.css (clean / white)
   type: Geist (UI + body) · Instrument Serif (sparing accents) · Geist Mono (labels)
   ========================================================================== */

:root {
  --paper: #ffffff;
  --paper-2: #f7f7f6;
  --paper-3: #efefed;
  --ink: #111111;
  --ink-2: #4a4a4a;
  --mute: #8b8b8b;
  --line: #ececea;
  --line-2: #dcdcd9;
  --accent: #2b4dff;
  --accent-soft: rgba(43, 77, 255, 0.07);
  --blue: #2b4dff;
  --green: #12965a;
  --on-accent: #ffffff;

  --f-display: "Geist", ui-sans-serif, system-ui, sans-serif;
  --f-serif: "Instrument Serif", ui-serif, Georgia, serif;
  --f-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --gutter: clamp(20px, 5vw, 48px);
  --max: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --r: 14px;
  color-scheme: light;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--f-display);
  font-size: 16.5px;
  line-height: 1.6;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, canvas, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
code { font-family: var(--f-mono); font-size: 0.88em; background: var(--paper-2); border: 1px solid var(--line); padding: 1px 5px; border-radius: 5px; }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
main, header, footer, section { position: relative; }

/* ---------- type ---------- */
.mono { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0; }
.label, .note {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.01em;
  color: var(--mute);
  text-transform: none;
}
.label { display: inline-flex; align-items: center; gap: 8px; }
.serif { font-family: var(--f-serif); font-weight: 400; font-style: italic; letter-spacing: -0.005em; }
.d1, .d2, .d3 { font-weight: 600; letter-spacing: -0.035em; line-height: 1.04; }
.d1 { font-size: clamp(40px, 5.6vw, 68px); }
.d2 { font-size: clamp(30px, 3.6vw, 44px); line-height: 1.1; letter-spacing: -0.03em; }
.d3 { font-size: clamp(24px, 2.6vw, 32px); line-height: 1.15; letter-spacing: -0.025em; }
.d1 .serif, .d2 .serif, .d3 .serif { font-weight: 400; font-size: 1.06em; letter-spacing: -0.01em; }
.lede { font-size: clamp(19px, 1.9vw, 23px); line-height: 1.45; letter-spacing: -0.015em; color: var(--ink-2); max-width: 34ch; font-weight: 400; }
.lede em, .prose em { font-family: var(--f-serif); font-style: italic; font-size: 1.08em; }
.prose { max-width: 64ch; color: var(--ink-2); font-size: 16.5px; line-height: 1.7; }
.prose p + p { margin-top: 0.9em; }
.prose strong { color: var(--ink); font-weight: 560; }
.prose a, .link { color: var(--ink); text-decoration: underline; text-decoration-color: var(--line-2); text-underline-offset: 3px; transition: text-decoration-color 0.2s, color 0.2s; }
.prose a:hover, .link:hover { color: var(--accent); text-decoration-color: var(--accent); }
.accent { color: var(--accent); }
.muted { color: var(--mute); }

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: clamp(64px, 9vw, 120px) 0; }
.section-head { display: grid; gap: 10px; margin-bottom: clamp(28px, 4vw, 48px); }
.rule { height: 1px; background: var(--line); border: 0; }

/* ---------- nav ---------- */
.nav { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, 0.86); -webkit-backdrop-filter: blur(12px) saturate(1.5); backdrop-filter: blur(12px) saturate(1.5); border-bottom: 1px solid transparent; transition: border-color 0.3s; }
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav-inner { max-width: var(--max); margin: 0 auto; padding: 14px var(--gutter); display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.015em; font-size: 15.5px; }
.brand-mark { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; background: var(--ink); color: #fff; font-family: var(--f-serif); font-style: italic; font-size: 16px; line-height: 1; transition: transform 0.5s var(--ease); }
.brand:hover .brand-mark { transform: rotate(-12deg); }
.nav-links { display: none; align-items: center; gap: 4px; }
.nav-link { position: relative; padding: 6px 12px; border-radius: 8px; font-size: 14.5px; color: var(--ink-2); transition: color 0.2s, background 0.2s; }
.nav-link:hover { color: var(--ink); background: var(--paper-2); }
.nav-link[aria-current="page"] { color: var(--ink); }
.nav-link[aria-current="page"]::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: 1px; height: 1.5px; background: var(--ink); border-radius: 2px; }
.nav-tools { display: flex; align-items: center; gap: 8px; }
.icon-btn { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; border: 1px solid var(--line-2); transition: background 0.2s; }
.icon-btn:hover { background: var(--paper-2); }
.icon-btn svg { width: 16px; height: 16px; }
.menu-btn { display: inline-grid; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 10px;
  font-size: 14px; font-weight: 500;
  background: var(--ink); color: #fff; border: 1px solid var(--ink);
  transition: background 0.2s, transform 0.3s var(--ease), border-color 0.2s, color 0.2s;
  white-space: nowrap;
}
.pill:hover { background: #2a2a2a; transform: translateY(-1px); }
.pill.ghost { background: #fff; color: var(--ink); border-color: var(--line-2); }
.pill.ghost:hover { background: var(--paper-2); border-color: var(--ink-2); }
.pill.ink { background: var(--ink); color: #fff; }
.nav .pill { display: none; padding: 7px 13px; font-size: 13.5px; }
@media (min-width: 820px) { .nav-links { display: flex; } .menu-btn { display: none; } .nav .pill { display: inline-flex; } }

.menu { position: fixed; inset: 0; z-index: 99; background: #fff; display: flex; flex-direction: column; justify-content: center; gap: 6px; padding: 90px var(--gutter) 40px; opacity: 0; pointer-events: none; transition: opacity 0.3s var(--ease); }
.menu.is-open { opacity: 1; pointer-events: auto; }
.menu a.big { font-size: 40px; font-weight: 600; letter-spacing: -0.035em; line-height: 1.2; display: flex; align-items: baseline; gap: 12px; transform: translateY(10px); transition: transform 0.4s var(--ease); }
.menu.is-open a.big { transform: none; }
.menu a.big small { font-family: var(--f-mono); font-size: 11px; color: var(--mute); font-weight: 400; letter-spacing: 0; }
.menu-foot { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 10px 20px; color: var(--mute); }
body.menu-open .nav { z-index: 101; background: #fff; }

/* ---------- reveal (subtle) ---------- */
.js [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); transition-delay: var(--d, 0s); }
.js [data-reveal].is-in { opacity: 1; transform: none; }
.js [data-reveal="fade"], .js [data-reveal="scale"], .js [data-reveal="left"] { transform: none; }
.split .w { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: 0.1em; margin-bottom: -0.1em; }
.split .w > span { display: inline-block; transform: translateY(40%); opacity: 0; transition: transform 0.8s var(--ease), opacity 0.8s var(--ease); transition-delay: calc(var(--i) * 0.025s + var(--d, 0s)); }
.split.is-in .w > span { transform: none; opacity: 1; }
.no-js .split .w > span { transform: none; opacity: 1; }

/* ---------- cards ---------- */
.card { position: relative; display: block; border-radius: var(--r); background: #fff; border: 1px solid var(--line); overflow: hidden; transition: border-color 0.25s, box-shadow 0.4s var(--ease), transform 0.4s var(--ease); }
.card:hover { border-color: var(--line-2); box-shadow: 0 12px 32px -18px rgba(0, 0, 0, 0.18); transform: translateY(-2px); }
.card .card-media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--paper-2); border-bottom: 1px solid var(--line); }
.card .card-media canvas { width: 100%; height: 100%; }
.card .card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s var(--ease); }
.card:hover .card-media img { transform: scale(1.03); }
.card .card-body { padding: 20px 20px 22px; display: grid; gap: 8px; }
.card .card-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.card h3 { font-size: 20px; line-height: 1.25; letter-spacing: -0.02em; font-weight: 600; }
.card p { color: var(--ink-2); font-size: 15px; line-height: 1.55; }
.card .arrow { color: var(--mute); transition: transform 0.3s var(--ease), color 0.2s; }
.card:hover .arrow { transform: translateX(3px); color: var(--ink); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.tag { font-family: var(--f-mono); font-size: 11px; padding: 3px 8px; border-radius: 6px; background: var(--paper-2); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap; }
.tag.hot { background: var(--accent-soft); color: var(--accent); border-color: transparent; }

.stat { display: grid; gap: 4px; }
.stat-n { font-size: clamp(30px, 3.4vw, 42px); font-weight: 600; letter-spacing: -0.04em; line-height: 1; font-variant-numeric: tabular-nums; }
.stat-n small { font-size: 0.5em; letter-spacing: -0.01em; font-weight: 500; margin-left: 3px; color: var(--ink-2); }
.stat-l { color: var(--mute); font-size: 13.5px; line-height: 1.45; max-width: 28ch; }

/* ---------- footer ---------- */
.footer { padding: clamp(64px, 9vw, 110px) 0 28px; border-top: 1px solid var(--line); margin-top: clamp(40px, 6vw, 80px); }
.footer-cta { display: grid; gap: 18px; }
.footer-big { display: block; font-size: clamp(28px, 3.4vw, 40px); font-weight: 600; letter-spacing: -0.03em; line-height: 1.15; max-width: 22ch; }
.footer-big .serif { font-weight: 400; }
.footer-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.copy-btn { position: relative; }
.copy-btn .copied { position: absolute; left: 50%; top: -32px; transform: translate(-50%, 6px); background: var(--ink); color: #fff; font-family: var(--f-mono); font-size: 11px; padding: 4px 8px; border-radius: 6px; opacity: 0; pointer-events: none; transition: opacity 0.2s, transform 0.3s var(--ease); }
.copy-btn.did-copy .copied { opacity: 1; transform: translate(-50%, 0); }
.footer-meta { margin-top: clamp(48px, 7vw, 80px); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; color: var(--mute); font-family: var(--f-mono); font-size: 12px; }
.footer-meta a:hover { color: var(--ink); }
.clock { font-variant-numeric: tabular-nums; }
.dot-live { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--green); margin-right: 7px; vertical-align: 1px; }

/* ---------- inner page header ---------- */
.page-hero { padding: clamp(56px, 9vw, 110px) 0 clamp(36px, 5vw, 60px); }
.page-hero .crumbs, .proj-hero .crumbs { display: flex; gap: 8px; align-items: center; margin-bottom: 22px; color: var(--mute); }
.page-hero .crumbs a:hover, .proj-hero .crumbs a:hover { color: var(--ink); }
.page-hero-grid { display: grid; gap: 28px; }
@media (min-width: 960px) { .page-hero-grid { grid-template-columns: 1.3fr 1fr; align-items: end; gap: 56px; } }

.meta-list { display: grid; border-top: 1px solid var(--line); }
.meta-list > div { display: grid; grid-template-columns: 96px 1fr; gap: 14px; padding: 11px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.meta-list dt { color: var(--mute); font-family: var(--f-mono); font-size: 11.5px; padding-top: 2px; }

/* photos — a missing image removes its whole <figure> */
.photo { position: relative; overflow: hidden; border-radius: 12px; background: var(--paper-2); margin: 0; }
.photo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.9s var(--ease); }
.photo:hover img { transform: scale(1.025); }
.photo figcaption { position: absolute; left: 10px; bottom: 10px; font-family: var(--f-mono); font-size: 11px; background: rgba(255,255,255,.92); color: var(--ink); padding: 4px 8px; border-radius: 6px; }

/* ---------- utilities ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.stack-sm > * + * { margin-top: 10px; }
.stack > * + * { margin-top: 22px; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.between { justify-content: space-between; }
.grid-2 { display: grid; gap: 24px; }
@media (min-width: 900px) { .grid-2 { grid-template-columns: 1fr 1fr; gap: 48px; } }

/* ==========================================================================
   project detail pages
   ========================================================================== */
.proj-hero { padding: clamp(56px, 9vw, 110px) 0 clamp(32px, 4vw, 50px); }
.proj-title { font-size: clamp(42px, 6.4vw, 76px); font-weight: 600; letter-spacing: -0.045em; line-height: 1; }
.proj-title .serif { font-weight: 400; }
.proj-sub { display: grid; gap: 28px; margin-top: clamp(22px, 3vw, 36px); }
@media (min-width: 960px) { .proj-sub { grid-template-columns: 1.2fr 1fr; align-items: start; gap: 56px; } }
.demo { border-radius: 16px; border: 1px solid var(--line-2); background: #fff; overflow: hidden; display: grid; box-shadow: 0 20px 50px -34px rgba(0, 0, 0, 0.25); }
.demo-bar { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; justify-content: space-between; padding: 12px 14px; border-bottom: 1px solid var(--line); background: var(--paper-2); }
.demo-bar .dots { display: flex; gap: 6px; }
.demo-bar .dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.demo-stage { position: relative; min-height: 340px; }
.demo-stage canvas { width: 100%; height: 100%; position: absolute; inset: 0; }
.demo-controls { display: flex; flex-wrap: wrap; gap: 14px 22px; align-items: end; padding: 14px; border-top: 1px solid var(--line); }
.ctrl { display: grid; gap: 6px; }
.seg { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--line-2); border-radius: 9px; padding: 2px; background: #fff; }
.seg button { font-family: var(--f-mono); font-size: 11.5px; padding: 6px 11px; border-radius: 7px; color: var(--ink-2); transition: background 0.2s, color 0.2s; }
.seg button[aria-pressed="true"] { background: var(--ink); color: #fff; }
.seg button:disabled { opacity: 0.4; cursor: not-allowed; }
.readouts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border-top: 1px solid var(--line); }
@media (min-width: 800px) { .readouts { grid-template-columns: repeat(4, 1fr); } }
.readouts div { background: #fff; padding: 12px 14px; display: grid; gap: 2px; }
.readouts b { font-size: clamp(22px, 2.2vw, 28px); font-weight: 600; letter-spacing: -0.035em; line-height: 1.1; font-variant-numeric: tabular-nums; }
.btn-fire { font-family: var(--f-mono); font-size: 11.5px; padding: 8px 13px; border-radius: 9px; background: var(--accent); color: #fff; transition: transform 0.2s var(--ease), background 0.2s; }
.btn-fire:active { transform: scale(0.96); }
.btn-fire[aria-pressed="true"] { background: var(--ink); }

.story { display: grid; gap: clamp(56px, 7vw, 96px); }
.story-block { display: grid; gap: 14px; }
@media (min-width: 960px) { .story-block { grid-template-columns: 200px 1fr; gap: 48px; } }
.story-block h3 { font-size: clamp(24px, 2.6vw, 32px); letter-spacing: -0.025em; line-height: 1.15; font-weight: 600; margin-bottom: 14px; }
.story-block h3 .serif { font-weight: 400; }

.findings { display: grid; gap: 14px; counter-reset: f; }
@media (min-width: 900px) { .findings { grid-template-columns: repeat(3, 1fr); } }
.finding { counter-increment: f; padding: 22px; border-radius: var(--r); background: var(--paper-2); border: 1px solid var(--line); display: grid; gap: 10px; align-content: start; }
.finding::before { content: counter(f, decimal-leading-zero); font-family: var(--f-mono); font-size: 12px; color: var(--mute); }
.finding h4 { font-size: 18px; letter-spacing: -0.015em; line-height: 1.25; font-weight: 600; }
.finding p { color: var(--ink-2); font-size: 15px; }

.bars { display: grid; gap: 8px; }
.bar-row { display: grid; grid-template-columns: 110px 1fr 70px; gap: 12px; align-items: center; font-size: 13.5px; }
.bar-row .track { height: 18px; background: var(--paper-2); border-radius: 5px; overflow: hidden; }
.bar-row .fill { height: 100%; width: 0; background: #c9c9c6; border-radius: 5px; transition: width 1.1s var(--ease); transition-delay: var(--d, 0s); }
.bar-row.best .fill { background: var(--accent); }
.bar-row .v { font-family: var(--f-mono); font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; }
.bars.is-in .fill { width: var(--w); }
@media (max-width: 560px) { .bar-row { grid-template-columns: 84px 1fr 56px; font-size: 12.5px; } }

.next-proj { display: block; padding: clamp(36px, 5vw, 60px) var(--gutter); border-top: 1px solid var(--line); max-width: var(--max); margin: 0 auto; }
.next-proj .d2 { transition: color 0.2s; }
.next-proj:hover .d2 { color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
  .split .w > span { transform: none; opacity: 1; }
}