/* ============================================================
   Tirth Gada — landing page styles (light theme)
   ============================================================ */

:root {
  --font-serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --bg:       #faf9f6;
  --bg-2:     #f1efe9;
  --surface:  #ffffff;
  --text:     #1b1a17;
  --text-2:   #55524b;
  --text-3:   #8a867d;
  --line:     #e4e0d7;
  --line-2:   #d3cec3;
  --accent:   #b9471a;
  --accent-2: #8f3611;
  --accent-wash: rgba(185, 71, 26, 0.08);

  --page:  1080px;
  --prose: 62ch;
  --radius: 12px;
  --row-h: 400px;          /* target height of a media row on desktop */

  color-scheme: light;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; }
::selection { background: var(--accent-wash); color: var(--accent-2); }

.container {
  width: 100%;
  max-width: var(--page);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── header ─────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.site-header.is-stuck { border-bottom-color: var(--line); }

.site-header .container {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: 3.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: -.01em;
  text-decoration: none;
  white-space: nowrap;
}
.brand-mark {
  width: 28px; height: 28px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line);
  display: block;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.site-nav a {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--text-3);
  text-decoration: none;
  transition: color .18s;
}
.site-nav a:hover { color: var(--accent); }

/* ── hero ───────────────────────────────────────────────── */
.hero { padding: 4rem 0 3rem; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 3.5rem;
  align-items: start;
}

.hero h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.6rem, 6.4vw, 4.2rem);
  letter-spacing: -.02em;
  line-height: 1.02;
  margin-bottom: 1.5rem;
}
.hero h1 em { font-style: italic; color: var(--accent); }

.hero-bio p {
  font-size: 1.06rem;
  line-height: 1.7;
  color: var(--text-2);
  max-width: var(--prose);
  margin-bottom: 1rem;
}
.hero-bio strong { color: var(--text); font-weight: 500; }
.hero-bio a { color: var(--text); text-decoration-color: var(--line-2); text-underline-offset: 3px; }
.hero-bio a:hover { color: var(--accent); text-decoration-color: var(--accent); }

.hero-photo { position: relative; }
.hero-photo img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: 50% 28%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  display: block;
  box-shadow: 0 20px 40px -24px rgba(27, 26, 23, .35);
}

/* ── buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  text-decoration: none;
  padding: .55rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  color: var(--text-2);
  background: var(--surface);
  transition: color .18s, border-color .18s, background .18s, transform .18s;
}
.btn:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-1px); }
.btn svg { width: 14px; height: 14px; }
.btn--primary { background: var(--text); border-color: var(--text); color: var(--bg); }
.btn--primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ── section scaffolding ────────────────────────────────── */
.section { padding: 4rem 0; }
.section + .section { border-top: 1px solid var(--line); }

.section-head { margin-bottom: 2.5rem; max-width: var(--prose); }
.section-label {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--accent);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: .6rem;
}
.section-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  letter-spacing: -.015em;
  line-height: 1.1;
}
.section-title em { font-style: italic; color: var(--accent); }
.section-intro { color: var(--text-2); margin-top: .9rem; font-size: 1.02rem; }

/* ── journey: one continuous thread ─────────────────────── */
.thread { position: relative; }
.thread::before {
  content: "";
  position: absolute;
  left: 15px;
  top: .5rem;
  bottom: 0;
  width: 1px;
  background: var(--line-2);
}

.chapter {
  position: relative;
  padding: 0 0 4rem 4rem;
}
.chapter:last-child { padding-bottom: 0; }

.chapter-mark {
  position: absolute;
  left: 0;
  top: .35rem;
  width: 31px; height: 31px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--line-2);
  font-family: var(--font-mono);
  font-size: .66rem;
  color: var(--text-3);
}
.chapter.is-now .chapter-mark { border-color: var(--accent); color: var(--accent); background: var(--accent-wash); }

.chapter h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  letter-spacing: -.01em;
  line-height: 1.15;
  margin-bottom: .75rem;
}
.chapter h3 em { font-style: italic; color: var(--accent); }


.chapter p {
  color: var(--text-2);
  max-width: var(--prose);
  margin-bottom: .85rem;
  font-size: 1.02rem;
}
.chapter p:last-of-type { margin-bottom: 0; }
.chapter p strong { color: var(--text); font-weight: 500; }
.chapter p a { color: var(--text); text-decoration-color: var(--line-2); text-underline-offset: 3px; }
.chapter p a:hover { color: var(--accent); text-decoration-color: var(--accent); }

/* ── media rows ─────────────────────────────────────────── */
/* Every figure carries --ar (width/height). In a row, each figure's
   basis is row-height × ar, so all items share one height and shrink
   together if the row overflows. On narrow screens rows wrap. */
.media-row {
  display: flex;
  flex-wrap: nowrap;
  gap: .85rem;
  margin-top: 1.6rem;
}
.media-row + .media-row { margin-top: .85rem; }
.media-row--tall { --row-h: 480px; }

.media-row figure {
  flex: 0 1 calc(var(--row-h) * var(--ar, 1.777));
  min-width: 0;
  max-width: 100%;
}

.media-box {
  position: relative;
  aspect-ratio: var(--ar, 1.777);
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-2);
  border: 1px solid var(--line);
}
.media-box video, .media-box img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.media-box video { cursor: pointer; }

.media-row figcaption {
  font-size: .78rem;
  line-height: 1.5;
  color: var(--text-3);
  margin-top: .5rem;
  padding: 0 .15rem;
}
.media-row figcaption strong { color: var(--text-2); font-weight: 500; }
.media-row figcaption a { color: var(--text-2); text-decoration-color: var(--line-2); text-underline-offset: 2px; }
.media-row figcaption a:hover { color: var(--accent); }

/* ── "two things" split ─────────────────────────────────── */
.pillars { display: grid; grid-template-columns: 1fr; gap: 3.5rem; }
.pillar h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  letter-spacing: -.01em;
  line-height: 1.15;
  margin-bottom: .75rem;
}
.pillar h3 em { font-style: italic; color: var(--accent); }
.pillar p {
  color: var(--text-2);
  max-width: var(--prose);
  margin-bottom: .85rem;
  font-size: 1.02rem;
}
.pillar p:last-of-type { margin-bottom: 0; }
.pillar p strong { color: var(--text); font-weight: 500; }

/* ── projects: a plain list ─────────────────────────────── */
.project-list { list-style: none; border-top: 1px solid var(--line); }
.project-list li { border-bottom: 1px solid var(--line); }
.project-list a {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 14rem) 1fr auto;
  align-items: baseline;
  gap: 1.25rem;
  padding: 1.15rem .25rem;
  text-decoration: none;
  transition: background .18s, padding .18s;
}
.project-list a:hover { background: var(--accent-wash); padding-left: .75rem; }
.project-idx { font-family: var(--font-mono); font-size: .7rem; color: var(--text-3); }
.project-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  letter-spacing: -.01em;
  line-height: 1.2;
}
.project-brief { color: var(--text-2); font-size: .95rem; }
.project-arrow { font-family: var(--font-mono); color: var(--text-3); font-size: .8rem; transition: color .18s, transform .18s; }
.project-list a:hover .project-arrow { color: var(--accent); transform: translateX(3px); }

/* ── footer ─────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 3rem;
}
.site-footer .container {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-footer p { font-family: var(--font-mono); font-size: .72rem; color: var(--text-3); }
.footer-sign { display: flex; align-items: center; gap: .9rem; }
.footer-sign img {
  width: 56px; height: 72px;
  object-fit: cover;
  object-position: 50% 30%;
  border-radius: 10px;
  border: 1px solid var(--line);
  display: block;
}
.footer-links { margin-left: auto; display: flex; flex-wrap: wrap; gap: 1.25rem; }
.footer-links a {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--text-2);
  text-decoration: none;
}
.footer-links a:hover { color: var(--accent); }

/* ── reveal on scroll ───────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(14px); }
.reveal.is-in { opacity: 1; transform: none; transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.3,1); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ── responsive ─────────────────────────────────────────── */
@media (min-width: 900px) {
  .pillars { grid-template-columns: 1fr 1fr; gap: 3rem; }
  .pillar .media-row { --row-h: 250px; }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr) 220px; gap: 2.5rem; }
  :root { --row-h: 320px; }
}

@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .section { padding: 3rem 0; }
  .hero { padding: 2.5rem 0 2rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .hero-photo { order: -1; width: 160px; }
  .hero-photo img { aspect-ratio: 1; object-position: 50% 22%; border-radius: 50%; }
  .hero-bio p, .chapter p, .pillar p { font-size: 1rem; }

  .thread::before { display: none; }
  .chapter { padding-left: 0; padding-bottom: 3rem; }
  .chapter-mark { position: static; display: block; width: auto; height: auto; border: 0; background: none; border-radius: 0; margin-bottom: .4rem; color: var(--accent); }
  .chapter-mark::before { content: "chapter "; }

  /* rows wrap; bases are width-driven so two portrait clips share a
     line (widths ∝ aspect → equal heights) while landscape clips go
     full width. A lone portrait is capped by height and centred. */
  .media-row { flex-wrap: wrap; justify-content: center; gap: .6rem; }
  .media-row figure {
    flex: var(--ar, 1.777) 1 calc(var(--ar, 1.777) * 62%);
    max-width: min(100%, calc(var(--ar, 1.777) * 78vh));
  }

  .project-list a { grid-template-columns: 2rem 1fr auto; row-gap: .2rem; }
  .project-brief { grid-column: 2 / 3; }
  .site-nav { gap: .9rem; }
  .site-nav a[data-optional] { display: none; }
  .site-footer .container { flex-direction: column; align-items: flex-start; }
  .footer-links { margin-left: 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.1rem; }
  .brand { font-size: 1.2rem; }
}