/* Bill Fang portfolio — one stylesheet for every page. */

:root {
  --ink: #1f2733;
  --ink-2: #3c4655;
  --muted: #6b7280;
  --paper: #faf9f6;
  --tile: #efede8;
  --line: #e3e0d9;
  --accent: #d4572d;
  --max: 1120px;
  --gut: clamp(16px, 4vw, 40px);
  --display: "Outfit", "Segoe UI", system-ui, sans-serif;
  --body: "Lato", "Segoe UI", system-ui, sans-serif;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.65 var(--body);
  -webkit-font-smoothing: antialiased;
}
img, video, iframe { display: block; max-width: 100%; }
img, video { height: auto; }
a { color: inherit; text-underline-offset: 4px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--display); line-height: 1.1; letter-spacing: -0.02em; margin: 0; font-weight: 700; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.wrap { max-width: var(--max); margin: 0 auto; padding-inline: var(--gut); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 6px; z-index: 20; }
.skip:focus { left: 8px; }

/* Header */
.site-head {
  position: sticky; top: 0; z-index: 10;
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.logo { font: 700 1.15rem/1 var(--display); letter-spacing: -0.01em; text-decoration: none; white-space: nowrap; }
.site-head ul { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px clamp(14px, 3vw, 28px); list-style: none; margin: 0; padding: 0; }
.site-head ul a { text-decoration: none; font-size: 0.95rem; color: var(--ink-2); }
.site-head ul a:hover,
.site-head ul a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-decoration-thickness: 2px; text-decoration-color: var(--accent); text-underline-offset: 6px; }

/* Shared text */
.eyebrow { font: 700 0.78rem/1.3 var(--body); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin: 0 0 16px; }
.lede { font-size: clamp(1.05rem, 1.6vw, 1.22rem); color: var(--ink-2); max-width: 58ch; margin: 22px 0 0; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; border-radius: 999px; border: 1.5px solid var(--ink);
  font-weight: 700; font-size: 0.95rem; text-decoration: none;
  transition: background 0.2s, color 0.2s;
}
.btn:hover { background: var(--ink); color: #fff; }
.btn.primary { background: var(--ink); color: #fff; }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

/* Home: hero and the scrolling project panels */
.hero { padding-block: clamp(56px, 10vw, 120px) clamp(40px, 6vw, 72px); }
.hero h1 { font-size: clamp(2.3rem, 6vw, 4.3rem); max-width: 17ch; }

.work { display: grid; gap: clamp(64px, 9vw, 112px); padding-bottom: clamp(72px, 10vw, 120px); }
.panel { display: block; text-decoration: none; }
.panel .media { aspect-ratio: 16 / 9; border-radius: 10px; overflow: hidden; background: var(--tile); }
.panel .media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.panel:hover .media img { transform: scale(1.02); }
.panel .info { display: grid; grid-template-columns: 48px minmax(0, 1fr) auto; gap: 6px 20px; align-items: baseline; margin-top: 22px; }
.panel .num { font: 600 0.9rem/1 var(--display); color: var(--muted); }
.panel h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
.panel .info p { grid-column: 2; margin: 2px 0 0; color: var(--ink-2); max-width: 62ch; }
.panel .more { grid-column: 3; grid-row: 1; font-weight: 700; white-space: nowrap; text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 2px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 10px 0 0; padding: 0; }
.panel .tags { grid-column: 2; }
.tags li { font-size: 0.8rem; line-height: 1; padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: #fff; }
.all-link { justify-self: start; font: 700 1.2rem/1.2 var(--display); }

@media (max-width: 640px) {
  .panel .info { grid-template-columns: minmax(0, 1fr); }
  .panel .num { display: none; }
  .panel .info p, .panel .tags, .panel .more { grid-column: 1; grid-row: auto; }
}

/* Page heads (projects, about, case studies) */
.page-head { padding-block: clamp(48px, 8vw, 96px) clamp(24px, 4vw, 40px); }
.page-head h1 { font-size: clamp(2.2rem, 5.4vw, 3.8rem); max-width: 20ch; }
.back { display: inline-block; margin-bottom: 20px; font-size: 0.92rem; color: var(--muted); text-decoration: none; }
.back:hover { color: var(--ink); }

.meta { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px 24px; margin: 40px 0 0; padding: 22px 0; border-block: 1px solid var(--line); }
.meta div { min-width: 0; }
.meta dt { font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.meta dd { margin: 0; font-weight: 700; font-size: 0.95rem; line-height: 1.45; }
@media (max-width: 760px) { .meta { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.cover { margin-top: clamp(28px, 4vw, 44px); border-radius: 10px; overflow: hidden; background: var(--tile); }
.cover img { width: 100%; }

/* Case-study sections: sticky text on the left, images on the right */
.block { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: 28px 56px; padding-block: clamp(48px, 7vw, 88px); border-top: 1px solid var(--line); }
.block:first-of-type { border-top: 0; }
.block .copy { align-self: start; position: sticky; top: 96px; }
.block .copy h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); margin-bottom: 14px; }
.block .copy p, .block .copy li { color: var(--ink-2); }
.block .copy ol, .block .copy ul { padding-left: 1.2em; margin: 0 0 1em; }
.block .copy li { margin-bottom: 4px; }
.shots { display: grid; gap: 16px; min-width: 0; }
.block.solo { grid-template-columns: minmax(0, 1fr); }
.block.solo .copy { position: static; max-width: 62ch; }
@media (max-width: 860px) {
  .block { grid-template-columns: minmax(0, 1fr); }
  .block .copy { position: static; }
}

.grid-2, .grid-3, .grid-4 { display: grid; gap: 16px; align-items: start; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 760px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .grid-2, .grid-3 { grid-template-columns: minmax(0, 1fr); } }

figure { margin: 0; min-width: 0; }
figure img, figure video { width: 100%; border-radius: 8px; }
figcaption { font-size: 0.86rem; line-height: 1.45; color: var(--muted); margin-top: 8px; }
.tile { background: var(--tile); border-radius: 8px; padding: clamp(14px, 3vw, 28px); display: grid; place-items: center; }
.tile img { border-radius: 0; max-height: 360px; width: auto; }
.video { aspect-ratio: 16 / 9; width: 100%; border: 0; border-radius: 8px; background: #000; }
.note { font-size: 0.88rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 20px; margin-top: 8px; }
.text-link { font-weight: 700; text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 2px; }

.next { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-block: 40px clamp(64px, 9vw, 104px); border-top: 1px solid var(--line); }
.next a { font: 700 1.15rem/1.3 var(--display); text-decoration: none; }
.next a span { display: block; font: 700 0.74rem/1.3 var(--body); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.next a:hover { color: var(--accent); }

/* Illustration gallery */
.masonry { columns: 3 260px; column-gap: 16px; padding-bottom: clamp(64px, 9vw, 104px); }
.masonry figure { break-inside: avoid; margin-bottom: 22px; }

/* Projects page */
.section-title { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: clamp(40px, 6vw, 64px); margin-bottom: 22px; border-top: 1px solid var(--line); }
.section-title h2 { font-size: clamp(1.4rem, 2.6vw, 1.8rem); }
.section-title p { margin: 0; color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 32px 24px; margin-bottom: clamp(40px, 6vw, 64px); }
.card { display: flex; flex-direction: column; text-decoration: none; min-width: 0; }
.card .thumb { aspect-ratio: 4 / 3; border-radius: 8px; overflow: hidden; background: var(--tile); }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.card:hover .thumb img { transform: scale(1.03); }
.card .thumb.text { display: grid; align-content: end; padding: 20px; background: var(--ink); color: #fff; }
.card .thumb.text span { font: 700 1.6rem/1.1 var(--display); }
.card h3 { font-size: 1.2rem; margin-top: 14px; }
.card p { margin: 6px 0 0; color: var(--ink-2); font-size: 0.95rem; }
.card .kind { font-size: 0.8rem; color: var(--muted); margin-top: 8px; }
.card:hover h3 { color: var(--accent); }

/* About page */
.about { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 40px 64px; padding-bottom: clamp(64px, 9vw, 104px); }
.about .bio p { font-size: 1.08rem; color: var(--ink-2); max-width: 60ch; }
.about h2 { font-size: 1.3rem; margin: 40px 0 16px; }
.about h2:first-child { margin-top: 0; }
.timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.timeline li { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 4px 20px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.timeline .when { font-size: 0.88rem; color: var(--muted); }
.timeline b { display: block; }
.timeline span { color: var(--ink-2); font-size: 0.95rem; }
.facts dl { margin: 0; display: grid; gap: 14px; }
.facts dt { font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.facts dd { margin: 2px 0 0; color: var(--ink-2); }
@media (max-width: 860px) { .about { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 520px) { .timeline li { grid-template-columns: minmax(0, 1fr); } }

/* Writing list */
.writing { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); gap: 24px; margin-bottom: clamp(64px, 9vw, 104px); }
.writing a { text-decoration: none; }
.writing img { border-radius: 6px; aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.writing h3 { font-size: 1.05rem; margin-top: 10px; }
.writing p { font-size: 0.85rem; color: var(--muted); margin: 2px 0 0; }

/* Footer */
.site-foot { background: var(--ink); color: #e8e6e1; padding-block: clamp(56px, 8vw, 88px) 32px; }
.site-foot .eyebrow { color: #a3a9b4; }
.big-mail { display: inline-block; font: 700 clamp(1.5rem, 4.4vw, 2.8rem)/1.15 var(--display); letter-spacing: -0.02em; text-decoration: none; color: #fff; border-bottom: 3px solid var(--accent); padding-bottom: 4px; word-break: break-word; }
.big-mail:hover { color: #ffd9cb; }
.foot-links { display: flex; flex-wrap: wrap; gap: 10px 28px; list-style: none; margin: 32px 0 0; padding: 0; }
.foot-links a { color: #e8e6e1; }
.small { font-size: 0.82rem; color: #a3a9b4; margin-top: 48px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .panel .media img, .card .thumb img { transition: none; }
}