/* Source: Claude Design export — portfolio UI kit layer. Kept verbatim; site-specific additions live in site.css. */
/* UI Kit — Freddie Jiang portfolio site
   Inherits ../../colors_and_type.css; adds layout-only rules. */

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg-1);
  font-family: var(--font-mono);
  font-size: 15px;
  transition: background var(--dur-3) var(--ease-mech), color var(--dur-3) var(--ease-mech);
}

.app { min-height: 100vh; display: flex; flex-direction: column; }

/* ---------- TICKER / TITLE BLOCK ---------- */
.ticker {
  display: flex;
  justify-content: space-between;
  padding: 10px 32px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-4);
  border-bottom: 0.5px solid var(--rule);
}
.ticker .item::before { content: '+ '; color: var(--datum); }

/* ---------- NAV ---------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 32px;
  border-bottom: 0.5px solid var(--rule);
  background: var(--bg);
  position: sticky; top: 0; z-index: 50;
}
.nav-left { display: flex; align-items: baseline; gap: 16px; }
.nav-mark { font-weight: 500; font-size: 17px; letter-spacing: -0.01em; color: var(--fg-1); cursor: pointer; }
.nav-mark:hover { color: var(--datum); }
.nav-sub { font-size: 11px; letter-spacing: 0.12em; color: var(--fg-4); text-transform: uppercase; }
.nav-links { display: flex; gap: 28px; }
.nav-link {
  font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-2); cursor: pointer; padding: 4px 0;
  transition: color var(--dur-2) var(--ease-mech);
}
.nav-link:hover { color: var(--fg-1); }
.nav-link.active { color: var(--fg-1); border-bottom: 1px solid var(--datum); }
.nav-status { display: flex; align-items: center; gap: 8px; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.nav-status .dot { width: 6px; height: 6px; background: var(--datum); }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  padding: 96px 32px 64px;
  border-bottom: 0.5px solid var(--rule);
  overflow: hidden;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--hairline-faint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--hairline-faint) 1px, transparent 1px);
  background-size: 16px 16px;
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 1280px; margin: 0 auto; }
.hero-display {
  font-weight: 300;
  font-size: clamp(56px, 9vw, 128px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--fg-1);
  margin: 0;
}
.hero-sub {
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-2);
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.hero-sub .crosshair { width: 12px; height: 12px; position: relative; display: inline-block; }
.hero-sub .crosshair::before, .hero-sub .crosshair::after { content:''; position:absolute; background: var(--datum); }
.hero-sub .crosshair::before { left: 0; right: 0; top: 50%; height: 1px; }
.hero-sub .crosshair::after  { top: 0; bottom: 0; left: 50%; width: 1px; }
.hero-meta-row {
  display: flex; gap: 48px; margin-top: 64px;
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-3);
}
.hero-meta-row dt { color: var(--datum); margin-bottom: 4px; }
.hero-meta-row dt::before { content: '+ '; }
.hero-meta-row dd { margin: 0; color: var(--fg-1); font-size: 15px; letter-spacing: 0.02em; text-transform: none; font-variant-numeric: tabular-nums; }

/* ---------- SECTION HEADER ---------- */
.section { padding: 64px 32px; border-bottom: 0.5px solid var(--rule); }
.section-inner { max-width: 1280px; margin: 0 auto; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 0.5px solid var(--rule);
}
.section-head .num { font-size: 12px; letter-spacing: 0.1em; color: var(--fg-4); text-transform: uppercase; }
.section-head .num::before { content: '+ '; color: var(--datum); }
.section-head h2 { font-weight: 500; font-size: 32px; letter-spacing: -0.01em; }
.section-head .right { font-size: 12px; letter-spacing: 0.1em; color: var(--fg-4); text-transform: uppercase; font-variant-numeric: tabular-nums; }

/* ---------- WORK INDEX ---------- */
.filters { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.filter-chip {
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 8px 14px; border: 1px solid var(--fg-4);
  color: var(--fg-2); cursor: pointer;
  transition: all var(--dur-2) var(--ease-mech);
}
.filter-chip:hover { color: var(--fg-1); border-color: var(--fg-1); }
.filter-chip.active { background: var(--fg-1); color: var(--bg); border-color: var(--fg-1); }

/* ---------- WORK INDEX — photo-first ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: 24px;
  row-gap: 64px;
}
/* Featured tile takes full width */
.work-tile.span-12 { grid-column: span 12; }
.work-tile.span-6  { grid-column: span 6; }
.work-tile.span-4  { grid-column: span 4; }
.work-tile.span-8  { grid-column: span 8; }

.work-tile {
  cursor: pointer;
  display: flex;
  flex-direction: column;
  position: relative;
}
.work-tile .img {
  position: relative;
  aspect-ratio: 16 / 10;
  background-image:
    repeating-linear-gradient(45deg, transparent, transparent 6px, var(--hatch) 6px, var(--hatch) 7px);
  background-color: var(--bg-inset);
  border: 0.5px solid var(--rule);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--dur-2) var(--ease-mech);
}
.work-tile.span-12 .img { aspect-ratio: 21 / 9; }
.work-tile.span-4  .img { aspect-ratio: 4 / 5; }
.work-tile:hover .img { border-color: var(--rule-strong); }

/* Drawing-frame corner ticks on the photo plate */
.work-tile .img::before,
.work-tile .img::after {
  content: ''; position: absolute; width: 14px; height: 14px; pointer-events: none;
}
.work-tile .img::before {
  top: 10px; left: 10px;
  border-top: 1px solid var(--rule-strong);
  border-left: 1px solid var(--rule-strong);
}
.work-tile .img::after {
  bottom: 10px; right: 10px;
  border-bottom: 1px solid var(--rule-strong);
  border-right: 1px solid var(--rule-strong);
}

/* Top-of-image overlay strip — "drawing block" header */
.work-tile .img-strip {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-2);
  background: linear-gradient(to bottom, var(--scrim), var(--scrim-0));
  z-index: 2;
}
.work-tile .img-strip .left::before { content: '+ '; color: var(--datum); }

.work-tile .img-placeholder {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--fg-4);
  text-transform: uppercase;
}

/* Caption below image — drawing title block */
.work-tile .caption {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 24px;
  padding-top: 16px;
  border-top: 0.5px solid var(--rule);
  margin-top: 16px;
  align-items: baseline;
}
.work-tile .caption .title {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--fg-1);
  margin: 0;
  transition: color var(--dur-2) var(--ease-mech);
}
.work-tile.span-12 .caption .title { font-size: 36px; }
.work-tile.span-8  .caption .title { font-size: 28px; }
.work-tile:hover .caption .title { color: var(--datum); }

.work-tile .caption .year {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--fg-3);
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.work-tile .caption .meta {
  grid-column: 1 / -1;
  display: flex;
  gap: 18px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-top: 8px;
}
.work-tile .caption .meta span::before { content: '+ '; color: var(--datum); }
.work-tile .caption .arrow {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-2);
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color var(--dur-2) var(--ease-mech), gap var(--dur-2) var(--ease-mech);
}
.work-tile:hover .caption .arrow { color: var(--fg-1); gap: 14px; }

/* ---------- PROCESS / TICKER LIST ---------- */
.process-list { display: flex; flex-direction: column; }
.process-row {
  display: grid;
  grid-template-columns: 80px 1fr 200px 100px;
  gap: 32px;
  padding: 20px 0;
  border-bottom: 0.5px solid var(--rule);
  align-items: baseline;
  cursor: pointer;
  transition: padding var(--dur-2) var(--ease-mech);
}
.process-row:hover { padding-left: 12px; }
.process-row:hover .pr-title { color: var(--datum); }
.pr-num { font-size: 12px; letter-spacing: 0.08em; color: var(--fg-3); font-variant-numeric: tabular-nums; }
.pr-title { font-size: 20px; line-height: 1.3; font-weight: 500; color: var(--fg-1); transition: color var(--dur-2) var(--ease-mech); }
.pr-tags { display: flex; gap: 12px; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-4); }
.pr-tags span::before { content: '+ '; color: var(--datum); }
.pr-time { font-size: 13px; color: var(--fg-3); text-align: right; font-variant-numeric: tabular-nums; letter-spacing: 0.04em; }

/* ---------- ABOUT BLOCK ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 64px; }
.about-stat-list dl { margin: 0; display: flex; flex-direction: column; gap: 24px; }
.about-stat-list dt { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-4); }
.about-stat-list dt::before { content: '+ '; color: var(--datum); }
.about-stat-list dd { margin: 6px 0 0; font-size: 16px; color: var(--fg-1); font-variant-numeric: tabular-nums; }
.about-body p { font-size: 17px; line-height: 1.7; max-width: 64ch; text-wrap: pretty; color: var(--fg-2); margin: 0 0 18px; }
.about-body p:first-child { color: var(--fg-1); font-size: 20px; line-height: 1.55; }
.about-body em { color: var(--datum); font-style: normal; }

/* ---------- CONTACT ---------- */
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 32px 24px; max-width: 720px; }
.contact-form .full { grid-column: 1 / -1; }
.field-group { display: flex; flex-direction: column; gap: 8px; }
.field-group .label { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-4); display: flex; justify-content: space-between; }
.field-group .label .req { color: var(--datum); }
.field-group .label .req::before { content: '+ '; }
.field-group input,
.field-group textarea {
  background: transparent; border: none; border-bottom: 1px solid var(--rule-strong);
  padding: 10px 0; font-family: var(--font-mono); font-size: 16px; color: var(--fg-1); outline: none;
  resize: none;
  transition: border-color var(--dur-2) var(--ease-mech);
}
.field-group input:focus, .field-group textarea:focus { border-bottom-color: var(--datum); }

/* ---------- FOOTER ---------- */
.foot {
  padding: 32px;
  border-top: 0.5px solid var(--rule);
  display: flex;
  justify-content: space-between;
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--fg-4);
}
.foot .item::before { content: '+ '; color: var(--datum); }

/* ---------- DETAIL VIEW ---------- */
.detail { padding: 0; }
.detail-back {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-2); cursor: pointer; padding: 24px 32px;
}
.detail-back:hover { color: var(--datum); }
.detail-hero { padding: 64px 32px; border-top: 0.5px solid var(--rule); border-bottom: 0.5px solid var(--rule); position: relative; }
.detail-spec-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--rule);
  border: 0.5px solid var(--rule);
  margin-top: 48px;
}
.detail-spec {
  background: var(--bg); padding: 18px 20px;
  display: flex; flex-direction: column; gap: 10px;
}
.detail-spec dt { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-4); margin: 0; }
.detail-spec dt::before { content: '+ '; color: var(--datum); }
.detail-spec dd { margin: 0; font-size: 18px; color: var(--fg-1); font-variant-numeric: tabular-nums; letter-spacing: 0.02em; }

.detail-body { padding: 64px 32px; max-width: 760px; margin: 0 auto; }
.detail-body p { font-size: 17px; line-height: 1.7; text-wrap: pretty; color: var(--fg-2); margin: 0 0 18px; }
.detail-figures { padding: 0 32px 64px; max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.detail-fig {
  border: 0.5px solid var(--rule);
  aspect-ratio: 4/3;
  background-image:
    repeating-linear-gradient(45deg, transparent, transparent 6px, var(--hatch) 6px, var(--hatch) 7px);
  background-color: var(--bg-inset);
  position: relative;
}
.detail-fig::before {
  content: attr(data-fig);
  position: absolute; bottom: 12px; left: 14px;
  font-size: 11px; letter-spacing: 0.1em; color: var(--fg-3);
}

a { color: var(--fg-1); text-decoration-color: var(--rule-strong); }
a:hover { color: var(--datum); }