/* ═══════════════════════════════════════════════════════════════
   ROAM Lab — Project Index
   Shares the design language of the per-paper pages (reactemg template):
   Inter type, mono accents, hairline borders, warm-yellow highlight.
   Pure CSS, no JS.
   ═══════════════════════════════════════════════════════════════ */

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  --bg:             #ffffff;
  --bg-alt:         #fafafa;
  --bg-hero:        #f7f8fa;
  --text:           #1a1a1a;
  --text-muted:     #6b6b6b;
  --text-light:     #999;
  --border:         #e3e3e3;
  --border-strong:  #c8c8c8;
  --accent-warm:    #f2c200;
  --link:           #1a1a1a;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  --max-width:        980px;
  --radius:    4px;
  --radius-lg: 8px;

  --thumb-w: 176px;
  --thumb-h: 132px;   /* 4:3 */
}

/* ── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

img { max-width: 100%; display: block; border: 0; }

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
  transition: text-decoration-color .15s ease, color .15s ease;
}
a:hover { text-decoration-color: var(--text); }

::selection { background: #ffe169; color: #1a1a1a; }

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

/* ╔══════════════════════════════════════════════════════════╗
   ║  HERO                                                    ║
   ╚══════════════════════════════════════════════════════════╝ */
.hero {
  background: var(--bg);
  padding: 4.75rem 0 1.5rem;
  text-align: left;
}

.brand {
  font-size: clamp(2.5rem, 7vw, 3.9rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin: 0;
  color: var(--text);
}

.hero-desc {
  max-width: 640px;
  margin: 1.15rem 0 0;
  color: var(--text-muted);
  font-size: clamp(1.02rem, 1.6vw, 1.15rem);
  line-height: 1.6;
}

.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.6rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 2px;
  transition: border-color .15s ease;
}
.hero-link:hover { border-color: var(--text); text-decoration: none; }
.hero-link i { font-size: 0.82em; transition: transform .18s ease; }
.hero-link:hover i { transform: translateX(3px); }

/* ╔══════════════════════════════════════════════════════════╗
   ║  PROJECTS                                                ║
   ╚══════════════════════════════════════════════════════════╝ */
.projects { padding: 1.75rem 0 1rem; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin: 0 0 1.4rem;
}
.section-head h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.005em;
}
.section-head .rule { flex: 1; height: 1px; background: var(--border); }

/* ── Project rows ──────────────────────────────────────────── */
.project-list {
  display: flex;
  flex-direction: column;
}

.project-row {
  position: relative;
  display: grid;
  grid-template-columns: var(--thumb-w) 1fr;
  gap: 1.4rem;
  align-items: center;
  padding: 1.25rem 1rem 1.25rem 1.1rem;
  border-top: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: background .18s ease;
}
.project-list .project-row:last-child { border-bottom: 1px solid var(--border); }

/* warm accent bar that grows on hover (no layout shift) */
.project-row::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent-warm);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform .18s ease;
}
.project-row:hover { background: var(--bg-alt); text-decoration: none; }
.project-row:hover::before { transform: scaleY(1); }
.project-row:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: -2px;
}

/* Thumbnail */
.thumb {
  width: var(--thumb-w);
  height: var(--thumb-h);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #f2f2f2;
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}
.project-row:hover .thumb img { transform: scale(1.045); }

/* Monogram placeholder (no source image yet) */
.thumb.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, #f3f4f6 0%, #e9eaf0 100%);
  position: relative;
}
.thumb.placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, transparent 0 9px, rgba(0,0,0,.018) 9px 18px);
}
.thumb.placeholder span {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  color: var(--text-light);
  z-index: 1;
}

/* Row body */
.row-body { min-width: 0; }

.row-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}
.row-name {
  font-size: 1.16rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
  color: var(--text);
}
.row-name .arrow {
  display: inline-block;
  margin-left: 0.3rem;
  color: var(--text-light);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity .18s ease, transform .18s ease, color .18s ease;
}
.project-row:hover .row-name .arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--text);
}
.row-name .ext {
  font-size: 0.7em;
  margin-left: 0.35rem;
  color: var(--text-light);
  vertical-align: 1px;
}
.row-venue {
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  white-space: nowrap;
  padding-top: 0.1rem;
}

.row-title {
  margin: 0.3rem 0 0;
  color: var(--text);
  font-size: 0.99rem;
  line-height: 1.5;
}

.row-tags {
  margin-top: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  color: var(--text-light);
}
.row-tags .tag::after { content: '·'; margin: 0 0.5rem; color: var(--border-strong); }
.row-tags .tag:last-child::after { content: ''; margin: 0; }

/* ╔══════════════════════════════════════════════════════════╗
   ║  FOOTER                                                  ║
   ╚══════════════════════════════════════════════════════════╝ */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  margin-top: 3rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}
.site-footer p { margin: 0.35rem 0; }
.site-footer a {
  color: var(--text-muted);
  text-decoration: underline;
  text-decoration-color: var(--border);
}
.site-footer a:hover { color: var(--text); text-decoration-color: var(--text); }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 620px) {
  :root { --thumb-w: 104px; --thumb-h: 78px; }
  .hero { padding: 2.75rem 0 1rem; }
  .projects { padding: 1.25rem 0 0.5rem; }
  .project-row {
    gap: 1rem;
    padding: 1rem 0.5rem 1rem 0.75rem;
    align-items: start;
  }
  .row-head { flex-wrap: wrap; gap: 0.15rem 0.6rem; }
  .row-venue { margin-left: 0; flex-basis: 100%; order: 3; padding-top: 0; }
  .row-name { font-size: 1.05rem; }
  .row-title { font-size: 0.92rem; }
  .row-name .arrow { display: none; }
}

/* ── Print ─────────────────────────────────────────────────── */
@media print {
  .hero, .site-footer { background: #fff; }
  .project-row { break-inside: avoid; }
}