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

:root {
  --purple: #5e2d91;
  --purple-light: #6c5ce7;
  --purple-dark: #3c1a6b;
  --gray-50: #f8f9fa;
  --gray-100: #f1f3f5;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-500: #868e96;
  --gray-700: #495057;
  --gray-900: #212529;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--purple-light); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; width: 100%; }

/* ── Header ──────────────────────────────────────── */
.site-header {
  background: linear-gradient(135deg, var(--purple), var(--purple-dark));
  color: #fff;
  padding: 16px 0;
  position: sticky; top: 0; z-index: 100;
}
.site-header .container {
  display: flex; align-items: baseline; gap: 10px;
}
.logo {
  font-size: 22px; font-weight: 700; color: #fff; letter-spacing: -0.5px;
}
.logo:hover { text-decoration: none; opacity: 0.9; }
.subtitle { font-size: 14px; opacity: 0.8; }

/* ── Hero ─────────────────────────────────────────── */
.hero {
  padding: 40px 0 20px;
}
.hero h1 { font-size: 28px; font-weight: 700; }
.hero p { color: var(--gray-500); margin-top: 6px; }

/* ── Board Cards ──────────────────────────────────── */
.board-list { display: flex; flex-direction: column; gap: 12px; padding-bottom: 32px; }
.board-card {
  display: flex; align-items: center; gap: 16px;
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 20px 24px;
  transition: box-shadow 0.2s, border-color 0.2s;
  color: inherit;
}
.board-card:hover {
  box-shadow: 0 4px 16px rgba(94,45,145,0.1);
  border-color: var(--purple-light);
  text-decoration: none;
}
.board-card.coming { opacity: 0.6; pointer-events: none; }
.board-icon { flex-shrink: 0; color: var(--purple-light); }
.board-info { flex: 1; min-width: 0; }
.board-info h2 { font-size: 18px; display: flex; align-items: center; gap: 8px; }
.board-info p { color: var(--gray-500); font-size: 14px; margin-top: 4px; }
.tag {
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 4px;
  background: var(--gray-100); color: var(--gray-700);
}
.coming-tag { background: #fff3bf; color: #e67700; }
.arch-tag { background: #d3f9d8; color: #2b8a3e; }
.file-count { font-size: 13px; color: var(--gray-500); margin-top: 6px; display: inline-block; }
.arrow { flex-shrink: 0; color: var(--gray-300); }

/* ── Breadcrumb ────────────────────────────────────── */
.breadcrumb {
  padding: 20px 0;
  font-size: 14px;
  color: var(--gray-500);
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
}
.breadcrumb .sep { color: var(--gray-300); }
.breadcrumb .current { color: var(--gray-900); font-weight: 500; }

/* ── Board Hero ────────────────────────────────────── */
.board-hero { padding-bottom: 20px; }
.board-hero h1 { font-size: 24px; }
.board-hero p { color: var(--gray-500); margin-top: 4px; }

/* ── File Tree ─────────────────────────────────────── */
.file-tree {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 40px;
}
.tree-header {
  display: grid;
  grid-template-columns: 1fr 120px 180px;
  padding: 12px 16px;
  background: var(--gray-100);
  font-size: 12px; font-weight: 600; text-transform: uppercase;
  color: var(--gray-500);
  border-bottom: 1px solid var(--gray-200);
}
.tree-row {
  display: grid;
  grid-template-columns: 1fr 120px 180px;
  padding: 10px 16px;
  align-items: center;
  font-size: 14px;
  border-bottom: 1px solid var(--gray-100);
  transition: background 0.1s;
}
.tree-row:last-child { border-bottom: none; }
.tree-row:hover { background: var(--gray-50); }
.tree-row a {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--gray-900); font-weight: 500;
}
.tree-row a:hover { color: var(--purple-light); text-decoration: none; }
.tree-row.dir a { color: var(--purple-light); }
.tree-row .file-link { color: var(--gray-700); }
.tree-row svg { flex-shrink: 0; color: var(--gray-500); }
.tree-row.dir svg { color: var(--purple-light); }
.col-size, .col-mtime { color: var(--gray-500); font-size: 13px; }
.parent-dir { color: var(--gray-500) !important; }

/* ── Info Box ─────────────────────────────────────── */
.info-box {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 20px 24px; margin-bottom: 40px;
}
.info-box h3 { font-size: 16px; margin-bottom: 12px; }
.code-block {
  background: var(--gray-900); color: #a5d6ff; padding: 16px; border-radius: 6px;
  font-size: 13px; line-height: 1.8; overflow-x: auto;
}

/* ── Empty State ───────────────────────────────────── */
.empty-state { padding: 60px 20px; text-align: center; color: var(--gray-500); }

/* ── Footer ────────────────────────────────────────── */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--gray-200);
  padding: 16px 0;
  font-size: 13px; color: var(--gray-500);
}
.site-footer .container { display: flex; justify-content: space-between; align-items: center; }

/* ── Responsive ────────────────────────────────────── */
@media (max-width: 640px) {
  .tree-header, .tree-row {
    grid-template-columns: 1fr 90px;
  }
  .col-mtime { display: none; }
  .board-card { padding: 16px; }
}