/* =============================================================================
   Deep Research — index page only.
   Design language mirrors krisyotam/share + krisyotam/tools.
   Independent of static/style.css (which still styles entry pages).
   ============================================================================= */

:root {
  --bg:         0 0% 100%;
  --fg:         0 0% 20%;
  --fg-dim:     0 0% 35%;
  --muted:      0 0% 92%;
  --muted-fg:   0 0% 50%;
  --border:     0 0% 88%;
  --rule:       0 0% 82%;
  --accent:     0 0% 96%;

  --serif: 'Lora', ui-serif, Georgia, Cambria, 'Times New Roman', serif;
  --sans:  'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono:  'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --bg:         0 0% 7%;
  --fg:         0 0% 96%;
  --fg-dim:     0 0% 78%;
  --muted:      0 0% 12%;
  --muted-fg:   0 0% 60%;
  --border:     0 0% 17%;
  --rule:       0 0% 22%;
  --accent:     0 0% 11%;
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]):not([data-theme="dark"]) {
    color-scheme: dark;
    --bg:         0 0% 7%;
    --fg:         0 0% 96%;
    --fg-dim:     0 0% 78%;
    --muted:      0 0% 12%;
    --muted-fg:   0 0% 60%;
    --border:     0 0% 17%;
    --rule:       0 0% 22%;
    --accent:     0 0% 11%;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { background: hsl(var(--bg)); color: hsl(var(--fg)); }
body {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.page { min-height: 100vh; min-height: 100dvh; display: flex; flex-direction: column; }
.grow { flex-grow: 1; }
.shell { width: 100%; max-width: 640px; margin: 0 auto; padding: 80px 32px 56px; }

/* ── header ──────────────────────────────────────────────────── */
.head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
}
.brand h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 32px;
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin-bottom: 6px;
}
.brand p {
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: hsl(var(--muted-fg));
}

/* ── toggle ──────────────────────────────────────────────────── */
.toggle {
  appearance: none;
  background: transparent;
  border: 1px solid hsl(var(--border));
  color: hsl(var(--fg-dim));
  width: 32px; height: 32px;
  border-radius: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}
.toggle:hover { background: hsl(var(--accent)); color: hsl(var(--fg)); border-color: hsl(var(--rule)); }
.toggle svg { width: 16px; height: 16px; }
.toggle .icon-sun { display: none; }
.toggle .icon-moon { display: block; }
[data-theme="dark"] .toggle .icon-sun { display: block; }
[data-theme="dark"] .toggle .icon-moon { display: none; }

/* ── small nav row (about · faq · graph) ─────────────────────── */
.nav-row {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 32px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: hsl(var(--muted-fg));
}
.nav-row a {
  color: hsl(var(--muted-fg));
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 120ms ease, border-color 120ms ease;
}
.nav-row a:hover { color: hsl(var(--fg)); border-bottom-color: hsl(var(--rule)); }

/* ── search ──────────────────────────────────────────────────── */
.search { position: relative; margin-bottom: 28px; }
.search input {
  width: 100%;
  appearance: none;
  background: transparent;
  border: none;
  border-bottom: 1px solid hsl(var(--rule));
  padding: 10px 0 10px 22px;
  font-family: var(--sans);
  font-size: 15px;
  color: hsl(var(--fg));
  outline: none;
  transition: border-color 150ms ease;
}
.search input:focus { border-color: hsl(var(--fg-dim)); }
.search input::placeholder { color: hsl(var(--muted-fg)); }
.search-icon { position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 14px; height: 14px; color: hsl(var(--muted-fg)); pointer-events: none; }
.search-kbd {
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 11px;
  color: hsl(var(--muted-fg));
  background: hsl(var(--accent));
  border: 1px solid hsl(var(--border));
  border-radius: 3px;
  padding: 2px 6px;
  pointer-events: none;
}
.search input:focus + .search-kbd { display: none; }

/* ── single-column table of entry names ──────────────────────── */
table.entries {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  table-layout: fixed;
}
table.entries tbody tr { transition: background 100ms ease; }
table.entries tbody tr:hover { background: hsl(var(--accent)); }
table.entries tbody td {
  padding: 10px 16px 10px 8px;
  vertical-align: middle;
  border: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
table.entries tbody td:first-child { padding-left: 8px; }
table.entries tbody td:last-child  { padding-right: 8px; }

td.name a {
  color: hsl(var(--fg));
  font-weight: 500;
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease;
}
td.name a:hover { border-bottom-color: hsl(var(--rule)); }

tr.hidden { display: none; }

.empty {
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: hsl(var(--muted-fg));
  padding: 28px 8px;
  display: none;
}
.empty.show { display: block; }

/* ── footer (floored) ────────────────────────────────────────── */
footer.shell-footer {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 32px 28px;
}
.foot-inner {
  padding-top: 18px;
  border-top: 1px solid hsl(var(--rule));
  font-family: var(--mono);
  font-size: 11px;
  color: hsl(var(--muted-fg));
  display: flex;
  justify-content: space-between;
}
footer.shell-footer a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: hsl(var(--border));
}
footer.shell-footer a:hover { text-decoration-color: hsl(var(--muted-fg)); }

@media (max-width: 560px) {
  .shell { padding: 56px 22px 40px; }
  footer.shell-footer { padding: 12px 22px 24px; }
}