:root {
  --bg: #F7F5F0;
  --surface: #FFFFFF;
  --surface-raised: #FFFDF9;
  --ink: #211F1A;
  --ink-soft: #63604F;
  --ink-faint: #918D78;
  --line: #E3DECE;
  --line-strong: #CFC8AE;
  --accent: #D9601F;
  --accent-strong: #B84E15;
  --accent-ink: #FFFFFF;
  --accent-soft: #F7E1CD;
  --good: #3E7A4F;
  --warn: #B8862B;
  --bad: #B8412F;
  --shadow: 0 1px 2px rgba(33, 31, 26, 0.06), 0 6px 20px -8px rgba(33, 31, 26, 0.18);
  --font-display: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "Noto Serif JP", serif;
  --font-body: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-mono: "SF Mono", "Consolas", "Menlo", "Yu Gothic", monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16150F;
    --surface: #1E1C15;
    --surface-raised: #26231A;
    --ink: #EFEADA;
    --ink-soft: #B3AC94;
    --ink-faint: #7C7863;
    --line: #35311F;
    --line-strong: #464028;
    --accent: #F08A3C;
    --accent-strong: #FFA35C;
    --accent-ink: #1A1207;
    --accent-soft: #3C2A15;
    --good: #6FBE85;
    --warn: #D9A94A;
    --bad: #E27A64;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 28px -10px rgba(0, 0, 0, 0.55);
  }
}

:root[data-theme="dark"] {
  --bg: #16150F;
  --surface: #1E1C15;
  --surface-raised: #26231A;
  --ink: #EFEADA;
  --ink-soft: #B3AC94;
  --ink-faint: #7C7863;
  --line: #35311F;
  --line-strong: #464028;
  --accent: #F08A3C;
  --accent-strong: #FFA35C;
  --accent-ink: #1A1207;
  --accent-soft: #3C2A15;
  --good: #6FBE85;
  --warn: #D9A94A;
  --bad: #E27A64;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 28px -10px rgba(0, 0, 0, 0.55);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px 64px;
}

/* ---------- Header ---------- */

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 0 18px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand-mark .accent-dot {
  color: var(--accent);
}

.brand-tagline {
  font-size: 12.5px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
}

@media (max-width: 600px) {
  .brand {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .brand-mark {
    font-size: clamp(22px, 7.5vw, 30px);
  }

  .brand-tagline {
    white-space: normal;
  }
}

.header-meta {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  color: var(--ink-soft);
  text-align: right;
}

/* ---------- Hero / search ---------- */

.hero {
  padding: 34px 0 30px;
  border-bottom: 1px solid var(--line);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  margin: 0 0 8px;
}

.hero-title-seg {
  white-space: nowrap;
}

.hero-greeting {
  font-size: 13.5px;
  color: var(--ink-faint);
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

.hero-sub {
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 0 0 22px;
  max-width: 62ch;
}

.search-form {
  display: flex;
  max-width: 620px;
  border: 1.5px solid var(--line-strong);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.search-engine-select {
  border: none;
  border-right: 1px solid var(--line);
  background: var(--surface-raised);
  padding: 0 12px;
  font-size: 13px;
  font-family: var(--font-body);
  color: var(--ink-soft);
  outline: none;
  cursor: pointer;
  flex-shrink: 0;
}

.search-form input[type="text"] {
  flex: 1;
  border: none;
  background: transparent;
  padding: 12px 14px;
  font-size: 14.5px;
  font-family: var(--font-body);
  color: var(--ink);
  outline: none;
}

.search-form input[type="text"]::placeholder {
  color: var(--ink-faint);
}

.search-form button {
  border: none;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0 20px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  letter-spacing: 0.04em;
}

.search-form button:hover { background: var(--accent-strong); }

.search-form button:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- Layout ---------- */

.layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  grid-template-areas:
    "quick main"
    "more  main";
  gap: 32px;
  padding-top: 32px;
  align-items: start;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "quick"
      "main"
      "more";
  }
}

.tools-quick,
.tools-more {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tools-quick { grid-area: quick; }

.tools-more { grid-area: more; }

.sections { grid-area: main; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 16px 18px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 700;
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title .card-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  font-weight: 400;
  letter-spacing: 0.05em;
}

/* -- clock card -- */

.clock-time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 34px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
}

.clock-date {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

.clock-era {
  margin-top: 4px;
  font-size: 12px;
  color: var(--ink-faint);
  font-family: var(--font-mono);
}

/* -- calendar card -- */

.cal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.cal-nav-btn {
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  color: var(--ink-soft);
  width: 26px;
  height: 26px;
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
}

.cal-nav-btn:hover { border-color: var(--accent); color: var(--accent); }

.cal-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
  text-align: center;
}

.cal-grid .dow {
  font-size: 10.5px;
  color: var(--ink-faint);
  padding-bottom: 4px;
}

.cal-grid .dow:first-child { color: var(--bad); }
.cal-grid .dow:last-child { color: #4472C4; }

.cal-cell {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  padding: 5px 0;
  border-radius: 5px;
  color: var(--ink);
}

.cal-cell.blank { visibility: hidden; }
.cal-cell.sun { color: var(--bad); }
.cal-cell.sat { color: #4472C4; }
.cal-cell.holiday {
  background: var(--bad);
  color: var(--accent-ink);
  font-weight: 700;
  cursor: help;
}
.cal-cell.today {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
}

/* -- calc card -- */

.calc-display {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  margin-bottom: 8px;
  overflow-x: auto;
  white-space: nowrap;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.calc-grid button {
  padding: 10px 0;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--surface-raised);
  color: var(--ink);
  font-size: 14px;
  font-family: var(--font-mono);
  cursor: pointer;
}

.calc-grid button:hover { border-color: var(--accent); }

.calc-grid button.op { color: var(--accent-strong); font-weight: 700; }
.calc-grid button.wide { grid-column: span 2; }
.calc-grid button.eq {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
  font-weight: 700;
}

/* -- generic field rows -- */

.field-row {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 8px;
}

.field-row label {
  font-size: 12px;
  color: var(--ink-soft);
  width: 62px;
  flex-shrink: 0;
}

.field-row input[type="number"],
.field-row select {
  flex: 1;
  min-width: 0;
  padding: 7px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface-raised);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
}

.tool-btn {
  width: 100%;
  padding: 9px 0;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  margin-bottom: 8px;
}

.tool-btn:hover { background: var(--accent-strong); border-color: var(--accent-strong); }

.tool-result {
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--accent-soft);
  border-radius: 6px;
  font-size: 13px;
  color: var(--ink);
}

.tool-result strong {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--accent-strong);
}

.tool-hint {
  font-size: 11.5px;
  color: var(--ink-faint);
  margin-top: 6px;
}

/* ---------- Link sections ---------- */

.sections-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 4px;
}

.sections-head h2 {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 0;
}

.sections-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}

.link-toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 16px;
}

.link-filter-input {
  flex: 1;
  min-width: 220px;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  font-size: 13.5px;
  font-family: var(--font-body);
  outline: none;
}

.link-filter-input::placeholder { color: var(--ink-faint); }

.sort-toggle {
  display: flex;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  overflow: hidden;
  flex-shrink: 0;
}

.sort-btn {
  border: none;
  background: var(--surface);
  color: var(--ink-soft);
  padding: 9px 15px;
  font-size: 12.5px;
  font-family: var(--font-body);
  cursor: pointer;
}

.sort-btn + .sort-btn { border-left: 1px solid var(--line-strong); }

.sort-btn.is-active {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}

.link-empty {
  color: var(--ink-faint);
  font-size: 13px;
  padding: 28px 0;
  text-align: center;
}

.link-count {
  font-family: var(--font-mono);
  font-size: 10px;
  opacity: 0.65;
  margin-left: 1px;
}

.cat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 18px;
}

@media (max-width: 620px) {
  .cat-grid { grid-template-columns: 1fr; }
}

.cat-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 18px 20px;
  border-top: 3px solid var(--cat-color, var(--accent));
}

.cat-heading {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.cat-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cat-color, var(--accent));
  font-weight: 700;
}

.cat-title {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  margin: 0;
}

.cat-desc {
  font-size: 12.5px;
  color: var(--ink-soft);
  margin: 4px 0 12px;
}

.cat-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cat-links a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 12.5px;
  text-decoration: none;
  color: var(--ink);
  background: var(--surface-raised);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.cat-links a:hover {
  border-color: var(--cat-color, var(--accent));
  color: var(--cat-color, var(--accent));
  background: var(--accent-soft);
}

.cat-links a::after {
  content: "↗";
  font-size: 10px;
  opacity: 0.55;
}

/* ---------- Footer ---------- */

.site-footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}