:root {
  --font-display: 'Noto Serif SC', serif;
  --font-body: 'Noto Sans SC', system-ui, sans-serif;
  --color-ink: oklch(15% 0.01 260);
  --color-ink-soft: oklch(40% 0.01 260);
  --color-ink-muted: oklch(55% 0.01 260);
  --color-paper: oklch(98.5% 0.005 90);
  --color-paper-warm: oklch(96% 0.015 85);
  --color-paper-alt: oklch(94% 0.01 90);
  --color-rule: oklch(88% 0.01 90);
  --color-accent: oklch(45% 0.12 25);
  --color-accent-soft: oklch(92% 0.04 25);
  --color-tag-green: oklch(92% 0.06 145);
  --color-tag-green-text: oklch(35% 0.1 145);
  --color-tag-amber: oklch(92% 0.08 85);
  --color-tag-amber-text: oklch(40% 0.12 70);
  --color-tag-rose: oklch(94% 0.05 10);
  --color-tag-rose-text: oklch(45% 0.12 10);
  --color-tag-violet: oklch(94% 0.04 300);
  --color-tag-violet-text: oklch(40% 0.1 300);
  --space-xs: 4px; --space-sm: 8px; --space-md: 16px; --space-lg: 24px; --space-xl: 32px; --space-2xl: 48px;
  --text-xs: 11px; --text-sm: 13px; --text-base: 15px; --text-lg: 17px; --text-xl: 20px; --text-2xl: 26px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 120ms; --dur-normal: 200ms;
  --radius-sm: 6px; --radius-md: 10px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); background: var(--color-paper); color: var(--color-ink); line-height: 1.6; -webkit-font-smoothing: antialiased; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 var(--space-lg); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--color-paper); border-bottom: 1px solid var(--color-rule); padding: var(--space-lg) 0; }
.header-inner { display: flex; flex-direction: column; gap: var(--space-md); }
.header-top { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: var(--space-sm); }
.site-title { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 700; color: var(--color-ink); letter-spacing: -0.02em; }
.site-meta { font-size: var(--text-xs); color: var(--color-ink-muted); letter-spacing: 0.02em; }

/* Search */
.search-wrap { position: relative; }
.search-input { width: 100%; padding: 12px 16px 12px 42px; font-size: var(--text-base); font-family: inherit; border: 1px solid var(--color-rule); border-radius: var(--radius-md); background: var(--color-paper); color: var(--color-ink); outline: none; transition: border-color var(--dur-fast), box-shadow var(--dur-fast); }
.search-input:focus { border-color: var(--color-ink-soft); box-shadow: 0 0 0 3px oklch(15% 0.01 260 / 0.06); }
.search-input::placeholder { color: var(--color-ink-muted); }
.search-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; color: var(--color-ink-muted); pointer-events: none; }

/* Navigation */
.nav-bar { display: flex; gap: var(--space-xs); overflow-x: auto; scrollbar-width: none; margin: 0 calc(-1 * var(--space-lg)); padding: 0 var(--space-lg); }
.nav-bar::-webkit-scrollbar { display: none; }
.nav-btn { padding: 8px 16px; font-size: var(--text-sm); font-weight: 500; font-family: inherit; color: var(--color-ink-soft); background: transparent; border: none; border-radius: var(--radius-sm); cursor: pointer; white-space: nowrap; transition: color var(--dur-fast), background var(--dur-fast); }
.nav-btn:hover { color: var(--color-ink); background: var(--color-paper-alt); }
.nav-btn.active { background: var(--color-ink); color: var(--color-paper); }
.nav-btn.nav-all { color: var(--color-accent); border: 1px solid var(--color-accent); }
.nav-btn.nav-all:hover, .nav-btn.nav-all.active { background: var(--color-accent); color: var(--color-paper); }

/* Main */
main { padding: var(--space-2xl) 0 100px; }

/* Section */
.brand-section { margin-bottom: var(--space-2xl); }
.brand-section[hidden] { display: none; }
.section-head { display: flex; align-items: baseline; gap: var(--space-md); padding-bottom: var(--space-md); border-bottom: 1px solid var(--color-rule); margin-bottom: var(--space-lg); }
.section-title { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; color: var(--color-ink); }
.section-count { font-size: var(--text-sm); color: var(--color-ink-muted); }

/* Cards */
.card-list { display: flex; flex-direction: column; gap: var(--space-md); }
.card { background: var(--color-paper); border: 1px solid var(--color-rule); border-radius: var(--radius-md); overflow: hidden; transition: box-shadow var(--dur-normal); }
.card:hover { box-shadow: 0 2px 12px oklch(15% 0.01 260 / 0.06); }
.card[hidden] { display: none; }
.card-header { display: flex; align-items: flex-start; gap: var(--space-md); padding: var(--space-lg); cursor: pointer; }
.card-index, .card-toggle { user-select: none; }
.card-header:hover { background: var(--color-paper-warm); }
.card-index { flex-shrink: 0; width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-size: var(--text-sm); font-weight: 600; color: var(--color-ink-soft); background: var(--color-paper-alt); border-radius: var(--radius-sm); }
.card-main { flex: 1; min-width: 0; }
.card-title { font-size: var(--text-lg); font-weight: 600; color: var(--color-ink); line-height: 1.4; margin-bottom: var(--space-sm); }
.card-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { padding: 3px 10px; font-size: var(--text-xs); font-weight: 500; border-radius: 4px; }
.tag-green { background: var(--color-tag-green); color: var(--color-tag-green-text); }
.tag-amber { background: var(--color-tag-amber); color: var(--color-tag-amber-text); }
.tag-rose { background: var(--color-tag-rose); color: var(--color-tag-rose-text); }
.tag-violet { background: var(--color-tag-violet); color: var(--color-tag-violet-text); }
.card-toggle { flex-shrink: 0; width: 24px; height: 24px; color: var(--color-ink-muted); transition: transform var(--dur-fast); }
.card.is-open .card-toggle { transform: rotate(180deg); }

/* Card Body */
.card-body { display: none; padding: 0 var(--space-lg) var(--space-lg); border-top: 1px solid var(--color-rule); }
.card.is-open .card-body { display: block; }
.info-block { padding: var(--space-md) 0; }
.info-block + .info-block { border-top: 1px solid var(--color-rule); }
.info-label { font-size: var(--text-sm); font-weight: 600; color: var(--color-ink); margin-bottom: var(--space-sm); display: flex; align-items: center; gap: var(--space-sm); }
.info-label svg { width: 16px; height: 16px; color: var(--color-ink-soft); }
.info-list { list-style: none; }
.info-list li { position: relative; padding: 4px 0 4px 16px; font-size: var(--text-sm); color: var(--color-ink-soft); line-height: 1.5; }
.info-list li::before { content: ''; position: absolute; left: 0; top: 11px; width: 4px; height: 4px; background: var(--color-ink-muted); border-radius: 50%; }
.info-block.is-warn { background: var(--color-accent-soft); margin: 0 calc(-1 * var(--space-lg)); padding: var(--space-md) var(--space-lg); }
.info-block.is-warn .info-label { color: var(--color-accent); }
.info-block.is-warn .info-list li::before { background: var(--color-accent); }

/* Table */
.table-wrap { overflow-x: auto; margin-top: var(--space-sm); }
table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); min-width: 480px; }
th { text-align: left; padding: 10px 12px; font-weight: 600; font-size: var(--text-xs); color: var(--color-ink-soft); background: var(--color-paper-alt); border-bottom: 1px solid var(--color-rule); text-transform: uppercase; letter-spacing: 0.04em; }
td { padding: 10px 12px; color: var(--color-ink-soft); border-bottom: 1px solid var(--color-rule); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--color-paper-warm); }

/* Footer */
.site-footer { padding: var(--space-xl) 0; border-top: 1px solid var(--color-rule); text-align: center; }
.footer-text { font-size: var(--text-xs); color: var(--color-ink-muted); }

/* Back to top */
.back-top { position: fixed; bottom: 24px; right: 24px; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--color-ink); color: var(--color-paper); border: none; border-radius: 50%; cursor: pointer; opacity: 0; visibility: hidden; transition: opacity var(--dur-normal), visibility var(--dur-normal), transform var(--dur-fast); box-shadow: 0 2px 8px oklch(15% 0.01 260 / 0.15); }
.back-top:hover { transform: translateY(-2px); }
.back-top.is-visible { opacity: 1; visibility: visible; }
.back-top svg { width: 20px; height: 20px; }

/* Edit Mode */
.edit-bar { display: flex; gap: var(--space-sm); align-items: center; }
.edit-btn { padding: 8px 16px; font-size: var(--text-sm); font-weight: 500; font-family: inherit; border-radius: var(--radius-sm); cursor: pointer; transition: all var(--dur-fast); }
.edit-toggle { background: transparent; border: 1px solid var(--color-rule); color: var(--color-ink-soft); }
.edit-toggle:hover { background: var(--color-paper-alt); color: var(--color-ink); }
.edit-toggle.is-editing { background: oklch(55% 0.15 145); border-color: oklch(55% 0.15 145); color: white; }
.edit-save { background: oklch(50% 0.12 145); border: none; color: white; display: none; }
.edit-save:hover { background: oklch(45% 0.12 145); }
.edit-save.is-visible { display: inline-flex; }
body.edit-mode .card-title, body.edit-mode .info-list li, body.edit-mode .section-title, body.edit-mode .section-count, body.edit-mode td { outline: 1px dashed oklch(70% 0.1 145); outline-offset: 2px; border-radius: 2px; min-height: 1.2em; }
body.edit-mode .card-title:focus, body.edit-mode .info-list li:focus, body.edit-mode .section-title:focus, body.edit-mode td:focus { outline: 2px solid oklch(55% 0.15 145); background: oklch(95% 0.03 145); }
body.edit-mode .tag { cursor: pointer; }
body.edit-mode .tag:hover { opacity: 0.7; }
.edit-notification { position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%); background: var(--color-ink); color: var(--color-paper); padding: 12px 24px; border-radius: var(--radius-md); font-size: var(--text-sm); opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s; z-index: 1000; }
.edit-notification.is-visible { opacity: 1; visibility: visible; }

/* Responsive */
@media (max-width: 640px) {
  :root { --text-2xl: 22px; --text-xl: 18px; --text-lg: 16px; }
  .container { padding: 0 var(--space-md); }
  .site-header { padding: var(--space-md) 0; }
  .nav-bar { margin: 0 calc(-1 * var(--space-md)); padding: 0 var(--space-md); }
  .card-header { padding: var(--space-md); }
  .card-body { padding: 0 var(--space-md) var(--space-md); }
  .info-block.is-warn { margin: 0 calc(-1 * var(--space-md)); padding: var(--space-md); }
  table { font-size: var(--text-xs); }
  th, td { padding: 8px 10px; }
}
:focus-visible { outline: 2px solid var(--color-ink); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition-duration: 0.01ms !important; } html { scroll-behavior: auto; } }