:root {
  --bg: #f4f1ea;
  --bg-soft: #fffdf8;
  --ink: #1d2330;
  --ink-soft: #475063;
  --line: #d8d2c6;
  --card: #ffffff;
  --accent: #0f766e;
  --accent-2: #9a3412;
  --font-body: "IBM Plex Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-heading: "IBM Plex Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --font-size-base: 16px;
  --radius-card: 14px;
  --radius-pill: 999px;
  --table-head-bg: #f7f5ef;
  --link-weight: 600;
  --fx-spot-1: rgba(15, 118, 110, 0.12);
  --fx-spot-2: rgba(154, 52, 18, 0.14);
  --shadow: 0 8px 30px rgba(16, 24, 40, 0.11);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 10%, var(--fx-spot-1), transparent 30%),
    radial-gradient(circle at 90% 92%, var(--fx-spot-2), transparent 24%),
    var(--bg);
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; font-weight: var(--link-weight); }
a:hover { text-decoration: underline; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 250, 242, 0.88);
}

.header-inner {
  max-width: 1460px;
  margin: 0 auto;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  justify-content: space-between;
}

.home-link {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  text-transform: uppercase;
  font-weight: 700;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: flex-start;
}

.top-nav a,
.top-nav summary {
  padding: 6px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  font-size: 0.86rem;
  color: var(--accent);
  font-weight: var(--link-weight);
}

.top-nav summary {
  cursor: pointer;
  list-style: none;
}

.top-nav summary::-webkit-details-marker {
  display: none;
}

.top-nav .nav-group {
  position: relative;
}

.top-nav .nav-submenu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 240px;
  max-height: 65vh;
  overflow: auto;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  box-shadow: var(--shadow);
  z-index: 50;
}

.top-nav .nav-group[open] > .nav-submenu {
  display: grid;
  gap: 6px;
}

.top-nav .nav-submenu .nav-group {
  position: relative;
}

.top-nav .nav-submenu .nav-group > .nav-submenu {
  left: calc(100% + 6px);
  top: 0;
}

.top-nav .nav-submenu a,
.top-nav .nav-submenu summary {
  display: block;
  width: 100%;
  border-radius: 10px;
  background: #fff;
}

.layout {
  max-width: 1460px;
  margin: 0 auto;
  padding: 18px;
  display: grid;
  grid-template-columns: minmax(230px, 320px) 1fr;
  gap: 20px;
}

.sidebar,
.content,
.site-footer {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
}

.sidebar {
  padding: 16px;
  position: sticky;
  top: 72px;
  align-self: start;
}

.hero-logo {
  width: 100%;
  max-height: 120px;
  object-fit: contain;
  display: block;
  padding: 8px;
  background: linear-gradient(160deg, #f7efe2, #f2f9f7);
  border-radius: 10px;
  border: 1px solid var(--line);
}

h1, h2, h3 { line-height: 1.2; margin: 0; font-family: var(--font-heading); }
.sidebar h1 { margin-top: 12px; font-size: 1.4rem; }
.subtitle { color: var(--ink-soft); margin: 8px 0 12px; font-size: 0.95rem; }

.toc h2 { font-size: 0.92rem; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-soft); }
.toc ol { margin: 0; padding-left: 18px; display: grid; gap: 5px; }

.content { padding: 18px; overflow-x: auto; }
.content section { margin-bottom: 24px; }
.content section h2 {
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
  font-size: 1.15rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

th, td {
  border-bottom: 1px solid var(--line);
  padding: 8px 10px;
  vertical-align: top;
  text-align: left;
  font-size: 0.9rem;
}

th {
  background: var(--table-head-bg);
  position: sticky;
  top: 0;
  z-index: 2;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:hover td { background: #fffcf7; }

.favicon {
  width: 14px;
  height: 14px;
  margin-right: 6px;
  vertical-align: text-top;
  border-radius: 2px;
}

.inline-list {
  margin: 0;
  padding-left: 18px;
  columns: 2;
  column-gap: 24px;
}

.inline-list li { margin: 4px 0; }

.pill-row { display: flex; flex-wrap: wrap; gap: 6px; }
.pill {
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 0.76rem;
  background: #faf8f2;
}

.breadcrumbs {
  font-size: 0.92rem;
  color: var(--ink-soft);
  word-break: break-word;
}

.muted { color: var(--ink-soft); font-size: 0.9rem; }

.site-footer {
  max-width: 1460px;
  margin: 0 auto 20px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-footer img {
  width: 18px;
  height: 18px;
  image-rendering: pixelated;
}

body,
.site-header,
.sidebar,
.content,
.site-footer,
.top-nav a,
.top-nav summary,
.card-link,
.table-wrap,
th,
td,
.hero-logo {
  transition: background-color 0.24s ease, color 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

@media (max-width: 1080px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .inline-list { columns: 1; }
}

@media (max-width: 720px) {
  .header-inner { flex-direction: column; align-items: stretch; }
  .top-nav { justify-content: flex-start; }
  .top-nav .nav-group { width: 100%; }
  .top-nav .nav-submenu,
  .top-nav .nav-submenu .nav-group > .nav-submenu {
    position: static;
    min-width: 0;
    max-height: none;
    box-shadow: none;
    border-radius: 0;
    padding: 6px 0 0 10px;
    border: 0;
    background: transparent;
  }
  .content { padding: 12px; }
}


.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.card-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  background: linear-gradient(160deg, #fffef9, #f4fbf9);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

.card-link strong {
  color: var(--accent-2);
  font-size: 0.95rem;
}

.card-link span {
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.url-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  word-break: break-all;
}

.table-empty {
  color: var(--ink-soft);
  font-style: italic;
}

.thumb-link {
  display: inline-flex;
  align-items: center;
}

.thumb-image {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #f4f4f4;
}