:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: rgba(255, 255, 255, 0.72);
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-2: #2f6bff;
  --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  --radius: 16px;
  --font-base: 16px;
}

html[data-theme="dark"] {
  --bg: #0b1220;
  --surface: #0f1a2b;
  --surface-2: rgba(15, 26, 43, 0.68);
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: #243244;
  --primary: #3b82f6;
  --primary-2: #2563eb;
  --shadow: 0 10px 38px rgba(0, 0, 0, 0.45);
}

html[data-font="sm"] { --font-base: 12px; }
html[data-font="md"] { --font-base: 14px; }
html[data-font="lg"] { --font-base: 16px; }

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  font-size: var(--font-base);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--primary); }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: linear-gradient(180deg, rgba(255,255,255,0.78), rgba(255,255,255,0.55));
  border-bottom: 1px solid var(--border);
}

html[data-theme="dark"] .topbar {
  background: linear-gradient(180deg, rgba(11,18,32,0.78), rgba(11,18,32,0.55));
}

.topbar-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 14px 0;
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
}

.logo {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: transparent;
  box-shadow: none;
  overflow: hidden;
}

.logo img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.brand-name { font-weight: 800; line-height: 1.1; }
.brand-sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

.nav {
  display: flex;
  gap: 10px;
  justify-content: flex-start;
  flex-wrap: nowrap;
  overflow: hidden;
}

.nav a {
  padding: 8px 8px;
  border-radius: 12px;
  color: var(--text);
  white-space: nowrap;
  flex: 0 0 auto;
  text-align: center;
}

.nav .nav-text.compact { display: none; }
html[data-nav="compact"] .nav a:not([data-nosplit="1"]) .nav-text.normal[data-has-compact="1"] { display: none; }
html[data-nav="compact"] .nav a:not([data-nosplit="1"]) .nav-text.compact {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.05;
}

html[data-nav="compact"] .nav a {
  padding: 6px 6px;
  font-size: 13px;
}

html[data-nav="compact2"] .nav a {
  padding: 5px 5px;
  font-size: 12px;
}

.nav a[data-active="1"] {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.10);
}

.nav a:hover {
  background: rgba(37, 99, 235, 0.08);
}

.topbar-right {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  align-items: center;
}

.seg {
  display: inline-grid;
  grid-auto-flow: column;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-2);
}

.seg button {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 8px 10px;
  border-radius: 12px;
  cursor: pointer;
  color: var(--text);
  font-weight: 700;
  font-size: 13px;
}

.seg button[data-active="1"] {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 8px 18px rgba(0,0,0,0.06);
}

.icon-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: 14px;
  padding: 10px 12px;
  cursor: pointer;
}

.icon-btn svg {
  width: 18px;
  height: 18px;
  display: block;
}

.icon-btn .icon { display: none; }
html[data-theme="light"] .icon-btn .sun { display: block; }
html[data-theme="dark"] .icon-btn .moon { display: block; }
.icon-btn[data-action="toggle-menu"] .icon { display: block; }
html[data-menu="open"] .icon-btn[data-action="toggle-menu"] .hamburger { display: none; }
html:not([data-menu="open"]) .icon-btn[data-action="toggle-menu"] .close { display: none; }

.only-mobile { display: none; }
.only-desktop { display: inline-flex; }

.menu-panel {
  display: none;
  padding: 10px 0 14px;
}

.menu-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface-2);
}

.menu-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 10px;
  border-radius: 16px;
  font-weight: 900;
  background: transparent;
}

.menu-item:hover { background: rgba(37, 99, 235, 0.08); }

.menu-item[data-active="1"] {
  background: rgba(37, 99, 235, 0.14);
  color: var(--primary);
}

html[data-menu="open"] .menu-panel { display: block; }

.select {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: 14px;
  padding: 10px 12px;
  font-weight: 700;
}

.select:hover {
  border-color: rgba(37, 99, 235, 0.5);
  background: rgba(37, 99, 235, 0.08);
}

.icon-btn:hover {
  border-color: rgba(37, 99, 235, 0.5);
  background: rgba(37, 99, 235, 0.08);
}

.link-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 14px;
  font-size: 13px;
  font-weight: 700;
}

.chips {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 999px;
  font-weight: 800;
  font-size: 13px;
}

.chip:hover {
  border-color: rgba(37, 99, 235, 0.5);
  background: rgba(37, 99, 235, 0.08);
}

.chip[data-active="1"] {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border-color: rgba(37, 99, 235, 0.4);
}

.hero {
  padding: 28px 0 16px;
}

.hero-bg {
  border-radius: 24px;
  border: 1px solid var(--border);
  background: radial-gradient(1200px 280px at 50% 0%, rgba(37, 99, 235, 0.16), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,0.68), rgba(255,255,255,0.40));
  padding: 26px 18px;
}

html[data-theme="dark"] .hero-bg {
  background: radial-gradient(1200px 280px at 50% 0%, rgba(59, 130, 246, 0.22), transparent 60%),
    linear-gradient(180deg, rgba(15,26,43,0.72), rgba(15,26,43,0.45));
}

.hero-title {
  text-align: center;
  font-weight: 900;
  font-size: 34px;
  letter-spacing: 0.2px;
}

.hero-sub {
  text-align: center;
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.search {
  max-width: 720px;
  margin: 12px auto 0;
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 10px;
}

.input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  outline: none;
}

.input:focus {
  border-color: rgba(37, 99, 235, 0.6);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.btn {
  appearance: none;
  border: 1px solid rgba(37, 99, 235, 0.4);
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border-radius: 16px;
  padding: 12px 14px;
  font-weight: 800;
  cursor: pointer;
}

.btn:hover { filter: brightness(1.03); }

.grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.card {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
  box-shadow: var(--shadow);
}

.card-inner { padding: 14px; }

.cat-head {
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 900;
}

.dot {
  width: 34px;
  height: 34px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
}

.dot i { font-size: 16px; }

.list {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.list a {
  display: block;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.3;
}

.list a:hover { color: var(--primary); }

.section-title {
  margin: 28px 0 12px;
  font-weight: 900;
  font-size: 16px;
}

.articles {
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  box-shadow: var(--shadow);
}

.article {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  gap: 14px;
  padding: 16px;
  border-top: 1px solid var(--border);
}

.article:first-child { border-top: 0; }

.file {
  width: 30px;
  height: 30px;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-weight: 900;
}

.file i { font-size: 14px; }

.article-title { font-weight: 900; color: var(--primary); }
.article-title:hover { text-decoration: underline; }

.article-excerpt {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.article-date { text-align: right; color: var(--muted); font-size: 12px; padding-top: 2px; white-space: nowrap; }

.tag-link {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  font-weight: 800;
  font-size: 12px;
}

.tag-link:hover { border-color: rgba(37, 99, 235, 0.5); }

.tag-link { margin-right: 8px; }

.tag-total {
  color: var(--muted);
  font-weight: 900;
  font-size: 14px;
}

.crumb {
  color: var(--muted);
  font-weight: 900;
  font-size: 12px;
}

.crumb:hover { color: var(--primary); }

.crumb-sep { margin: 0 6px; color: var(--muted); }

.article-summary {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.article-actions { margin-top: 18px; }

.reaction-block { margin-top: 12px; }

.float-tools {
  position: fixed;
  right: 16px;
  bottom: 18px;
  z-index: 80;
  display: grid;
  gap: 10px;
}

.float-btn {
  width: 44px;
  height: 44px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.float-btn:hover {
  border-color: rgba(37, 99, 235, 0.5);
  background: rgba(37, 99, 235, 0.08);
}

.float-btn i { font-size: 16px; }

.reaction-row {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.reaction-msg {
  margin-top: 8px;
}

.prevnext-row {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.nav-link {
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 16px;
  padding: 12px 14px;
  display: grid;
  gap: 6px;
}

.nav-link:hover { border-color: rgba(37, 99, 235, 0.5); }

.nav-link.empty { opacity: 0.55; }

.nav-label { font-size: 12px; font-weight: 900; color: var(--muted); }

.nav-title {
  font-weight: 900;
  font-size: 14px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.reaction-row .icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.reaction-row .icon-btn[data-active="1"] {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border-color: rgba(37, 99, 235, 0.4);
}

.reaction-row .icon-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.reaction-row .count { font-weight: 900; font-size: 13px; }

.reaction-msg {
  min-height: 16px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}


.pager {
  margin: 14px 0 40px;
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.pager a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-2);
  color: var(--text);
  font-weight: 800;
  font-size: 13px;
}

.pager a[data-active="1"] {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border-color: rgba(37, 99, 235, 0.4);
}

.pagination {
  margin: 14px 0 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.pagination-total {
  color: var(--muted);
  font-weight: 800;
  font-size: 13px;
}

.pagination-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.pagination-links a,
.pagination-links span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-2);
  color: var(--text);
  font-weight: 800;
  font-size: 13px;
}

.pagination-links a[data-active="1"] {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border-color: rgba(37, 99, 235, 0.4);
}

.pagination-links .disabled {
  opacity: 0.5;
}

.pagination-links .ellipsis {
  border-color: transparent;
  background: transparent;
  min-width: auto;
  padding: 0 4px;
}

.pagination-jump {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.pagination-label {
  color: var(--muted);
  font-weight: 800;
  font-size: 13px;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  color: var(--muted);
  font-size: 13px;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-meta { margin-top: 10px; text-align: center; }

@media (max-width: 1100px) {
  .topbar-right { justify-content: flex-end; flex-wrap: nowrap; }
}

@media (max-width: 760px) {
  .brand-sub { display: none; }
  .brand-name { font-size: 14px; }
  .topbar-right { gap: 8px; }
  .nav { display: none; }
  .only-desktop { display: none; }
  .only-mobile { display: inline-flex; }
  .menu-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 1020px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .article { grid-template-columns: 30px 1fr auto; }
  .prevnext-row { grid-template-columns: 1fr; }
}