/* Unified review theme layer */
:root {
  --review-font: "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  --review-serif: "Noto Serif SC", "SimSun", "Songti SC", serif;
  --review-ink: #fffefb;
  --review-muted: rgba(255, 254, 251, 0.88);
  --review-panel: rgba(18, 17, 15, 0.72);
  --review-line: rgba(245, 239, 228, 0.22);
  --review-accent: #e8be5a;
  --review-accent-2: #c83838;
  --review-glow: rgba(232, 190, 90, 0.24);
}

html.review-theme {
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
}

html.review-theme body {
  position: relative;
  min-height: 100vh;
  color: var(--review-ink);
  font-family: var(--review-font);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.78;
  letter-spacing: 0.01em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: #0f0e0c;
}

html.review-theme h1,
html.review-theme h2,
html.review-theme h3,
html.review-theme .section-title,
html.review-theme .card-title {
  font-family: var(--review-serif);
  font-weight: 800;
  letter-spacing: 0;
  text-wrap: balance;
}

html.review-theme h1 {
  color: var(--review-ink);
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.34);
}

html.review-theme p,
html.review-theme li,
html.review-theme .card-desc,
html.review-theme .hero-sub,
html.review-theme .section-subtitle {
  color: var(--review-muted);
}

html.review-theme .branch {
  color: var(--ink, #1f1a17);
}

html.review-theme .branch-points li {
  color: var(--ink-soft, #665653);
}

html.review-theme a,
html.review-theme button,
html.review-theme .opt,
html.review-theme .card-link,
html.review-theme .mm-btn,
html.review-theme .mode-btn {
  font-family: var(--review-font);
  font-weight: 600;
  letter-spacing: 0;
}

html.review-theme .review-theme-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

html.review-theme .review-theme-backdrop::before,
html.review-theme .review-theme-backdrop::after {
  position: absolute;
  content: "";
}

html.review-theme .review-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10000;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--review-accent-2), var(--review-accent), #fff0c2);
  box-shadow: 0 0 18px var(--review-glow);
}

html.review-theme .review-theme-mark {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 9;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid var(--review-line);
  border-radius: 10px;
  background: rgba(12, 11, 10, 0.62);
  color: var(--review-accent);
  box-shadow: 0 18px 38px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(16px);
  pointer-events: none;
}

html.review-theme .review-theme-mark svg {
  width: 25px;
  height: 25px;
}

html.review-theme .card,
html.review-theme .q-card,
html.review-theme .kp,
html.review-theme .toc,
html.review-theme .mindmap-container,
html.review-theme .resource-card,
html.review-theme .content-wrap > main,
html.review-theme .mode-panel,
html.review-theme .question-card {
  border-color: var(--review-line) !important;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015)),
    var(--review-panel) !important;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(14px);
}

html.review-theme .card,
html.review-theme .q-card,
html.review-theme .kp,
html.review-theme .resource-card {
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease, background 220ms ease;
}

html.review-theme .card:hover,
html.review-theme .q-card:hover,
html.review-theme .kp:hover,
html.review-theme .resource-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--review-accent) 58%, transparent) !important;
  box-shadow: 0 22px 58px rgba(0, 0, 0, 0.3), 0 0 24px var(--review-glow);
}

html.review-theme .card-link,
html.review-theme .quick-links a,
html.review-theme .opt,
html.review-theme .mm-btn,
html.review-theme .mode-btn,
html.review-theme button {
  border-radius: 8px;
}

html.review-theme .opt:hover,
html.review-theme .option:hover,
html.review-theme .card-link:hover,
html.review-theme .quick-links a:hover,
html.review-theme .mm-btn:hover,
html.review-theme .mode-btn:hover,
html.review-theme button:hover {
  border-color: color-mix(in srgb, var(--review-accent) 68%, transparent) !important;
  box-shadow: 0 0 18px var(--review-glow);
}

html.review-theme .opt,
html.review-theme .option {
  position: relative;
  min-height: 38px;
  padding: 9px 14px 9px 42px !important;
  border: 1.5px solid color-mix(in srgb, var(--review-line) 82%, white 18%) !important;
  background: rgba(255, 255, 255, 0.045) !important;
  color: var(--review-ink) !important;
  line-height: 1.55;
  user-select: none;
}

html.review-theme .opt::before,
html.review-theme .option::before {
  position: absolute;
  left: 13px;
  top: 50%;
  display: grid;
  width: 18px;
  height: 18px;
  place-items: center;
  border: 1.5px solid color-mix(in srgb, var(--review-accent) 42%, white 10%);
  border-radius: 50%;
  color: transparent;
  background: rgba(255, 255, 255, 0.08);
  content: "";
  transform: translateY(-50%);
}

html.review-theme .opt:has(input[type="checkbox"])::before,
html.review-theme .option:has(input[type="checkbox"])::before {
  border-radius: 5px;
}

html.review-theme .opt.selected,
html.review-theme .option.selected,
html.review-theme .opt:has(input:checked),
html.review-theme .option:has(input:checked) {
  border-color: var(--review-accent) !important;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--review-accent) 22%, transparent), rgba(255, 255, 255, 0.09)) !important;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--review-accent) 34%, transparent), 0 14px 30px rgba(0, 0, 0, 0.2) !important;
  color: #fffbe6 !important;
  font-weight: 800;
  font-size: 1.02em;
}

html.review-theme .opt.selected::before,
html.review-theme .option.selected::before,
html.review-theme .opt:has(input:checked)::before,
html.review-theme .option:has(input:checked)::before {
  border-color: var(--review-accent);
  background: var(--review-accent);
  color: #181511;
  content: "✓";
  font-size: 12px;
  font-weight: 900;
}

html.review-theme .opt.correct,
html.review-theme .option.correct-answer {
  border-color: #35b779 !important;
  background: rgba(53, 183, 121, 0.18) !important;
  color: #eafff3 !important;
  box-shadow: 0 0 0 2px rgba(53, 183, 121, 0.22) !important;
}

html.review-theme .opt.correct::before,
html.review-theme .option.correct-answer::before {
  border-color: #35b779;
  background: #35b779;
  color: #082116;
  content: "✓";
  font-size: 12px;
  font-weight: 900;
}

html.review-theme .opt.wrong,
html.review-theme .option.wrong-answer {
  border-color: #ef5b5b !important;
  background: rgba(239, 91, 91, 0.16) !important;
  color: #ffe4e4 !important;
  opacity: 1 !important;
  text-decoration: none !important;
  box-shadow: 0 0 0 2px rgba(239, 91, 91, 0.2) !important;
}

html.review-theme .opt.wrong::before,
html.review-theme .option.wrong-answer::before {
  border-color: #ef5b5b;
  background: #ef5b5b;
  color: #2b0b0b;
  content: "×";
  font-size: 14px;
  font-weight: 900;
}

html.review-theme .result {
  border: 1px solid color-mix(in srgb, var(--review-accent) 34%, transparent) !important;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.09), color-mix(in srgb, var(--review-accent) 14%, transparent)) !important;
  color: var(--review-ink) !important;
}

html.review-theme .wrong-result,
html.review-theme .q-card.wrong .result {
  border-color: rgba(239, 91, 91, 0.35) !important;
  background: rgba(239, 91, 91, 0.12) !important;
}

html.review-theme #check-btn,
html.review-theme #grade-btn,
html.review-theme .btn {
  position: relative;
  z-index: 2;
}

html.review-theme .marx-portrait {
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(12, 11, 10, 0.2), rgba(12, 11, 10, 0.72)),
    url("karl-marx-portrait.jpg") center 18% / cover no-repeat !important;
}

html.review-theme .marx-portrait img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 18%;
  filter: sepia(0.18) contrast(1.06) brightness(0.94);
}

html.review-marx {
  --review-accent: #d8b06a;
  --review-accent-2: #b83232;
  --review-glow: rgba(184, 50, 50, 0.24);
}

html.review-marx .review-theme-backdrop::before,
html.review-portal .review-theme-backdrop::before {
  right: -4vw;
  bottom: -10vh;
  width: min(46vw, 520px);
  height: min(70vh, 720px);
  background:
    linear-gradient(90deg, rgba(15, 14, 12, 0.96), rgba(15, 14, 12, 0.18)),
    url("karl-marx-portrait.jpg") center top / cover no-repeat;
  opacity: 0.18;
  filter: sepia(0.28) saturate(0.85);
  mask-image: linear-gradient(90deg, transparent, #000 28%, #000 72%, transparent);
}

html.review-marx .review-theme-backdrop::after,
html.review-portal .review-theme-backdrop::after {
  inset: 0;
  background:
    radial-gradient(circle at 16% 16%, rgba(184, 50, 50, 0.14), transparent 34%),
    linear-gradient(115deg, rgba(216, 176, 106, 0.08), transparent 38%);
}

html.review-geo {
  --review-accent: #75c7b3;
  --review-accent-2: #2d7a4a;
  --review-glow: rgba(117, 199, 179, 0.22);
}

html.review-geo body {
  background:
    linear-gradient(180deg, rgba(4, 17, 17, 0.82), rgba(5, 16, 14, 0.94)),
    url("geo-atlas-bg.webp") center / cover fixed no-repeat #071514;
}

html.review-geo .review-theme-backdrop::before {
  inset: -18%;
  background:
    repeating-radial-gradient(circle at 18% 22%, rgba(117, 199, 179, 0.16) 0 1px, transparent 1px 34px),
    linear-gradient(135deg, rgba(45, 122, 74, 0.16), transparent 44%);
  opacity: 0.66;
}

html.review-geo .review-theme-backdrop::after {
  right: 5vw;
  top: 12vh;
  width: 320px;
  height: 320px;
  border: 1px solid rgba(117, 199, 179, 0.22);
  border-radius: 50%;
  background:
    radial-gradient(circle, transparent 0 38%, rgba(117, 199, 179, 0.08) 39% 40%, transparent 41%),
    conic-gradient(from 25deg, transparent, rgba(117, 199, 179, 0.18), transparent 38%);
  opacity: 0.7;
}

html.review-geo-notes {
  --review-ink: #17312d;
  --review-muted: #4f6964;
  --review-panel: rgba(255, 255, 255, 0.88);
  --review-line: rgba(35, 92, 82, 0.18);
  --review-accent: #16766d;
  --review-accent-2: #2d7a4a;
  --review-glow: rgba(22, 118, 109, 0.16);
}

html.review-geo-notes body {
  color: #17312d;
  background:
    linear-gradient(180deg, rgba(236, 247, 242, 0.9), rgba(216, 236, 226, 0.92)),
    url("geo-atlas-bg.webp") center / cover fixed no-repeat #e7f2ec !important;
}

html.review-geo-notes .review-theme-backdrop::before {
  inset: 0;
  background:
    repeating-radial-gradient(circle at 9% 12%, rgba(22, 118, 109, 0.16) 0 1px, transparent 1px 34px),
    linear-gradient(120deg, rgba(255, 255, 255, 0.58), transparent 44%);
  opacity: 0.9;
}

html.review-geo-notes .review-theme-backdrop::after {
  right: 4vw;
  top: 10vh;
  width: 360px;
  height: 360px;
  opacity: 0.22;
  border-color: rgba(22, 118, 109, 0.25);
}

html.review-geo-notes body > .main {
  position: relative;
  z-index: 1;
  max-width: 940px;
  margin: 32px auto 64px;
  padding: 34px 32px 48px;
  border: 1px solid rgba(35, 92, 82, 0.18);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(247, 252, 249, 0.9)),
    rgba(255, 255, 255, 0.92) !important;
  box-shadow: 0 24px 70px rgba(30, 82, 73, 0.18);
  backdrop-filter: blur(10px);
}

html.review-geo-notes h1 {
  color: #102f2a !important;
  border-bottom-color: rgba(22, 118, 109, 0.28) !important;
  text-shadow: none;
}

html.review-geo-notes h1::after {
  background: #16766d !important;
}

html.review-geo-notes h2 {
  color: #18463f !important;
  border-bottom-color: rgba(22, 118, 109, 0.26) !important;
  text-shadow: none;
}

html.review-geo-notes h2::before {
  background: #2d9b76 !important;
}

html.review-geo-notes .note,
html.review-geo-notes blockquote {
  color: #25443f !important;
  border-color: rgba(22, 118, 109, 0.18) !important;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(236, 248, 242, 0.95)) !important;
  box-shadow: 0 12px 26px rgba(30, 82, 73, 0.1);
}

html.review-geo-notes .note strong,
html.review-geo-notes blockquote strong {
  color: #0f6b5e !important;
}

html.review-geo-notes .review-theme-mark {
  background: rgba(255, 255, 255, 0.82);
  color: #16766d;
  border-color: rgba(22, 118, 109, 0.22);
}

html.review-xi {
  --review-accent: #ffd27d;
  --review-accent-2: #c62828;
  --review-glow: rgba(255, 210, 125, 0.2);
  --blue: #ffd27d;
  --green: #ffcf70;
  --red: #ff8a78;
  --gold: #ffd27d;
}

html.review-xi .review-theme-backdrop::before {
  inset: 0;
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 210, 125, 0.16), transparent 32%),
    radial-gradient(circle at 84% 12%, rgba(198, 40, 40, 0.18), transparent 34%),
    linear-gradient(135deg, rgba(198, 40, 40, 0.13), transparent 45%);
}

html.review-xi .review-theme-backdrop::after {
  right: 8vw;
  top: 12vh;
  width: 230px;
  height: 230px;
  background:
    linear-gradient(36deg, transparent 46%, rgba(255, 210, 125, 0.32) 47% 53%, transparent 54%),
    linear-gradient(108deg, transparent 46%, rgba(255, 210, 125, 0.32) 47% 53%, transparent 54%),
    linear-gradient(180deg, transparent 46%, rgba(255, 210, 125, 0.32) 47% 53%, transparent 54%);
  opacity: 0.22;
  transform: rotate(18deg);
}

html.review-xi main h2,
html.review-xi main h3,
html.review-xi body h2,
html.review-xi body h3,
html.review-xi .toc h2,
html.review-xi .toc h3,
html.review-xi .content-area h2,
html.review-xi .content-area h3 {
  color: #ffd27d !important;
  border-color: rgba(255, 210, 125, 0.66) !important;
  text-shadow: 0 0 18px rgba(198, 40, 40, 0.24);
}

html.review-xi .toc a,
html.review-xi .toc li,
html.review-xi .kp strong,
html.review-xi .card-title {
  color: #f5d18a !important;
}

html.review-xi main h2::before,
html.review-xi body h2::before,
html.review-xi .content-area h2::before {
  background: #c62828 !important;
}

html.review-xi .toc li::marker,
html.review-xi main li::marker {
  color: #ffcf70;
}

html.review-xi .tag-freq,
html.review-xi .tag-info,
html.review-xi .tag-key,
html.review-xi [class*="blue"],
html.review-xi [class*="green"] {
  border-color: rgba(255, 210, 125, 0.28) !important;
  background-color: rgba(198, 40, 40, 0.12) !important;
  color: #ffd27d !important;
}

html.review-xi a {
  color: #ffcf70 !important;
}

html.review-xi a:hover {
  color: #fff0c2 !important;
}

html.review-portal {
  --review-accent: #d8b06a;
  --review-accent-2: #b83232;
}

html.review-theme .review-symbol {
  position: fixed;
  z-index: 0;
  pointer-events: none;
  color: color-mix(in srgb, var(--review-accent) 32%, transparent);
  font-size: 15px;
  animation: reviewSymbolRise linear infinite;
}

@keyframes reviewSymbolRise {
  0% { transform: translate3d(0, 105vh, 0) rotate(0deg); opacity: 0; }
  12% { opacity: 0.58; }
  86% { opacity: 0.58; }
  100% { transform: translate3d(16px, -12vh, 0) rotate(32deg); opacity: 0; }
}

@media (max-width: 760px) {
  html.review-theme body {
    font-size: 16px;
  }

  html.review-theme .review-theme-mark {
    right: 12px;
    bottom: 12px;
    width: 40px;
    height: 40px;
  }

  html.review-marx .review-theme-backdrop::before,
  html.review-portal .review-theme-backdrop::before {
    width: 68vw;
    height: 50vh;
    opacity: 0.1;
  }

  html.review-geo .review-theme-backdrop::after,
  html.review-xi .review-theme-backdrop::after {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html.review-theme *,
  html.review-theme *::before,
  html.review-theme *::after {
    animation-duration: 0.001ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  html.review-theme .review-symbol {
    display: none;
  }
}