/* gpuqviz 站点统一样式 —— 与播放器暗色主题保持一致 */

:root {
  --bg: #0b0e14;
  --panel: #12161f;
  --panel2: #161b26;
  --fg: #e6ebf5;
  --dim: #8a94a6;
  --accent: #4dc5f2;
  --accent2: #f5a641;
  --border: #232a38;
  --code-bg: #1a2130;
  --green: #6bcb77;
  --font: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Consolas", "SF Mono", "DejaVu Sans Mono", monospace;
  --max-w: 1200px;
  --radius: 12px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 { font-weight: 600; line-height: 1.3; }
h1 { font-size: 2.4rem; }
h2 { font-size: 1.7rem; margin-top: 2.5em; }
h3 { font-size: 1.25rem; margin-top: 2em; color: var(--fg); }

p { margin: 0.6em 0 1em; }

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--accent);
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.55;
}

pre code {
  background: none;
  padding: 0;
  color: var(--fg);
  font-size: inherit;
}

/* ─── 导航栏 ─── */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 56px;
  display: flex;
  align-items: center;
  background: rgba(18, 22, 31, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}

.navbar .nav-inner {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}
.navbar .brand:hover { text-decoration: none; }
.navbar .brand .logo { font-size: 1.4rem; }

.navbar .nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar .nav-links a {
  color: var(--dim);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color .15s;
}
.navbar .nav-links a:hover,
.navbar .nav-links a.active {
  color: var(--fg);
  text-decoration: none;
}

.navbar .nav-links .gh-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color .15s, background .15s;
}
.navbar .nav-links .gh-link:hover {
  border-color: var(--accent);
  background: var(--code-bg);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  font-size: 1.3rem;
  padding: 4px 12px;
  cursor: pointer;
}

/* ─── 通用容器 ─── */

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 64px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 {
  margin-top: 0;
}
.section-header p {
  color: var(--dim);
  font-size: 1.05rem;
}

/* ─── Hero ─── */

.hero {
  text-align: center;
  padding: 80px 0 40px;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: 1.2rem;
  color: var(--dim);
  max-width: 640px;
  margin: 0 auto 32px;
}

.hero .cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 48px;
}

.hero-demo {
  max-width: 900px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.hero-demo iframe {
  width: 100%;
  height: 720px;
  border: none;
  display: block;
}

/* ─── 按钮 ─── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform .12s, box-shadow .15s, background .15s;
  text-decoration: none;
  border: none;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(77, 197, 242, 0.35);
}

.btn-secondary {
  background: var(--code-bg);
  color: var(--fg);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent);
  background: var(--panel2);
}

/* ─── 特性卡片网格 ─── */

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color .15s, transform .15s;
}
.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.feature-card .icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}
.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}
.feature-card p {
  margin: 0;
  color: var(--dim);
  font-size: 0.9rem;
}

/* ─── 算法标签云 ─── */

.algo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.algo-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 500;
  transition: background .15s, color .15s;
}
.algo-tag:hover {
  background: var(--accent);
  color: var(--bg);
  text-decoration: none;
}

/* ─── 画廊 ─── */

.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 6px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--dim);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all .15s;
}
.filter-btn:hover { border-color: var(--accent); color: var(--fg); }
.filter-btn.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.gallery-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color .15s, transform .15s, box-shadow .15s;
  display: flex;
  flex-direction: column;
}
.gallery-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}
.gallery-card.highlight {
  border-color: var(--accent2);
  box-shadow: 0 0 0 2px var(--accent2);
}

.gallery-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: linear-gradient(135deg, #1a2130, #243046);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--mono);
}

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

.gallery-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.gallery-body h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.gallery-body .desc {
  color: var(--dim);
  font-size: 0.85rem;
  flex: 1;
  margin-bottom: 12px;
}

.gallery-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
}

.gallery-meta .cat {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--code-bg);
  color: var(--dim);
}

.gallery-meta .qubits {
  color: var(--dim);
  font-family: var(--mono);
}

/* ─── 演示 Modal ─── */

.demo-modal {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 200;
  align-items: center;
  justify-content: center;
}
.demo-modal.open { display: flex; }

.demo-modal-inner {
  width: 90%;
  max-width: 1100px;
  height: 80vh;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg);
  position: relative;
}

.demo-modal-inner iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.demo-modal .close-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--fg);
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.demo-modal .close-btn:hover { background: var(--code-bg); }

/* ─── Playground 布局 ─── */

.playground-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0;
  height: calc(100vh - 56px);
  overflow: hidden;
}

.playground-editor {
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 20px;
  overflow-y: auto;
}

.playground-player {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.editor-section {
  margin-bottom: 24px;
}

.editor-section h4 {
  margin: 0 0 10px;
  font-size: 0.9rem;
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.qubit-control button {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--code-bg);
  color: var(--fg);
  font-size: 1.1rem;
  cursor: pointer;
}
.qubit-control button:hover { border-color: var(--accent); }
.qubit-control .num {
  font-size: 1.2rem;
  font-weight: 700;
  font-family: var(--mono);
  min-width: 20px;
  text-align: center;
}

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

.gate-btn {
  padding: 10px 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--code-bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .12s;
  text-align: center;
}
.gate-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.gate-btn.selected {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.preset-btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--dim);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all .12s;
}
.preset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.run-btn {
  width: 100%;
  padding: 12px;
  margin-bottom: 8px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--bg);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: box-shadow .15s;
}
.run-btn:hover { box-shadow: 0 4px 16px rgba(77, 197, 242, 0.35); }

.clear-btn {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--dim);
  font-size: 0.9rem;
  cursor: pointer;
}
.clear-btn:hover { border-color: var(--accent2); color: var(--accent2); }

/* Playground 中的播放器（复用 viewer 模板 DOM ID） */
.playground-player #viewport {
  flex: 1;
  position: relative;
  min-height: 420px;
  background: var(--bg);
}

.playground-player #circuitPanel {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 8px 16px;
  overflow-x: auto;
  max-height: 160px;
}
.playground-player #circuitPanel.hidden { display: none; }
.playground-player #circuitSvg { display: block; }
.playground-player #circuitSvg .wire { stroke: #3d4858; stroke-width: 2; fill: none; }
.playground-player #circuitSvg .qubit-label { fill: var(--dim); font-size: 13px; font-family: var(--mono); text-anchor: end; }
.playground-player #circuitSvg .gate-box { fill: #1a2130; stroke: var(--accent); stroke-width: 1.5; rx: 4; ry: 4; cursor: pointer; transition: stroke .12s, fill .12s; }
.playground-player #circuitSvg .gate-box:hover { fill: #243046; }
.playground-player #circuitSvg .gate-label { fill: var(--fg); font-size: 12px; font-family: var(--mono); text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.playground-player #circuitSvg .control-dot { fill: var(--accent); stroke: none; }
.playground-player #circuitSvg .control-line { stroke: var(--accent); stroke-width: 1.5; fill: none; }
.playground-player #circuitSvg .target-circle { fill: none; stroke: var(--accent); stroke-width: 1.5; }
.playground-player #circuitSvg .target-cross { stroke: var(--accent); stroke-width: 1.5; }
.playground-player #circuitSvg .swap-cross { stroke: var(--accent); stroke-width: 2; }
.playground-player #circuitSvg .gate-group.active .gate-box { fill: var(--accent2); stroke: var(--accent2); }
.playground-player #circuitSvg .gate-group.active .gate-label { fill: #1a2130; font-weight: 600; }
.playground-player #circuitSvg .gate-group.active .control-dot,
.playground-player #circuitSvg .gate-group.active .target-circle,
.playground-player #circuitSvg .gate-group.active .target-cross,
.playground-player #circuitSvg .gate-group.active .swap-cross,
.playground-player #circuitSvg .gate-group.active .control-line { stroke: var(--accent2); fill: var(--accent2); }
.playground-player #circuitSvg .gate-group.active .target-circle { fill: none; }

.playground-player #controls {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 10px 16px;
  background: var(--panel);
  border-top: 1px solid var(--border);
}
.playground-player #playBtn {
  width: 44px; height: 36px;
  border: 1px solid #2c3547;
  border-radius: 8px;
  background: #1a2130;
  color: var(--fg);
  font-size: 16px;
  cursor: pointer;
}
.playground-player #playBtn:hover { background: #232c40; }
.playground-player #speed {
  background: #1a2130;
  color: var(--fg);
  border: 1px solid #2c3547;
  border-radius: 8px;
  padding: 7px 8px;
}
.playground-player #scrub { flex: 1; accent-color: var(--accent); }
.playground-player #timeLabel {
  min-width: 110px;
  text-align: right;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
}

.playground-player #statePanel {
  display: flex;
  gap: 24px;
  padding: 12px 16px 16px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  max-height: 220px;
  overflow-y: auto;
}
.playground-player #statePanel h3 {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--dim);
  font-weight: 600;
}
.playground-player #probList { min-width: 320px; }
.playground-player .probRow {
  display: grid;
  grid-template-columns: 72px 1fr 190px;
  gap: 10px;
  align-items: center;
  padding: 2px 0;
  font-variant-numeric: tabular-nums;
}
.playground-player .probRow .label { color: var(--accent); font-family: var(--mono); }
.playground-player .probRow .barTrack { height: 12px; background: #1a2130; border-radius: 6px; overflow: hidden; }
.playground-player .probRow .bar { height: 100%; width: 0%; background: linear-gradient(90deg, #2b7fb8, #4dc5f2); border-radius: 6px; transition: width .05s linear; }
.playground-player .probRow .nums { color: var(--dim); font-size: 12.5px; }
.playground-player #blochList {
  font-family: var(--mono);
  color: var(--dim);
  font-size: 12.5px;
  white-space: pre;
}

/* ─── 文档页 ─── */

.docs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px 24px;
}

.docs-sidebar {
  position: sticky;
  top: 72px;
  align-self: start;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}

.docs-sidebar nav { font-size: 0.9rem; }
.docs-sidebar .group-title {
  color: var(--dim);
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.5px;
  margin: 16px 0 6px;
  padding-left: 12px;
}
.docs-sidebar a {
  display: block;
  padding: 5px 12px;
  color: var(--dim);
  border-radius: 6px;
  transition: background .12s, color .12s;
}
.docs-sidebar a:hover,
.docs-sidebar a.active {
  background: var(--code-bg);
  color: var(--fg);
  text-decoration: none;
}

.docs-content { min-width: 0; }
.docs-content h2 { border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.docs-content h3 { color: var(--accent); }

/* ─── 页脚 ─── */

.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
  color: var(--dim);
  font-size: 0.88rem;
}
.footer a { color: var(--dim); }
.footer a:hover { color: var(--accent); }

/* ─── 响应式 ─── */

@media (max-width: 900px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .playground-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    height: auto;
  }
  .playground-editor {
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 50vh;
  }
  .docs-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .docs-sidebar { position: static; max-height: none; }
}

@media (max-width: 600px) {
  h1 { font-size: 2rem; }
  .hero h1 { font-size: 2.2rem; }
  .hero .subtitle { font-size: 1rem; }
  .features-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .navbar .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
  }
  .navbar .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .gate-palette { grid-template-columns: repeat(3, 1fr); }
}