:root {
  --bg: #0a0a0f;
  --bg-alt: #12121a;
  --bg-card: #16161f;
  --border: #26262f;
  --text: #f4f4f6;
  --text-dim: #9a9aa5;
  --accent: #6366f1;
  --accent-2: #a855f7;
  --accent-gradient: linear-gradient(135deg, var(--accent), var(--accent-2));
  --radius: 12px;
  --max-width: 1180px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ── Navigation ──────────────────────────────────────────────────────── */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
}

.brand img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.92rem;
}

.nav-links a {
  color: var(--text-dim);
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  background: var(--accent-gradient);
  color: #fff !important;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
}

/* ── Hero ────────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  padding: 96px 0 72px;
  overflow: hidden;
  text-align: center;
}

.hero::before {
  content: "";
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.25), transparent 65%);
  pointer-events: none;
}

.badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent-2);
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.35);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  max-width: 820px;
  margin: 0 auto 20px;
}

.hero h1 .gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lead {
  color: var(--text-dim);
  font-size: 1.15rem;
  max-width: 620px;
  margin: 0 auto 36px;
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  transition: transform 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  border: none;
}

.btn-primary:hover {
  opacity: 0.92;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--accent);
}

/* ── Terminal mockup ─────────────────────────────────────────────────── */

.terminal {
  max-width: 640px;
  margin: 0 auto;
  background: #0d0d13;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-align: left;
  box-shadow: 0 30px 60px -20px rgba(99, 102, 241, 0.25);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #15151d;
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal-body {
  padding: 20px 22px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.88rem;
}

.terminal-body .line {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.terminal-body .line:last-child {
  margin-bottom: 0;
}

.terminal-body .prompt {
  color: var(--accent-2);
  user-select: none;
}

.terminal-body .comment {
  color: var(--text-dim);
}

/* ── Stats strip ─────────────────────────────────────────────────────── */

.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}

.stats .container {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  padding: 40px 24px;
  text-align: center;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  color: var(--text-dim);
  font-size: 0.82rem;
  margin-top: 4px;
}

/* ── Section shared ──────────────────────────────────────────────────── */

section {
  padding: 88px 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-head .badge {
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-dim);
  font-size: 1.02rem;
}

/* ── Feature grid ────────────────────────────────────────────────────── */

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.feature-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--accent-gradient);
  margin-bottom: 18px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  color: #fff;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-dim);
  font-size: 0.92rem;
}

/* ── Comparison table ────────────────────────────────────────────────── */

.compare-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

table.compare {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

table.compare th,
table.compare td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table.compare th {
  background: var(--bg-alt);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

table.compare tr:last-child td {
  border-bottom: none;
}

table.compare td.dim {
  font-weight: 600;
}

table.compare td.win {
  color: #4ade80;
}

td.win::before {
  content: "✓ ";
}

/* ── Architecture diagram ────────────────────────────────────────────── */

.arch-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}

.arch-row {
  display: grid;
  gap: 14px;
  margin-bottom: 14px;
}

.arch-row.cols-1 { grid-template-columns: 1fr; }
.arch-row.cols-3 { grid-template-columns: repeat(3, 1fr); }
.arch-row.cols-4 { grid-template-columns: repeat(4, 1fr); }

.arch-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
  background: var(--bg-alt);
}

.arch-box.accent {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.08);
}

.arch-box .arch-title {
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 4px;
}

.arch-box .arch-sub {
  color: var(--text-dim);
  font-size: 0.78rem;
}

.arch-arrow {
  text-align: center;
  color: var(--text-dim);
  font-size: 1.1rem;
  margin: 4px 0;
}

/* ── Quickstart code block ───────────────────────────────────────────── */

.code-block {
  position: relative;
  background: #0d0d13;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 22px 24px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.88rem;
  overflow-x: auto;
}

.code-block pre {
  margin: 0;
  white-space: pre;
}

.code-block .comment {
  color: var(--text-dim);
}

.copy-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.78rem;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
}

.copy-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

/* ── How it works (numbered flow) ───────────────────────────────────── */

.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}

.flow-step {
  position: relative;
  text-align: center;
  padding: 0 14px;
}

.flow-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 26px;
  left: calc(50% + 40px);
  right: calc(-50% + 40px);
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.flow-num {
  width: 52px;
  height: 52px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent-gradient);
  font-weight: 800;
  font-size: 1.1rem;
  position: relative;
  z-index: 1;
}

.flow-step h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.flow-step p {
  color: var(--text-dim);
  font-size: 0.82rem;
}

/* ── Code example tabs ───────────────────────────────────────────────── */

.code-tabs {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-tab-bar {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
  overflow-x: auto;
}

.code-tab-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  padding: 14px 20px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.code-tab-btn:hover {
  color: var(--text);
}

.code-tab-btn.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.code-tab-panel {
  display: none;
  padding: 22px 24px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.86rem;
  overflow-x: auto;
}

.code-tab-panel.active {
  display: block;
}

.code-tab-panel pre {
  margin: 0;
  white-space: pre;
}

.code-tab-panel .comment { color: var(--text-dim); }
.code-tab-panel .str { color: #4ade80; }
.code-tab-panel .key { color: #818cf8; }

/* ── Package cards ───────────────────────────────────────────────────── */

.packages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.package-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.package-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.package-card h3 {
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 10px;
  word-break: break-word;
}

.package-card .pypi-badge {
  display: block;
  margin-bottom: 14px;
  height: 20px;
}

.package-card p {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-bottom: 16px;
  min-height: 40px;
}

.package-card .install {
  display: block;
  background: #0d0d13;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.78rem;
  color: var(--text);
  margin-bottom: 14px;
  overflow-x: auto;
  white-space: nowrap;
}

.package-card a.pypi-link {
  color: var(--accent-2);
  font-size: 0.85rem;
  font-weight: 600;
}

.package-card a.pypi-link:hover {
  text-decoration: underline;
}

/* ── Chart panel ─────────────────────────────────────────────────────── */

.chart-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.chart-panel canvas {
  max-height: 360px;
}

.charts-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 20px;
  align-items: stretch;
}

/* ── API teaser ──────────────────────────────────────────────────────── */

.api-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.api-endpoint-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.api-endpoint {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.85rem;
}

.api-endpoint .method {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-weight: 700;
  font-size: 0.74rem;
  padding: 3px 8px;
  border-radius: 4px;
}

.api-endpoint .method.get { background: rgba(74, 222, 128, 0.15); color: #4ade80; }
.api-endpoint .method.post { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
.api-endpoint .method.patch { background: rgba(251, 191, 36, 0.15); color: #fbbf24; }
.api-endpoint .method.delete { background: rgba(248, 113, 113, 0.15); color: #f87171; }
.api-endpoint .method.ws { background: rgba(168, 85, 247, 0.15); color: #a855f7; }

.api-endpoint .path {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color: var(--text);
}

.api-endpoint .desc {
  color: var(--text-dim);
  margin-left: auto;
  text-align: right;
}

/* ── Desktop app downloads ───────────────────────────────────────────── */

.downloads-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.download-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.download-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--accent-gradient);
  margin: 0 auto 16px;
}

.download-icon svg {
  width: 28px;
  height: 28px;
  color: #fff;
}

.download-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.download-card p {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-bottom: 18px;
}

.download-card .download-btn {
  width: 100%;
  justify-content: center;
}

.download-card .alt-download-link {
  display: block;
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.download-card .alt-download-link:hover {
  color: var(--accent-2);
  text-decoration: underline;
}

.desktop-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.desktop-feature {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.desktop-feature-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 9px;
  background: var(--accent-gradient);
}

.desktop-feature-icon svg {
  width: 18px;
  height: 18px;
  color: #fff;
}

.desktop-feature strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.desktop-feature span {
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* ── Footer ──────────────────────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

footer .foot-links {
  display: flex;
  gap: 24px;
  font-size: 0.88rem;
  color: var(--text-dim);
}

footer .foot-links a:hover {
  color: var(--text);
}

footer .copyright {
  color: var(--text-dim);
  font-size: 0.85rem;
}

footer .copyright a.credit-link {
  color: var(--accent-2);
  font-weight: 600;
}

footer .copyright a.credit-link:hover {
  text-decoration: underline;
}

/* ── Reveal-on-scroll ────────────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ──────────────────────────────────────────────────────── */

@media (max-width: 860px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .arch-row.cols-3,
  .arch-row.cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats .container {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 14px;
  }
  .flow-step:not(:last-child)::after {
    display: none;
  }
  .packages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .charts-row {
    grid-template-columns: 1fr;
  }
  .api-grid {
    grid-template-columns: 1fr;
  }
  .downloads-grid {
    grid-template-columns: 1fr;
  }
  .desktop-features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
    gap: 16px;
    display: none;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-toggle {
    display: block;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .arch-row.cols-3,
  .arch-row.cols-4 {
    grid-template-columns: 1fr;
  }
  .stats .container {
    grid-template-columns: repeat(2, 1fr);
  }
  table.compare {
    font-size: 0.8rem;
  }
  table.compare th,
  table.compare td {
    padding: 10px 12px;
  }
  .flow {
    grid-template-columns: 1fr;
  }
  .packages-grid {
    grid-template-columns: 1fr;
  }
  .api-endpoint {
    flex-wrap: wrap;
  }
  .api-endpoint .desc {
    margin-left: 0;
    text-align: left;
  }
}