:root {
  color-scheme: dark;
  --bg-page: #121216;
  --bg-page-alt: #16171c;
  --bg-surface: #1b1d22;
  --bg-surface-elevated: #24262d;
  --bg-code: #15171c;
  --border-color: #2a2d35;
  --border-color-light: #3a3e49;
  --text-primary: #e6e6e8;
  --text-secondary: #a5a7b0;
  --text-muted: #777b86;
  --accent: #8b82f6;
  --accent-light: #aaa3ff;
  --accent-cyan: #75d5f2;
  --accent-emerald: #56c596;
  --accent-amber: #e7ad55;
  --accent-rose: #f2778c;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SFMono-Regular', Consolas, monospace;
  --radius: 10px;
  --radius-lg: 14px;
  --max-width: 1200px;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: #b7b1ff;
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(18, 18, 22, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text-primary);
}

.brand img {
  width: 28px;
  height: 28px;
}

.brand-tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.15rem 0.5rem;
  background-color: #22242a;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 1.5vw, 1.4rem);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  white-space: nowrap;
}

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

@media (max-width: 768px) {
  .nav-bar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.35rem 1rem;
    padding-top: 0.5rem;
    padding-bottom: 0.35rem;
  }

  .nav-bar nav {
    grid-column: 1 / -1;
    min-width: 0;
  }

  .nav-links {
    display: flex;
    gap: 1.25rem;
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: 0.2rem;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-bar > div {
    justify-self: end;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-primary {
  background-color: #6259cf;
  color: #ffffff;
  border-color: #756ce2;
}

.btn-primary:hover {
  background-color: #756ce2;
  border-color: #8b82f6;
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--bg-surface);
  border-color: var(--border-color-light);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-color-light);
  color: var(--text-primary);
}

/* Hero */
.hero {
  padding: 5rem 0 4.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-page-alt);
}

.hero-header {
  max-width: 870px;
  margin-bottom: 2.75rem;
}

.hero-kicker {
  margin-bottom: 1.1rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.045em;
  margin-bottom: 1.35rem;
  max-width: 800px;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1.75rem;
  max-width: 760px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--bg-surface);
}

.hero-meta strong {
  color: var(--text-secondary);
  font-weight: 500;
}

/* AI-Assisted Development Disclaimer Banner */
.ai-disclaimer-banner {
  margin: 0 0 3.25rem;
  background-color: #211d15;
  border: 1px solid #46391f;
  border-left: 3px solid #c9952e;
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.ai-banner-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.ai-banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: #e5bd68;
  font-weight: 700;
  font-size: 0.825rem;
  letter-spacing: 0.04em;
  font-family: var(--font-mono);
}

.ai-banner-badge svg {
  color: #d6a542;
  flex-shrink: 0;
}

.ai-banner-tag {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: #302819;
  border: 1px solid #514124;
  color: #dfbb6a;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.ai-banner-body {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.ai-banner-lead {
  font-size: 0.95rem;
  color: #dfd1ae;
  line-height: 1.5;
}

.ai-banner-lead strong {
  color: #f2e8cf;
}

.ai-banner-text {
  font-size: 0.875rem;
  color: #bdb49e;
  line-height: 1.55;
}

.ai-banner-text code {
  background: #302819;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  color: #e3c06f;
  border: 1px solid #514124;
}

.ai-banner-callout {
  font-size: 0.85rem;
  color: #aaa18d;
  margin-top: 0.25rem;
  padding-top: 0.65rem;
  border-top: 1px solid #40351f;
}

.ai-banner-callout a {
  color: #e4bd65;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
}

.ai-banner-callout a:hover {
  color: #f4d88f;
}

/* Code Preview Box */
.preview-card {
  margin-top: 0;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 18px 42px -28px rgba(0, 0, 0, 0.78);
}

.preview-tab-bar {
  display: flex;
  background-color: #17191e;
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
}

.preview-tab {
  padding: 0.75rem 1.15rem;
  font-family: var(--font-sans);
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.preview-tab:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.035);
}

.preview-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background-color: var(--bg-surface);
}

.tab-panel {
  display: none;
}

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

.preview-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 1rem;
  background-color: #0b101d;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  flex-wrap: wrap;
  gap: 0.5rem;
}

.bar-left, .bar-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.file-tag {
  color: #eef1f7;
  font-weight: 600;
}

.divider {
  color: #576174;
}

.host-selector {
  background-color: #151a25;
  color: #75d5f2;
  border: 1px solid #374154;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  cursor: pointer;
  outline: none;
}

.host-selector:focus {
  border-color: var(--accent);
}

.badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-weight: 500;
}

.badge-vault {
  background-color: rgba(245, 158, 11, 0.15);
  border: 1px solid var(--accent-amber);
  color: var(--accent-amber);
}

.badge-winner {
  background-color: #18352b;
  border: 1px solid #2c654e;
  color: #9be0bc;
}

.btn-micro {
  background-color: #171c26;
  border: 1px solid #384151;
  color: #c1c8d3;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-micro:hover {
  background-color: #222a39;
  color: #ffffff;
  border-color: #6e7a91;
}

.preview-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
}

.preview-code {
  min-width: 0;
  border-right-color: #242b39;
}

.preview-aside .badge-winner {
  color: #9be0bc;
  background-color: #18352b;
  border-color: #2c654e;
}

.preview-grid.split-equal {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

@media (max-width: 850px) {
  .preview-grid, .preview-grid.split-equal {
    grid-template-columns: 1fr;
  }
}

.preview-code {
  position: relative;
  padding: 1.25rem;
  background-color: var(--bg-code);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
  border-right: 1px solid var(--border-color);
}

.preview-rendered {
  background-color: #181b22;
}

.line {
  white-space: pre;
}

.vault-ciphertext,
#spec-port-line,
#spec-engine-line,
#spec-storage-line {
  white-space: normal;
}

.vault-ciphertext > div,
#spec-port-line > .twoslash-hover,
#spec-engine-line > .twoslash-hover,
#spec-storage-line > .twoslash-hover,
#spec-storage-line > div {
  white-space: pre;
}

.highlight-line {
  background-color: rgba(56, 189, 248, 0.08);
  border-left: 2px solid var(--accent-cyan);
  padding-left: 0.25rem;
  margin-left: -0.25rem;
}

.vault-gutter-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.gutter-lock {
  cursor: pointer;
  user-select: none;
  font-size: 0.9rem;
  filter: drop-shadow(0 0 2px rgba(245, 158, 11, 0.5));
  transition: transform 0.15s ease;
}

.gutter-lock:hover {
  transform: scale(1.2);
}

.vault-reveal-popup {
  position: absolute;
  top: 4.5rem;
  left: 2rem;
  right: 2rem;
  background-color: #20232a;
  border: 1px solid var(--accent-amber);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
  z-index: 20;
}

.popup-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--accent-amber);
  margin-bottom: 0.4rem;
  font-family: var(--font-sans);
}

.popup-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
}

.popup-close:hover {
  color: var(--text-primary);
}

.popup-body {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-page);
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.popup-footer {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
  font-family: var(--font-sans);
}

.lint-warning-banner {
  margin-top: 0.75rem;
  padding: 0.5rem 0.75rem;
  background-color: rgba(244, 63, 94, 0.12);
  border: 1px solid var(--accent-rose);
  border-radius: 4px;
  font-size: 0.775rem;
  color: #fda4af;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.warn-code {
  background-color: var(--accent-rose);
  color: #fff;
  font-weight: 700;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.7rem;
}

.diag-tooltip {
  margin-top: 0.75rem;
  padding: 0.6rem 0.85rem;
  background-color: rgba(245, 158, 11, 0.12);
  border: 1px solid var(--accent-amber);
  border-radius: 4px;
  font-size: 0.775rem;
  color: #fde68a;
}

.diag-tooltip-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.diag-tooltip-title .warn-code {
  background-color: var(--accent-amber);
  color: #000;
}

.spec-view-box {
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.75rem;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.spec-entry {
  color: var(--text-secondary);
}

.spec-entry code {
  color: var(--accent-cyan);
}

.spec-status-msg {
  margin-top: 0.75rem;
}

.nav-clickable {
  text-decoration: underline dotted var(--accent-light);
  cursor: pointer;
}

.nav-clickable:hover {
  color: #c7d2fe;
}

.nav-info-box {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  font-size: 0.825rem;
}

.nav-item {
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.6rem 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.nav-item strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.2rem;
}

.vault-feature-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.825rem;
}

.vault-item {
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.55rem 0.75rem;
  color: var(--text-secondary);
}

.vault-item strong {
  color: var(--text-primary);
}

.preview-aside {
  padding: 1.25rem;
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.aside-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
}

.precedence-table {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.825rem;
}

.prec-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
}

.prec-row.winner {
  border-color: #065f46;
  background-color: #064e3b22;
}

.prec-level {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-cyan);
  min-width: 1.5rem;
}

.prec-details {
  flex: 1;
}

.prec-source {
  color: var(--text-primary);
  font-weight: 500;
}

.prec-val {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  color: var(--text-muted);
}

/* Sections */
.section {
  padding: 5.5rem 0;
  border-bottom: 1px solid var(--border-color);
  scroll-margin-top: 5.5rem;
}

#features,
#vault,
#compatibility {
  background-color: var(--bg-page-alt);
}

.section-header {
  margin-bottom: 2.75rem;
}

.section-header::before {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

#features .section-header::before { content: "CAPABILITIES"; }
#precedence .section-header::before { content: "INVENTORY & VARIABLES"; }
#vault .section-header::before { content: "SECRET HANDLING"; }
#specs .section-header::before { content: "STATIC ANALYSIS"; }
#compatibility .section-header::before { content: "SUPPORTED IDEs"; }
#install .section-header::before { content: "FROM SOURCE"; }

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  margin-bottom: 0.65rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 720px;
  line-height: 1.7;
}

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
}

.feature-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.feature-item:hover {
  border-color: var(--border-color-light);
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -20px rgba(0, 0, 0, 0.75);
}

.feature-item h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.55;
  margin-bottom: 0.75rem;
}

.feature-item ul {
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.feature-item ul li::before {
  content: "•";
  color: var(--accent-light);
  margin-right: 0.5rem;
  font-weight: bold;
}

/* Deep Dive Two-Column */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 800px) {
  .split-section {
    grid-template-columns: 1fr;
  }
}

.doc-block {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.doc-block h4 {
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.doc-block p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

/* Diagnostic Codes */
.diag-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.diag-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.diag-code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.diag-card p {
  font-size: 0.825rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Compatibility */
.compat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.compat-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

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

.compat-name {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.compat-detail {
  font-size: 0.825rem;
  color: var(--text-muted);
}

/* Code Snippet Card */
.code-card {
  background-color: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 1rem;
  box-shadow: 0 18px 42px -28px rgba(0, 0, 0, 0.78);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background-color: #191e28;
  border-bottom: 1px solid #2e3543;
  font-size: 0.8rem;
  color: #aab3c1;
  font-family: var(--font-mono);
}

.code-copy-btn {
  background: none;
  border: 1px solid #475164;
  color: #c1c8d3;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all 0.15s ease;
}

.code-header .badge-twoslash {
  color: #75d5f2;
}

.code-copy-btn:hover {
  background-color: #293141;
  border-color: #65728a;
  color: #ffffff;
}

.code-body {
  padding: 1rem;
  overflow-x: auto;
  line-height: 1.6;
}

/* Shiki Syntax Highlighting & Token Grammar */
.shiki, .preview-code {
  color: #e2e8f0;
}
.syn-k { color: #7aa2f7; font-weight: 500; } /* Keyword */
.syn-p { color: #38bdf8; }                   /* Property / Key */
.syn-s { color: #9ece6a; }                   /* String */
.syn-n { color: #ff9e64; }                   /* Number / Boolean */
.syn-c { color: #565f89; font-style: italic; } /* Comment */
.syn-j { color: #c084fc; font-weight: 500; } /* Jinja expression */
.syn-f { color: #2ac3de; }                   /* Filter / Function */
.syn-o { color: #89ddff; }                   /* Operator / Delimiter */
.syn-t { color: #2dd4bf; }                   /* Type identifier */
.syn-tag { color: #f7768e; font-weight: 600; } /* Tag / Directive */

/* Twoslash Interactive Components */
.twoslash-hover {
  position: relative;
  border-bottom: 1px dashed rgba(129, 140, 248, 0.55);
  cursor: help;
  display: inline-block;
  transition: all 0.15s ease;
}

.twoslash-hover:hover,
.twoslash-hover:focus-visible {
  border-bottom-color: var(--accent-cyan);
  background-color: rgba(56, 189, 248, 0.12);
  border-radius: 2px;
}

/* Twoslash Floating Type Popover */
.twoslash-popup {
  --popup-arrow-left: 1.25rem;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 0;
  min-width: 260px;
  max-width: 420px;
  max-height: calc(100vh - 1rem);
  overflow-y: auto;
  background-color: #20232a;
  border: 1px solid #3a3e49;
  border-radius: 6px;
  padding: 0.65rem 0.85rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
  z-index: 120;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  text-align: left;
  line-height: 1.45;
  white-space: normal;
  color: #e6ebf4;
}

.twoslash-popup.is-floating {
  position: fixed;
  top: 0;
  bottom: auto;
  left: 0;
  z-index: 200;
  min-width: min(260px, calc(100vw - 1rem));
  max-width: min(420px, calc(100vw - 1rem));
}

.twoslash-hover:hover > .twoslash-popup,
.twoslash-hover:focus-within > .twoslash-popup,
.twoslash-popup.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.twoslash-popup::after {
  content: '';
  position: absolute;
  top: 100%;
  left: var(--popup-arrow-left, 1.25rem);
  border: 5px solid transparent;
  border-top-color: #3a3e49;
}

.twoslash-popup.opens-below::after {
  top: auto;
  bottom: 100%;
  border-top-color: transparent;
  border-bottom-color: #3a3e49;
}

.twoslash-popup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 0.35rem;
  margin-bottom: 0.4rem;
}

.twoslash-popup-type {
  color: #38bdf8;
  font-weight: 600;
  font-size: 0.75rem;
}

.twoslash-popup-tag {
  font-size: 0.65rem;
  background-color: rgba(99, 102, 241, 0.2);
  border: 1px solid rgba(99, 102, 241, 0.4);
  color: #a5b4fc;
  border-radius: 3px;
  padding: 0.1rem 0.35rem;
  font-family: var(--font-sans);
  font-weight: 500;
}

.twoslash-popup-source {
  font-size: 0.7rem;
  color: #94a3b8;
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.twoslash-popup-source strong {
  color: #e2e8f0;
}

.twoslash-popup-doc {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: #cbd5e1;
  line-height: 1.4;
}

.twoslash-popup-action {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  color: #64748b;
  margin-top: 0.45rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 0.35rem;
}

/* Twoslash Query Annotation (^?) */
.twoslash-query {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  background-color: rgba(56, 189, 248, 0.07);
  border-left: 2px solid var(--accent-cyan);
  padding: 0.25rem 0.65rem;
  margin: 0.3rem 0;
  border-radius: 0 4px 4px 0;
  user-select: none;
}

.twoslash-query-pin {
  color: var(--accent-cyan);
  font-weight: 700;
}

.twoslash-query-text {
  flex: 1 1 16rem;
  min-width: 0;
  color: #f1f5f9;
  font-weight: 500;
}

.twoslash-query-source {
  margin-left: auto;
  color: #94a3b8;
  font-size: 0.725rem;
}

/* Twoslash Diagnostic Underline & Callout */
.twoslash-error {
  text-decoration: underline wavy var(--accent-rose);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  cursor: help;
}

.twoslash-error-callout {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  background-color: rgba(244, 63, 94, 0.12);
  border-left: 2px solid var(--accent-rose);
  padding: 0.4rem 0.75rem;
  font-size: 0.75rem;
  color: #fda4af;
  margin: 0.35rem 0;
  border-radius: 0 4px 4px 0;
}

.twoslash-error-badge {
  background-color: var(--accent-rose);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.65rem;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  white-space: nowrap;
}

/* Twoslash Badge in Header Bar */
.badge-twoslash {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--accent-cyan);
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

/* Footer */
.site-footer {
  padding: 3.5rem 0 2rem;
  background-color: #101115;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  max-width: 380px;
}

.footer-brand p {
  margin-top: 0.5rem;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

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

.footer-disclaimer {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.775rem;
  line-height: 1.5;
  color: var(--text-muted);
}

:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 3px;
}

@media (max-width: 768px) {
  .container {
    padding-right: 1.15rem;
    padding-left: 1.15rem;
  }

  .hero {
    padding: 3.75rem 0 3rem;
  }

  .hero-header {
    margin-bottom: 2rem;
  }

  .hero-meta {
    gap: 0.45rem;
  }

  .hero-meta span {
    font-size: 0.75rem;
  }

  .ai-disclaimer-banner {
    margin-bottom: 2.25rem;
    padding: 1rem;
  }

  .preview-tab-bar {
    scroll-snap-type: x proximity;
  }

  .preview-tab {
    scroll-snap-align: start;
    padding: 0.7rem 0.9rem;
  }

  .preview-code {
    padding: 1rem;
    font-size: 0.78rem;
    border-right: 0;
    border-bottom: 1px solid #242b39;
  }

  .preview-aside {
    padding: 1rem;
  }

  .section {
    padding: 4rem 0;
  }

  .section-header {
    margin-bottom: 2rem;
  }

  .features-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  }
}

@media (max-width: 480px) {
  .brand-tag {
    display: none;
  }

  .brand {
    gap: 0.55rem;
    font-size: 1.05rem;
  }

  .hero-title {
    font-size: clamp(2.15rem, 11vw, 3rem);
  }

  .hero-description {
    font-size: 1rem;
  }

  .hero-actions .btn {
    flex: 1;
    justify-content: center;
  }

  .ai-banner-header {
    align-items: flex-start;
  }

  .ai-banner-badge {
    font-size: 0.7rem;
  }

  .ai-banner-tag {
    display: none;
  }

  .bar-left,
  .bar-right {
    flex-wrap: wrap;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 1rem;
  }
}