:root {
  color-scheme: light dark;
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Light defaults + dark fallback variables */
  --bg-page-light: #f8fafd;
  --bg-page-dark: #0b1120;
  --bg-alt-light: #eef3fb;
  --bg-alt-dark: #11192e;
  --bg-card-light: #ffffff;
  --bg-card-dark: #162038;
  --text-main-light: #111827;
  --text-main-dark: #f1f5f9;
  --text-muted-light: #475569;
  --text-muted-dark: #94a3b8;
  --border-light: #dbe3f0;
  --border-dark: #253354;
  --brand-light: #1a56db;
  --brand-dark: #60a5fa;
  --brand-contrast-light: #ffffff;
  --brand-contrast-dark: #081226;
  --accent-bg-light: #e8f0fe;
  --accent-bg-dark: #1e2d4d;
  --ok-text-light: #0f6b3d;
  --ok-text-dark: #4ade80;
  --ok-bg-light: #e6f6ec;
  --ok-bg-dark: #113322;
  --warn-text-light: #7c4a03;
  --warn-text-dark: #fbbf24;
  --warn-bg-light: #fef7e0;
  --warn-bg-dark: #2c2008;

  --bg-page: var(--bg-page-light);
  --bg-alt: var(--bg-alt-light);
  --bg-card: var(--bg-card-light);
  --text-main: var(--text-main-light);
  --text-muted: var(--text-muted-light);
  --border-color: var(--border-light);
  --brand: var(--brand-light);
  --brand-contrast: var(--brand-contrast-light);
  --accent-bg: var(--accent-bg-light);
  --ok-text: var(--ok-text-light);
  --ok-bg: var(--ok-bg-light);
  --warn-text: var(--warn-text-light);
  --warn-bg: var(--warn-bg-light);
  --code-bg: #0f172a;
  --code-fg: #e2e8f0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: var(--bg-page-dark);
    --bg-alt: var(--bg-alt-dark);
    --bg-card: var(--bg-card-dark);
    --text-main: var(--text-main-dark);
    --text-muted: var(--text-muted-dark);
    --border-color: var(--border-dark);
    --brand: var(--brand-dark);
    --brand-contrast: var(--brand-contrast-dark);
    --accent-bg: var(--accent-bg-dark);
    --ok-text: var(--ok-text-dark);
    --ok-bg: var(--ok-bg-dark);
    --warn-text: var(--warn-text-dark);
    --warn-bg: var(--warn-bg-dark);
  }
}

@supports (color: light-dark(white, black)) {
  :root {
    --bg-page: light-dark(var(--bg-page-light), var(--bg-page-dark));
    --bg-alt: light-dark(var(--bg-alt-light), var(--bg-alt-dark));
    --bg-card: light-dark(var(--bg-card-light), var(--bg-card-dark));
    --text-main: light-dark(var(--text-main-light), var(--text-main-dark));
    --text-muted: light-dark(var(--text-muted-light), var(--text-muted-dark));
    --border-color: light-dark(var(--border-light), var(--border-dark));
    --brand: light-dark(var(--brand-light), var(--brand-dark));
    --brand-contrast: light-dark(var(--brand-contrast-light), var(--brand-contrast-dark));
    --accent-bg: light-dark(var(--accent-bg-light), var(--accent-bg-dark));
    --ok-text: light-dark(var(--ok-text-light), var(--ok-text-dark));
    --ok-bg: light-dark(var(--ok-bg-light), var(--ok-bg-dark));
    --warn-text: light-dark(var(--warn-text-light), var(--warn-text-dark));
    --warn-bg: light-dark(var(--warn-bg-light), var(--warn-bg-dark));
    accent-color: light-dark(#1a56db, #60a5fa);
    scrollbar-color: light-dark(#94a3b8, #475569) light-dark(#e2e8f0, #0f172a);
  }
}

:root[data-theme="light"] {
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  background-color: var(--bg-page);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brand);
  color: var(--brand-contrast);
  padding: 0.6rem 1rem;
  z-index: 100;
  border-radius: 0.375rem;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  width: min(1120px, 100% - 2rem);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
  flex-wrap: wrap;
  padding-block: 0.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-mark {
  color: var(--brand);
  display: inline-flex;
}

.brand-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background-color: var(--accent-bg);
  color: var(--brand);
}

.primary-nav {
  display: flex;
  gap: 1.15rem;
  flex-wrap: wrap;
}

.primary-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: var(--brand);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.15rem;
  border-radius: 0.5rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, opacity 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  opacity: 0.92;
}

.btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--brand);
  color: var(--brand-contrast);
}

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

.btn-ghost {
  background-color: transparent;
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-sm {
  font-size: 0.85rem;
  padding: 0.42rem 0.8rem;
}

.btn-xs {
  font-size: 0.78rem;
  padding: 0.28rem 0.6rem;
}

/* Hero */
.hero {
  padding-block: 4rem 3rem;
}

.urgency-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.38rem 0.85rem;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 600;
  background-color: var(--warn-bg);
  color: var(--warn-text);
  border: 1px solid color-mix(in srgb, var(--warn-text) 25%, transparent);
  margin-bottom: 1.25rem;
}

.dot-live {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background-color: var(--warn-text);
  flex-shrink: 0;
}

.hero-title {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4.2vw, 3.1rem);
  line-height: 1.14;
  letter-spacing: -0.025em;
  max-width: 19ch;
}

.hero-subtitle {
  margin: 0 0 1.75rem;
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 64ch;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2.5rem;
}

.kpi-strip {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.9rem;
}

.kpi-strip li {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.65rem;
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.kpi-strip strong {
  color: var(--brand);
  font-size: 1.05rem;
}

.kpi-strip span {
  font-size: 0.86rem;
  color: var(--text-muted);
}

/* Sections & Cards */
.section {
  padding-block: 3.5rem;
}

.section-alt {
  background-color: var(--bg-alt);
}

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

.section-head h2 {
  margin: 0 0 0.45rem;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  letter-spacing: -0.015em;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  max-width: 64ch;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
}

.split-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.25rem;
  align-items: stretch;
}

.code-card {
  display: flex;
  flex-direction: column;
}

.card-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.85rem;
}

.toolbar-title {
  font-weight: 700;
  font-size: 0.95rem;
}

.tab-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.tab-btn {
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: 0.4rem;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
}

.tab-btn.is-active {
  background-color: var(--accent-bg);
  color: var(--brand);
  border-color: var(--brand);
}

pre {
  margin: 0;
  padding: 1rem;
  border-radius: 0.55rem;
  background-color: var(--code-bg);
  color: var(--code-fg);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.55;
  overflow-x: auto;
  flex: 1;
}

.card-foot {
  margin: 0.85rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Trust card */
.trust-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
}

.trust-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.trust-url {
  margin: 0 0 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--brand);
}

.trust-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.status-pill {
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  background-color: var(--ok-bg);
  color: var(--ok-text);
  white-space: nowrap;
}

.trust-metrics {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.trust-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.75rem;
  border-radius: 0.5rem;
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  font-size: 0.88rem;
}

.badge-ok {
  color: var(--ok-text);
  font-size: 0.84rem;
}

.trust-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* Modules */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
}

.module-tag {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--brand);
  background-color: var(--accent-bg);
  padding: 0.18rem 0.5rem;
  border-radius: 0.35rem;
  margin-bottom: 0.6rem;
}

.module-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
}

.module-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Responsive table (per modern-web-guidance) */
.table-wrapper {
  container-type: inline-size;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  background-color: var(--bg-card);
}

.table-wrapper:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

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

.compare-table th,
.compare-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}

.compare-table thead th {
  background-color: var(--bg-alt);
  font-weight: 700;
}

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

.compare-table .col-highlight {
  background-color: var(--accent-bg);
  color: var(--brand);
  font-weight: 700;
}

@container (width < 600px) {
  .compare-table thead {
    display: none;
  }

  .compare-table,
  .compare-table tbody,
  .compare-table tr,
  .compare-table th,
  .compare-table td {
    display: block;
    width: 100%;
  }

  .compare-table tr {
    padding: 0.75rem 0.9rem;
    border-bottom: 2px solid var(--border-color);
  }

  .compare-table th,
  .compare-table td {
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--border-color);
  }

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

  .compare-table td::before {
    font-weight: 700;
    color: var(--text-muted);
  }

  .compare-table td:nth-child(2)::before { content: var(--label-2) ": "; }
  .compare-table td:nth-child(3)::before { content: var(--label-3) ": "; }
  .compare-table td:nth-child(4)::before { content: var(--label-4) ": "; }
  .compare-table td:nth-child(5)::before { content: var(--label-5) ": "; }
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

.price-card {
  position: relative;
  display: flex;
  flex-direction: column;
}

.price-card.is-featured {
  border: 2px solid var(--brand);
}

.popular-tag {
  align-self: flex-start;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--brand-contrast);
  background-color: var(--brand);
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  margin-bottom: 0.5rem;
}

.price-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.12rem;
}

.price {
  margin: 0 0 0.5rem;
  font-size: 1.8rem;
  font-weight: 800;
}

.price span {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-desc {
  margin: 0 0 0.9rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.price-card ul {
  margin: 0 0 1.25rem;
  padding-left: 1.15rem;
  font-size: 0.88rem;
  flex: 1;
}

.price-card li + li {
  margin-top: 0.35rem;
}

/* Accordion (per modern-web-guidance) */
.faq-container {
  max-width: 780px;
}

.accordion details {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.65rem;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.accordion summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.15rem;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.accordion summary::-webkit-details-marker {
  display: none;
}

.accordion summary::before {
  content: "";
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  background-color: var(--brand);
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  mask-size: contain;
  mask-repeat: no-repeat;
  transform: rotate(-90deg);
  transition: transform 0.2s ease;
}

.accordion details[open] summary::before {
  transform: rotate(0deg);
}

.faq-body {
  padding: 0 1.15rem 1rem 2.9rem;
  color: var(--text-muted);
  font-size: 0.94rem;
}

.faq-body p {
  margin: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .accordion details {
    interpolate-size: allow-keywords;
  }

  .accordion details::details-content {
    height: 0;
    overflow: hidden;
    contain: layout;
    transition: height 0.25s ease, content-visibility 0.25s ease allow-discrete;
  }

  .accordion details[open]::details-content {
    height: auto;
  }
}

/* Dialog */
.audit-dialog {
  width: min(560px, 100% - 2rem);
  border: 1px solid var(--border-color);
  border-radius: 0.85rem;
  background-color: var(--bg-card);
  color: var(--text-main);
  padding: 0;
}

.audit-dialog::backdrop {
  background: rgba(15, 23, 42, 0.6);
}

.dialog-header,
.dialog-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.dialog-footer {
  border-bottom: none;
  border-top: 1px solid var(--border-color);
  justify-content: flex-end;
}

.dialog-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

.dialog-body {
  padding: 1.15rem 1.25rem;
}

.mono-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--brand);
  margin: 0 0 0.85rem;
}

.dialog-list {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.92rem;
}

.dialog-list li + li {
  margin-top: 0.45rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding-block: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}