:root {
  --bg: #f7f9ff;
  --panel: #ffffff;
  --panel-2: #eef2ff;
  --text: #121827;
  --muted: #4a5570;
  --primary: #2d5bff;
  --primary-strong: #1f49dc;
  --border: #cfd8ef;
  --focus: #8c3b00;
  --link: #274fdf;
  --link-hover: #1c3aa8;
  --header-bg: rgba(247, 249, 255, 0.92);
  --section-alt-start: rgba(214, 225, 255, 0.6);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d12;
    --panel: #121723;
    --panel-2: #181f2e;
    --text: #f5f7ff;
    --muted: #b9c0d4;
    --primary: #7c9cff;
    --primary-strong: #5f83ff;
    --border: #2a3349;
    --focus: #ffd76a;
    --link: #a9beff;
    --link-hover: #c2d1ff;
    --header-bg: rgba(11, 13, 18, 0.92);
    --section-alt-start: rgba(24, 31, 46, 0.5);
  }
}

html[data-theme="light"] {
  --bg: #f7f9ff;
  --panel: #ffffff;
  --panel-2: #eef2ff;
  --text: #121827;
  --muted: #4a5570;
  --primary: #2d5bff;
  --primary-strong: #1f49dc;
  --border: #cfd8ef;
  --focus: #8c3b00;
  --link: #274fdf;
  --link-hover: #1c3aa8;
  --header-bg: rgba(247, 249, 255, 0.92);
  --section-alt-start: rgba(214, 225, 255, 0.6);
}

html[data-theme="dark"] {
  --bg: #0b0d12;
  --panel: #121723;
  --panel-2: #181f2e;
  --text: #f5f7ff;
  --muted: #b9c0d4;
  --primary: #7c9cff;
  --primary-strong: #5f83ff;
  --border: #2a3349;
  --focus: #ffd76a;
  --link: #a9beff;
  --link-hover: #c2d1ff;
  --header-bg: rgba(11, 13, 18, 0.92);
  --section-alt-start: rgba(24, 31, 46, 0.5);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--link);
}

a:hover {
  color: var(--link-hover);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: #ffffff;
  color: #111;
  padding: 0.5rem 0.75rem;
  border-radius: 0.4rem;
  text-decoration: none;
  z-index: 1000;
}

.skip-link:focus {
  top: 0.75rem;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
}

.logo {
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.nav-list a {
  text-decoration: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 0.65rem;
  padding: 0.72rem 1rem;
  font-weight: 700;
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--primary-strong);
  color: #ffffff;
}

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

.btn-secondary:hover {
  background: var(--panel);
}

.hero {
  padding: 4rem 0 3rem;
}

.hero-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1.35fr 1fr;
  align-items: start;
}

.eyebrow {
  color: #d4ddff;
  font-weight: 700;
  margin: 0 0 0.25rem;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin-top: 0;
}

h1 {
  font-size: clamp(1.8rem, 3.6vw, 2.9rem);
  margin-bottom: 0.85rem;
}

h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin-bottom: 1rem;
}

.lead {
  color: var(--muted);
  max-width: 65ch;
}

.muted {
  color: var(--muted);
}

.hero-card,
.card,
.cta-block,
details {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.9rem;
}

.hero-card {
  padding: 1rem 1.1rem;
}

.hero-card ul {
  margin: 0;
  padding-left: 1.2rem;
}

.cta-row {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin: 1.15rem 0 0.35rem;
}

.section {
  padding: 3rem 0;
}

.section-alt {
  background: linear-gradient(180deg, var(--section-alt-start), rgba(0, 0, 0, 0));
}

.steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding-left: 1.25rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  padding: 1rem;
}

.example-links {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.45rem;
}

.faq-list {
  display: grid;
  gap: 0.75rem;
}

details {
  padding: 0.8rem 0.9rem;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

.cta-block {
  padding: 1.4rem;
  background: var(--panel-2);
}

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

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.theme-control {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.theme-label {
  font-size: 0.95rem;
  color: var(--muted);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  background: var(--panel);
  color: var(--text);
  padding: 0.28rem 0.52rem 0.28rem 0.35rem;
  cursor: pointer;
}

.theme-toggle-track {
  position: relative;
  width: 2.25rem;
  height: 1.35rem;
  border-radius: 999px;
  background: var(--panel-2);
  border: 1px solid var(--border);
}

.theme-toggle-thumb {
  position: absolute;
  top: 50%;
  left: 0.12rem;
  transform: translateY(-50%);
  width: 1rem;
  height: 1rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  background: var(--panel);
  border: 1px solid var(--border);
  transition: left 0.2s ease;
}

html[data-theme="dark"] .theme-toggle-thumb {
  left: 1.05rem;
}

.theme-toggle-text {
  font-size: 0.9rem;
  color: var(--muted);
}

@media (max-width: 960px) {
  .hero-grid,
  .cards,
  .steps {
    grid-template-columns: 1fr;
  }

  .nav-list {
    display: none;
  }

  .header-inner {
    flex-wrap: wrap;
  }
}