:root {
  --bg: #07080f;
  --bg-card: rgba(255, 255, 255, 0.06);
  --bg-card-hover: rgba(255, 255, 255, 0.09);
  --border: rgba(255, 255, 255, 0.1);
  --text: #f4f6fb;
  --text-muted: #9aa3b8;
  --purple: #8c5cf5;
  --teal: #4fd1c5;
  --pink: #d3408c;
  --blue: #4da3fb;
  --radius: 16px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --nav-width: 280px;
  --font: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(140, 92, 245, 0.35), transparent),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(79, 209, 197, 0.2), transparent),
    radial-gradient(ellipse 50% 30% at 50% 100%, rgba(211, 64, 140, 0.15), transparent);
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--teal);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.layout {
  display: grid;
  grid-template-columns: var(--nav-width) 1fr;
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 28px 20px;
  border-right: 1px solid var(--border);
  background: rgba(7, 8, 15, 0.85);
  backdrop-filter: blur(20px);
  overflow-y: auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--purple), var(--teal));
  display: grid;
  place-items: center;
  font-size: 22px;
}

.logo h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.logo p {
  margin: 2px 0 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.nav-group {
  margin-bottom: 24px;
}

.nav-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--teal);
  margin: 0 0 10px 8px;
}

.nav a {
  display: block;
  padding: 9px 12px;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 0.92rem;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.nav a:hover,
.nav a.active {
  background: var(--bg-card);
  color: var(--text);
  text-decoration: none;
}

.main {
  padding: 40px 48px 80px;
  max-width: 920px;
}

.hero {
  margin-bottom: 48px;
}

.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--purple);
  margin-bottom: 12px;
}

.hero h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 16px;
  font-weight: 700;
}

.hero p.lead {
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 0 28px;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.badge.purple { color: var(--purple); border-color: rgba(140, 92, 245, 0.35); }
.badge.teal { color: var(--teal); border-color: rgba(79, 209, 197, 0.35); }
.badge.pink { color: var(--pink); border-color: rgba(211, 64, 140, 0.35); }

section {
  margin-bottom: 56px;
  scroll-margin-top: 24px;
}

section h3 {
  font-size: 1.55rem;
  margin: 0 0 8px;
}

.section-desc {
  color: var(--text-muted);
  margin: 0 0 24px;
  max-width: 680px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  backdrop-filter: blur(12px);
}

.card h4 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}

.card p:last-child {
  margin-bottom: 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}

.mode-card {
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
}

.mode-card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--purple);
}

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 20px 48px;
  margin-bottom: 4px;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--purple), var(--teal));
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 700;
}

.tip {
  border-left: 3px solid var(--teal);
  padding: 12px 16px;
  background: rgba(79, 209, 197, 0.08);
  border-radius: 0 12px 12px 0;
  margin: 16px 0;
  font-size: 0.95rem;
}

.warn {
  border-left: 3px solid var(--pink);
  padding: 12px 16px;
  background: rgba(211, 64, 140, 0.08);
  border-radius: 0 12px 12px 0;
  margin: 16px 0;
}

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

th, td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--teal);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* UI mockups */
.mockup-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-start;
  margin: 24px 0;
}

.phone {
  width: 220px;
  border-radius: 28px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  background: #0d0f18;
  padding: 12px;
  box-shadow: var(--shadow);
}

.phone-notch {
  width: 60px;
  height: 6px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 99px;
  margin: 0 auto 12px;
}

.phone-screen {
  border-radius: 18px;
  background: linear-gradient(180deg, #12151f, #0a0c14);
  min-height: 360px;
  padding: 14px;
  font-size: 0.72rem;
}

.mock-chrome {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  color: var(--teal);
  font-weight: 700;
  letter-spacing: 0.1em;
  font-size: 0.65rem;
}

.mock-dock {
  display: flex;
  gap: 6px;
  margin-top: auto;
  padding-top: 16px;
}

.mock-dock span {
  flex: 1;
  text-align: center;
  padding: 8px 4px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  font-size: 0.62rem;
}

.mock-dock span.on {
  background: rgba(140, 92, 245, 0.35);
  color: #fff;
}

.mock-list-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  margin-bottom: 6px;
}

.mock-avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  flex-shrink: 0;
}

.mock-heart {
  margin-left: auto;
  color: var(--pink);
}

.mock-section-title {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--pink);
  margin: 10px 0 6px;
}

code, .mono {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.88em;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 7px;
  border-radius: 6px;
}

.footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.menu-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 100;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  backdrop-filter: blur(12px);
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .menu-toggle {
    display: block;
  }

  .sidebar {
    position: fixed;
    left: -100%;
    width: min(var(--nav-width), 88vw);
    z-index: 90;
    transition: left 0.25s ease;
  }

  .sidebar.open {
    left: 0;
  }

  .main {
    padding: 72px 20px 60px;
  }
}