:root {
  --bg: #0f0a1a;
  --bg-card: #1a1228;
  --text: #e8e0f0;
  --text-muted: #a89bb8;
  --accent: #9b6dff;
  --accent-2: #c77dff;
  --border: rgba(155, 109, 255, 0.25);
  --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --radius: 12px;
  --max-width: 720px;
  --page-padding: 24px;
  --content-padding: 28px;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(118, 75, 162, 0.18), transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(102, 126, 234, 0.12), transparent 50%);
  padding-left: env(safe-area-inset-left, 0);
  padding-right: env(safe-area-inset-right, 0);
}

a {
  color: var(--accent-2);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px var(--page-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.logo:hover {
  text-decoration: none;
  color: var(--accent-2);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 0.9rem;
}

.site-nav a {
  color: var(--text-muted);
}

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

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--content-padding) 64px;
  width: 100%;
}

.hero {
  text-align: center;
  padding: 48px 0 40px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--accent-2);
  border: 1px solid var(--border);
  background: rgba(155, 109, 255, 0.08);
  margin-bottom: 20px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  margin: 0 auto;
  max-width: 520px;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.cta-row {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 48px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--accent-2);
}

.feature-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.content-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-top: 24px;
  padding-bottom: 48px;
}

.content-page > * {
  max-width: 100%;
}

.content-page h1 {
  margin: 0 0 8px;
  font-size: 1.75rem;
}

.content-page .updated {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 32px;
}

.content-page h2 {
  margin: 32px 0 12px;
  font-size: 1.15rem;
  color: var(--accent-2);
}

.content-page p,
.content-page li {
  color: var(--text-muted);
  line-height: 1.7;
}

.content-page ul {
  padding-left: 1.5rem;
  margin: 0 0 1rem;
}

.content-page li {
  margin-bottom: 8px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-top: 24px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

.form-group input:focus {
  outline: 2px solid rgba(155, 109, 255, 0.5);
  outline-offset: 1px;
}

.message {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.92rem;
}

.message.ok {
  background: rgba(76, 175, 80, 0.15);
  border: 1px solid rgba(76, 175, 80, 0.35);
  color: #a5d6a7;
}

.message.err {
  background: rgba(244, 67, 54, 0.12);
  border: 1px solid rgba(244, 67, 54, 0.35);
  color: #ef9a9a;
}

.site-footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px var(--page-padding) calc(48px + env(safe-area-inset-bottom, 0));
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.site-footer p {
  margin: 0 0 8px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: center;
  margin-top: 12px;
}

@media (max-width: 600px) {
  :root {
    --page-padding: 24px;
    --content-padding: 24px;
  }

  body {
    font-size: 17px;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
    padding-top: calc(env(safe-area-inset-top, 0px) + 16px);
    padding-bottom: 16px;
  }

  main {
    padding-left: var(--content-padding);
    padding-right: var(--content-padding);
  }

  .hero {
    padding: 32px 0 28px;
  }

  .feature-card,
  .card {
    padding: 20px;
  }

  .content-page h1 {
    font-size: 1.45rem;
    line-height: 1.25;
  }

  .content-page h2 {
    font-size: 1.1rem;
    margin-top: 28px;
  }

  .content-page ul {
    padding-left: 1.35rem;
  }
}