:root {
  --bg: #0b141a;
  --bg-card: #111b21;
  --bg-elevated: #1f2c34;
  --accent: #25d366;
  --accent-dim: #1da851;
  --text: #e9edef;
  --text-muted: #8696a0;
  --border: #2a3942;
  --danger: #f15c6d;
  --radius: 16px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.site-header {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #128c7e);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  color: #fff;
}

.hero {
  padding: 48px 0 64px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

@media (max-width: 800px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 32px 0 48px;
  }
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin-bottom: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  border: none;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #052e16;
}

.btn-primary:hover {
  background: var(--accent-dim);
  transform: translateY(-1px);
  text-decoration: none;
  color: #052e16;
}

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

.btn-ghost:hover {
  background: var(--bg-elevated);
  text-decoration: none;
  color: var(--text);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.meta {
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.phone-mock {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 24px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

.phone-mock ul {
  list-style: none;
  display: grid;
  gap: 12px;
}

.phone-mock li {
  background: var(--bg-elevated);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 0.95rem;
}

.phone-mock li span {
  color: var(--accent);
  margin-right: 8px;
}

.features {
  padding: 24px 0 64px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

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

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

.feature-card h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

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

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

.alert {
  padding: 12px 16px;
  border-radius: 12px;
  margin-bottom: 16px;
  font-size: 0.92rem;
}

.alert-warn {
  background: rgba(241, 92, 109, 0.15);
  border: 1px solid rgba(241, 92, 109, 0.4);
  color: #ffb4bc;
}

.alert-ok {
  background: rgba(37, 211, 102, 0.12);
  border: 1px solid rgba(37, 211, 102, 0.35);
  color: #b8f5cd;
}