:root {
  --bg-body: #020617;
  --bg-card: rgba(15, 23, 42, 0.65);
  --bg-card-strong: rgba(15, 23, 42, 0.88);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #22d3ee;
  --accent-strong: #06b6d4;
  --line: rgba(148, 163, 184, 0.18);
  --danger: #f87171;
  --radius: 16px;
  --shadow: 0 24px 60px rgba(2, 8, 23, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text-primary);
  font-family: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: var(--bg-body);
}

.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 0% 0%, rgba(34, 211, 238, 0.18), transparent 45%),
    radial-gradient(circle at 100% 100%, rgba(14, 165, 233, 0.12), transparent 50%),
    linear-gradient(180deg, #020617 0%, #020617 60%, #01040f 100%);
}

.site-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.08;
  pointer-events: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(2, 6, 23, 0.82);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.brand-dot {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: #001018;
  background: var(--accent);
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.45);
}

.brand-text {
  text-transform: uppercase;
  font-weight: 800;
}

.top-links,
.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.top-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 700;
}

.top-links a:hover {
  color: var(--accent);
}

.container {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 32px 20px 60px;
}

.section {
  margin-bottom: 42px;
}

.section-tight {
  margin-bottom: 24px;
}

.section-title {
  margin: 0 0 10px;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  font-weight: 800;
}

.hero {
  margin-top: 28px;
  margin-bottom: 44px;
}

.hero-chip {
  display: inline-block;
  margin-bottom: 14px;
  border: 1px solid rgba(34, 211, 238, 0.4);
  background: rgba(34, 211, 238, 0.12);
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(2.3rem, 6vw, 4.8rem);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.hero h1 span {
  color: var(--accent);
  text-shadow: 0 0 16px rgba(34, 211, 238, 0.65);
}

.hero-copy {
  margin: 0;
  max-width: 780px;
  color: var(--text-secondary);
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  line-height: 1.65;
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.feature-grid,
.pricing-grid,
.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow);
  padding: 22px;
}

.card h3,
.card h2,
.card h1 {
  margin: 0 0 10px;
}

.card p {
  margin: 0;
  color: var(--text-secondary);
}

.plan {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-active {
  border-color: rgba(34, 211, 238, 0.52);
  background: var(--bg-card-strong);
}

.plan-selected {
  border-color: rgba(34, 211, 238, 0.52);
}

.price {
  margin: 0;
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.price span {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-left: 4px;
}

ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-secondary);
}

.btn {
  border-radius: 12px;
  border: 1px solid transparent;
  padding: 10px 14px;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #00131c;
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.35);
}

.btn-primary:hover {
  background: var(--accent-strong);
}

.btn-ghost {
  border-color: var(--line);
  background: rgba(15, 23, 42, 0.55);
  color: var(--text-primary);
}

.btn-disabled {
  border-color: rgba(148, 163, 184, 0.2);
  background: rgba(15, 23, 42, 0.35);
  color: var(--text-muted);
  cursor: not-allowed;
}

.btn-xl {
  padding: 14px 20px;
  font-size: 13px;
}

.auth-card {
  max-width: 540px;
  margin: 36px auto 0;
}

.narrow {
  max-width: 540px;
  margin: 36px auto 0;
}

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

.form {
  display: grid;
  gap: 10px;
}

label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text-muted);
  font-weight: 700;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 12px;
  color: var(--text-primary);
  background: rgba(15, 23, 42, 0.76);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
}

input:focus-visible {
  outline: 2px solid rgba(34, 211, 238, 0.5);
  outline-offset: 0;
  border-color: rgba(34, 211, 238, 0.45);
}

.separator {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 18px 0 14px;
}

.actions-inline {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.alert {
  margin: 0 0 14px;
  padding: 10px 12px;
  border: 1px solid rgba(248, 113, 113, 0.38);
  border-radius: 10px;
  background: rgba(248, 113, 113, 0.12);
  color: #fecaca;
}

.badge {
  align-self: flex-start;
  border-radius: 999px;
  border: 1px solid rgba(34, 211, 238, 0.45);
  padding: 6px 10px;
  color: var(--accent);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
}

.kv {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.kv li {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  border-bottom: 1px dashed var(--line);
  padding-bottom: 8px;
}

.kv span {
  color: var(--text-muted);
}

.faq-section {
  margin-top: 10px;
}

.faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.55);
  padding: 0 14px;
}

.faq-item summary {
  cursor: pointer;
  padding: 14px 0;
  font-weight: 700;
}

.faq-item p {
  margin: 0 0 14px;
}

@media (max-width: 900px) {
  .top-links {
    display: none;
  }
}

@media (max-width: 640px) {
  .topbar {
    padding: 12px 14px;
  }

  .top-actions {
    gap: 6px;
  }

  .btn {
    font-size: 11px;
    letter-spacing: 0.06em;
    padding: 9px 10px;
  }

  .container {
    padding: 18px 14px 46px;
  }
}