:root {
  --bg: #0e1116;
  --surface: #131823;
  --surface-alt: #161d2b;
  --accent: #4de1c1;
  --text: #eef2f7;
  --muted: #9aa7b5;
  --danger: #ff6b6b;
  --border: #1f2633;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding-bottom: 64px;
}

h1, h2, h3 {
  margin: 0 0 8px;
  font-weight: 700;
}

p {
  margin: 0;
}

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px 64px;
}

.hero {
  max-width: 1040px;
  margin: 0 auto;
  padding: 32px 20px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.logo-block {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-circle {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, #58ffd6, #1e7fe6);
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #0b111d;
  letter-spacing: 0.5px;
}

.logo-circle.small {
  width: 40px;
  height: 40px;
  font-size: 12px;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
}

.brand-tagline {
  color: var(--muted);
  font-size: 14px;
}

.hero-text h1 {
  font-size: 28px;
}

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

.section-header {
  margin-bottom: 12px;
}

.section-header .muted {
  font-size: 14px;
}

.plans {
  margin-top: 12px;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.plan-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}

.plan-title {
  font-weight: 700;
  font-size: 18px;
}

.plan-price {
  font-size: 28px;
  font-weight: 700;
}

.plan-detail, .plan-desc {
  color: var(--muted);
  font-size: 14px;
}

.btn {
  background: var(--surface-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn.primary {
  background: var(--accent);
  color: #0b111d;
  border: none;
}

.btn.primary:hover {
  filter: brightness(1.05);
}

.cart {
  margin-top: 28px;
}

.cart-table {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}

.cart-head, .cart-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr 0.8fr 1fr 1fr 0.6fr;
  gap: 8px;
  padding: 12px 16px;
  align-items: center;
}

.cart-head {
  background: var(--surface-alt);
  color: var(--muted);
  font-size: 14px;
}

.cart-row:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

.cart-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.cart-total-label {
  color: var(--muted);
}

.cart-total-value {
  font-weight: 700;
  font-size: 18px;
}

.qty-input {
  width: 80px;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--text);
}

.link {
  background: transparent;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-weight: 600;
}

.link.danger {
  color: var(--danger);
}

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

.empty {
  text-align: center;
  padding: 16px;
}

.checkout {
  margin-top: 28px;
}

.form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
}

.form-field input, .form-field select {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--text);
}

.form-row {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  color: var(--text);
}

.form-actions {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-message {
  margin-top: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  min-height: 44px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
}

.form-message.success {
  border-color: #3dd598;
  color: #3dd598;
}

.form-message.error {
  border-color: var(--danger);
  color: var(--danger);
}

.form-message.info {
  border-color: var(--border);
  color: var(--text);
}

.note {
  font-size: 13px;
  line-height: 1.4;
}

.footer {
  max-width: 1040px;
  margin: 32px auto 0;
  padding: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

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

.footer a:hover {
  text-decoration: underline;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-legal, .footer-links {
  font-size: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

@media (max-width: 768px) {
  .cart-head, .cart-row {
    grid-template-columns: 1.2fr 1fr 0.9fr 1.2fr 1fr 0.7fr;
  }

  .hero {
    flex-direction: column;
    align-items: flex-start;
  }
}