:root {
  --color-bg: #0f172a;
  --color-bg-alt: #111c33;
  --color-surface: #16213d;
  --color-text: #e6ebf5;
  --color-text-muted: #aab4c8;
  --color-primary: #4cc9f0;
  --color-primary-dark: #2bb1d8;
  --color-border: #233252;
  --radius: 12px;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  line-height: 1.25;
  margin: 0 0 16px;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  text-align: center;
}

p {
  margin: 0 0 16px;
  color: var(--color-text-muted);
}

a {
  color: var(--color-primary);
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

/* Buttons */
.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius);
  padding: 14px 28px;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #0f172a;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn-small {
  padding: 8px 18px;
  font-size: 0.9rem;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

/* Hero */
.hero {
  padding: 96px 0 72px;
  text-align: center;
}

.hero-inner {
  max-width: 720px;
}

.hero-sub {
  font-size: 1.15rem;
  margin-bottom: 32px;
}

.hero-note {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* Sections */
.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-sub {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 40px;
}

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 40px;
}

.step {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #0f172a;
  font-weight: 700;
  margin-bottom: 16px;
}

/* Feature list */
.feature-list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.feature-list strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-text);
  font-size: 1.05rem;
}

.feature-list span {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Pricing */
.pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.price-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}

.price-card-highlight {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.price {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.price-stars {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-text-muted);
  display: block;
  margin-top: 4px;
}

.pricing-note {
  text-align: center;
  font-size: 0.8rem;
  margin-top: 20px;
  color: var(--color-text-muted);
}

/* FAQ */
.faq-list {
  max-width: 720px;
  margin: 40px auto 0;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 24px;
  margin-bottom: 12px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text);
}

.faq-item p {
  margin-top: 12px;
  margin-bottom: 0;
}

/* CTA footer */
.cta-footer {
  text-align: center;
  padding: 80px 0;
  background: var(--color-bg-alt);
}

/* Site footer */
.site-footer {
  padding: 32px 0;
  text-align: center;
  font-size: 0.85rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 768px) {
  .steps,
  .feature-list,
  .pricing-cards {
    grid-template-columns: 1fr;
  }
}