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

:root {
  --accent: #e63946;
  --accent-dark: #c1121f;
  --bg: #ffffff;
  --fg: #171717;
  --muted: #71717a;
  --border: rgba(0, 0, 0, 0.05);
  --surface: #fafafa;
  --card: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --fg: #ededed;
    --muted: #a1a1aa;
    --border: rgba(255, 255, 255, 0.1);
    --surface: #09090b;
    --card: #18181b;
  }
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* Nav */
nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
}

.nav-logo {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--muted);
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--fg);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted);
}

/* Hero */
.hero {
  max-width: 960px;
  margin: 0 auto;
  padding: 6rem 1.5rem;
  text-align: center;
}

.hero-label {
  margin-bottom: 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.hero h1 {
  max-width: 720px;
  margin: 0 auto;
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.025em;
}

.hero p {
  max-width: 560px;
  margin: 1.5rem auto 0;
  font-size: 1.125rem;
  color: var(--muted);
}

.hero-buttons {
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  height: 3rem;
  padding: 0 2rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background 0.15s, border-color 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

.btn-secondary {
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

/* Features */
.features {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.features-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 5rem 1.5rem;
}

.features-inner h2 {
  margin-bottom: 3rem;
  text-align: center;
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.features-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: var(--card);
}

.feature-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
}

.feature-card p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* CTA */
.cta {
  max-width: 960px;
  margin: 0 auto;
  padding: 5rem 1.5rem;
  text-align: center;
}

.cta h2 {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.cta p {
  margin-top: 1rem;
  color: var(--muted);
}

.cta .btn {
  margin-top: 2rem;
}

/* Support page */
.support {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.support h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
}

.support > p {
  margin-top: 1rem;
  font-size: 1.125rem;
  color: var(--muted);
}

.support h2 {
  margin-top: 3.5rem;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

details {
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 1rem 1.5rem;
}

details summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

details summary::-webkit-details-marker {
  display: none;
}

details summary::after {
  content: "+";
  color: var(--muted);
  transition: transform 0.2s;
}

details[open] summary::after {
  transform: rotate(45deg);
}

details p {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

.contact-section p {
  color: var(--muted);
}

.contact-section .btn {
  margin-top: 1.5rem;
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 2.25rem;
  }
}