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

:root {
  --blue:    #2563eb;
  --blue-dk: #1d4ed8;
  --gray-50: #f8fafc;
  --gray-100:#f1f5f9;
  --gray-300:#cbd5e1;
  --gray-500:#64748b;
  --gray-700:#334155;
  --gray-900:#0f172a;
  --green:   #16a34a;
  --radius:  8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--gray-900);
  background: #fff;
  line-height: 1.6;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--gray-100);
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 100;
}

.nav-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-900);
}

.nav-logo span { color: var(--blue); }

nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav ul a { color: var(--gray-700); font-size: 0.95rem; }
nav ul a:hover { color: var(--blue); text-decoration: none; }

.btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.15s;
}

.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dk); text-decoration: none; }
.btn-outline { background: transparent; color: var(--blue); border: 2px solid var(--blue); }
.btn-outline:hover { background: var(--blue); color: #fff; text-decoration: none; }
.btn-lg { padding: 0.85rem 2rem; font-size: 1.05rem; }

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 5rem 2rem 4rem;
  background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 100%);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  max-width: 800px;
  margin: 0 auto 1.25rem;
  color: var(--gray-900);
}

.hero h1 span { color: var(--blue); }

.hero p {
  font-size: 1.15rem;
  color: var(--gray-500);
  max-width: 580px;
  margin: 0 auto 2.5rem;
}

.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ── Stats bar ── */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  padding: 2.5rem 2rem;
  background: var(--gray-900);
  color: #fff;
}

.stat-item { text-align: center; }
.stat-item .number { font-size: 2rem; font-weight: 800; color: #fff; }
.stat-item .label { font-size: 0.85rem; color: var(--gray-300); margin-top: 0.2rem; }

/* ── Features ── */
.features {
  padding: 5rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.section-header p { color: var(--gray-500); font-size: 1.05rem; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2rem;
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  background: var(--gray-50);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; }
.feature-card p { color: var(--gray-500); font-size: 0.95rem; }

/* ── Pricing ── */
.pricing {
  padding: 5rem 2rem;
  background: var(--gray-50);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: #fff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--blue);
  border-width: 2px;
}

.badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--blue);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.85rem;
  border-radius: 99px;
  white-space: nowrap;
}

.plan-name { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; }

.plan-price {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0.75rem 0 0.25rem;
  color: var(--gray-900);
}

.plan-price span { font-size: 1rem; font-weight: 400; color: var(--gray-500); }

.plan-desc { color: var(--gray-500); font-size: 0.9rem; margin-bottom: 1.5rem; }

.plan-features { list-style: none; margin-bottom: 2rem; }

.plan-features li {
  padding: 0.4rem 0;
  font-size: 0.95rem;
  color: var(--gray-700);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.plan-features li::before { content: "✓"; color: var(--green); font-weight: 700; }

.plan-features li.no::before { content: "✗"; color: var(--gray-300); }
.plan-features li.no { color: var(--gray-300); }

.pricing-card .btn { width: 100%; text-align: center; }

/* ── Sign-up modal ── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  align-items: center;
  justify-content: center;
}

.modal-overlay.open { display: flex; }

.modal {
  background: #fff;
  border-radius: var(--radius);
  padding: 2.5rem;
  width: 100%;
  max-width: 440px;
  margin: 1rem;
  position: relative;
}

.modal h2 { font-size: 1.4rem; margin-bottom: 0.5rem; }
.modal p { color: var(--gray-500); font-size: 0.95rem; margin-bottom: 1.5rem; }

.modal-close {
  position: absolute;
  top: 1rem; right: 1.25rem;
  background: none; border: none;
  font-size: 1.5rem; cursor: pointer;
  color: var(--gray-500);
}

.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--gray-700);
}

.form-group input {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s;
}

.form-group input:focus { border-color: var(--blue); }

.form-error { color: #dc2626; font-size: 0.85rem; margin-top: 0.4rem; display: none; }

#signup-result {
  display: none;
  text-align: center;
  padding: 1rem 0;
}

#signup-result .api-key-box {
  background: var(--gray-900);
  color: #a3e635;
  font-family: monospace;
  font-size: 0.85rem;
  padding: 1rem;
  border-radius: var(--radius);
  word-break: break-all;
  margin: 1rem 0;
}

/* ── Code example ── */
.code-section {
  padding: 5rem 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.code-block {
  background: var(--gray-900);
  color: #e2e8f0;
  border-radius: var(--radius);
  padding: 1.5rem;
  overflow-x: auto;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.7;
}

.code-block .comment { color: #64748b; }
.code-block .key { color: #7dd3fc; }
.code-block .string { color: #a3e635; }

/* ── Footer ── */
footer {
  background: var(--gray-900);
  color: var(--gray-300);
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
}

footer a { color: var(--gray-300); }
footer a:hover { color: #fff; }

/* ── Responsive ── */
@media (max-width: 640px) {
  nav ul { display: none; }
  .stats-bar { gap: 1.5rem; }
}