/* ========================================
   WindPro — Landing Page Styles
   ======================================== */

:root {
  --primary: #0f172a;
  --primary-light: #1e293b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: rgba(59, 130, 246, 0.1);
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-dark: #0f172a;
  --border: #e2e8f0;
  --radius: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  border-radius: 8px;
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius);
  font-weight: 600 !important;
}
.nav-cta:hover { background: var(--accent-hover) !important; }

/* ── Buttons ────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3); }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-alt); color: var(--text); }
.btn-outline { background: transparent; color: var(--accent); border: 2px solid var(--accent); }
.btn-outline:hover { background: var(--accent); color: #fff; }

/* ── Hero ───────────────────────────────── */
.hero {
  padding: 140px 24px 80px;
  text-align: center;
  background: linear-gradient(180deg, #f8fafc 0%, #fff 100%);
}
.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
  color: var(--primary);
}
.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  gap: 48px;
  justify-content: center;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
}
.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ── Section Header ─────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
}

/* ── Features ───────────────────────────── */
.features {
  padding: 80px 0;
  background: var(--bg);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card {
  padding: 28px 24px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.2s;
}
.feature-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.08);
  transform: translateY(-2px);
}
.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
}
.feature-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── How It Works ───────────────────────── */
.how-it-works {
  padding: 80px 0;
  background: var(--bg-alt);
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.step {
  text-align: center;
  padding: 32px 24px;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 16px;
}
.step h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Sponsors ───────────────────────────── */
.sponsors {
  padding: 80px 0;
  background: var(--bg);
}
.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.sponsor-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 40px 24px;
  background: var(--bg-alt);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.2s;
}
.sponsor-slot:hover { border-color: var(--accent); }
.sponsor-placeholder {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
}
.sponsor-label {
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.sponsor-cta {
  text-align: center;
  padding: 32px;
  background: var(--accent-light);
  border-radius: var(--radius-lg);
}
.sponsor-cta p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* ── Final CTA ──────────────────────────── */
.final-cta {
  padding: 80px 0;
  background: var(--bg-dark);
  text-align: center;
}
.final-cta h2 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.final-cta p {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* ── Footer ─────────────────────────────── */
.footer {
  padding: 40px 0;
  background: var(--bg-dark);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-brand .logo-icon { width: 28px; height: 28px; font-size: 14px; }
.footer-brand .logo-text { font-size: 16px; color: #fff; }
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 13px;
  transition: color 0.15s;
}
.footer-links a:hover { color: #fff; }
.footer-copy {
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Responsive ─────────────────────────── */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .sponsor-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .hero { padding: 120px 16px 60px; }
  .hero h1 { font-size: 36px; }
  .hero-sub { font-size: 16px; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 22px; }
  .steps { grid-template-columns: 1fr; gap: 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .sponsor-grid { grid-template-columns: 1fr 1fr; }
  .nav-links a:not(.nav-cta) { display: none; }
  .footer-inner { flex-direction: column; text-align: center; }
  .section-header h2 { font-size: 26px; }
}