/* AEO Merkezi — Landing Stylesheet */

:root {
  --bg: #0a0e1a;
  --bg-elevated: #131829;
  --bg-card: #1a2138;
  --text: #f0f3fa;
  --text-muted: #8892b0;
  --accent: #00d4aa;
  --accent-soft: rgba(0, 212, 170, 0.12);
  --border: #232a44;
  --warning: #ffb84d;
  --max-width: 1100px;
  --radius: 14px;
}

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

html { scroll-behavior: smooth; }

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

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

/* NAV */
.nav {
  position: sticky;
  top: 0;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
}
.logo {
  font-weight: 800;
  font-size: 20px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-cta {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}

/* HERO */
.hero {
  padding: 100px 0 80px;
  text-align: center;
  background: radial-gradient(ellipse at center top, rgba(0, 212, 170, 0.08), transparent 60%);
}
.hero-badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 28px;
  border: 1px solid rgba(0, 212, 170, 0.3);
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 24px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
.hero-sub {
  font-size: 19px;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 36px;
  line-height: 1.65;
}
.hero-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--text-muted);
}

/* Buttons */
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #0a0e1a;
  font-weight: 700;
  padding: 16px 32px;
  border-radius: 100px;
  text-decoration: none;
  font-size: 16px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 212, 170, 0.3);
}
.btn-large {
  padding: 20px 44px;
  font-size: 18px;
}

/* Section base */
section { padding: 80px 0; }
section h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  text-align: center;
}
.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 17px;
  margin-bottom: 48px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* PROBLEM */
.problem { background: var(--bg-elevated); }
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 40px;
  margin-bottom: 32px;
}
.problem-card {
  background: var(--bg-card);
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.problem-q {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  font-style: italic;
}
.problem-a {
  color: var(--text-muted);
  font-size: 15px;
}
.problem-note {
  text-align: center;
  padding: 20px 28px;
  background: var(--accent-soft);
  border-radius: var(--radius);
  color: var(--text);
  max-width: 700px;
  margin: 0 auto;
  font-size: 16px;
  border: 1px solid rgba(0, 212, 170, 0.2);
}

/* SOLUTION */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
  margin-top: 16px;
}
.solution-card {
  background: var(--bg-card);
  padding: 32px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.solution-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}
.solution-num {
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}
.solution-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}
.solution-card p {
  color: var(--text-muted);
  font-size: 15px;
}

/* PROCESS */
.process { background: var(--bg-elevated); }
.process-list {
  list-style: none;
  max-width: 760px;
  margin: 0 auto;
}
.process-list li {
  padding: 18px 24px;
  background: var(--bg-card);
  border-radius: 10px;
  margin-bottom: 12px;
  font-size: 16px;
  border-left: 3px solid var(--accent);
}
.process-list strong {
  color: var(--accent);
  margin-right: 12px;
  display: inline-block;
  min-width: 100px;
}

/* PRICE */
.price-card {
  background: var(--bg-card);
  padding: 48px 36px;
  border-radius: var(--radius);
  border: 2px solid var(--accent);
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.price-card::before {
  content: 'FOUNDING';
  position: absolute;
  top: 16px;
  right: -28px;
  background: var(--accent);
  color: #0a0e1a;
  padding: 4px 32px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.15em;
  transform: rotate(35deg);
}
.price-tag {
  font-size: 64px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.price-detail {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 28px;
}
.price-detail p { margin-bottom: 6px; }
.price-features {
  list-style: none;
  margin-bottom: 36px;
  text-align: left;
  display: inline-block;
}
.price-features li {
  padding: 8px 0 8px 28px;
  position: relative;
  font-size: 15px;
}
.price-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* FAQ */
.faq { background: var(--bg-elevated); }
.faq details {
  background: var(--bg-card);
  padding: 22px 26px;
  border-radius: 10px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  transition: border-color 0.15s ease;
}
.faq details[open] { border-color: var(--accent); }
.faq summary {
  font-weight: 600;
  font-size: 17px;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 32px;
}
.faq summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  color: var(--accent);
  font-weight: 300;
  transition: transform 0.2s ease;
}
.faq details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}
.faq summary::-webkit-details-marker { display: none; }
.faq details p {
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.65;
}

/* CONTACT */
.contact { text-align: center; }
.contact-buttons {
  margin-top: 12px;
  margin-bottom: 28px;
}
.contact-note {
  font-size: 14px;
  color: var(--text-muted);
}

/* FOOTER */
.footer {
  padding: 36px 0;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer p {
  color: var(--text-muted);
  font-size: 14px;
}
.footer-note {
  margin-top: 8px;
  font-size: 12px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Mobile */
@media (max-width: 640px) {
  .hero { padding: 64px 0 56px; }
  section { padding: 56px 0; }
  .price-card { padding: 32px 22px; }
  .price-tag { font-size: 48px; }
  .process-list strong { display: block; margin-bottom: 6px; }
}