/* ============================================================
   AriceGen Landing Page — Ana Stil Dosyası
   Tasarım: Dark mode, glassmorphism, gradient kartlar
   Font: Inter (Google Fonts)
   ============================================================ */

/* === CSS Değişkenleri (Design Tokens) === */
:root {
  /* Renkler — Koyu Tema */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.05);
  --border-glass: rgba(255, 255, 255, 0.08);

  /* Accent Renkler */
  --accent-primary: #6366f1;       /* İndigo */
  --accent-secondary: #8b5cf6;     /* Mor */
  --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);
  --accent-glow: rgba(99, 102, 241, 0.3);

  /* Metin Renkleri */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #a78bfa;

  /* Boyutlar */
  --container-max: 1200px;
  --section-padding: 100px 0;
  --border-radius: 16px;
  --border-radius-sm: 8px;
  --border-radius-lg: 24px;

  /* Tipografi */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-hero: clamp(2.5rem, 5vw, 4.5rem);
  --font-size-h2: clamp(1.8rem, 3vw, 2.8rem);
  --font-size-h3: clamp(1.2rem, 2vw, 1.5rem);
  --font-size-body: 1.05rem;
  --font-size-small: 0.9rem;

  /* Geçişler */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s ease;
  --transition-slow: 0.6s ease;
}

/* === Reset & Base === */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Arka plan desenli — dot pattern */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.03) 1px, transparent 0);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--text-accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-primary); }

/* === Container === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* === Section Base === */
section {
  padding: var(--section-padding);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  font-size: var(--font-size-h2);
  font-weight: 800;
  margin-bottom: 16px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  font-size: var(--font-size-body);
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

/* === Navbar === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background var(--transition-medium), backdrop-filter var(--transition-medium);
}

.navbar.scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
}

.navbar-brand span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.navbar-links a {
  color: var(--text-secondary);
  font-size: var(--font-size-small);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.navbar-links a:hover {
  color: var(--text-primary);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Hamburger menü (mobil) */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast);
}

/* === Butonlar === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-small);
  font-weight: 600;
  font-family: var(--font-main);
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1rem;
  border-radius: 12px;
}

/* === Hero === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

/* Gradient orb — dekoratif arka plan */
.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text h1 {
  font-size: var(--font-size-hero);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero-text h1 .gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text .subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

/* LLM logo şeridi */
.hero-trust {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-trust span {
  color: var(--text-muted);
  font-size: var(--font-size-small);
}

.llm-logos {
  display: flex;
  gap: 20px;
  align-items: center;
}

.llm-logos img {
  height: 24px;
  opacity: 0.5;
  filter: grayscale(100%);
  transition: all var(--transition-fast);
}

.llm-logos img:hover {
  opacity: 1;
  filter: grayscale(0);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual img {
  max-width: 100%;
  border-radius: var(--border-radius-lg);
}

/* === Glass Kartlar === */
.glass-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius);
  padding: 32px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-medium);
}

.glass-card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* === Problem Bölümü === */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-card {
  text-align: center;
  padding: 40px 28px;
}

.problem-card .icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
  display: block;
}

.problem-card h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin-bottom: 12px;
}

.problem-card p {
  color: var(--text-secondary);
  font-size: var(--font-size-small);
}

/* === Çözüm / Özellikler === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 36px 28px;
}

.feature-card .icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

/* === Nasıl Çalışır (Steps) === */
.steps-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

/* Bağlayıcı çizgi */
.steps-container::before {
  content: '';
  position: absolute;
  top: 40px;
  left: calc(16.66% + 20px);
  right: calc(16.66% + 20px);
  height: 2px;
  background: var(--accent-gradient);
  opacity: 0.3;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 900;
  margin: 0 auto 24px;
  position: relative;
  z-index: 2;
}

.step h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin-bottom: 12px;
}

.step p {
  color: var(--text-secondary);
  font-size: var(--font-size-small);
}

/* === Fiyatlandırma === */
.pricing-toggle {
  display: flex;
  justify-content: center;
  margin-bottom: 48px;
}

.toggle-wrapper {
  display: inline-flex;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 50px;
  padding: 4px;
}

.toggle-btn {
  padding: 10px 28px;
  border-radius: 50px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--font-size-small);
  font-weight: 600;
  font-family: var(--font-main);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toggle-btn.active {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.pricing-grid {
  display: grid;
  gap: 24px;
}

.pricing-grid.b2c { grid-template-columns: repeat(4, 1fr); }
.pricing-grid.b2b { grid-template-columns: repeat(3, 1fr); }

.pricing-card {
  padding: 36px 28px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.pricing-card.featured {
  border-color: var(--accent-primary);
  box-shadow: 0 0 40px var(--accent-glow);
}

.pricing-card.featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.pricing-badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--accent-gradient);
  color: #fff;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.pricing-card h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 4px;
}

.pricing-card .price-period {
  color: var(--text-muted);
  font-size: var(--font-size-small);
  margin-bottom: 24px;
}

.pricing-card .price-detail {
  color: var(--text-secondary);
  font-size: var(--font-size-small);
  margin-bottom: 24px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 28px;
}

.pricing-features li {
  padding: 8px 0;
  font-size: var(--font-size-small);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features li::before {
  content: '✓';
  color: var(--accent-primary);
  font-weight: 700;
}

.pricing-card .btn { width: 100%; justify-content: center; }

.pricing-hidden { display: none; }

/* === Güven Bölümü === */
.trust-items {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 40px;
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.trust-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.trust-item span {
  color: var(--text-secondary);
  font-size: var(--font-size-small);
  font-weight: 500;
}

/* === CTA Final === */
.cta-section {
  text-align: center;
  padding: 120px 0;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-size: var(--font-size-h2);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 40px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  position: relative;
  z-index: 1;
}

/* === Footer === */
.footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--border-glass);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: var(--font-size-small);
  margin-top: 12px;
  line-height: 1.6;
}

.footer h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.footer-links {
  list-style: none;
}

.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-secondary); font-size: var(--font-size-small); }
.footer-links a:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-glass);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* Dil seçici (Dropdown) */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-select {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  font-family: var(--font-main);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 28px;
  min-width: 120px;
}

.lang-select:hover,
.lang-select:focus {
  border-color: var(--accent-primary);
  color: var(--text-primary);
  outline: none;
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.lang-select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 8px;
}

/* === RTL Desteği (Arapça) === */
[dir="rtl"] {
  direction: rtl;
  text-align: right;
}

[dir="rtl"] .navbar .container {
  flex-direction: row-reverse;
}

[dir="rtl"] .navbar-links {
  flex-direction: row-reverse;
}

[dir="rtl"] .navbar-actions {
  flex-direction: row-reverse;
}

[dir="rtl"] .hero-content {
  direction: rtl;
}

[dir="rtl"] .hero-cta {
  flex-direction: row-reverse;
}

[dir="rtl"] .pricing-features {
  text-align: right;
}

[dir="rtl"] .pricing-features li {
  flex-direction: row-reverse;
}

[dir="rtl"] .footer-bottom {
  flex-direction: row-reverse;
}

[dir="rtl"] .footer-grid {
  direction: rtl;
}

[dir="rtl"] .hero-trust {
  flex-direction: row-reverse;
}

[dir="rtl"] .lang-select {
  background-position: left 8px center;
  padding-right: 12px;
  padding-left: 28px;
}

/* === Scroll Reveal Animasyonları === */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 1024px) {
  .pricing-grid.b2c { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px 0;
  }

  .navbar-links { display: none; }
  .hamburger { display: flex; }

  /* Mobil menü açık durumu */
  .navbar-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(16px);
    padding: 24px;
    border-bottom: 1px solid var(--border-glass);
    gap: 16px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-cta { justify-content: center; flex-wrap: wrap; }
  .hero-trust { justify-content: center; flex-wrap: wrap; }
  .hero-visual { order: -1; margin-bottom: 20px; }

  .problem-grid,
  .features-grid,
  .steps-container {
    grid-template-columns: 1fr;
  }

  .steps-container::before { display: none; }

  .pricing-grid.b2c,
  .pricing-grid.b2b {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .cta-buttons { flex-direction: column; align-items: center; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}