:root {
  /* Renk Paleti - Light Theme */
  --primary: #0055FF;
  /* Güven veren, canlı mavi */
  --primary-hover: #0044CC;
  --secondary: #0EA5E9;
  /* Açık mavi */
  --accent: #F59E0B;
  /* Turuncu - Uyarı/Önemli */

  --bg-main: #FFFFFF;
  /* Ana arka plan - Beyaz */
  --bg-alt: #F8FAFC;
  /* Alternatif arka plan - Çok açık gri/mavi */
  --bg-card: #FFFFFF;

  --text-primary: #0F172A;
  /* Koyu lacivert/gri - Başlıklar */
  --text-secondary: #475569;
  /* Orta gri - İçerik metinleri */
  --text-light: #94A3B8;

  --border-color: #E2E8F0;

  --gradient-primary: linear-gradient(135deg, #0055FF 0%, #3B82F6 100%);
  --gradient-subtle: linear-gradient(180deg, #F0F5FF 0%, #FFFFFF 100%);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);

  --radius: 20px;
  --container-width: 1200px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-main);
  color: var(--text-secondary);
  line-height: 1.6;
  overflow-x: hidden;
  font-size: 16px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

ul {
  list-style: none;
}

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

.text-center {
  text-align: center;
}

.gradient-text {
  color: var(--primary);
  /* Fallback */
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Header */
header {
  padding: 1rem 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

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

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-link:hover {
  color: var(--primary);
}

.nav-cta {
  background: var(--primary);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  box-shadow: 0 4px 14px 0 rgba(0, 85, 255, 0.39);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 85, 255, 0.23);
  color: white;
}

@media (max-width: 768px) {
  .nav-link {
    display: none;
  }
}

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: var(--gradient-subtle);
  position: relative;
  overflow: hidden;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.badge {
  background: #EFF6FF;
  /* Very light blue */
  color: var(--primary);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 1.5rem;
  border: 1px solid #DBEAFE;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 1.5rem;
  color: #111827;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 540px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.app-store-btn {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  background: #000000;
  /* Apple Black */
  color: white;
  padding: 0.8rem 1.8rem;
  border-radius: 12px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 14px 0 rgba(0, 0, 0, 0.3);
}

.app-store-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.23);
  background: #1a1a1a;
}

.app-store-btn i {
  font-size: 2.2rem;
}

.btn-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  text-align: left;
}

.small-text {
  font-size: 0.75rem;
  font-weight: 500;
  opacity: 0.9;
}

.large-text {
  font-size: 1.2rem;
  font-weight: 600;
}

.hero-trust {
  display: flex;
  gap: 2rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.trust-item i {
  color: #10B981;
  /* Emerald Green for trust */
  font-size: 1.1rem;
}

.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
}

.phone-mockup img {
  width: 100%;
  max-width: 340px;
  filter: drop-shadow(0 25px 50px -12px rgba(0, 0, 0, 0.25));
  animation: float 6s ease-in-out infinite;
}

.floating-card {
  position: absolute;
  background: white;
  padding: 1rem 1.2rem;
  border-radius: 16px;
  display: flex;
  align-items: center;
  gap: 1rem;
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: var(--shadow-lg);
  animation: float-delayed 5s ease-in-out infinite;
  min-width: 240px;
}

.card-1 {
  top: 25%;
  right: 5%;
}

.card-1 i {
  font-size: 1.2rem;
  color: var(--primary);
  background: #EFF6FF;
  padding: 0.8rem;
  border-radius: 12px;
}

.card-1 strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.card-1 small {
  color: var(--text-secondary);
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-20px);
  }
}

@keyframes float-delayed {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-15px);
  }
}

@media (max-width: 768px) {
  .hero {
    padding-top: 120px;
    text-align: center;
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-description {
    margin: 0 auto 2.5rem;
  }

  .hero-actions {
    justify-content: center;
  }

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

  .floating-card {
    display: none;
  }
}

/* Problem/Solution Section */
.problem-solution {
  padding: 100px 0;
  background: white;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  margin-top: 4rem;
}

.problem-card {
  background: white;
  padding: 2.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.problem-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: #CBD5E1;
}

.icon-box {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.icon-box.warning {
  background: #FFF7ED;
  /* Orange Light */
  color: #EA580C;
  /* Orange Dark */
}

.problem-card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.problem-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

/* Solution Transition */
.solution-transition {
  padding: 80px 0;
  position: relative;
  background: var(--bg-alt);
}

.transition-box {
  position: relative;
  z-index: 1;
}

.transition-box h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.transition-box p {
  font-size: 1.2rem;
  color: var(--text-secondary);
}

/* Features Section */
.features {
  padding: 100px 0;
  background: var(--bg-alt);
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.2rem;
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.feature-item {
  display: flex;
  gap: 1.5rem;
  background: white;
  padding: 2.5rem;
  border-radius: var(--radius);
  border: 1px solid rgba(0, 0, 0, 0.03);
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.feature-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: #EFF6FF;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary);
  flex-shrink: 0;
}

.feature-content h3 {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.feature-content p {
  color: var(--text-secondary);
  font-size: 1rem;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* How It Works */
.how-it-works {
  padding: 100px 0;
  background: white;
}

.steps-container {
  display: flex;
  justify-content: space-between;
  margin-top: 5rem;
  position: relative;
}

.step {
  flex: 1;
  text-align: center;
  padding: 0 1.5rem;
  position: relative;
  z-index: 2;
}

.step-number {
  width: 56px;
  height: 56px;
  background: white;
  border: 4px solid #DBEAFE;
  /* Light Blue Border */
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  margin: 0 auto 1.5rem;
  font-size: 1.3rem;
  box-shadow: 0 0 0 4px #F0F9FF;
  /* Double ring effect */
}

.step h3 {
  margin-bottom: 0.8rem;
  font-size: 1.15rem;
}

.step p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.step-connector {
  flex: 1;
  height: 2px;
  background: #E2E8F0;
  margin-top: 28px;
}

@media (max-width: 768px) {
  .steps-container {
    flex-direction: column;
    gap: 3.5rem;
  }

  .step-connector {
    display: none;
  }

  .step-number {
    margin-bottom: 1rem;
  }
}

/* CTA Section */
.cta-section {
  padding: 100px 0;
  background: var(--primary);
  /* Full Blue Background */
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at top right, rgba(255, 255, 255, 0.1), transparent 60%);
  pointer-events: none;
}

.cta-container {
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: white;
}

.cta-content p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  color: rgba(255, 255, 255, 0.9);
}

.app-store-btn.light {
  background: white;
  color: black;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.app-store-btn.light:hover {
  transform: translateY(-2px);
  background: #f8fafc;
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.15);
}

.app-store-btn.light .small-text,
.app-store-btn.light .large-text {
  color: black;
}

/* Footer */
footer {
  padding: 4rem 0;
  background: #F8FAFC;
  border-top: 1px solid var(--border-color);
  font-size: 0.95rem;
}

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

.footer-logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--primary);
}

.footer-links {
  display: flex;
  gap: 2.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-weight: 500;
}

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

.footer-copyright {
  color: #94A3B8;
}

@media (max-width: 768px) {
  .footer-content {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }
}