/* Trendyol Entegrasyon Web Sitesi - Modern Minimalism Premium (Mor Tema) */
/* Design Tokens CSS Variables */

:root {
  /* Color System */
  --color-primary-50: #F5F3FF;
  --color-primary-100: #EDE9FE;
  --color-primary-400: #A78BFA;
  --color-primary-500: #7C3AED;
  --color-primary-600: #6D28D9;
  
  --color-neutral-50: #FAFAFA;
  --color-neutral-100: #F5F5F5;
  --color-neutral-200: #E5E5E5;
  --color-neutral-500: #A3A3A3;
  --color-neutral-700: #404040;
  --color-neutral-900: #171717;
  
  --color-semantic-success: #10B981;
  --color-semantic-warning: #F59E0B;
  --color-semantic-error: #EF4444;
  --color-semantic-info: #06B6D4;
  
  --color-background-page: var(--color-neutral-50);
  --color-background-surface: var(--color-neutral-100);
  --color-background-elevated: #FFFFFF;
  
  /* Typography */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  --font-size-hero: 72px;
  --font-size-title: 48px;
  --font-size-subtitle: 32px;
  --font-size-body-large: 20px;
  --font-size-body: 16px;
  --font-size-small: 14px;
  --font-size-button: 16px;
  
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.1;
  --line-height-snug: 1.2;
  --line-height-normal: 1.3;
  --line-height-relaxed: 1.5;
  --line-height-loose: 1.6;
  
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.01em;
  
  /* Spacing (8px Grid) */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Box Shadow */
  --shadow-sm: 0 1px 3px rgba(124, 58, 237, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px rgba(124, 58, 237, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px rgba(124, 58, 237, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  
  /* Animation */
  --duration-fast: 200ms;
  --duration-base: 250ms;
  --duration-slow: 300ms;
  --easing-out: cubic-bezier(0, 0, 0.2, 1);
  --easing-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-relaxed);
  color: var(--color-neutral-900);
  background-color: var(--color-background-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container & Layout */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-2xl);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
}

/* Typography */
h1, .hero-text {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-neutral-900);
  margin-bottom: var(--spacing-md);
}

h2, .title {
  font-size: var(--font-size-title);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-snug);
  letter-spacing: var(--letter-spacing-normal);
  color: var(--color-neutral-900);
  margin-bottom: var(--spacing-sm);
}

h3, .subtitle {
  font-size: var(--font-size-subtitle);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-normal);
  color: var(--color-neutral-900);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
}

.lead {
  font-size: var(--font-size-body-large);
  line-height: var(--line-height-loose);
  color: var(--color-neutral-700);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--color-background-elevated);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-neutral-200);
  z-index: 50;
  transition: all var(--duration-base) var(--easing-out);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-500);
  text-decoration: none;
  height: 32px;
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--color-neutral-700);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--easing-out);
}

.nav-link:hover {
  color: var(--color-primary-500);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-primary-600);
  border-bottom: 2px solid var(--color-primary-500);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--color-neutral-700);
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 64px;
    right: -100%;
    width: 100%;
    height: calc(100vh - 64px);
    background: var(--color-background-elevated);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--spacing-xl);
    transition: right var(--duration-base) var(--easing-out);
    box-shadow: var(--shadow-lg);
    z-index: 49;
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-links li {
    margin: var(--spacing-md) 0;
  }
  
  .nav-link {
    font-size: var(--font-size-body-large);
    padding: var(--spacing-md);
  }
  
  .nav-toggle {
    display: block;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 56px;
  padding: 0 var(--spacing-md);
  font-size: var(--font-size-button);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--duration-base) var(--easing-out);
  min-width: 160px;
}

.btn-primary {
  background: var(--color-primary-500);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-primary-600);
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--color-neutral-700);
  border: 2px solid var(--color-neutral-200);
}

.btn-secondary:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-400);
  text-decoration: none;
  color: var(--color-primary-500);
}

.btn-lg {
  height: 64px;
  padding: 0 var(--spacing-lg);
  font-size: var(--font-size-body-large);
}

/* Cards */
.card {
  background: var(--color-background-surface);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-base) var(--easing-out);
}

.card:hover {
  background: var(--color-background-elevated);
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-md);
}

.card-featured {
  transform: scale(1.05);
  border-color: var(--color-primary-500);
  box-shadow: var(--shadow-md);
}

/* Sections */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-sm {
  padding: var(--spacing-2xl) 0;
}

/* Grid Systems */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

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

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

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Hero Section */
.hero {
  padding: calc(64px + var(--spacing-3xl)) 0 var(--spacing-3xl);
  background: var(--color-background-page);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero-content {
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  flex-wrap: wrap;
}

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

.hero-visual img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  h1 {
    font-size: 40px;
  }
  
  h2 {
    font-size: 32px;
  }
  
  h3 {
    font-size: 24px;
  }
}

/* Pricing Cards */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

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

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

.pricing-price {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-500);
  margin: var(--spacing-lg) 0;
}

.pricing-features {
  list-style: none;
  margin: var(--spacing-lg) 0;
  text-align: left;
}

.pricing-features li {
  padding: var(--spacing-xs) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-features li::before {
  content: '✓';
  color: var(--color-semantic-success);
  font-weight: var(--font-weight-bold);
}

/* Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
  background: var(--color-background-elevated);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.comparison-table th,
.comparison-table td {
  padding: var(--spacing-sm);
  text-align: center;
  border-bottom: 1px solid var(--color-neutral-200);
}

.comparison-table th {
  background: var(--color-background-surface);
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-900);
}

.comparison-table td:first-child {
  text-align: left;
  font-weight: var(--font-weight-medium);
}

/* FAQ Accordion */
.faq-item {
  background: var(--color-background-elevated);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: var(--spacing-md);
  background: none;
  border: none;
  text-align: left;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question:hover {
  background: var(--color-background-surface);
}

.faq-answer {
  padding: 0 var(--spacing-md) var(--spacing-md);
  display: none;
  color: var(--color-neutral-700);
}

.faq-answer.active {
  display: block;
}

/* Contact Form */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-neutral-700);
}

.form-input,
.form-textarea {
  width: 100%;
  height: 48px;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  font-size: var(--font-size-body);
  font-family: inherit;
  transition: all var(--duration-fast) var(--easing-out);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Footer */
.footer {
  background: var(--color-neutral-900);
  color: white;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  color: white;
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-section ul li a {
  color: var(--color-neutral-500);
  text-decoration: none;
  transition: color var(--duration-fast) var(--easing-out);
}

.footer-section ul li a:hover {
  color: var(--color-primary-400);
}

.footer-bottom {
  border-top: 1px solid var(--color-neutral-700);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: var(--color-neutral-500);
}

/* Utilities */
.text-center {
  text-align: center;
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp var(--duration-slow) var(--easing-out);
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}