/* ============================================
   TevkilGo Website - Main Stylesheet
   ============================================ */

/* ============================================
   CSS Variables / Design Tokens
   ============================================ */
:root {
  /* Primary Colors */
  --primary: #4F46E5;
  --primary-dark: #4338CA;
  --primary-light: #6366F1;
  --primary-lighter: #A5B4FC;
  --primary-bg: #EEF2FF;

  /* Secondary Colors */
  --secondary: #0891B2;
  --secondary-dark: #0E7490;
  --secondary-light: #22D3EE;
  --secondary-lighter: #67E8F9;
  --secondary-bg: #ECFEFF;

  /* Neutral Colors */
  --white: #FFFFFF;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;

  /* Text Colors */
  --text-primary: #1F2937;
  --text-secondary: #4B5563;
  --text-muted: #6B7280;
  --text-light: #9CA3AF;

  /* Background Colors */
  --bg-white: #FFFFFF;
  --bg-light: #F9FAFB;
  --bg-alt: #F3F4F6;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient-hero: linear-gradient(135deg, #4F46E5 0%, #0891B2 50%, #06B6D4 100%);
  --gradient-light: linear-gradient(180deg, #FFFFFF 0%, #F9FAFB 100%);

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-tooltip: 1060;

  /* Container Max Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* ============================================
   Typography
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

p {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* ============================================
   Layout
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-4xl) 0;
}

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

.section-lg {
  padding: 6rem 0;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-100);
  transition: var(--transition-base);
}

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

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary);
}

.navbar-brand img {
  height: 40px;
  width: auto;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.navbar-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  background: var(--gray-100);
  border-radius: var(--radius-full);
  padding: 4px;
}

.lang-btn {
  padding: 6px 12px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.lang-btn:hover:not(.active) {
  color: var(--text-primary);
}

/* Mobile Menu Toggle */
.navbar-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.navbar-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

.navbar-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--secondary);
  color: var(--white);
}

.btn-secondary:hover {
  background: var(--secondary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

.btn-white {
  background: var(--white);
  color: var(--primary);
}

.btn-white:hover {
  background: var(--gray-50);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-lg {
  padding: 16px 32px;
  font-size: var(--font-size-base);
  border-radius: var(--radius-xl);
}

.btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-xs);
}

/* Store Buttons */
.store-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  background: var(--gray-900);
  color: var(--white);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.store-btn:hover {
  background: var(--gray-800);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.store-btn svg {
  width: 24px;
  height: 24px;
}

.store-btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.store-btn-text span:first-child {
  font-size: var(--font-size-xs);
  opacity: 0.8;
}

.store-btn-text span:last-child {
  font-size: var(--font-size-base);
  font-weight: 600;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  overflow: hidden;
  background: var(--gradient-light);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: var(--gradient-hero);
  opacity: 0.05;
  border-radius: 0 0 0 50%;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: var(--space-4xl) var(--space-lg);
}

.hero-content {
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 16px;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

.hero-title span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 500px;
}

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

/* Device Mockup */
.device-mockup {
  position: relative;
  width: 280px;
  height: 580px;
  background: var(--gray-900);
  border-radius: 40px;
  padding: 12px;
  box-shadow: var(--shadow-2xl);
  animation: float 6s ease-in-out infinite;
}

.device-mockup::before {
  content: '';
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 28px;
  background: var(--gray-900);
  border-radius: 20px;
  z-index: 10;
}

.device-screen {
  width: 100%;
  height: 100%;
  background: var(--gray-100);
  border-radius: 32px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.device-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.device-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl);
  color: var(--text-muted);
}

.device-placeholder svg {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

/* Second Device (Background) */
.device-mockup-secondary {
  position: absolute;
  right: -60px;
  top: 60px;
  width: 240px;
  height: 500px;
  background: var(--gray-800);
  border-radius: 36px;
  padding: 10px;
  box-shadow: var(--shadow-xl);
  opacity: 0.7;
  animation: float 6s ease-in-out infinite;
  animation-delay: -3s;
  z-index: -1;
}

.device-mockup-secondary .device-screen {
  border-radius: 28px;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* ============================================
   Features Section
   ============================================ */
.features {
  background: var(--bg-white);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-4xl);
}

.section-badge {
  display: inline-block;
  padding: 8px 16px;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-md);
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.feature-card {
  padding: var(--space-2xl);
  background: var(--bg-light);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

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

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: var(--white);
}

.feature-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
}

.feature-description {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
  background: var(--bg-light);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 12.5%;
  width: 75%;
  height: 2px;
  background: var(--gray-200);
  z-index: 0;
}

.step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-lg);
  background: var(--white);
  border: 3px solid var(--primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--primary);
}

.step-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

.step-description {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ============================================
   Screenshots Section
   ============================================ */
.screenshots {
  background: var(--gradient-hero);
  color: var(--white);
  overflow: hidden;
}

.screenshots .section-badge {
  background: rgba(255, 255, 255, 0.2);
  color: var(--white);
}

.screenshots .section-title {
  color: var(--white);
}

.screenshots .section-description {
  color: rgba(255, 255, 255, 0.8);
}

.screenshots-slider {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
  animation: scroll 30s linear infinite;
}

.screenshot-item {
  flex-shrink: 0;
  width: 250px;
  height: 520px;
  background: var(--gray-900);
  border-radius: 36px;
  padding: 10px;
  box-shadow: var(--shadow-2xl);
}

.screenshot-item .device-screen {
  border-radius: 28px;
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
  background: var(--bg-white);
}

.cta-container {
  text-align: center;
  padding: var(--space-4xl);
  background: var(--bg-light);
  border-radius: var(--radius-2xl);
}

.cta-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
}

.cta-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta .store-buttons {
  justify-content: center;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--gray-900);
  color: var(--white);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-4xl);
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.footer-description {
  color: var(--gray-400);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-lg);
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--gray-800);
  border-radius: var(--radius-lg);
  color: var(--gray-400);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--primary);
  color: var(--white);
}

.social-link svg {
  width: 20px;
  height: 20px;
}

.footer-column h4 {
  color: var(--white);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-lg);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  color: var(--gray-400);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid var(--gray-800);
  margin-top: var(--space-4xl);
  padding-top: var(--space-xl);
  text-align: center;
}

.footer-copyright {
  color: var(--gray-500);
  font-size: var(--font-size-sm);
}

/* ============================================
   Page Header (for secondary pages)
   ============================================ */
.page-header {
  padding-top: 120px;
  padding-bottom: var(--space-3xl);
  background: var(--bg-light);
  text-align: center;
}

.page-title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-md);
}

.page-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Content Pages
   ============================================ */
.content-section {
  padding: var(--space-4xl) 0;
}

.content-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.content-container h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
}

.content-container h2:first-child {
  margin-top: 0;
}

.content-container h3 {
  font-size: var(--font-size-xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.content-container p {
  margin-bottom: var(--space-md);
}

.content-container ul,
.content-container ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

.content-container li {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.content-container ul li {
  list-style-type: disc;
}

.content-container ol li {
  list-style-type: decimal;
}

.content-container a {
  color: var(--primary);
  text-decoration: underline;
}

.content-container a:hover {
  color: var(--primary-dark);
}

/* ============================================
   FAQ Section
   ============================================ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--gray-200);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-lg) 0;
  background: none;
  border: none;
  text-align: left;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--primary);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding-bottom: var(--space-lg);
  color: var(--text-secondary);
}

/* ============================================
   Contact Page
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  text-align: center;
  padding: var(--space-2xl);
  background: var(--bg-light);
  border-radius: var(--radius-xl);
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

.contact-icon svg {
  width: 28px;
  height: 28px;
  color: var(--white);
}

.contact-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

.contact-card p {
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.contact-card a {
  color: var(--primary);
  font-weight: 500;
}

/* ============================================
   About Page
   ============================================ */
.about-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.about-image {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.about-content h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-lg);
}

.about-content p {
  margin-bottom: var(--space-md);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
}

.value-card {
  padding: var(--space-xl);
  background: var(--bg-light);
  border-radius: var(--radius-xl);
}

.value-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

.value-card p {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ============================================
   Mobile Navigation Overlay
   ============================================ */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--white);
  z-index: var(--z-modal);
  padding: var(--space-xl);
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  display: block;
  padding: var(--space-md);
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--text-primary);
  border-bottom: 1px solid var(--gray-100);
}

.mobile-menu a:hover {
  color: var(--primary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    order: 1;
  }

  .hero-visual {
    order: 2;
    margin-top: var(--space-2xl);
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .store-buttons {
    justify-content: center;
  }

  .device-mockup-secondary {
    display: none;
  }

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

  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
  }

  .steps::before {
    display: none;
  }

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

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

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
  }

  .navbar-menu {
    display: none;
  }

  .navbar-toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding-top: 100px;
    padding-bottom: var(--space-4xl);
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .device-mockup {
    width: 240px;
    height: 500px;
    border-radius: 32px;
  }

  .device-mockup::before {
    width: 80px;
    height: 24px;
  }

  .device-screen {
    border-radius: 26px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-brand {
    max-width: 100%;
  }

  .footer-social {
    justify-content: center;
  }

  .values-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
  text-align: center;
}

.text-primary {
  color: var(--primary);
}

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

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.hidden {
  display: none !important;
}

/* Language specific content */
[data-lang="tr"] { display: none; }
[data-lang="en"] { display: block; }

html[lang="tr"] [data-lang="tr"] { display: block; }
html[lang="tr"] [data-lang="en"] { display: none; }

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Print Styles */
@media print {
  .navbar,
  .footer,
  .store-buttons {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: var(--space-xl) 0;
  }
}