:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #f8fafc;
  --dark: #1e293b;
  --darker: #0f172a;
  --light: #ffffff;
  --accent: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg:
    0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl:
    0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  --bg-primary: var(--light);
  --bg-secondary: var(--secondary);
  --bg-card: var(--light);
  --text-primary: var(--dark);
  --text-secondary: var(--gray-600);
  --border-color: var(--gray-200);
}

.dark {
  --bg-primary: var(--darker);
  --bg-secondary: var(--dark);
  --bg-card: var(--gray-800);
  --text-primary: var(--light);
  --text-secondary: var(--gray-400);
  --border-color: var(--gray-700);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: var(--transition);
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes scaleIn {
  from {
    transform: scale(0.95);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-bounce {
  animation: bounce 2s ease-in-out infinite;
}

.delay-100 {
  animation-delay: 0.1s;
}
.delay-200 {
  animation-delay: 0.2s;
}
.delay-300 {
  animation-delay: 0.3s;
}
.delay-400 {
  animation-delay: 0.4s;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.dark header {
  background: rgba(15, 23, 42, 0.8);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
}

.logo-text {
  font-weight: 700;
  font-size: 20px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 14px;
  transition: var(--transition);
}

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

.theme-toggle {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--primary);
  color: white;
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 20px;
}

/* Hero Section */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(
    135deg,
    var(--bg-secondary) 0%,
    var(--bg-primary) 100%
  );
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(99, 102, 241, 0.1) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(
    circle,
    rgba(6, 182, 212, 0.1) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 24px;
}

.badge i {
  font-size: 12px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.hero h1 span {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 48px;
}

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

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Converter Section */
.converter-section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

.converter-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
}

.converter-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
}

.tab-btn {
  flex: 1;
  padding: 20px;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
}

.tab-btn::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
  transform: scaleX(0);
  transition: var(--transition);
}

.tab-btn.active {
  color: var(--primary);
}

.tab-btn.active::after {
  transform: scaleX(1);
}

.tab-btn:hover:not(.active) {
  background: var(--bg-secondary);
}

.tab-btn.disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.coming-soon-badge {
  font-size: 10px;
  padding: 4px 8px;
  background: linear-gradient(135deg, var(--warning), #fbbf24);
  color: white;
  border-radius: 20px;
  font-weight: 600;
  text-transform: uppercase;
}

.tab-content {
  padding: 32px;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* Upload Area */
.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-secondary);
  position: relative;
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
}

.upload-area.drag-over {
  transform: scale(1.01);
}

.upload-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 28px;
}

.upload-area h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.upload-area p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
}

.upload-formats {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.format-tag {
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.file-input {
  display: none;
}

/* Preview Area */
.preview-area {
  display: none;
  margin-top: 24px;
  animation: scaleIn 0.3s ease;
}

.preview-area.active {
  display: block;
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.preview-box {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.preview-header {
  padding: 12px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.preview-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.preview-size {
  font-size: 12px;
  color: var(--text-secondary);
  padding: 4px 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
}

.preview-image-container {
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: repeating-conic-gradient(
      var(--gray-200) 0% 25%,
      transparent 0% 50%
    )
    50% / 20px 20px;
}

.dark .preview-image-container {
  background: repeating-conic-gradient(
      var(--gray-700) 0% 25%,
      var(--gray-800) 0% 50%
    )
    50% / 20px 20px;
}

.preview-image-container img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.preview-placeholder {
  color: var(--text-secondary);
  text-align: center;
}

.preview-placeholder i {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.3;
}

.preview-placeholder p {
  font-size: 14px;
}

/* Controls */
.controls {
  margin-top: 24px;
  padding: 24px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
}

.quality-control {
  margin-bottom: 24px;
}

.control-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.control-label {
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-label i {
  color: var(--primary);
}

.quality-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.quality-slider {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--border-color);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.quality-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
  transition: var(--transition);
}

.quality-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.quality-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.quality-presets {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.preset-btn {
  flex: 1;
  padding: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.preset-btn:hover,
.preset-btn.active {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
}

.action-buttons {
  display: flex;
  gap: 16px;
}

.btn {
  flex: 1;
  padding: 16px 24px;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-success {
  background: linear-gradient(135deg, var(--success), #059669);
  color: white;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-success:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

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

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

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.loading-overlay.active {
  display: flex;
}

.loading-content {
  background: var(--bg-card);
  padding: 40px;
  border-radius: var(--radius-xl);
  text-align: center;
  animation: scaleIn 0.3s ease;
}

.loading-spinner {
  width: 64px;
  height: 64px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

.loading-text {
  font-size: 16px;
  font-weight: 500;
}

.loading-progress {
  width: 200px;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  margin-top: 16px;
  overflow: hidden;
}

.loading-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  width: 0%;
  transition: width 0.3s ease;
}

/* Coming Soon Tab */
.coming-soon-content {
  text-align: center;
  padding: 48px 24px;
}

.coming-soon-icon {
  width: 100px;
  height: 100px;
  margin: 0 auto 24px;
  background: linear-gradient(
    135deg,
    rgba(245, 158, 11, 0.1),
    rgba(99, 102, 241, 0.1)
  );
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  color: var(--warning);
}

.coming-soon-content h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.coming-soon-content p {
  color: var(--text-secondary);
  max-width: 400px;
  margin: 0 auto 32px;
}

.coming-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.coming-feature {
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.coming-feature i {
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 8px;
}

.coming-feature span {
  display: block;
  font-size: 13px;
  font-weight: 500;
}

.subscribe-form {
  display: flex;
  gap: 12px;
  max-width: 400px;
  margin: 0 auto;
}

.subscribe-input {
  flex: 1;
  padding: 14px 20px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 15px;
  outline: none;
  transition: var(--transition);
}

.subscribe-input:focus {
  border-color: var(--primary);
}

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

.subscribe-btn {
  padding: 14px 24px;
  background: linear-gradient(135deg, var(--warning), #f97316);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.subscribe-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

/* Features Section */
.features-section {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.1),
    rgba(6, 182, 212, 0.1)
  );
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

/* Comparison Section */
.comparison-section {
  padding: 80px 0;
}

.comparison-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  padding: 40px;
  max-width: 800px;
  margin: 0 auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.comparison-table td {
  font-size: 15px;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.format-name {
  display: flex;
  align-items: center;
  gap: 12px;
}

.format-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 11px;
}

.format-icon.jpg {
  background: #fef3c7;
  color: #d97706;
}
.format-icon.png {
  background: #dbeafe;
  color: #2563eb;
}
.format-icon.webp {
  background: #d1fae5;
  color: #059669;
}

.check-icon {
  color: var(--success);
}
.cross-icon {
  color: var(--error);
}

/* Footer */
footer {
  padding: 48px 0 24px;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.footer-text {
  color: var(--text-secondary);
  font-size: 14px;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

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

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  padding: 16px 20px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 300px;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast.success .toast-icon {
  color: var(--success);
}
.toast.error .toast-icon {
  color: var(--error);
}
.toast.warning .toast-icon {
  color: var(--warning);
}
.toast.info .toast-icon {
  color: var(--primary);
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 2px;
}

.toast-message {
  font-size: 13px;
  color: var(--text-secondary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  transition: var(--transition);
}

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

/* Custom Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 3000;
  padding: 24px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 32px;
  max-width: 400px;
  width: 100%;
  animation: scaleIn 0.3s ease;
}

.modal-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.modal-icon.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.modal-icon.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
}

.modal h3 {
  text-align: center;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.modal p {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  gap: 12px;
}

.modal-actions .btn {
  flex: 1;
}

/* Responsive */
/* =========================
   Tablet Responsive (≤1024px)
========================= */
@media (max-width: 1024px) {
  /* Comparison */
  .comparison-section {
    padding: 60px 20px;
  }

  .comparison-card {
    padding: 32px;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 14px;
    font-size: 14px;
  }

  /* Converter */
  .section-header h2 {
    font-size: clamp(22px, 3.5vw, 32px);
  }

  .section-header p {
    font-size: 15px;
  }

  .tab-btn {
    font-size: 14px;
    padding: 16px;
  }

  .tab-content {
    padding: 24px;
  }
}

/* =========================
   Mobile Responsive (≤768px)
========================= */
@media (max-width: 768px) {
  /* Navbar */
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Hero */
  .hero {
    padding: 120px 0 60px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

  /* Comparison */
  .comparison-section {
    padding: 48px 16px;
  }

  .comparison-card {
    padding: 24px;
    overflow-x: auto;
  }

  .comparison-table {
    min-width: 640px;
  }

  .comparison-table th {
    font-size: 12px;
  }

  .comparison-table td {
    font-size: 14px;
  }

  .format-icon {
    width: 32px;
    height: 32px;
    font-size: 10px;
  }

  /* Converter */
  .converter-section {
    padding: 56px 16px;
  }

  .section-header {
    margin-bottom: 32px;
  }

  .section-header h2 {
    font-size: 22px;
  }

  .section-header p {
    font-size: 14px;
    line-height: 1.6;
  }

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

  .tab-btn {
    font-size: 13px;
    padding: 14px 10px;
    gap: 6px;
  }

  .coming-soon-badge {
    font-size: 9px;
    padding: 3px 6px;
  }

  .action-buttons,
  .subscribe-form {
    flex-direction: column;
  }

  /* Footer & Toast */
  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .toast-container {
    left: 16px;
    right: 16px;
    bottom: 16px;
  }

  .toast {
    min-width: auto;
  }
}

/* =========================
   Small Mobile (≤480px)
========================= */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  /* Comparison */
  .comparison-card {
    padding: 20px;
    border-radius: var(--radius-lg);
  }

  .comparison-table {
    min-width: 600px;
  }

  .format-name {
    gap: 8px;
  }

  /* Converter */
  .converter-card {
    border-radius: var(--radius);
  }

  .section-header h2 {
    font-size: 20px;
  }

  .section-header p {
    font-size: 13px;
  }

  .tab-btn {
    font-size: 12px;
    padding: 12px 8px;
  }

  .tab-btn i {
    font-size: 14px;
  }

  .tab-content {
    padding: 16px;
  }

  .upload-area {
    padding: 32px 16px;
  }

  .controls {
    padding: 16px;
  }

  .quality-presets {
    flex-wrap: wrap;
  }

  .preset-btn {
    width: calc(50% - 4px);
  }
}

/* =========================
   Accessibility
========================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* =========================
   Focus Styles
========================= */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}