/* RESET & BASE STYLES */
:root {
  --primary: #8b5cf6;
  --primary-dark: #7c3aed;
  --primary-light: #a78bfa;
  --secondary: #10b981;
  --accent: #f59e0b;
  --danger: #ef4444;
  --success: #10b981;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --light: #f8fafc;
  --gray: #64748b;
  --gray-light: #e2e8f0;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(255, 255, 255, 0.1);
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.3);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--dark);
  color: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
  transition: var(--transition);
}

body.light-mode {
  --dark: #f8fafc;
  --dark-light: #e2e8f0;
  --light: #0f172a;
  --gray: #94a3b8;
  --gray-light: #475569;
  --card-bg: rgba(255, 255, 255, 0.9);
  --card-border: rgba(0, 0, 0, 0.1);
}

h1, h2, h3, h4 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
}

/* BACKGROUND ANIMATION */
.background-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.gradient-circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
}

.circle-1 {
  width: 400px;
  height: 400px;
  background: var(--primary);
  top: -200px;
  right: -100px;
  animation: float 20s infinite alternate;
}

.circle-2 {
  width: 300px;
  height: 300px;
  background: var(--secondary);
  bottom: -150px;
  left: -100px;
  animation: float 25s infinite alternate-reverse;
}

.circle-3 {
  width: 200px;
  height: 200px;
  background: var(--accent);
  top: 50%;
  left: 70%;
  animation: float 15s infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, -30px) scale(1.1); }
}

/* NAVBAR */
.navbar {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo i {
  font-size: 28px;
  color: var(--primary);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo h1 {
  font-size: 24px;
  font-weight: 700;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 25px;
}

.nav-links a {
  color: var(--gray);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

.nav-links a:hover {
  color: var(--primary);
  background: rgba(139, 92, 246, 0.1);
}

.theme-toggle {
  display: flex;
  align-items: center;
  background: var(--dark-light);
  border: none;
  padding: 5px;
  border-radius: 50px;
  cursor: pointer;
  position: relative;
  width: 60px;
  height: 30px;
}

.theme-toggle i {
  font-size: 14px;
  color: var(--light);
  z-index: 2;
  position: relative;
  padding: 0 5px;
}

.theme-toggle .toggle-circle {
  position: absolute;
  left: 3px;
  top: 3px;
  width: 24px;
  height: 24px;
  background: var(--primary);
  border-radius: 50%;
  transition: var(--transition);
}

body.light-mode .theme-toggle .toggle-circle {
  left: 33px;
}

/* HEADER SECTION */
.header-section {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.header-content {
  animation: slideInLeft 0.8s ease;
}

.main-title {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 15px;
}

.highlight {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
}

.highlight::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

.subtitle {
  font-size: 1.2rem;
  color: var(--gray);
  margin-bottom: 30px;
  max-width: 500px;
}

.header-stats {
  display: flex;
  gap: 25px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(139, 92, 246, 0.1);
  padding: 10px 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(139, 92, 246, 0.2);
}

.stat i {
  color: var(--primary);
  font-size: 18px;
}

.stat span {
  font-size: 14px;
  font-weight: 500;
}

.header-illustration {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: slideInRight 0.8s ease;
}

.icon-animation {
  width: 300px;
  height: 200px;
  position: relative;
}

.icon-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
}

.icon-item {
  width: 80px;
  height: 80px;
  background: var(--card-bg);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: var(--primary);
  box-shadow: var(--shadow);
  transition: var(--transition);
  animation: bounce 2s infinite;
}

.icon-item:nth-child(1) {
  animation-delay: 0s;
}

.icon-item:nth-child(2) {
  animation-delay: 0.2s;
  color: var(--accent);
}

.icon-item:nth-child(3) {
  animation-delay: 0.4s;
  color: var(--secondary);
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* MAIN WRAPPER */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto 60px;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

@media (max-width: 1024px) {
  .main-wrapper {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
  padding: 30px;
  box-shadow: var(--shadow);
}

.panel-header {
  margin-bottom: 25px;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--card-border);
}

.panel-header h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.panel-header h2 i {
  color: var(--primary);
}

.panel-header p {
  color: var(--gray);
  font-size: 14px;
}

/* UPLOAD SECTION */
.upload-section {
  margin-bottom: 30px;
}

.upload-area {
  background: rgba(255, 255, 255, 0.05);
  border: 3px dashed var(--card-border);
  border-radius: var(--radius);
  padding: 50px 30px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.upload-area:hover, .upload-area.dragover {
  border-color: var(--primary);
  background: rgba(139, 92, 246, 0.1);
  transform: translateY(-5px);
}

.upload-icon {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 20px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.upload-area h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.upload-area p {
  color: var(--gray);
  margin-bottom: 15px;
}

.file-types {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  padding: 6px 15px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--gray);
}

#imageInput {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.uploaded-images {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.uploaded-image {
  position: relative;
  width: 60px;
  height: 60px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.uploaded-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.uploaded-image .remove-image {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 20px;
  height: 20px;
  background: var(--danger);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.uploaded-image:hover .remove-image {
  opacity: 1;
}

/* PREVIEW SECTION */
.preview-section {
  margin-bottom: 30px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.section-header h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
}

.btn-clear {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  transition: var(--transition);
}

.btn-clear:hover {
  background: rgba(239, 68, 68, 0.2);
}

.image-preview-container {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius);
  padding: 20px;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.empty-preview {
  text-align: center;
  color: var(--gray);
}

.empty-preview i {
  font-size: 48px;
  margin-bottom: 15px;
  opacity: 0.5;
}

.empty-preview p {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 5px;
}

.empty-preview span {
  font-size: 14px;
}

.image-preview {
  width: 100%;
  max-height: 300px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
}

.image-preview img {
  max-width: 100%;
  max-height: 250px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

.image-info {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  padding: 15px;
  border-radius: var(--radius-sm);
}

.image-info-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 14px;
}

.image-info-item:last-child {
  margin-bottom: 0;
}

.image-info-label {
  color: var(--gray);
}

.image-info-value {
  font-weight: 500;
}

/* FORMAT SECTION */
.format-section {
  margin-bottom: 30px;
}

.format-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.format-tab {
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 15px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.format-tab:hover {
  background: rgba(139, 92, 246, 0.1);
  border-color: var(--primary);
}

.format-tab.active {
  background: rgba(139, 92, 246, 0.2);
  border-color: var(--primary);
  color: var(--primary);
}

.format-tab i {
  font-size: 24px;
}

.format-tab span {
  font-weight: 600;
  font-size: 14px;
}

.format-tab small {
  font-size: 12px;
  color: var(--gray);
  opacity: 0.8;
}

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

/* SETTINGS SECTION */
.settings-section {
  margin-bottom: 30px;
}

.selected-count {
  background: rgba(139, 92, 246, 0.2);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.sizes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.size-option {
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.size-option:hover {
  background: rgba(139, 92, 246, 0.1);
}

.size-option input[type="checkbox"] {
  display: none;
}

.size-option input[type="checkbox"]:checked + label {
  color: var(--primary);
}

.size-option input[type="checkbox"]:checked + label .size-badge {
  background: var(--primary);
  color: white;
}

.size-option label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.size-badge {
  background: rgba(255, 255, 255, 0.1);
  color: var(--gray);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.size-desc {
  font-size: 12px;
  color: var(--gray);
}

.size-presets {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.preset-btn {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 10px 15px;
  color: var(--gray);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  min-width: 120px;
}

.preset-btn:hover {
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary);
  border-color: var(--primary);
}

/* ADDITIONAL SETTINGS */
.additional-settings {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.setting-item label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  min-width: 120px;
}

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

.slider-container {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 15px;
}

.slider-container input[type="range"] {
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  outline: none;
  -webkit-appearance: none;
}

.slider-container input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--primary);
  border-radius: 50%;
  cursor: pointer;
}

.slider-value {
  min-width: 40px;
  text-align: right;
  font-size: 14px;
  color: var(--primary);
}

.color-picker {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-picker input[type="color"] {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: transparent;
}

.color-picker input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker input[type="color"]::-webkit-color-swatch {
  border: 2px solid var(--card-border);
  border-radius: var(--radius-sm);
}

.color-value {
  background: rgba(255, 255, 255, 0.05);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 14px;
  flex: 1;
}

.setting-item select {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 10px 15px;
  color: var(--light);
  font-size: 14px;
  cursor: pointer;
}

/* ICON PREVIEW */
.icon-preview-container {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius);
  padding: 20px;
  min-height: 150px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.icon-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 15px;
  width: 100%;
}

.icon-preview-item {
  text-align: center;
}

.icon-preview-canvas {
  width: 60px;
  height: 60px;
  background: white;
  border-radius: 8px;
  margin: 0 auto 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.icon-preview-canvas img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.icon-preview-label {
  font-size: 11px;
  color: var(--gray);
}

/* BUTTONS */
.btn-convert {
  width: 100%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  padding: 18px;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.btn-convert:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.3);
}

.btn-convert::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40px;
  height: 200%;
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(30deg);
  transition: left 0.5s;
}

.btn-convert:hover::after {
  left: 120%;
}

.btn-convert:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-badge {
  background: white;
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  margin-left: 10px;
}

/* DOWNLOAD SECTION */
.download-options {
  margin-bottom: 20px;
}

.download-option {
  margin-bottom: 10px;
}

.download-option input[type="radio"] {
  display: none;
}

.download-option input[type="radio"]:checked + label {
  background: rgba(139, 92, 246, 0.2);
  border-color: var(--primary);
  color: var(--primary);
}

.download-option label {
  display: flex;
  align-items: center;
  gap: 15px;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 15px;
  cursor: pointer;
  transition: var(--transition);
}

.download-option label:hover {
  background: rgba(139, 92, 246, 0.1);
}

.download-option label i {
  font-size: 24px;
  color: var(--gray);
}

.download-option input[type="radio"]:checked + label i {
  color: var(--primary);
}

.download-option label div {
  flex: 1;
}

.download-option label span {
  display: block;
  font-weight: 600;
  margin-bottom: 4px;
}

.download-option label small {
  font-size: 12px;
  color: var(--gray);
}

.btn-download {
  width: 100%;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  color: white;
  border: none;
  padding: 16px;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}

.btn-download:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.download-info {
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  margin-left: 10px;
}

.share-options {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--card-border);
}

.share-options p {
  font-size: 14px;
  color: var(--gray);
  margin-bottom: 10px;
}

.share-buttons {
  display: flex;
  gap: 10px;
}

.share-btn {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 10px;
  color: var(--gray);
  cursor: pointer;
  transition: var(--transition);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.share-btn:hover {
  transform: translateY(-2px);
}

.share-btn:nth-child(1):hover {
  background: #1da1f2;
  color: white;
  border-color: #1da1f2;
}

.share-btn:nth-child(2):hover {
  background: #1877f2;
  color: white;
  border-color: #1877f2;
}

.share-btn:nth-child(3):hover {
  background: #25d366;
  color: white;
  border-color: #25d366;
}

.share-btn:nth-child(4):hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* FEATURES SECTION */
.features-section {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 20px;
  text-align: center;
}

.features-section h2 {
  font-size: 2.5rem;
  margin-bottom: 40px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: rgba(139, 92, 246, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 24px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--gray);
  font-size: 14px;
}

/* TUTORIAL SECTION */
.tutorial-section {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 20px;
}

.tutorial-section h2 {
  font-size: 2.5rem;
  margin-bottom: 40px;
  text-align: center;
}

.tutorial-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

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

.step-number {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  margin: 0 auto 20px;
}

.step-content h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.step-content p {
  color: var(--gray);
  font-size: 14px;
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--success);
  color: white;
  padding: 15px 25px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.error {
  background: var(--danger);
}

.toast.info {
  background: var(--primary);
}

/* FOOTER */
.footer {
  background: var(--dark-light);
  border-top: 1px solid var(--card-border);
  padding: 30px 0;
  margin-top: 60px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 15px;
}

.footer-logo i {
  font-size: 24px;
  color: var(--primary);
}

.footer-logo h3 {
  font-size: 20px;
  font-weight: 700;
}

.footer-logo span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer > p {
  color: var(--gray);
  margin-bottom: 15px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--gray);
  text-decoration: none;
  transition: var(--transition);
}

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

/* RESPONSIVE */
@media (max-width: 768px) {
  .header-section {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 30px;
  }
  
  .header-stats {
    justify-content: center;
  }
  
  .main-title {
    font-size: 2.5rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .format-tabs {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .sizes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .setting-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  
  .setting-item label {
    min-width: auto;
  }
  
  .tutorial-steps {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .main-title {
    font-size: 2rem;
  }
  
  .format-tabs {
    grid-template-columns: 1fr;
  }
  
  .sizes-grid {
    grid-template-columns: 1fr;
  }
  
  .size-presets {
    flex-direction: column;
  }
  
  .preset-btn {
    min-width: auto;
  }
}