:root {
  --bg-primary: #0f0f13;
  --bg-secondary: #16161d;
  --bg-tertiary: #1c1c24;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-tertiary: #6c6c7c;
  --accent-primary: #6366f1;
  --accent-secondary: #4f46e5;
  --accent-tertiary: #4338ca;
  --border: #2e2e3a;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.2s ease;
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans",
    "Helvetica Neue", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 16px;
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

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

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-tertiary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1rem;
}

nav ul li a {
  text-decoration: none;
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  font-weight: 500;
  transition: var(--transition);
  border-radius: var(--radius-md);
}

nav ul li.active a {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
}

nav ul li a:hover {
  color: var(--text-primary);
}

.user-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn {
  cursor: pointer;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition);
  border: none;
}

.btn:focus {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background-color: var(--accent-secondary);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background-color: var(--bg-tertiary);
}

.btn-text {
  background-color: transparent;
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
}

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

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  background-color: transparent;
  color: var(--text-secondary);
}

.btn-icon:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
}

.theme-toggle {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border-radius: 50%;
}

.theme-toggle:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

main {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.section {
  display: none;
  margin-bottom: 2rem;
}

.section.active {
  display: block;
}

.section-header {
  margin-bottom: 2rem;
  text-align: center;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

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

.upload-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
  transition: var(--transition);
  background-color: var(--bg-secondary);
}

.upload-area:hover {
  border-color: var(--accent-primary);
}

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

.upload-icon {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.upload-area p {
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
  font-weight: 500;
}

.upload-area span {
  display: block;
  margin: 1rem 0;
  color: var(--text-tertiary);
}

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

.option-card {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid var(--border);
}

.option-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-primary);
}

.option-icon {
  margin-bottom: 1rem;
  color: var(--accent-primary);
}

.option-card h3 {
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.option-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.edit-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.edit-preview {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  border: 1px solid var(--border);
}

.placeholder-image {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
}

.placeholder-image svg {
  margin-bottom: 1rem;
}

.placeholder-image p {
  font-size: 0.875rem;
}

.edit-tools {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tool-group {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--border);
}

.tool-group h3 {
  margin-bottom: 1rem;
  font-weight: 600;
  font-size: 1rem;
}

.tool-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.tool-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
}

.tool-btn:hover {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.tool-btn.premium {
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--accent-primary);
  border-color: rgba(99, 102, 241, 0.2);
}

.tool-btn.premium:hover {
  background-color: rgba(99, 102, 241, 0.15);
}

.convert-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.format-options h3,
.compression-options h3 {
  margin-bottom: 1rem;
  font-weight: 600;
}

.format-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.format-card {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.format-card:hover {
  border-color: var(--accent-primary);
}

.format-card.active {
  border-color: var(--accent-primary);
  background-color: rgba(99, 102, 241, 0.05);
}

.format-icon {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  background-color: rgba(99, 102, 241, 0.1);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  min-width: 50px;
  text-align: center;
}

.format-details h4 {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.format-details p {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.slider-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  background-color: var(--bg-secondary);
  padding: 1rem;
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
}

.quality-slider {
  flex: 1;
  appearance: none;
  height: 6px;
  background: linear-gradient(to right, var(--accent-primary), var(--success));
  border-radius: 10px;
  outline: none;
}

.quality-slider::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  background-color: white;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.3);
}

.size-preview {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1rem;
}

.size-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.size-reduction {
  background-color: var(--success);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.convert-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1rem;
}

.share-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.share-preview {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  border: 1px solid var(--border);
  grid-row: span 2;
}

.share-options {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.share-option {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--border);
}

.share-option h3 {
  margin-bottom: 1rem;
  font-weight: 600;
  font-size: 1rem;
}

.input-group {
  display: flex;
  width: 100%;
}

.input-group input {
  flex: 1;
  padding: 0.75rem 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
}

.input-group .btn-icon {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-left: none;
}

.expiry-settings {
  margin-top: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.expiry-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-tertiary);
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background-color: white;
  transition: .4s;
}

input:checked + .slider {
  background-color: var(--accent-primary);
}

input:checked + .slider:before {
  transform: translateX(16px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

select {
  padding: 0.5rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: var(--radius-md);
}

select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.social-buttons {
  display: flex;
  gap: 0.5rem;
}

.social-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.social-btn:hover {
  color: white;
}

.social-btn.facebook:hover {
  background-color: #1877f2;
  border-color: #1877f2;
}

.social-btn.twitter:hover {
  background-color: #1da1f2;
  border-color: #1da1f2;
}

.social-btn.linkedin:hover {
  background-color: #0a66c2;
  border-color: #0a66c2;
}

.social-btn.pinterest:hover {
  background-color: #e60023;
  border-color: #e60023;
}

.social-btn.reddit:hover {
  background-color: #ff4500;
  border-color: #ff4500;
}

.privacy-settings {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--border);
}

.privacy-settings h3 {
  margin-bottom: 1rem;
  font-weight: 600;
  font-size: 1rem;
}

.privacy-option {
  margin-bottom: 1rem;
}

.checkbox-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  cursor: pointer;
}

.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  height: 18px;
  width: 18px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: inline-block;
  position: relative;
}

.checkbox-container input:checked ~ .checkmark {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
  display: block;
}

.checkbox-container .checkmark:after {
  left: 6px;
  top: 2px;
  width: 4px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.privacy-option input[type="password"] {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

.privacy-option input[type="password"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.image-gallery {
  padding: 1.5rem 2rem;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.gallery-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}

.empty-gallery {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  color: var(--text-tertiary);
}

.empty-gallery svg {
  margin-bottom: 1rem;
}

.upload-progress-bar {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-lg);
  display: none;
  border: 1px solid var(--border);
}

.progress-track {
  height: 6px;
  background-color: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
  border-radius: 3px;
  transition: width 0.3s ease;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
}

.floating-action-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: var(--transition);
  z-index: 100;
}

.floating-action-btn:hover {
  background-color: var(--accent-secondary);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  header {
    padding: 1rem;
  }

  nav {
    display: none;
  }

  .edit-container {
    grid-template-columns: 1fr;
  }

  .share-container {
    grid-template-columns: 1fr;
  }

  .share-preview {
    grid-row: auto;
  }

  .upload-options {
    grid-template-columns: 1fr;
  }
}