@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

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

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Header */
.header {
  text-align: center;
  padding: var(--space-2xl) var(--space-md) var(--space-lg);
}

.header__logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.header__tagline {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  margin-top: var(--space-xs);
}

/* Main */
.main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md) var(--space-2xl);
}

/* Mode Selector */
.mode-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.mode-selector__btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.mode-selector__btn:hover {
  border-color: var(--color-text-secondary);
}

.mode-selector__btn--active.mode-selector__btn--lossless {
  border-color: var(--color-lossless);
  background: rgba(0, 184, 148, 0.05);
}

.mode-selector__btn--active.mode-selector__btn--smart {
  border-color: var(--color-smart);
  background: rgba(108, 92, 231, 0.05);
}

.mode-selector__icon {
  font-size: 1.75rem;
}

.mode-selector__name {
  font-weight: 600;
  font-size: var(--font-size-lg);
}

.mode-selector__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.4;
}

/* Drop Zone */
.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--color-surface);
  margin-bottom: var(--space-lg);
}

.drop-zone:hover {
  border-color: var(--color-primary);
  background: rgba(108, 92, 231, 0.02);
}

.drop-zone--active {
  border-color: var(--color-primary);
  background: rgba(108, 92, 231, 0.05);
  border-style: solid;
}

.drop-zone__icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  opacity: 0.6;
}

.drop-zone__text {
  font-size: var(--font-size-lg);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.drop-zone__hint {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.drop-zone input[type="file"] {
  display: none;
}

/* Options Panel */
.options-panel {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.options-panel__title {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.options-panel__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

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

.options-panel__label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
}

.options-panel__label input[type="checkbox"] {
  accent-color: var(--color-primary);
}

.options-panel__fields {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.options-panel__input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  outline: none;
  transition: border-color 0.2s;
}

.options-panel__input:focus {
  border-color: var(--color-primary);
}

.options-panel__select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  background: var(--color-surface);
  outline: none;
  cursor: pointer;
}

.options-panel__select:focus {
  border-color: var(--color-primary);
}

.options-panel__fields--disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* Optimize Button */
.optimize-btn {
  display: block;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: background 0.2s;
  margin-bottom: var(--space-lg);
}

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

.optimize-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Image List */
.image-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

/* Image Card */
.image-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

.image-card:hover {
  box-shadow: var(--shadow-md);
}

.image-card__thumb {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background: var(--color-bg);
  flex-shrink: 0;
}

.image-card__thumb--svg {
  padding: 8px;
  object-fit: contain;
}

.image-card__info {
  flex: 1;
  min-width: 0;
}

.image-card__name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.image-card__meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: 2px;
}

.image-card__sizes {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

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

.image-card__optimized-size {
  font-weight: 600;
  color: var(--color-success);
}

.image-card__savings {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(0, 184, 148, 0.1);
  color: var(--color-success);
}

.image-card__savings--negative {
  background: rgba(255, 107, 107, 0.1);
  color: var(--color-error);
}

.image-card__error {
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

.image-card__actions {
  flex-shrink: 0;
}

.image-card__download-btn {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  cursor: pointer;
  transition: background 0.2s;
}

.image-card__download-btn:hover {
  background: var(--color-primary-hover);
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  overflow: hidden;
  margin-top: var(--space-sm);
}

.progress-bar__fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.progress-bar__fill--indeterminate {
  width: 30%;
  animation: indeterminate 1.5s infinite ease-in-out;
}

@keyframes indeterminate {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(400%); }
}

/* Download Bar */
.download-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-surface);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.1);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 100;
}

.download-bar__summary {
  font-size: var(--font-size-base);
  font-weight: 500;
}

.download-bar__summary span {
  color: var(--color-success);
  font-weight: 700;
}

.download-bar__btn {
  padding: var(--space-sm) var(--space-xl);
  background: var(--color-success);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: background 0.2s;
}

.download-bar__btn:hover {
  background: #00a381;
}

/* Toast */
.toast-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-sm);
  color: white;
  font-size: var(--font-size-sm);
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s;
  max-width: 360px;
}

.toast--success { background: var(--color-success); }
.toast--error { background: var(--color-error); }
.toast--warning { background: var(--color-warning); color: var(--color-text); }

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

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

/* Video-specific card styles */
.image-card__thumb--video {
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(108, 92, 231, 0.05));
}

.image-card__video-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.image-card__duration-badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  background: rgba(108, 92, 231, 0.1);
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.image-card__resolution {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.image-card__progress-pct {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  margin-left: var(--space-sm);
}

/* Hidden utility */
.hidden {
  display: none !important;
}

/* Responsive */
@media (max-width: 600px) {
  .mode-selector {
    grid-template-columns: 1fr;
  }

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

  .image-card {
    flex-wrap: wrap;
  }

  .image-card__info {
    min-width: calc(100% - 72px);
  }

  .image-card__actions {
    width: 100%;
  }

  .image-card__download-btn {
    width: 100%;
  }

  .download-bar {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .download-bar__btn {
    width: 100%;
  }
}