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

:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #22c55e;
    --error: #ef4444;
    --border: #333;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

#app {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem;
}

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

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Settings */
.settings {
    margin-bottom: 1.5rem;
}

.settings h2 {
    margin-bottom: 1rem;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 0.75rem;
    align-items: start;
}

/* Setting Groups - Card Style */
.setting-group {
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 1rem;
    transition: all 0.2s ease;
}

.setting-group:not(:has(input[type="checkbox"]:checked)):hover {
    border-color: var(--accent);
}

.setting-group:has(input[type="checkbox"]:checked) {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.05);
}

.setting-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    text-align: center;
}

/* Hide checkbox visually - card itself is the toggle */
.setting-toggle input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.setting-emoji {
    font-size: 2rem;
    line-height: 1;
    filter: grayscale(0.5);
    transition: filter 0.2s, transform 0.2s;
}

.setting-group:has(input[type="checkbox"]:checked) .setting-emoji {
    filter: grayscale(0);
    transform: scale(1.1);
}

.toggle-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.2s;
}

.setting-group:has(input[type="checkbox"]:checked) .toggle-label {
    color: var(--text-primary);
}

.toggle-hint {
    font-size: 0.7rem;
    color: var(--text-secondary);
    opacity: 0.6;
    margin-top: 0.25rem;
}

.toggle-hint .hint-enable {
    display: inline;
}

.toggle-hint .hint-disable {
    display: none;
}

.setting-group:has(input[type="checkbox"]:checked) .toggle-hint {
    opacity: 0.4;
}

.setting-group:has(input[type="checkbox"]:checked) .toggle-hint .hint-enable {
    display: none;
}

.setting-group:has(input[type="checkbox"]:checked) .toggle-hint .hint-disable {
    display: inline;
}

.setting-group:has(input[type="checkbox"]:disabled) {
    opacity: 0.6;
}

.setting-group:has(input[type="checkbox"]:disabled) .setting-toggle {
    cursor: not-allowed;
}

.setting-details {
    display: none;
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--border);
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

.setting-details > * {
    width: 100%;
}

.setting-group:has(input[type="checkbox"]:checked) .setting-details {
    display: flex;
}

/* Inputs */
.setting-details input[type="text"],
.setting-details input[type="number"],
.setting-details select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.setting-details input:focus,
.setting-details select:focus {
    outline: none;
    border-color: var(--accent);
}

.setting-details select {
    cursor: pointer;
}

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

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

/* Dimensions row */
.dims-row {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.dims-row input {
    width: 100%;
}

.dims-x {
    display: none;
}

/* Radio groups */
.radio-group {
    display: flex;
    gap: 0.75rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Custom radio button */
.radio-label input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-radius: 50%;
    background: var(--bg-tertiary);
    cursor: pointer;
    position: relative;
    transition: all 0.15s ease;
}

.radio-label input[type="radio"]:hover {
    border-color: var(--accent);
}

.radio-label input[type="radio"]:checked {
    border-color: var(--accent);
}

.radio-label input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    left: 3px;
    top: 3px;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

/* Position row */
.position-row,
.color-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.position-label,
.color-label,
.quality-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Crop position grid */
.crop-position-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3px;
    width: 54px;
}

.pos-btn {
    width: 16px;
    height: 16px;
    border: 1px solid var(--border);
    background: var(--bg-tertiary);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
}

.pos-btn:hover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.2);
}

.pos-btn.active {
    background: var(--accent);
    border-color: var(--accent);
}

/* Color picker */
input[type="color"] {
    width: 32px;
    height: 24px;
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    padding: 0;
    background: none;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 2px;
}

input[type="color"]::-webkit-color-swatch {
    border-radius: 2px;
    border: none;
}

/* Quality row */
.quality-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quality-row input[type="range"] {
    flex: 1;
    min-width: 0;
    accent-color: var(--accent);
}

.quality-row input[type="range"]:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

#qualityValue {
    font-size: 0.8rem;
    color: var(--text-secondary);
    min-width: 24px;
}

/* Crop/expand inputs */
.crop-inputs,
.expand-inputs {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.crop-inputs select,
.expand-inputs select {
    width: 100%;
}

.crop-inputs input[type="text"],
.expand-inputs input[type="text"] {
    width: 100%;
}

/* Drop Zone */
.drop-zone {
    padding: 1.5rem 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
    text-align: center;
}

.drop-zone.empty {
    margin-top: 10rem;
}

.drop-zone:hover,
.drop-zone.drag-over {
    opacity: 0.7;
}

.drop-zone.drag-over {
    transform: scale(1.01);
}

.drop-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.drop-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.drop-info {
    text-align: left;
}

.drop-text {
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.supported-formats {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* Fullscreen drop overlay */
.fullscreen-drop {
    position: fixed;
    inset: 0;
    background: rgba(15, 15, 15, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.fullscreen-drop.active {
    opacity: 1;
    pointer-events: auto;
}

.fullscreen-drop-content {
    position: absolute;
    inset: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 3px dashed var(--accent);
    border-radius: 24px;
    background: var(--bg-secondary);
}

.fullscreen-drop-content .drop-icon {
    font-size: 6rem;
}

.fullscreen-drop-content .drop-text {
    font-size: 1.5rem;
}

/* Queue Section */
.queue-section {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

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

.queue-header h2 {
    margin: 0;
}

.queue-actions {
    display: flex;
    gap: 0.75rem;
}

.btn {
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

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

.queue-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.75rem;
}

.queue-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.queue-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.queue-item .remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
}

.queue-item:hover .remove-btn {
    opacity: 1;
}

.queue-item .remove-btn:hover {
    background: var(--error);
}

/* Progress Section */
.progress-section {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

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

.progress-header h2 {
    margin: 0;
}

.progress-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.progress-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.progress-item .filename {
    flex: 1;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.progress-item .status {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.progress-item .status.processing {
    color: var(--accent);
}

.progress-item .status.done {
    color: var(--success);
}

.progress-item .status.error {
    color: var(--error);
}

.progress-bar {
    width: 100px;
    height: 4px;
    background: var(--bg-primary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--accent);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s ease;
}

.progress-bar-fill.done {
    background: var(--success);
}

.status-message {
    margin-top: 1rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Results Section */
.results-section {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border);
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    font-size: 0.9rem;
}

.result-item .filename {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 1rem;
}

.result-item .sizes {
    display: flex;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.result-item .original-size {
    text-decoration: line-through;
}

.result-item .new-size {
    color: var(--success);
}

.result-item .reduction {
    color: var(--accent);
    font-weight: 500;
}

.download-info {
    text-align: center;
    padding: 1rem;
    background: rgba(34, 197, 94, 0.1);
    border-radius: 8px;
    color: var(--success);
}

.hidden {
    display: none !important;
}

/* Validation errors */
.input-error {
    border-color: var(--error) !important;
}

.validation-error {
    display: block;
    color: var(--error);
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

/* Preview Section */
.preview-section {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

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

.preview-header h2 {
    margin: 0;
}

.preview-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.preview-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

#previewIndex {
    font-size: 0.85rem;
    color: var(--text-secondary);
    min-width: 3rem;
    text-align: center;
}

.btn-small {
    padding: 0.3rem 0.6rem;
    font-size: 0.85rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
}

.btn-small:hover {
    background: var(--bg-primary);
    border-color: var(--accent);
}

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

.auto-preview-toggle {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.auto-preview-toggle input {
    cursor: pointer;
}

.preview-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.preview-wrapper {
    position: relative;
    display: inline-block;
    background: repeating-conic-gradient(#333 0% 25%, #222 0% 50%) 50% / 16px 16px;
    border-radius: 8px;
}

#previewCanvas {
    display: block;
    max-width: 100%;
    max-height: 400px;
    transition: opacity 0.2s;
}

#previewCanvas.outdated {
    opacity: 0.5;
}

.preview-label {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.75);
    color: var(--text-primary);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: monospace;
}

.preview-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

.preview-info .dims {
    color: var(--text-primary);
    font-weight: 500;
}

.preview-wrapper {
    cursor: pointer;
}

.preview-label {
    cursor: pointer;
    pointer-events: auto;
}

/* Lightbox */
.preview-lightbox {
    position: fixed;
    inset: 0;
    background: rgb(128, 128, 128);
    z-index: 2000;
    overflow: hidden;
    cursor: pointer;
    padding: 230px;
}

.lightbox-canvas {
    position: absolute;
    top: 230px;
    left: 230px;
    box-shadow: 50px 50px 78px -10px rgba(0, 0, 0, 0.4);
}

.lightbox-canvas.centered {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.lightbox-info {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.75);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    pointer-events: none;
}

/* Responsive */
@media (max-width: 600px) {
    #app {
        padding: 1rem;
    }

    header h1 {
        font-size: 1.75rem;
    }

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

    .drop-zone {
        padding: 0.75rem 1rem;
    }

    .drop-icon {
        font-size: 1.5rem;
    }
}