/* Lightroom-style Dark Theme */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-darkest: #1a1a1a;
    --bg-darker: #222222;
    --bg-dark: #2a2a2a;
    --bg-medium: #3a3a3a;
    --bg-light: #4a4a4a;
    --bg-lighter: #5a5a5a;

    --text-primary: #e0e0e0;
    --text-secondary: #999999;
    --text-muted: #666666;

    --accent: #0099ff;
    --accent-hover: #33aaff;
    --accent-dim: rgba(0, 153, 255, 0.3);

    --success: #4caf50;
    --warning: #ff9800;
    --error: #f44336;

    --border: #3a3a3a;
    --divider: #333333;

    --panel-width: 280px;
    --topbar-height: 48px;
    --bottombar-height: 60px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg-darkest);
    color: var(--text-primary);
    line-height: 1.4;
    height: 100vh;
    overflow: hidden;
    font-size: 12px;
}

.hidden {
    display: none !important;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-light);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 12px;
}

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

.progress-bar {
    width: 200px;
    height: 4px;
    background: var(--bg-light);
    border-radius: 2px;
    margin-top: 12px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    width: 0%;
    transition: width 0.1s ease;
}

/* Error Message */
.error-message {
    position: fixed;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--error);
    color: white;
    padding: 12px 20px;
    border-radius: 4px;
    z-index: 10001;
    font-size: 13px;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Upload Section */
.upload-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-darkest) 0%, #0d0d0d 100%);
}

.upload-container {
    text-align: center;
}

.drop-zone {
    width: 480px;
    max-width: 90vw;
    padding: 60px 40px;
    border: 2px dashed var(--bg-light);
    border-radius: 12px;
    background: var(--bg-darker);
    cursor: pointer;
    transition: all 0.3s ease;
}

.drop-zone:hover,
.drop-zone:focus,
.drop-zone.drag-over {
    border-color: var(--accent);
    background: rgba(0, 153, 255, 0.05);
    outline: none;
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.upload-icon {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.drop-zone h2 {
    font-size: 24px;
    font-weight: 500;
    color: var(--text-primary);
}

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

.or-text {
    color: var(--text-muted) !important;
    font-size: 12px !important;
}

.upload-btn {
    display: inline-block;
    padding: 10px 24px;
    background: var(--accent);
    color: white;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

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

.file-types {
    font-size: 11px !important;
    color: var(--text-muted) !important;
    margin-top: 8px;
}

.privacy-badge {
    margin-top: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 11px;
}

.privacy-badge svg {
    opacity: 0.5;
}

/* Editor Section */
.editor-section {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Top Bar */
.top-bar {
    height: var(--topbar-height);
    background: var(--bg-darker);
    border-bottom: 1px solid var(--divider);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    flex-shrink: 0;
}

.top-bar-left,
.top-bar-center,
.top-bar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-bar-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.app-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-left: 8px;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 2px;
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--divider);
    margin: 0 8px;
}

.icon-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.icon-btn:hover:not(:disabled) {
    background: var(--bg-medium);
    color: var(--text-primary);
}

.icon-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.zoom-level {
    font-size: 11px;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: center;
}

.primary-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

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

/* Editor Main Area */
.editor-main {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* Left Panel */
.left-panel {
    width: var(--panel-width);
    background: var(--bg-darker);
    border-right: 1px solid var(--divider);
    overflow-y: auto;
    flex-shrink: 0;
}

.panel-section {
    padding: 16px;
    border-bottom: 1px solid var(--divider);
}

.panel-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.preset-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.preset-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    background: transparent;
    border: none;
    border-radius: 4px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.15s;
    text-align: left;
}

.preset-item:hover {
    background: var(--bg-medium);
}

.preset-item.active {
    background: var(--accent-dim);
}

.preset-name {
    font-size: 12px;
}

.preset-size {
    font-size: 10px;
    color: var(--text-muted);
}

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

.ratio-btn {
    padding: 6px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-size: 10px;
    cursor: pointer;
    transition: all 0.15s;
}

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

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

.info-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.info-item {
    display: flex;
    justify-content: space-between;
}

.info-label {
    color: var(--text-muted);
    font-size: 11px;
}

.info-value {
    color: var(--text-secondary);
    font-size: 11px;
}

/* Canvas Area */
.canvas-area {
    flex: 1;
    background: var(--bg-darkest);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.canvas-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

#main-canvas {
    max-width: 100%;
    max-height: calc(100vh - var(--topbar-height) - var(--bottombar-height) - 40px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

/* Crop Overlay */
.crop-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.crop-box {
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.6);
    cursor: move;
    pointer-events: all;
}

.crop-grid {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to right, rgba(255,255,255,0.2) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.2) 1px, transparent 1px);
    background-size: 33.333% 33.333%;
}

.crop-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    background: white;
    border-radius: 2px;
    pointer-events: all;
}

.crop-handle.nw { top: -6px; left: -6px; cursor: nw-resize; }
.crop-handle.ne { top: -6px; right: -6px; cursor: ne-resize; }
.crop-handle.sw { bottom: -6px; left: -6px; cursor: sw-resize; }
.crop-handle.se { bottom: -6px; right: -6px; cursor: se-resize; }
.crop-handle.n { top: -6px; left: 50%; transform: translateX(-50%); cursor: n-resize; }
.crop-handle.s { bottom: -6px; left: 50%; transform: translateX(-50%); cursor: s-resize; }
.crop-handle.e { right: -6px; top: 50%; transform: translateY(-50%); cursor: e-resize; }
.crop-handle.w { left: -6px; top: 50%; transform: translateY(-50%); cursor: w-resize; }

/* Right Panel */
.right-panel {
    width: var(--panel-width);
    background: var(--bg-darker);
    border-left: 1px solid var(--divider);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.panel-tabs {
    display: flex;
    border-bottom: 1px solid var(--divider);
    flex-shrink: 0;
}

.panel-tab {
    flex: 1;
    padding: 10px 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: all 0.15s;
    border-bottom: 2px solid transparent;
}

.panel-tab:hover {
    color: var(--text-secondary);
}

.panel-tab.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent);
}

.tab-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: none;
}

.tab-content.active {
    display: block;
}

.adjustment-group {
    margin-bottom: 16px;
}

.group-title {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.slider-row {
    display: grid;
    grid-template-columns: 70px 1fr 30px;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.slider-row label {
    font-size: 11px;
    color: var(--text-secondary);
}

.slider-row input[type="range"] {
    width: 100%;
    height: 3px;
    -webkit-appearance: none;
    background: var(--bg-light);
    border-radius: 2px;
    cursor: pointer;
}

.slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--text-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.1s;
}

.slider-row input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider-row input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--text-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.slider-value {
    font-size: 10px;
    color: var(--text-muted);
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.reset-btn {
    width: 100%;
    padding: 8px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.15s;
    margin-top: 8px;
}

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

/* Effect Presets Grid */
.effect-presets-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
}

.effect-preset-btn {
    padding: 8px 6px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 10px;
    cursor: pointer;
    transition: all 0.15s;
}

.effect-preset-btn:hover {
    background: var(--bg-medium);
    color: var(--text-primary);
    border-color: var(--accent);
}

.effect-preset-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* Tone Curve */
.curve-container {
    background: var(--bg-dark);
    border-radius: 4px;
    padding: 8px;
    margin-bottom: 8px;
}

#curve-canvas {
    width: 100%;
    height: auto;
    display: block;
}

.curve-presets {
    display: flex;
    gap: 4px;
}

.curve-preset {
    flex: 1;
    padding: 6px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-size: 10px;
    cursor: pointer;
    transition: all 0.15s;
}

.curve-preset:hover {
    background: var(--bg-medium);
}

/* HSL Controls */
.hsl-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 12px;
}

.hsl-tab {
    flex: 1;
    padding: 6px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text-secondary);
    font-size: 10px;
    cursor: pointer;
    transition: all 0.15s;
}

.hsl-tab:hover {
    background: var(--bg-medium);
}

.hsl-tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.hsl-sliders {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* Split Toning */
.split-tone-row {
    display: grid;
    grid-template-columns: 70px 24px 1fr;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.split-tone-row label {
    font-size: 11px;
    color: var(--text-secondary);
}

.split-tone-row input[type="color"] {
    width: 24px;
    height: 24px;
    padding: 0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.split-tone-row input[type="range"] {
    width: 100%;
    height: 3px;
    -webkit-appearance: none;
    background: var(--bg-light);
    border-radius: 2px;
}

/* Export Tab */
.export-row {
    display: grid;
    grid-template-columns: 70px 1fr;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.export-row label {
    font-size: 11px;
    color: var(--text-secondary);
}

.export-row select,
.export-row input[type="number"] {
    width: 100%;
    padding: 6px 8px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 11px;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.checkbox-row input[type="checkbox"] {
    width: 14px;
    height: 14px;
}

.checkbox-row label {
    font-size: 11px;
    color: var(--text-secondary);
}

.resize-options {
    padding-left: 22px;
}

.export-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background: var(--accent);
    border: none;
    border-radius: 4px;
    color: white;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 12px;
}

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

/* Bottom Bar */
.bottom-bar {
    height: var(--bottombar-height);
    background: var(--bg-darker);
    border-top: 1px solid var(--divider);
    padding: 8px 16px;
    flex-shrink: 0;
}

.filmstrip {
    height: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-lighter);
}

/* Responsive */
@media (max-width: 1200px) {
    :root {
        --panel-width: 240px;
    }
}

@media (max-width: 900px) {
    .left-panel {
        display: none;
    }

    .top-bar-center {
        position: static;
        transform: none;
    }
}

@media (max-width: 768px) {
    :root {
        --panel-width: 100%;
    }

    .editor-main {
        flex-direction: column;
    }

    .right-panel {
        border-left: none;
        border-top: 1px solid var(--divider);
        max-height: 40vh;
    }

    .canvas-area {
        min-height: 40vh;
    }

    .top-bar-center {
        display: none;
    }

    .bottom-bar {
        display: none;
    }
}

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

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