/* =========================================================================
   GB/GBC Image-to-ROM Web Converter - Styles v10
   Multi-image + Dual Preview
   ========================================================================= */

:root {
    --gb-dark: #0F380F;
    --gb-mid-dark: #306230;
    --gb-mid-light: #8BAC0F;
    --gb-light: #9BBC0F;
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-card: #1c2128;
    --border-color: #30363d;
    --border-hover: #484f58;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-green: #7ee787;
    --accent-blue: #58a6ff;
    --accent-purple: #bc8cff;
    --accent-red: #f85149;
    --accent-yellow: #d29922;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3);
    --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* =========================================================================
   Header
   ========================================================================= */
.app-header {
    background: linear-gradient(135deg, var(--gb-dark) 0%, #1a2332 50%, var(--gb-dark) 100%);
    border-bottom: 2px solid var(--gb-mid-dark);
    padding: 1rem 2rem;
    text-align: center;
    position: relative; overflow: hidden;
}
.app-header::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--gb-mid-light), var(--gb-light), var(--gb-mid-light));
}
.app-header h1 {
    font-size: 1.5rem; font-weight: 700; letter-spacing: 0.5px;
    display: flex; align-items: center; justify-content: center; gap: 0.5rem;
}
.app-header h1 .icon { font-size: 1.8rem; }
.app-header h1 .copyright { font-size: 0.7rem; font-weight: 400; color: var(--text-muted); margin-left: 0.3rem; }

/* =========================================================================
   Main Layout
   ========================================================================= */
.app-main {
    max-width: 1600px; margin: 0 auto; padding: 1.5rem;
    display: grid; grid-template-columns: 320px 1fr; gap: 1.5rem;
    min-height: calc(100vh - 80px);
}
@media (max-width: 960px) { .app-main { grid-template-columns: 1fr; } }

/* =========================================================================
   Control Panel
   ========================================================================= */
.control-panel { display: flex; flex-direction: column; gap: 1rem; }
.panel-card {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-md); padding: 1rem; box-shadow: var(--shadow-card);
}
.panel-card h3 {
    font-size: 0.85rem; font-weight: 600; color: var(--text-secondary);
    text-transform: uppercase; letter-spacing: 1px; margin-bottom: 0.75rem;
    padding-bottom: 0.5rem; border-bottom: 1px solid var(--border-color);
    display: flex; align-items: center; gap: 0.4rem;
}
.panel-card h3 .icon { font-size: 1rem; }

/* =========================================================================
   Drop Zone
   ========================================================================= */
.drop-zone {
    border: 2px dashed var(--border-color); border-radius: var(--radius-md);
    padding: 2rem 1rem; text-align: center; cursor: pointer;
    transition: all var(--transition); background: var(--bg-secondary); position: relative;
}
.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--accent-green); background: rgba(126, 231, 135, 0.05);
}
.drop-zone .drop-icon { font-size: 2.5rem; margin-bottom: 0.5rem; display: block; }
.drop-zone .drop-text { font-size: 0.9rem; color: var(--text-secondary); }
.drop-zone .drop-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.3rem; }
.drop-zone input[type="file"] { display: none; }

/* =========================================================================
   Image List
   ========================================================================= */
.image-count {
    margin-left: auto; font-size: 0.7rem; font-weight: 600;
    color: var(--accent-green); font-family: 'JetBrains Mono', monospace;
}
.image-list-scroll { max-height: 240px; overflow-y: auto; margin-bottom: 0.5rem; }
.image-list { display: flex; flex-direction: column; gap: 4px; }

.image-list-item {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.4rem 0.5rem; border-radius: var(--radius-sm);
    background: var(--bg-secondary); border: 1px solid transparent;
    cursor: pointer; transition: all var(--transition);
    font-size: 0.8rem;
}
.image-list-item:hover { border-color: var(--border-hover); background: var(--bg-tertiary); }
.image-list-item.active { border-color: var(--accent-green); background: rgba(126, 231, 135, 0.08); }

.image-list-item .item-thumb {
    width: 32px; height: 29px; border-radius: 3px; object-fit: cover;
    image-rendering: pixelated; background: #000; flex-shrink: 0;
}
.image-list-item .item-name {
    flex: 1; font-family: 'JetBrains Mono', monospace; font-size: 0.75rem;
    color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.image-list-item .item-tiles {
    font-size: 0.65rem; color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace; flex-shrink: 0;
}
.image-list-item .item-delete {
    width: 20px; height: 20px; border: none; background: none;
    color: var(--text-muted); cursor: pointer; border-radius: 3px;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.7rem; flex-shrink: 0; transition: all var(--transition);
}
.image-list-item .item-delete:hover { color: var(--accent-red); background: rgba(248, 81, 73, 0.15); }

.image-list-info {
    font-size: 0.7rem; color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    padding: 0.3rem 0; border-top: 1px solid var(--border-color);
}
.image-list-actions { display: flex; gap: 0.5rem; margin-top: 0.4rem; }

.btn-sm {
    flex: 1; padding: 0.35rem 0.5rem; font-size: 0.75rem; font-weight: 500;
    border: 1px solid var(--border-color); border-radius: var(--radius-sm);
    cursor: pointer; transition: all var(--transition); font-family: inherit;
    text-align: center; display: flex; align-items: center; justify-content: center; gap: 0.3rem;
}
.btn-add-image { background: var(--bg-tertiary); color: var(--accent-green); }
.btn-add-image:hover { background: rgba(126, 231, 135, 0.1); border-color: var(--accent-green); }
.btn-clear-all { background: var(--bg-tertiary); color: var(--accent-red); }
.btn-clear-all:hover { background: rgba(248, 81, 73, 0.1); border-color: var(--accent-red); }

/* =========================================================================
   Form Controls
   ========================================================================= */
.form-group { margin-bottom: 0.75rem; }
.form-group:last-child { margin-bottom: 0; }
.form-group label {
    display: block; font-size: 0.8rem; font-weight: 500;
    color: var(--text-secondary); margin-bottom: 0.3rem;
}
.form-group input[type="text"], .form-group select {
    width: 100%; padding: 0.45rem 0.6rem; background: var(--bg-secondary);
    border: 1px solid var(--border-color); border-radius: var(--radius-sm);
    color: var(--text-primary); font-size: 0.85rem;
    font-family: 'JetBrains Mono', monospace; transition: border-color var(--transition);
}
.form-group input[type="text"]:focus, .form-group select:focus { outline: none; border-color: var(--accent-blue); }
.form-group input[type="color"] {
    width: 36px; height: 30px; border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); cursor: pointer; background: var(--bg-secondary); padding: 2px;
}
.color-input-row { display: flex; align-items: center; gap: 0.5rem; }
.color-input-row .color-hex { font-size: 0.8rem; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }

.toggle-group { display: flex; border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--border-color); }
.toggle-btn {
    flex: 1; padding: 0.5rem 0.5rem; font-size: 0.8rem; font-weight: 600;
    text-align: center; cursor: pointer; border: none; background: var(--bg-secondary);
    color: var(--text-secondary); transition: all var(--transition); font-family: inherit;
}
.toggle-btn:not(:last-child) { border-right: 1px solid var(--border-color); }
.toggle-btn.active { background: var(--accent-green); color: var(--gb-dark); }
.toggle-btn:hover:not(.active) { background: var(--bg-tertiary); color: var(--text-primary); }

/* =========================================================================
   Preview Area - Dual Preview
   ========================================================================= */
.preview-area { display: flex; flex-direction: column; gap: 1rem; }
.preview-card {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-md); box-shadow: var(--shadow-card);
    flex: 1; display: flex; flex-direction: column;
}
.preview-header {
    display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
    padding: 0.75rem 1rem; border-bottom: 1px solid var(--border-color); gap: 0.5rem;
}
.preview-header h3 {
    font-size: 0.85rem; font-weight: 600; color: var(--text-secondary);
    text-transform: uppercase; letter-spacing: 1px;
    display: flex; align-items: center; gap: 0.4rem;
}
.preview-stats {
    display: flex; gap: 1rem; font-size: 0.75rem; color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}
.preview-stats .stat { display: flex; align-items: center; gap: 0.3rem; }
.preview-stats .stat-value { color: var(--accent-green); font-weight: 600; }
.palette-swatches { display: flex; gap: 4px; padding: 4px 1rem 8px; flex-wrap: wrap; }
.palette-row { display: flex; gap: 1px; border-radius: 3px; overflow: hidden; border: 1px solid var(--border-color); }
.palette-row .swatch { width: 12px; height: 12px; }

.preview-body {
    flex: 1; display: flex; align-items: center; justify-content: center;
    padding: 1.5rem; position: relative; min-height: 200px;
}
.preview-placeholder { text-align: center; color: var(--text-muted); }
.preview-placeholder .placeholder-icon { font-size: 3rem; margin-bottom: 0.75rem; display: block; opacity: 0.5; }
.preview-placeholder p { font-size: 0.9rem; }

/* Dual Preview Layout */
.dual-preview {
    display: flex; gap: 1.5rem; align-items: flex-start; justify-content: center;
    width: 100%;
}
.preview-pane {
    display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
    flex: 1; min-width: 0;
}
.pane-label {
    font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px;
    color: var(--text-muted); text-align: center;
}

.canvas-bezel {
    background: #2a2a3a; padding: 12px; border-radius: var(--radius-md);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.4), 0 4px 12px rgba(0,0,0,0.5);
    width: 100%;
}
.canvas-bezel .screen-label {
    text-align: center; font-size: 0.65rem; color: rgba(255,255,255,0.3);
    letter-spacing: 2px; text-transform: uppercase; margin-bottom: 6px;
}

.bezel-small canvas {
    display: block; image-rendering: pixelated; image-rendering: crisp-edges;
    width: 100%; aspect-ratio: 160 / 144;
    background: #1a1a2e; border-radius: 4px;
}

@media (max-width: 960px) {
    .dual-preview { flex-direction: column; align-items: center; }
    .preview-pane { max-width: 520px; width: 100%; }
}

/* =========================================================================
   Action Buttons & Progress
   ========================================================================= */
.action-bar {
    padding: 0.75rem 1rem; border-top: 1px solid var(--border-color);
    display: flex; gap: 0.75rem; align-items: center;
}
.btn {
    padding: 0.6rem 1.2rem; border-radius: var(--radius-sm);
    font-size: 0.85rem; font-weight: 600; cursor: pointer;
    border: 1px solid transparent; transition: all var(--transition);
    display: inline-flex; align-items: center; gap: 0.4rem; font-family: inherit;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary {
    background: linear-gradient(135deg, var(--gb-mid-light), var(--gb-light));
    color: var(--gb-dark); border-color: var(--gb-mid-dark);
}
.btn-primary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(139, 172, 15, 0.3); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border-color: var(--border-color); }
.btn-secondary:hover:not(:disabled) { background: var(--border-color); }

.progress-container { display: none; padding: 0.75rem 1rem; border-top: 1px solid var(--border-color); }
.progress-container.visible { display: block; }
.progress-bar-track { height: 6px; background: var(--bg-secondary); border-radius: 3px; overflow: hidden; margin-bottom: 0.4rem; }
.progress-bar-fill {
    height: 100%; background: linear-gradient(90deg, var(--gb-mid-light), var(--accent-green));
    border-radius: 3px; transition: width 0.3s ease; width: 0%;
}
.progress-text { font-size: 0.75rem; color: var(--text-muted); text-align: center; }

/* =========================================================================
   Toast
   ========================================================================= */
.toast {
    position: fixed; bottom: 2rem; right: 2rem; padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 500;
    z-index: 1000; transform: translateY(100px); opacity: 0;
    transition: all 0.3s ease; max-width: 400px;
}
.toast.visible { transform: translateY(0); opacity: 1; }
.toast.error { background: #3d1a1a; border: 1px solid var(--accent-red); color: #fca5a5; }
.toast.success { background: #1a3d1a; border: 1px solid var(--accent-green); color: #a5fcb5; }
.toast.info { background: #1a2a3d; border: 1px solid var(--accent-blue); color: #a5c8fc; }

/* =========================================================================
   Footer & Scrollbar
   ========================================================================= */
.app-footer { text-align: center; padding: 1rem; font-size: 0.75rem; color: var(--text-muted); border-top: 1px solid var(--border-color); }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* =========================================================================
   Crop Preview
   ========================================================================= */
.crop-hint { font-weight: 400; font-size: 0.7rem; color: var(--text-muted); }
.crop-preview-container {
    position: relative; width: 100%; height: 180px; overflow: hidden;
    border-radius: var(--radius-sm); border: 1px solid var(--border-color);
    background: #000; cursor: grab; user-select: none; -webkit-user-select: none; touch-action: none;
}
.crop-preview-container:active { cursor: grabbing; }
.crop-preview-container .crop-source-img {
    position: absolute; top: 0; left: 0; display: block; pointer-events: none; image-rendering: auto;
}
.crop-overlay { position: absolute; inset: 0; pointer-events: none; z-index: 2; }
.crop-frame {
    position: absolute; border: 2px solid var(--accent-green); border-radius: 2px;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.55), 0 0 8px rgba(126, 231, 135, 0.4);
}
.crop-position-info {
    position: absolute; bottom: 4px; right: 6px; font-size: 0.65rem;
    font-family: 'JetBrains Mono', monospace; color: rgba(255, 255, 255, 0.7);
    background: rgba(0, 0, 0, 0.6); padding: 1px 6px; border-radius: 3px;
    z-index: 3; pointer-events: none;
}
.btn-crop-reset {
    display: block; width: 100%; margin-top: 0.4rem; padding: 0.35rem 0.5rem;
    font-size: 0.75rem; font-weight: 500; color: var(--text-secondary);
    background: var(--bg-tertiary); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm); cursor: pointer; transition: all var(--transition);
    font-family: inherit; text-align: center;
}
.btn-crop-reset:hover { background: var(--border-color); color: var(--text-primary); }

.quality-actions {
    display: flex; gap: 0.4rem; margin-top: 0.6rem;
}
.quality-actions .btn-crop-reset {
    flex: 1; margin-top: 0;
}
.btn-apply-all {
    color: var(--accent-blue) !important;
    border-color: var(--accent-blue) !important;
}
.btn-apply-all:hover {
    background: rgba(88, 166, 255, 0.15) !important;
    color: var(--accent-blue) !important;
}

.per-image-label {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--accent-green);
    background: rgba(126, 231, 135, 0.1);
    padding: 0.1rem 0.5rem;
    border-radius: var(--radius-sm);
    margin-left: 0.4rem;
}

/* =========================================================================
   Quality Sliders
   ========================================================================= */
.slider-group { margin-bottom: 0.9rem; }
.slider-group label { display: flex; justify-content: space-between; align-items: center; }
.slider-value {
    font-size: 0.75rem; font-family: 'JetBrains Mono', monospace;
    color: var(--accent-green); font-weight: 600; min-width: 24px; text-align: right;
}
.quality-slider {
    -webkit-appearance: none; appearance: none; width: 100%; height: 6px;
    border-radius: 3px; background: var(--bg-secondary); border: 1px solid var(--border-color);
    outline: none; cursor: pointer; margin: 0.3rem 0 0.15rem;
}
.quality-slider::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none; width: 16px; height: 16px;
    border-radius: 50%; background: var(--accent-green); border: 2px solid var(--gb-dark);
    cursor: pointer; transition: box-shadow 0.15s ease;
}
.quality-slider::-webkit-slider-thumb:hover { box-shadow: 0 0 8px rgba(126, 231, 135, 0.5); }
.quality-slider::-moz-range-thumb {
    width: 16px; height: 16px; border-radius: 50%;
    background: var(--accent-green); border: 2px solid var(--gb-dark); cursor: pointer;
}
.slider-labels { display: flex; justify-content: space-between; font-size: 0.65rem; color: var(--text-muted); }

/* =========================================================================
   Animations
   ========================================================================= */
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
.processing .preview-body::after {
    content: ''; position: absolute; inset: 0;
    background: rgba(13, 17, 23, 0.6); border-radius: var(--radius-md);
    animation: pulse 1.5s ease-in-out infinite;
}