/**
 * 2D Rigging Tool - Stylesheet
 * Ver.0.016 20260119-18:59
 */

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

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f0f1a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-primary: #4a9eff;
    --accent-secondary: #ff6b6b;
    --accent-success: #4ade80;
    --border-color: #2a2a4a;
    --panel-bg: #1e1e3a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

.app-container {
    display: grid;
    grid-template-rows: auto auto auto auto 1fr auto;
    grid-template-columns: 1fr 250px;
    height: 100vh;
    gap: 0;
}

/* Header */
.header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.header h1 {
    font-size: 14px;
    font-weight: 600;
}

.header .version {
    font-size: 10px;
    color: var(--text-secondary);
}

.header .back-link {
    margin-left: auto;
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 11px;
}

.header .back-link:hover {
    text-decoration: underline;
}

/* Toolbar Tabs */
.toolbar-tabs {
    grid-column: 1 / -1;
    display: flex;
    gap: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 4px;
}

.tab-btn {
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 500;
    border: none;
    border-bottom: 2px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

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

/* Toolbar */
.toolbar {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

/* Tab Content */
.tab-content {
    display: none;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

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

.tool-group {
    display: flex;
    align-items: center;
    gap: 4px;
}

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

/* Buttons */
.btn {
    padding: 4px 8px;
    font-size: 11px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn:hover:not(:disabled) {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

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

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

.mode-btn {
    min-width: 60px;
}

/* File Input */
.file-input-label {
    display: inline-block;
    cursor: pointer;
}

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

/* Select */
select {
    padding: 6px 10px;
    font-size: 13px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
}

select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* Dual Canvas Layout */
.dual-canvas-layout {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: var(--bg-tertiary);
    min-height: 0;  /* Allow flex children to shrink */
}

.canvas-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.pane-header {
    padding: 4px 8px;
    background: var(--bg-secondary);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

/* Canvas Container */
.canvas-container {
    flex: 1;
    position: relative;
    background: var(--bg-tertiary);
    overflow: hidden;
    /* Checkerboard pattern for transparency */
    background-image:
        linear-gradient(45deg, #252540 25%, transparent 25%),
        linear-gradient(-45deg, #252540 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #252540 75%),
        linear-gradient(-45deg, transparent 75%, #252540 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

#main-canvas,
#webgl-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.canvas-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    pointer-events: none;
}

.canvas-overlay p {
    font-size: 18px;
    color: var(--text-secondary);
    padding: 20px 40px;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
}

.canvas-overlay.hidden {
    display: none;
}

/* Status Bar */
.status-bar {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 4px 16px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-secondary);
}

#status-text {
    flex: 1;
}

/* Side Panel */
.side-panel {
    background: var(--panel-bg);
    border-left: 1px solid var(--border-color);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.panel-section {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.panel-section h3 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.placeholder {
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
}

/* Bone Tree */
.bone-tree {
    font-size: 13px;
}

.bone-tree-item {
    padding: 4px 8px;
    cursor: pointer;
    border-radius: 3px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.bone-tree-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.bone-tree-item.selected {
    background: var(--accent-primary);
}

.bone-tree-item .bone-icon {
    width: 12px;
    height: 12px;
    background: var(--accent-secondary);
    border-radius: 50%;
}

.bone-tree-children {
    padding-left: 16px;
}

/* Properties Panel */
.properties {
    font-size: 13px;
}

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

.property-row label {
    width: 60px;
    color: var(--text-secondary);
}

.property-row input {
    flex: 1;
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 12px;
}

.property-row input[type="range"] {
    padding: 0;
    height: 20px;
    background: transparent;
    border: none;
}

.property-row span {
    width: 30px;
    text-align: right;
    font-size: 11px;
    color: var(--text-secondary);
}

/* Checkbox Labels */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

/* Mesh Info */
.mesh-info {
    font-size: 12px;
    margin-bottom: 8px;
}

.mesh-info .stat {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
}

.mesh-info .stat-label {
    color: var(--text-secondary);
}

.mesh-info .stat-value {
    color: var(--accent-success);
    font-weight: 500;
}

.mesh-options {
    margin-top: 8px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto auto auto 1fr auto;
        height: 100vh;
        overflow: hidden;
    }

    .toolbar-tabs {
        padding: 0 4px;
    }

    .tab-btn {
        padding: 6px 12px;
        font-size: 12px;
    }

    .side-panel {
        display: none;
    }

    .toolbar {
        gap: 8px;
        padding: 8px;
    }

    .tool-group {
        flex-wrap: wrap;
    }

    .mode-label {
        display: none;
    }

    .dual-canvas-layout {
        flex-direction: column;
        flex: 1;
        min-height: 0;
        overflow: hidden;
    }

    .canvas-pane {
        flex: 1;
        min-height: 0;
        display: flex;
        flex-direction: column;
    }

    .canvas-container {
        flex: 1;
        min-height: 0;
        aspect-ratio: 1 / 1;
        width: 100%;
        max-width: 100%;
    }
}

/* Touch-friendly buttons on mobile */
@media (pointer: coarse) {
    .btn {
        padding: 10px 16px;
        font-size: 14px;
    }

    select {
        padding: 10px 12px;
        font-size: 14px;
    }
}

/* Quality Improvement Options */
.quality-options {
    margin-top: 8px;
    padding: 6px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

.quality-options summary {
    cursor: pointer;
    font-size: 11px;
    color: var(--text-secondary);
    padding: 2px 0;
}

.quality-options summary:hover {
    color: var(--text-primary);
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 0;
    font-size: 11px;
}

.checkbox-row.sub-option {
    padding-left: 16px;
}

.checkbox-row input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: var(--accent-primary);
}

.checkbox-row label {
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-row label:hover {
    color: var(--text-primary);
}

.small-button {
    margin-top: 8px;
    padding: 4px 8px;
    font-size: 10px;
    background: var(--bg-secondary);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
    border-radius: 3px;
    cursor: pointer;
    width: 100%;
}

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

/* Mesh Generation Controls */
.mesh-gen-controls {
    margin-bottom: 8px;
}

.mesh-gen-btn {
    width: 100%;
    margin-top: 8px;
    padding: 8px;
    font-weight: 600;
}

/* Mesh Help Text */
.mesh-help-text {
    font-size: 10px;
    color: var(--text-secondary);
    padding: 4px 8px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

/* Help Popup */
.help-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.help-popup-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    color: var(--text-primary);
}

.help-popup-content h2 {
    color: var(--accent-primary);
    font-size: 16px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.help-section {
    margin-bottom: 16px;
}

.help-section h3 {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.help-section p {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.help-section strong {
    color: var(--accent-success);
}

.help-close-btn {
    display: block;
    width: 100%;
    padding: 12px;
    margin-top: 16px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}

.help-close-btn:hover {
    background: var(--accent-secondary);
}