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

:root {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d27;
    --bg-panel: #222633;
    --border: #2e3345;
    --text-primary: #e8eaf0;
    --text-secondary: #8b90a5;
    --accent: #6c5ce7;
    --accent-hover: #7d6ff0;
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #e17055;
}

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

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
header {
    padding: 12px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header h1 {
    font-size: 20px;
    font-weight: 700;
}

header h1 span {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-secondary);
    margin-left: 12px;
}

.badges {
    display: flex;
    gap: 8px;
}

.badge {
    padding: 4px 10px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 11px;
    color: var(--text-secondary);
}

/* Main Layout */
main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
#sidebar {
    width: 340px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 16px;
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    margin-bottom: 16px;
}

.panel h2 {
    font-size: 14px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

/* Steps */
.steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.step {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 13px;
}

.step.active {
    background: rgba(108, 92, 231, 0.15);
    color: var(--accent);
}

.step.done {
    color: var(--success);
}

.step-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
}

.step.active .step-num {
    background: var(--accent);
    color: white;
}

/* Upload */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: 10px;
    padding: 30px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s;
    position: relative;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--accent);
}

.upload-area input[type="file"] {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-icon {
    font-size: 36px;
    margin-bottom: 8px;
}

.upload-text {
    font-size: 13px;
    color: var(--text-secondary);
}

.upload-link {
    color: var(--accent);
    cursor: pointer;
    text-decoration: underline;
}

.upload-hint {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.file-list {
    margin-top: 12px;
}

.file-item {
    padding: 8px 12px;
    background: var(--bg-primary);
    border-radius: 6px;
    margin-bottom: 6px;
    font-size: 12px;
    display: flex;
    justify-content: space-between;
}

/* Pose */
.pose-result {
    padding: 10px;
    background: var(--bg-primary);
    border-radius: 6px;
    font-size: 12px;
    line-height: 1.8;
}

.pose-ok { color: var(--success); }
.pose-warn { color: var(--warning); }

.axis-select {
    margin-top: 12px;
    font-size: 12px;
}

.axis-select select {
    width: 100%;
    margin-top: 6px;
    padding: 6px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
}

/* Params */
.param-group {
    margin-bottom: 14px;
}

.param-group label {
    display: block;
    font-size: 12px;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.param-group input[type="range"] {
    width: 100%;
}

/* Buttons */
.btn-primary, .btn-success {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 8px;
    transition: opacity 0.2s;
}

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

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

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

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

/* Progress */
.progress {
    margin-top: 12px;
}

.progress-bar {
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.3s;
}

.progress-text {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
    display: block;
}

.export-hint {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 8px;
    line-height: 1.5;
}

/* Viewport */
#viewport {
    flex: 1;
    position: relative;
    background: var(--bg-primary);
}

#canvasContainer {
    width: 100%;
    height: 100%;
}

.viewport-toolbar {
    position: absolute;
    top: 16px;
    left: 16px;
    display: flex;
    gap: 8px;
    z-index: 10;
}

.tool-btn {
    padding: 6px 14px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
}

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

.model-info {
    position: absolute;
    bottom: 16px;
    left: 16px;
    background: rgba(0,0,0,0.7);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Footer */
footer {
    padding: 8px 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    font-size: 11px;
    color: var(--text-secondary);
    text-align: center;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}