:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #00C896; /* Bambu Lab Green */
    --accent-hover: #00a57c;
    --border-color: #333;
    --error-color: #d9534f;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- Header --- */
header {
    background-color: var(--bg-secondary);
    padding: 1.5rem 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

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

header .logo img {
    width: 32px;
    height: 32px;
}

header h1 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
}

header p {
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* --- Main Layout --- */
.container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    padding: 2rem;
    max-width: 1600px;
    margin: 0 auto;
}

/* --- Panels --- */
.import-panel, .results-panel {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.panel-header h2 {
    font-size: 1.5rem;
    font-weight: 500;
}

.file-info {
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 500;
}

/* --- Tabs --- */
.tabs, .view-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.tab-button, .view-tab-button {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-size: 1rem;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.tab-button.active, .view-tab-button.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.tab-content, .view-content {
    display: none;
}

.tab-content.active, .view-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Drop Zone --- */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: border-color 0.3s ease, background-color 0.3s ease;
    cursor: pointer;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--accent-color);
    background-color: rgba(0, 200, 150, 0.05);
}

.drop-zone img {
    width: 64px;
    opacity: 0.5;
    margin-bottom: 1rem;
}

.browse-btn, .analyze-btn {
    background-color: var(--accent-color);
    color: var(--bg-primary);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-top: 1rem;
}

.browse-btn:hover, .analyze-btn:hover {
    background-color: var(--accent-hover);
}

.drop-zone-info {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* --- Textarea --- */
#gcodeInput {
    width: 100%;
    height: 200px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 6px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    resize: vertical;
}

/* --- Cost Settings --- */
.cost-settings {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.cost-settings h3 {
    margin-bottom: 1rem;
    font-weight: 500;
}

.input-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.input-group label {
    color: var(--text-secondary);
}

.input-group input {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 4px;
    width: 100px;
    text-align: right;
}

/* --- Analysis Grid --- */
.analysis-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.stat-icon {
    font-size: 2rem;
}

.stat-info h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
    text-transform: uppercase;
}

.stat-info p {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-color);
}

.stat-info small {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* --- 3D Viewer --- */
#threejs-container {
    width: 100%;
    height: 500px;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-secondary);
}

.spinner {
    border: 4px solid var(--bg-secondary);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.model-controls-info {
    text-align: center;
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

.print-btn {
    background-color: var(--accent-color);
    color: var(--bg-primary);
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.print-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
    transform: scale(1.05);
}

.print-btn:disabled {
    background-color: #555;
    color: #999;
    cursor: not-allowed;
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
    }
    .analysis-grid {
        grid-template-columns: 1fr;
    }
}