/* Modern CSS for DXF Nesting Optimizer */

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

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

.container {
    max-width: 1800px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px 20px;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    border-radius: 12px;
    color: white;
    box-shadow: var(--shadow-lg);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Main Content Layout */
.main-content {
    display: grid;
    grid-template-columns: 450px 1fr;
    gap: 20px;
    align-items: start;
}

@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--text-color);
}

/* Upload Section */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-color);
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--primary-color);
    background: #eff6ff;
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.drop-zone-content svg {
    color: var(--primary-color);
}

.drop-zone-content p {
    font-size: 1.1rem;
    color: var(--text-color);
}

.drop-zone-content .small {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.file-list {
    margin-top: 16px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    background: var(--bg-color);
    border-radius: 6px;
    margin-bottom: 8px;
}

.file-item-name {
    font-size: 0.95rem;
    color: var(--text-color);
}

.file-item-remove {
    color: var(--danger-color);
    cursor: pointer;
    font-weight: bold;
}

/* Configuration Section */
.config-group {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.config-group:last-child {
    border-bottom: none;
}

.config-group h3 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.input-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 6px;
}

label.info-label {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
}

label.info-label > span:first-child {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

label.slider-label {
    margin-bottom: 16px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label.slider-label > span:first-child {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 0;
    flex-wrap: nowrap;
}

label.slider-label input.slider {
    width: 100% !important;
    display: block;
    margin: 0 !important;
    padding: 0 !important;
}

.slider-label-text {
    display: flex;
    align-items: center;
    gap: 6px;
}

.slider-value-container {
    display: flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
}

input[type="number"],
select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    transition: border-color 0.2s;
    margin-top: 4px;
}

input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input[type="number"]:disabled,
select:disabled {
    background-color: #f1f5f9;
    color: #94a3b8;
    cursor: not-allowed;
    border-color: #e2e8f0;
}

/* Slider Controls */
.slider-control {
    margin-bottom: 20px;
}

.slider-control .info-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.slider-value {
    font-weight: 600;
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
    padding: 4px 12px;
    border-radius: 6px;
    min-width: 60px;
    text-align: center;
    font-size: 0.9rem;
}

/* Range Sliders */
.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--border-color);
    outline: none;
    transition: background 0.2s;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.slider:hover {
    background: #cbd5e1;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.slider::-webkit-slider-thumb:hover {
    background: var(--primary-hover);
    transform: scale(1.1);
}

.slider::-webkit-slider-thumb:active {
    transform: scale(0.95);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    transition: background 0.2s, transform 0.2s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.slider::-moz-range-thumb:hover {
    background: var(--primary-hover);
    transform: scale(1.1);
}

.slider::-moz-range-thumb:active {
    transform: scale(0.95);
}

/* Disabled slider styles */
.slider:disabled {
    background: #e2e8f0;
    cursor: not-allowed;
    opacity: 0.6;
}

.slider:disabled::-webkit-slider-thumb {
    background: #94a3b8;
    cursor: not-allowed;
}

.slider:disabled::-moz-range-thumb {
    background: #94a3b8;
    cursor: not-allowed;
}

.slider-label .slider-value {
    font-weight: 700;
    color: var(--primary-color);
    min-width: 50px;
    display: inline-block;
    text-align: right;
    font-size: 1rem;
    background: rgba(37, 99, 235, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    width: 100%;
    font-size: 1.1rem;
    padding: 16px;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
    width: 100%;
}

.btn-secondary:hover {
    background: #475569;
}

.btn-download {
    background: var(--success-color);
    color: white;
    flex: 1;
}

.btn-download:hover {
    background: #059669;
}

.btn-view {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-view:hover {
    background: var(--border-color);
}

/* Progress Section */
.progress-section {
    background: #fffbeb;
    border: 1px solid #fde68a;
}

.progress-bar {
    width: 100%;
    height: 24px;
    background: var(--bg-color);
    border-radius: 12px;
    overflow: hidden;
    margin: 16px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #3b82f6);
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Results Section */
.results-section {
    background: #f0fdf4;
    border: 1px solid #86efac;
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .results-grid {
        grid-template-columns: 1fr;
    }
}

.result-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.download-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #86efac;
}

.download-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* 3D Viewer */
.viewer-section {
    height: 900px;
    display: flex;
    flex-direction: column;
}

.viewer-3d {
    flex: 1;
    background: #1e293b;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    margin-bottom: 16px;
}

.viewer-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.1rem;
}

#viewer3D canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.viewer-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Info Tooltips */
.info-label {
    display: flex;
    align-items: center;
    gap: 6px;
    position: relative;
}

.info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    font-size: 11px;
    font-weight: bold;
    cursor: help;
    position: relative;
    flex-shrink: 0;
}

.info-icon:hover {
    background: var(--primary-hover);
}

.tooltip {
    visibility: hidden;
    position: absolute;
    z-index: 1000;
    background: var(--text-color);
    color: white;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    line-height: 1.4;
    width: 280px;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.2s, visibility 0.2s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    pointer-events: none;
}

.tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--text-color);
}

.info-icon:hover .tooltip {
    visibility: visible;
    opacity: 1;
}