/* LASER Divider Generator - Professional Blue Theme */
/* ================================================
   Theme: Corporate/Professional with blue accents
   Clean design, subtle shadows, business-ready
   ================================================ */

:root {
    /* Primary blue palette */
    --neon-cyan: #2563eb;
    --neon-green: #16a34a;
    --neon-magenta: #7c3aed;
    --neon-yellow: #d97706;
    --neon-orange: #ea580c;
    --neon-red: #dc2626;

    /* Functional colors */
    --primary-color: #2563eb;
    --secondary-color: #16a34a;
    --accent-color: #7c3aed;
    --warning-color: #d97706;
    --error-color: #dc2626;
    --success-color: #16a34a;

    /* Background colors - Light theme */
    --bg-dark: #f8fafc;
    --bg-panel: #ffffff;
    --bg-card: #f1f5f9;
    --bg-input: #ffffff;
    --bg-hover: #e2e8f0;
    --bg-primary: #1e293b;

    /* Grid colors - subtle */
    --grid-color: rgba(37, 99, 235, 0.03);
    --grid-accent: rgba(37, 99, 235, 0.06);

    /* Text colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    /* Border colors */
    --border-color: #e2e8f0;
    --border-glow: rgba(37, 99, 235, 0.2);

    /* Shadows - subtle and professional */
    --glow-cyan: 0 1px 3px rgba(37, 99, 235, 0.1), 0 1px 2px rgba(37, 99, 235, 0.06);
    --glow-green: 0 1px 3px rgba(22, 163, 74, 0.1), 0 1px 2px rgba(22, 163, 74, 0.06);
    --glow-magenta: 0 1px 3px rgba(124, 58, 237, 0.1), 0 1px 2px rgba(124, 58, 237, 0.06);
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px 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);

    /* Typography */
    --font-mono: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-system: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 14px;
}

body {
    font-family: var(--font-system);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* ========================================
   LAYOUT STRUCTURE
   ======================================== */

.container {
    max-width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Header Bar */
.header-bar {
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    box-shadow: var(--shadow-card);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
}

.logo-text {
    font-family: var(--font-system);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.logo-text span {
    color: #2563eb;
}

.header-status {
    display: flex;
    align-items: center;
    gap: 20px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #16a34a;
}

/* Main Content Grid */
.main-content {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 0;
    flex: 1;
    overflow: hidden;
}

/* ========================================
   PANELS
   ======================================== */

.panel {
    background: var(--bg-panel);
    overflow-y: auto;
    max-height: 100%;
    position: relative;
}

.parameters-panel {
    border-right: 1px solid var(--border-color);
    padding: 0;
}

.preview-panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-dark);
    padding: 20px;
}

/* Panel Header */
.panel-header {
    background: var(--bg-panel);
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.panel-header h2 {
    font-family: var(--font-system);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0;
}

.panel-header .icon {
    font-size: 1rem;
}

/* Panel visible header */
.panel h2 {
    font-family: var(--font-system);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 16px 20px;
    margin: 0;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

/* ========================================
   MODE TABS - Technical Style
   ======================================== */

.mode-tabs {
    display: flex;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 0;
    gap: 0;
}

.mode-tab {
    flex: 1;
    padding: 14px 10px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-family: var(--font-system);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.mode-tab:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.mode-tab.active {
    color: #2563eb;
    border-bottom-color: #2563eb;
    background: rgba(37, 99, 235, 0.05);
}

/* ========================================
   FORM SECTIONS
   ======================================== */

.mode-form {
    display: none;
    padding: 15px;
}

.mode-form.active,
.mode-form[data-mode="manual"] {
    display: block;
}

.form-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 12px;
    overflow: hidden;
}

.form-section.compact {
    margin-bottom: 10px;
}

.form-section h3 {
    font-family: var(--font-system);
    font-size: 0.75rem;
    font-weight: 600;
    color: #1e40af;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 10px 14px;
    margin: 0;
    background: #eff6ff;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-section-content {
    padding: 12px;
}

/* ========================================
   FORM CONTROLS
   ======================================== */

.form-group {
    margin-bottom: 12px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.form-group-row .form-group {
    margin-bottom: 8px;
}

/* Labels */
.form-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    font-family: var(--font-system);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Value Display */
.value-display {
    font-family: var(--font-system);
    font-size: 0.8rem;
    font-weight: 600;
    color: #2563eb;
    background: #eff6ff;
    padding: 2px 10px;
    border-radius: 4px;
    min-width: 45px;
    text-align: center;
}

/* Range Sliders */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: #e2e8f0;
    border: none;
    border-radius: 3px;
    outline: none;
    margin-bottom: 6px;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: #2563eb;
    border: 2px solid white;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: all 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: #1d4ed8;
    transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: #2563eb;
    border: 2px solid white;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

input[type="range"]:focus {
    outline: none;
}

/* Number Inputs */
.number-input,
input[type="number"] {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-system);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.number-input:focus,
input[type="number"]:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    opacity: 0.5;
}

/* Select Inputs */
.select-input,
select {
    width: calc(100% - 45px);
    padding: 8px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    cursor: pointer;
    display: inline-block;
}

.select-input:focus,
select:focus {
    outline: none;
    border-color: var(--neon-cyan);
}

/* Text Inputs */
input[type="text"],
textarea {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    transition: all 0.2s;
}

input[type="text"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--neon-cyan);
    box-shadow: 0 0 0 1px rgba(0, 240, 255, 0.2);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

/* Compact form adjustments */
.form-section.compact .form-group-row {
    gap: 8px;
}

.form-section.compact label {
    font-size: 0.65rem;
}

.form-section.compact .value-display {
    font-size: 0.7rem;
    padding: 2px 6px;
    min-width: 40px;
}

.form-section.compact input[type="range"] {
    margin-bottom: 4px;
}

.form-section.compact .number-input,
.form-section.compact input[type="number"] {
    padding: 6px 8px;
    font-size: 0.8rem;
}

/* ========================================
   BUTTONS - Technical Style
   ======================================== */

.button-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 8px;
    margin-top: 10px;
}

.btn {
    padding: 10px 18px;
    border: none;
    border-radius: 6px;
    font-family: var(--font-system);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* Primary Button - Blue */
.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    transform: translateY(-1px);
}

/* Secondary Button - Outline */
.btn-secondary {
    background: white;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: #2563eb;
    color: #2563eb;
}

/* Accent Button - Purple */
.btn-accent {
    background: #7c3aed;
    color: white;
}

.btn-accent:hover {
    background: #6d28d9;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
    transform: translateY(-1px);
}

/* Small Button */
.btn-small {
    padding: 8px 14px;
    font-size: 0.8rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all 0.2s;
    margin-left: 5px;
    vertical-align: middle;
}

.btn-small:hover {
    border-color: #2563eb;
    color: #2563eb;
}

.btn-small.btn-primary {
    background: #2563eb;
    border-color: #2563eb;
    color: white;
}

.btn-small.btn-primary:hover {
    background: #1d4ed8;
}

.btn-small.btn-secondary {
    background: white;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-small.btn-secondary:hover {
    border-color: #2563eb;
    color: #2563eb;
}

.btn-small.btn-danger {
    background: white;
    border-color: #dc2626;
    color: #dc2626;
}

.btn-small.btn-danger:hover {
    background: #fef2f2;
}

/* ========================================
   PREVIEW PANEL
   ======================================== */

.preview-panel h2 {
    background: transparent;
    border: none;
    padding: 0 0 10px 0;
    position: relative;
}

.preview-container {
    flex: 1;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    height: calc(100vh - 280px);
    position: relative;
    overflow: auto;
    box-shadow: var(--shadow-card);
}

.preview-container::before {
    content: 'APERCU';
    position: absolute;
    top: 12px;
    left: 16px;
    font-family: var(--font-system);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

#svg-display {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

#svg-display svg {
    max-width: 100%;
    max-height: 100%;
}

/* Dual preview container for Box+Glasses mode */
.preview-dual-container {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    width: 100%;
    height: 100%;
    padding: 10px;
}

.preview-item {
    flex: 1;
    min-width: 200px;
    max-width: 48%;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.preview-item h4 {
    font-family: var(--font-system);
    font-size: 0.85rem;
    font-weight: 600;
    color: #1e40af;
    margin-bottom: 10px;
}

.preview-item p {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

.preview-svg-wrapper {
    width: 100%;
    max-height: 300px;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-svg-wrapper svg {
    max-width: 100%;
    max-height: 280px;
    height: auto;
}

/* Override SVG stroke color for neon effect */
#svg-display svg path,
#svg-display svg line,
#svg-display svg polyline,
#svg-display svg polygon,
#svg-display svg rect,
#svg-display svg circle {
    stroke: var(--neon-cyan) !important;
}

.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.loading::before {
    content: '';
    width: 30px;
    height: 30px;
    border: 2px solid var(--border-color);
    border-top-color: var(--neon-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========================================
   INFO BOX - Technical Readout
   ======================================== */

.info-box {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    position: relative;
    box-shadow: var(--shadow-card);
}

.info-box h3 {
    font-family: var(--font-system);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.info-item {
    display: flex;
    flex-direction: column;
    padding: 8px 10px;
    background: var(--bg-card);
    border-radius: 6px;
}

.info-label {
    font-family: var(--font-system);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.info-value {
    font-family: var(--font-system);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.info-value.status {
    color: #16a34a;
}

/* Small info boxes */
.info-box-small {
    background: #eff6ff;
    border: 1px solid #dbeafe;
    padding: 10px 12px;
    border-radius: 6px;
    font-family: var(--font-system);
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

.info-message-small {
    background: rgba(0, 240, 255, 0.05);
    border-left: 2px solid var(--neon-cyan);
    padding: 6px 10px;
    margin: 8px 0;
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ========================================
   RESULTS BOX (left panel - legacy)
   ======================================== */

.results-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 12px;
    margin-top: 12px;
    max-height: 300px;
    overflow-y: auto;
}

/* ========================================
   RESULTS PANEL (right panel - Box+Glasses)
   ======================================== */

.results-panel {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    margin-top: 15px;
    position: relative;
    box-shadow: var(--shadow-card);
}

.results-panel h4 {
    font-family: var(--font-system);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.results-panel .results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
}

.results-panel .result-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    position: relative;
}

.results-panel .result-card.highlight {
    border-color: #2563eb;
    background: #eff6ff;
}

.results-panel .result-card h5 {
    font-family: var(--font-system);
    font-size: 0.8rem;
    font-weight: 600;
    color: #1e40af;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.results-panel .result-card h5 .icon {
    font-size: 1rem;
}

.results-panel .result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid rgba(48, 54, 61, 0.5);
}

.results-panel .result-row:last-child {
    border-bottom: none;
}

.results-panel .result-row.total {
    background: #eff6ff;
    margin: 8px -14px -14px;
    padding: 12px 14px;
    border-radius: 0 0 8px 8px;
    border-bottom: none;
}

.results-panel .result-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.results-panel .result-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.results-panel .result-value.highlight {
    color: var(--neon-green);
    text-shadow: 0 0 5px rgba(57, 255, 20, 0.5);
    font-size: 1rem;
}

.results-panel .result-detail {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.results-panel .results-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

/* Layout visualization schema */
.layout-visualization {
    background: var(--bg-card);
    border-radius: 8px;
    padding: 14px;
    margin-top: 15px;
    border: 1px solid var(--border-color);
}

.layout-visualization h5 {
    font-family: var(--font-system);
    font-size: 0.8rem;
    font-weight: 600;
    color: #1e40af;
    margin-bottom: 12px;
}

.layout-schema {
    font-family: var(--font-system);
    overflow-x: auto;
    padding: 8px 0;
}

.schema-line {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    font-size: 1rem;
    margin-bottom: 4px;
}

.schema-glass {
    background: #2563eb;
    color: white;
    padding: 6px 14px;
    border-radius: 50%;
    font-weight: 600;
    min-width: 30px;
    text-align: center;
}

.schema-divider {
    background: #d97706;
    color: white;
    padding: 6px 6px;
    font-weight: 600;
    min-width: 8px;
    text-align: center;
    border-radius: 2px;
}

.schema-gap {
    color: var(--text-muted);
    padding: 0 4px;
    font-size: 0.8rem;
}

.schema-dimensions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.dim-glass {
    min-width: 30px;
    padding: 0 14px;
    text-align: center;
    color: #2563eb;
}

.dim-divider {
    min-width: 8px;
    padding: 0 6px;
    text-align: center;
    color: #d97706;
}

.dim-gap {
    padding: 0 4px;
    color: #7c3aed;
}

.layout-legend {
    display: flex;
    gap: 15px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.layout-legend span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.results-box h4 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--neon-yellow);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.result-section {
    background: var(--bg-input);
    border-radius: 2px;
    padding: 10px;
    margin-bottom: 10px;
    border-left: 2px solid var(--neon-cyan);
}

.result-section h5 {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--neon-cyan);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.result-item {
    padding: 6px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-item:last-child {
    border-bottom: none;
}

.result-item.highlight {
    background: rgba(255, 208, 0, 0.1);
    border-left: 3px solid var(--neon-yellow);
    padding: 8px;
    margin: 5px 0;
    border-radius: 2px;
    border-bottom: none;
}

.result-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.result-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--neon-cyan);
}

.result-detail {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 3px;
    padding-left: 10px;
}

.result-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

/* ========================================
   MESSAGES
   ======================================== */

.info-message {
    background: rgba(0, 240, 255, 0.1);
    border-left: 3px solid var(--neon-cyan);
    padding: 10px 12px;
    margin: 10px 0;
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-primary);
}

.success-message {
    background: rgba(57, 255, 20, 0.1);
    border-left: 3px solid var(--neon-green);
    padding: 10px 12px;
    margin: 10px 0;
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--neon-green);
}

.error-message {
    background: rgba(255, 0, 64, 0.1);
    border-left: 3px solid var(--neon-red);
    padding: 10px 12px;
    margin: 10px 0;
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--neon-red);
}

/* ========================================
   MODALS - Technical Style
   ======================================== */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(8px);
}

.modal-content {
    background: var(--bg-panel);
    margin: 5% auto;
    padding: 0;
    border-radius: 4px;
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow-card), 0 0 40px rgba(0, 240, 255, 0.2);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta), var(--neon-cyan));
}

.modal-content h2 {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--neon-cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 20px 25px;
    margin: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.modal-content form,
.modal-content > div:not(.modal-3d):not(#preview-3d-container) {
    padding: 20px 25px;
}

.close {
    position: absolute;
    right: 15px;
    top: 15px;
    color: var(--text-secondary);
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    z-index: 10;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
}

.close:hover {
    color: var(--neon-red);
    background: rgba(255, 0, 64, 0.1);
}

/* Pieces/Config List */
#pieces-list,
#box-configs-list {
    max-height: 400px;
    overflow-y: auto;
    padding: 15px 25px;
}

.piece-item,
.config-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 12px 15px;
    margin-bottom: 10px;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.piece-item::before,
.config-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--border-color);
    transition: all 0.2s;
}

.piece-item:hover,
.config-item:hover {
    border-color: var(--neon-cyan);
    transform: translateX(5px);
}

.piece-item:hover::before,
.config-item:hover::before {
    background: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-cyan);
}

.piece-item h4,
.config-item h4 {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.piece-item p,
.config-item p {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ========================================
   3D PREVIEW MODAL
   ======================================== */

.modal-3d {
    max-width: 95vw;
    width: 1400px;
    max-height: 90vh;
}

.modal-3d h2 {
    padding: 15px 20px;
}

#preview-3d-container {
    background: #0a0a15;
    margin: 0;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

#preview-3d-container::before {
    content: '3D VIEWPORT';
    position: absolute;
    top: 10px;
    left: 15px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    z-index: 10;
}

#preview-3d-canvas {
    width: 100%;
    height: 550px;
    display: block;
}

.preview-3d-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
}

.preview-3d-controls .control-group {
    display: flex;
    gap: 15px;
    align-items: center;
}

.preview-3d-controls label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
}

.preview-3d-controls label:hover {
    color: var(--text-primary);
}

.preview-3d-controls input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--neon-cyan);
}

.preview-3d-controls .hint {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
    flex: 1;
    text-align: right;
}

/* ========================================
   SCROLLBAR STYLING
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
    border-left: 1px solid var(--border-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 0;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

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

    .parameters-panel {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        order: 2;
    }

    .preview-panel {
        order: 1;
    }

    .preview-container {
        height: 300px;
        min-height: 250px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 13px;
    }

    .header-bar {
        padding: 8px 12px;
    }

    .logo-text {
        font-size: 1rem;
    }

    .header-status {
        display: none;
    }

    .mode-tab {
        padding: 10px 8px;
        font-size: 0.65rem;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .button-group {
        grid-template-columns: 1fr;
    }

    .form-group-row {
        grid-template-columns: 1fr;
    }

    .modal-content {
        margin: 2% auto;
        width: 95%;
    }

    .modal-3d {
        width: 98%;
    }

    #preview-3d-canvas {
        height: 350px;
    }

    .preview-3d-controls {
        flex-direction: column;
        gap: 10px;
    }

    .preview-3d-controls .hint {
        text-align: center;
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes scanline {
    0% { top: 0; }
    100% { top: 100%; }
}

/* Scanline effect for panels (optional, can be enabled) */
.panel.with-scanline::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.1), transparent);
    animation: scanline 8s linear infinite;
    pointer-events: none;
}

/* Glow animation for active elements */
@keyframes glow-pulse {
    0%, 100% {
        box-shadow: 0 0 5px rgba(0, 240, 255, 0.5);
    }
    50% {
        box-shadow: 0 0 15px rgba(0, 240, 255, 0.8), 0 0 25px rgba(0, 240, 255, 0.4);
    }
}

.glow-active {
    animation: glow-pulse 2s ease-in-out infinite;
}