/* ============================================
   1D PARTICLE IN A BOX - ENHANCED SIMULATION
   Compact Layout - No Scroll Design
   ============================================ */

/* CSS Variables - Design Tokens */
:root {
    /* Primary Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

    /* Solid Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #4facfe;
    --success-color: #00d9a5;
    --warning-color: #ffc107;
    --danger-color: #ff6b6b;

    /* Background Colors - Dark Theme */
    --bg-dark: #0f0f1a;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-glass: rgba(255, 255, 255, 0.08);

    /* Text Colors - Dark Theme */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* Borders & Shadows */
    --border-glass: rgba(255, 255, 255, 0.1);
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(102, 126, 234, 0.3);

    /* Compact Spacing - Reduced for smaller screens */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.4rem;
    --spacing-md: 0.6rem;
    --spacing-lg: 0.8rem;
    --spacing-xl: 1rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* Light Theme */
[data-theme="light"] {
    --bg-dark: #f0f2f5;
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.9);

    --text-primary: #1a1a2e;
    --text-secondary: rgba(26, 26, 46, 0.7);
    --text-muted: rgba(26, 26, 46, 0.5);

    --border-glass: rgba(102, 126, 234, 0.2);
    --shadow-soft: 0 4px 20px rgba(102, 126, 234, 0.15);
    --shadow-glow: 0 0 30px rgba(102, 126, 234, 0.25);
}

[data-theme="light"] body {
    background-image:
        radial-gradient(ellipse at top left, rgba(102, 126, 234, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(118, 75, 162, 0.12) 0%, transparent 50%);
}

/* Light theme canvas background */
[data-theme="light"] .canvas-container {
    background: rgba(255, 255, 255, 0.5) !important;
}

[data-theme="light"] canvas {
    background: rgba(245, 247, 250, 0.5) !important;
}

/* Light theme panel hover */
[data-theme="light"] .panel-section:hover {
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.1);
}

/* Light theme slider track */
[data-theme="light"] .custom-slider {
    background: rgba(102, 126, 234, 0.15);
}

/* Light theme toggle switch */
[data-theme="light"] .toggle-switch {
    background: rgba(102, 126, 234, 0.2);
}

[data-theme="light"] .toggle-switch.active {
    background: var(--primary-gradient);
}

/* Light theme scrollbar */
[data-theme="light"] .control-panel::-webkit-scrollbar-thumb,
[data-theme="light"] .info-panel::-webkit-scrollbar-thumb {
    background: var(--primary-color);
}

[data-theme="light"] .control-panel,
[data-theme="light"] .info-panel {
    scrollbar-color: var(--primary-color) rgba(102, 126, 234, 0.1);
}

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

html,
body {
    height: 100vh;
    overflow: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 12px;
    background: var(--bg-dark);
    background-image:
        radial-gradient(ellipse at top left, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(118, 75, 162, 0.15) 0%, transparent 50%);
    color: var(--text-primary);
    line-height: 1.3;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Main Container - Full Viewport */
.main-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1800px;
    margin: 0 auto;
    padding: var(--spacing-sm);
    overflow: hidden;
}

/* ============================================
   HEADER - Compact
   ============================================ */
.header {
    flex-shrink: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.quantum-icon {
    font-size: 1.5rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.header h1 {
    font-size: 1rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.subtitle {
    font-size: 0.65rem;
    color: var(--text-secondary);
    margin: 0;
}

.header-badges {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-normal);
}

.theme-toggle:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.theme-icon {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 4px 8px;
    background: rgba(0, 217, 165, 0.15);
    border: 1px solid rgba(0, 217, 165, 0.3);
    border-radius: 50px;
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--success-color);
}

.badge.running {
    background: rgba(79, 172, 254, 0.15);
    border-color: rgba(79, 172, 254, 0.3);
    color: var(--accent-color);
}

.badge.paused {
    background: rgba(255, 193, 7, 0.15);
    border-color: rgba(255, 193, 7, 0.3);
    color: var(--warning-color);
}

/* ============================================
   CONTENT WRAPPER - Flex Fill
   ============================================ */
.content-wrapper {
    display: grid;
    grid-template-columns: 200px 1fr 210px;
    gap: var(--spacing-sm);
    flex: 1;
    min-height: 0;
    height: calc(100vh - 60px);
    overflow: hidden;
}

/* ============================================
   PANEL STYLES - Compact
   ============================================ */
.control-panel,
.info-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) transparent;
}

.control-panel::-webkit-scrollbar,
.info-panel::-webkit-scrollbar {
    width: 4px;
}

.control-panel::-webkit-scrollbar-thumb,
.info-panel::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 2px;
}

.panel-section {
    flex-shrink: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition-normal);
}

.panel-section:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-soft);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--border-glass);
}

.section-title .icon {
    font-size: 0.85rem;
}

/* ============================================
   CONTROL GROUP - Compact
   ============================================ */
.control-group {
    margin-bottom: var(--spacing-sm);
}

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

.control-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.tooltip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: var(--bg-card);
    border-radius: 50%;
    font-size: 0.65rem;
    color: var(--text-muted);
    cursor: help;
}

.tooltip:hover {
    background: var(--primary-color);
    color: white;
}

/* Custom Slider - Compact */
.slider-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.custom-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.custom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-gradient);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(102, 126, 234, 0.5);
}

.custom-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary-gradient);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.slider-value {
    min-width: 32px;
    padding: 3px 6px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-color);
    text-align: center;
}

/* ============================================
   TOGGLE SWITCHES - Compact
   ============================================ */
.toggle-group {
    margin-bottom: var(--spacing-sm);
}

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

.toggle-switch {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.toggle-switch input {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 42px;
    height: 22px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 11px;
    transition: var(--transition-normal);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-normal);
}

.toggle-switch input:checked+.toggle-slider {
    background: var(--primary-gradient);
}

.toggle-switch input:checked+.toggle-slider::before {
    transform: translateX(20px);
}

.toggle-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

/* ============================================
   BUTTON STYLES - Compact
   ============================================ */
.button-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xs);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 6px 8px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.btn-icon {
    font-size: 0.8rem;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-danger {
    background: rgba(255, 107, 107, 0.2);
    border: 1px solid rgba(255, 107, 107, 0.3);
    color: var(--danger-color);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
}

.btn-outline:hover {
    background: var(--bg-card);
    border-color: var(--primary-color);
}

.keyboard-hint {
    margin-top: var(--spacing-sm);
    font-size: 0.6rem;
    color: var(--text-muted);
    text-align: center;
}

kbd {
    display: inline-block;
    padding: 1px 4px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-glass);
    border-radius: 3px;
    font-family: monospace;
    font-size: 0.6rem;
}

/* ============================================
   SIMULATION AREA - Fill Available Space
   ============================================ */
.simulation-area {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    min-height: 0;
    overflow: hidden;
}

.canvas-container {
    position: relative;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-normal);
}

#simulationCanvas {
    display: block;
    width: 100%;
    height: 100%;
    background: transparent;
    transition: opacity 0.3s ease;
}

.canvas-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: var(--spacing-md) var(--spacing-xl);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    pointer-events: none;
    transition: var(--transition-normal);
}

.canvas-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

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

/* Glow effect for canvas when running */
.canvas-container.running {
    box-shadow: var(--shadow-glow);
}

/* ============================================
   DATA PANEL - Compact Grid
   ============================================ */
.data-panel {
    flex-shrink: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-sm);
}

.data-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.data-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--primary-color);
}

.data-label {
    font-size: 0.55rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-muted);
    margin-bottom: 2px;
    white-space: nowrap;
}

.data-value {
    font-size: 1.1rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.data-unit {
    font-size: 0.5rem;
    color: var(--text-muted);
    margin-top: 1px;
}

.state-indicator {
    background: var(--primary-gradient) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
}

/* ============================================
   PROCEDURE SECTION - Compact
   ============================================ */
.procedure-list {
    list-style: none;
}

.procedure-step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.procedure-step:hover {
    background: rgba(255, 255, 255, 0.05);
}

.procedure-step.active {
    background: rgba(102, 126, 234, 0.15);
    border-left: 2px solid var(--primary-color);
}

.step-number {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    background: var(--primary-gradient);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
}

.step-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.step-text strong {
    color: var(--text-primary);
}

/* ============================================
   EQUATION CARDS - Compact
   ============================================ */
.equation-card {
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.equation-card:last-child {
    margin-bottom: 0;
}

.equation {
    font-family: 'Cambria Math', 'Times New Roman', serif;
    font-size: 1rem;
    color: var(--accent-color);
    margin-bottom: 4px;
}

.equation-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-muted);
}

/* ============================================
   TIP CARD - Compact
   ============================================ */
.tip-card {
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1) 0%, rgba(255, 152, 0, 0.1) 100%);
    border: 1px solid rgba(255, 193, 7, 0.2);
    border-radius: var(--radius-sm);
}

.tip-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   LEGEND - Compact
   ============================================ */
.legend-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 20px;
    height: 10px;
    border-radius: 2px;
}

/* ============================================
   FOOTER - Hidden on compact view
   ============================================ */
.footer {
    display: none;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1400px) {
    .content-wrapper {
        grid-template-columns: 190px 1fr 200px;
    }

    body {
        font-size: 11px;
    }

    .section-title {
        font-size: 0.65rem;
    }

    .btn {
        padding: 5px 7px;
        font-size: 0.65rem;
    }
}

@media (max-width: 1200px) {
    .content-wrapper {
        grid-template-columns: 170px 1fr 180px;
    }

    .data-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .control-group label {
        font-size: 0.7rem;
    }
}

@media (max-width: 992px) {
    .content-wrapper {
        grid-template-columns: 1fr;
        overflow-y: auto;
        height: auto;
    }

    .control-panel,
    .info-panel {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }

    html,
    body {
        overflow: auto;
    }

    .main-container {
        height: auto;
        min-height: 100vh;
        padding: var(--spacing-md);
    }

    .header h1 {
        font-size: 0.9rem;
    }

    .subtitle {
        font-size: 0.6rem;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 11px;
    }

    .content-wrapper {
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .data-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

/* ============================================
   ANIMATIONS - Subtle
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.panel-section {
    animation: fadeIn 0.3s ease forwards;
}

/* Focus states */
.control-group:focus-within label {
    color: var(--accent-color);
}

::selection {
    background: var(--primary-color);
    color: white;
}