styles.css

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #2c3e50;
    --secondary-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --text-color: #2c3e50;
    --bg-color: #ecf0f1;
    --panel-bg: #ffffff;
    --border-color: #e0e0e0;
    --input-bg: #ffffff;
    --progress-bg: #e0e0e0;
    --hover-bg: #f5f5f5;
    --label-color: #666;
    --queue-theme: #9b59b6;
    --queue-gradient: linear-gradient(135deg, var(--queue-theme), #8e44ad);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    
    /* Border Radius */
    --radius-sm: 5px;
    --radius-md: 8px;
    --radius-lg: 10px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

[data-theme="dark"] {
    --text-color: #ecf0f1;
    --bg-color: #2c3e50;
    --panel-bg: #34495e;
    --border-color: #4a6278;
    --input-bg: #2c3e50;
    --progress-bg: #2c3e50;
    --hover-bg: #2c3e50;
    --label-color: #bdc3c7;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Header styles */
header {
    text-align: center;
    background: var(--queue-gradient);
    padding: var(--spacing-lg);
    color: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
}

h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.algorithm-note {
    background-color: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    display: inline-block;
    margin-top: var(--spacing-xs);
    font-weight: bold;
}

/* Panel layout */
.panels {
    display: grid;
    grid-template-columns: 300px minmax(500px, 1fr) 300px;
    gap: var(--spacing-lg);
    align-items: stretch;
}

/* Common panel styles */
.operations-panel,
.visualization-panel,
.status-panel {
    background: var(--panel-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: background-color var(--transition-normal);
}

h2 {
    color: var(--queue-theme);
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
    padding-bottom: var(--spacing-xs);
}

h3 {
    color: var(--queue-theme);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

/* Operations Panel */
.capacity-indicator {
    margin-bottom: var(--spacing-lg);
}

.progress-bar {
    height: 30px;
    background: var(--progress-bg);
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
    border: 2px solid var(--border-color);
}

.progress {
    height: 100%;
    transition: width var(--transition-normal), background-color var(--transition-normal);
}

.input-section {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--label-color);
    font-weight: 500;
}

input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: border-color var(--transition-normal);
    background: var(--input-bg);
    color: var(--text-color);
}

input:focus {
    outline: none;
    border-color: var(--queue-theme);
}

.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.btn:hover {
    opacity: 0.9;
}

.btn:active {
    transform: scale(0.98);
}

.btn.success { background: var(--success-color); color: white; }
.btn.danger { background: var(--secondary-color); color: white; }
.btn.primary { background: var(--queue-theme); color: white; }

/* Visualization Panel */
.visualization-panel {
    background: var(--panel-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: background-color var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.garage-container {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: var(--spacing-lg);
    min-height: 400px;
    position: relative;
    padding: var(--spacing-md);
    background: var(--panel-bg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--queue-theme);
    align-items: center;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    margin-top: 8.0px;
    margin-bottom: 8.0px;
}

.garage-queue {
    display: grid;
    grid-template-rows: repeat(10, 60px);
    gap: 15px;
    padding: var(--spacing-md);
    align-items: center;
    position: relative;
    width: 100%;
}

.entrance, .exit {
    background: var(--queue-theme);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: bold;
    text-align: center;
    width: 160px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    font-size: 0.9rem;
}

.entrance {
    top: -20px;
}

.exit {
    bottom: -20px;
}

.entrance::before, .exit::before {
    display: none;
}

.parking-spot {
    width: 100%;
    height: 60px;
    background: var(--bg-color);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1rem;
    transition: all var(--transition-normal);
    position: relative;
    max-width: 400px;
    margin: 0 auto;
}

.parking-spot::before {
    display: none;
}

.parking-spot.occupied {
    background: var(--queue-theme);
    color: white;
    border-color: var(--queue-theme);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.parking-spot.moving {
    background: var(--warning-color);
    border-color: var(--warning-color);
    z-index: 2;
}

.queue-labels {
    display: none;
}

/* Legend */
.legend {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xs);
    font-size: 1.0rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--label-color);
}

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

.legend-color.empty {
    background: var(--bg-color);
    border: 2px dashed var(--border-color);
}

.legend-color.occupied { 
    background: var(--queue-theme);
}

.legend-color.moving { 
    background: var(--warning-color);
}

/* Update animations for vertical movement */
@keyframes enterFromTop {
    0% { 
        opacity: 0; 
        transform: translateY(-100%);
    }
    100% { 
        opacity: 1; 
        transform: translateY(0);
    }
}

@keyframes exitToBottom {
    0% { 
        opacity: 1; 
        transform: translateY(0);
    }
    100% { 
        opacity: 0; 
        transform: translateY(100%);
    }
}

@keyframes moveDown {
    0% { 
        transform: translateY(0);
    }
    100% { 
        transform: translateY(51px); /* Height of spot (45px) + gap (6px) */
    }
}

@keyframes moveUp {
    0% { 
        transform: translateY(0);
    }
    100% { 
        transform: translateY(-51px); /* Height of spot (45px) + gap (6px) */
    }
}

.parking-spot.entering { 
    animation: enterFromTop 0.5s ease-out;
}

.parking-spot.exiting { 
    animation: exitToBottom 0.5s ease-out;
}

.parking-spot.moving-down { 
    animation: moveDown 0.5s ease-out forwards;
}

.parking-spot.moving-up { 
    animation: moveUp 0.5s ease-out forwards;
}

/* Status Panel */
.statistics {
    background: var(--bg-color);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

.statistics p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.cars-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.empty-message {
    text-align: center;
    color: var(--label-color);
    padding: var(--spacing-sm);
    font-style: italic;
}

.car-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-normal);
}

.car-list-item:hover {
    background: var(--hover-bg);
}

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

.car-info span:first-child {
    font-weight: 500;
}

.position-label {
    color: var(--queue-theme);
    font-size: 0.9rem;
    font-weight: 500;
}

.remove-car-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
    min-width: unset;
    opacity: 0.8;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.remove-car-btn:hover {
    opacity: 1;
    transform: scale(1.05);
}

.remove-car-btn:active {
    transform: scale(0.95);
}

.remove-car-btn i {
    margin-right: 0;
}

/* Notice Pane */
.notice-pane {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    background: var(--bg-color);
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.notice-message {
    text-align: center;
    transition: color var(--transition-normal);
    font-size: 0.95rem;
}

.notice-message.success { color: var(--success-color); }
.notice-message.error { color: var(--secondary-color); }

/* Theme Toggle */
.theme-toggle {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: background-color var(--transition-normal);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Animations */
@keyframes enterFromTop {
    0% { 
        opacity: 0; 
        transform: translateY(-100%);
    }
    100% { 
        opacity: 1; 
        transform: translateY(0);
    }
}

@keyframes exitToBottom {
    0% { 
        opacity: 1; 
        transform: translateY(0);
    }
    100% { 
        opacity: 0; 
        transform: translateY(100%);
    }
}

@keyframes moveDown {
    0% { 
        transform: translateY(0);
    }
    100% { 
        transform: translateY(51px); /* Height of spot (45px) + gap (6px) */
    }
}

@keyframes moveUp {
    0% { 
        transform: translateY(0);
    }
    100% { 
        transform: translateY(-51px); /* Height of spot (45px) + gap (6px) */
    }
}

.parking-spot.entering { 
    animation: enterFromTop 0.5s ease-out;
}

.parking-spot.exiting { 
    animation: exitToBottom 0.5s ease-out;
}

.parking-spot.moving-down { 
    animation: moveDown 0.5s ease-out forwards;
}

.parking-spot.moving-up { 
    animation: moveUp 0.5s ease-out forwards;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--panel-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.modal-content p {
    margin-bottom: var(--spacing-md);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .panels {
        grid-template-columns: 300px 1fr;
    }
    
    .status-panel {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }

    .panels {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .status-panel {
        grid-column: span 1;
    }
    
    .garage-queue {
        padding: var(--spacing-sm);
    }
    
    .parking-spot {
        width: 60px;
        height: 60px;
        font-size: 0.8rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .algorithm-note {
        font-size: 0.9rem;
    }
}

/* Update responsive design for visualization */
@media (max-width: 1200px) {
    .garage-container {
        max-width: 350px;
    }
    
    .parking-spot {
        max-width: 250px;
    }
}

@media (max-width: 900px) {
    .garage-container {
        max-width: 300px;
    }
    
    .parking-spot {
        max-width: 200px;
    }
}

.explanation-pane {
    margin-top: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--panel-bg);
}

.button-group + .explanation-pane {
    border-top: 2px solid var(--border-color);
}