/* ================================================
   SUPERRACE 용인 스피드웨이 관객석 증축 시뮬레이션
   Color Theme: Red (#E31E24), Black (#000), White (#FFF)
   ================================================ */

:root {
    /* SUPERRACE Brand Colors */
    --primary-red: #E31E24;
    --primary-black: #000000;
    --primary-white: #FFFFFF;
    --secondary-red: #C41519;
    --light-red: #FF3B3F;
    
    /* Zone Colors */
    --zone1-color: rgba(227, 30, 36, 0.7);
    --zone2-color: rgba(41, 128, 185, 0.7);
    
    /* UI Colors */
    --bg-dark: #FFFFFF;
    --bg-card: #F8F8F8;
    --bg-hover: #F0F0F0;
    --text-primary: #000000;
    --text-secondary: #333333;
    --text-muted: #666666;
    --border-color: #DDDDDD;
    --shadow: rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ================================================
   Reset & Base Styles
   ================================================ */

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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #FFFFFF;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* ================================================
   Header
   ================================================ */

.header {
    background: #B71C1C;
    padding: var(--spacing-lg) 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

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

.logo {
    flex-shrink: 0;
}

.logo-text {
    font-family: 'Rajdhani', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-white);
    font-style: italic;
    letter-spacing: 2px;
    text-shadow: 
        2px 2px 0 var(--primary-red),
        4px 4px 10px rgba(227, 30, 36, 0.5);
    line-height: 1;
}

.logo-subtitle {
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-red);
    letter-spacing: 4px;
    margin-top: -5px;
}

.header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-white);
    text-align: right;
}

/* ================================================
   Main Content
   ================================================ */

.main-content {
    padding: var(--spacing-xl) 0;
}

section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 8px 32px var(--shadow);
    border: 1px solid var(--border-color);
}

section h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-red);
}

section h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

/* ================================================
   Summary Card
   ================================================ */

.summary-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, #252525 100%);
    border: 2px solid var(--primary-red);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.summary-item {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.summary-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(227, 30, 36, 0.3);
    border-color: var(--primary-red);
}

.summary-item.highlight {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--secondary-red) 100%);
    border: none;
}

.summary-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.summary-value {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: 'Rajdhani', sans-serif;
    color: var(--primary-white);
    line-height: 1;
    margin: var(--spacing-xs) 0;
}

.summary-value.red {
    color: var(--light-red);
}

.summary-value.blue {
    color: #3498DB;
}

.summary-unit {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.budget-range {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.range-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
}

.range-item.active {
    background: rgba(227, 30, 36, 0.2);
    border: 1px solid var(--primary-red);
}

.range-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.range-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-white);
}

/* ================================================
   Visualization Section
   ================================================ */

.visualization-section {
    background: var(--bg-card);
}

.canvas-container {
    background: #0A0A0A;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 2px solid var(--border-color);
    overflow: hidden;
}

#siteCanvas {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-sm);
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.legend-color.zone1 {
    background: var(--zone1-color);
}

.legend-color.zone2 {
    background: var(--zone2-color);
}

.legend-color.seat {
    background: #FFD700;
}

.legend-color.aisle {
    background: #555555;
}

/* ================================================
   Parameters Section
   ================================================ */

.parameters-section {
    background: var(--bg-card);
}

.params-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.param-group {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.param-item {
    margin-bottom: var(--spacing-md);
}

.param-item:last-child {
    margin-bottom: 0;
}

.param-item label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.slider-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.slider-container input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

.slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-red);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.slider-container input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--primary-red);
}

.slider-container input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-red);
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
}

.slider-container input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--primary-red);
}

.slider-value {
    min-width: 60px;
    text-align: right;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-red);
    font-family: 'Rajdhani', sans-serif;
}

.param-info {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.param-impact {
    display: inline-block;
    margin-left: var(--spacing-sm);
    padding: 2px 8px;
    background: rgba(227, 30, 36, 0.2);
    border-radius: var(--radius-sm);
    font-weight: 600;
    color: var(--light-red);
}

/* ================================================
   Scenario Buttons
   ================================================ */

.scenario-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

.scenario-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: inherit;
    color: var(--text-primary);
}

.scenario-btn:hover {
    border-color: var(--primary-red);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(227, 30, 36, 0.3);
}

.scenario-btn.active {
    background: var(--primary-red);
    border-color: var(--primary-red);
}

.scenario-label {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.scenario-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.scenario-btn.active .scenario-desc {
    color: rgba(255, 255, 255, 0.9);
}

/* ================================================
   Action Buttons
   ================================================ */

.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.btn-primary,
.btn-secondary {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: inherit;
}

.btn-primary {
    background: var(--primary-red);
    color: var(--primary-white);
}

.btn-primary:hover {
    background: var(--secondary-red);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(227, 30, 36, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-red);
    color: var(--primary-red);
}

/* ================================================
   Details Section
   ================================================ */

.details-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

@media (max-width: 992px) {
    .details-grid {
        grid-template-columns: 1fr;
    }
}

.detail-card {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.detail-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    font-size: 0.95rem;
}

.detail-row span:first-child {
    color: var(--text-secondary);
}

.detail-row span:last-child {
    font-weight: 600;
    color: var(--text-primary);
}

.detail-row.highlight {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    font-weight: 700;
}

.detail-row.highlight span:last-child {
    color: var(--primary-red);
    font-size: 1.2rem;
}

.detail-row.per-seat {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.budget-detail {
    border: 2px solid var(--primary-red);
    background: rgba(227, 30, 36, 0.05);
}

/* ================================================
   Options Section
   ================================================ */

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.option-card {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.option-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.option-selector label {
    display: block;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.option-selector label:hover {
    background: rgba(255, 255, 255, 0.1);
}

.option-selector input[type="radio"] {
    margin-right: var(--spacing-xs);
    accent-color: var(--primary-red);
}

.option-checkbox label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.option-checkbox label:hover {
    background: rgba(255, 255, 255, 0.1);
}

.option-checkbox input[type="checkbox"] {
    margin-right: var(--spacing-xs);
    accent-color: var(--primary-red);
}

.option-price {
    color: var(--primary-red);
    font-weight: 600;
}

.option-cost {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    font-weight: 600;
}

.option-cost span:last-child {
    color: var(--primary-red);
}

.final-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--secondary-red) 100%);
    border-radius: var(--radius-md);
    font-size: 1.3rem;
    font-weight: 700;
}

.final-total span:last-child {
    font-size: 1.8rem;
    font-family: 'Rajdhani', sans-serif;
}

/* ================================================
   Footer
   ================================================ */

.footer {
    background: var(--primary-black);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 3px solid var(--primary-red);
}

.footer p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.footer .note {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ================================================
   Responsive Design
   ================================================ */

@media (max-width: 1200px) {
    .header .container {
        flex-direction: column;
        text-align: center;
    }
    
    .header h1 {
        text-align: center;
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .logo-text {
        font-size: 2rem;
    }
    
    .header h1 {
        font-size: 1.3rem;
    }
    
    .summary-grid {
        grid-template-columns: 1fr;
    }
    
    .summary-value {
        font-size: 2rem;
    }
    
    .params-grid,
    .details-grid,
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .scenario-buttons {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    section {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
    }
    
    .logo-text {
        font-size: 1.5rem;
    }
    
    .logo-subtitle {
        font-size: 0.7rem;
    }
    
    section h2 {
        font-size: 1.4rem;
    }
    
    .summary-value {
        font-size: 1.6rem;
    }
}

/* ================================================
   Animations
   ================================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

section {
    animation: fadeIn 0.6s ease-out;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.summary-item.highlight {
    animation: pulse 2s infinite;
}

/* ================================================
   Print Styles
   ================================================ */

@media print {
    body {
        background: white;
        color: black;
    }
    
    .header,
    .footer,
    .action-buttons {
        display: none;
    }
    
    section {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}