:root {
    /* === RETRO-FUTURISTIC COLOR PALETTE === */
    
    /* Primary Brand Colors - Evolved */
    --primary-color: #e96834; /* Keep original Tante Toos orange */
    --secondary-color: #90cdc2; /* Keep original mint green */
    
    /* Deep Space Foundation Colors */
    --retro-deep-blue: #0a1628;    /* Deepest space blue */
    --retro-space-blue: #1e3a8a;   /* Deep cosmic blue */
    --retro-navy: #2d4a87;         /* Rich navy accent */
    --retro-midnight: #0f172a;     /* Almost black base */
    
    /* Electric Accent Colors */
    --retro-cyan: #00ffff;         /* Electric cyan */
    --retro-magenta: #ff0080;      /* Hot magenta */
    --retro-electric: #00ff88;     /* Electric green */
    --retro-neon-blue: #4fc3f7;    /* Bright neon blue */
    --retro-pink: #ff1493;         /* Neon pink */
    
    /* Gradient Colors */
    --retro-gradient-primary: linear-gradient(135deg, #0a1628 0%, #1e3a8a 50%, #2d4a87 100%);
    --retro-gradient-electric: linear-gradient(90deg, #00ffff 0%, #ff0080 100%);
    --retro-gradient-glow: linear-gradient(45deg, #00ff88 0%, #4fc3f7 50%, #ff1493 100%);
    
    /* Glass/Transparency Effects */
    --retro-glass-light: rgba(255, 255, 255, 0.1);
    --retro-glass-medium: rgba(255, 255, 255, 0.15);
    --retro-glass-strong: rgba(255, 255, 255, 0.25);
    --retro-dark-glass: rgba(0, 0, 0, 0.3);
    
    /* Glow Effects */
    --glow-cyan: 0 0 20px rgba(0, 255, 255, 0.5);
    --glow-magenta: 0 0 20px rgba(255, 0, 128, 0.5);
    --glow-electric: 0 0 20px rgba(0, 255, 136, 0.5);
    --glow-orange: 0 0 20px rgba(233, 104, 52, 0.5);
    
    /* Legacy Metro Colors (kept for compatibility) */
    --metro-purple: #5c2d91;
    --metro-blue: var(--secondary-color);
    --metro-teal: #00b294;
    --metro-green: var(--primary-color);
    --metro-lime: #bad80a;
    --metro-yellow: #fff100;
    --metro-orange: var(--primary-color);
    --metro-red: #e81123;
    --metro-magenta: #ec008c;
    
    /* Neutral Tones - Updated for Retro-Futuristic */
    --metro-dark: #0f172a;         /* Much darker base */
    --metro-medium: #64748b;       /* Cooler medium gray */
    --metro-light: #f1f5f9;        /* Slightly cooler light */
    --metro-white: #ffffff;
    
    /* Typography - Retro-Futuristic Font System */
    --font-primary: 'Orbitron', 'Courier New', monospace;     /* Geometric futuristic */
    --font-secondary: 'Rajdhani', 'Open Sans', sans-serif;    /* Clean tech sans-serif */
    --font-mono: 'Courier New', 'Consolas', monospace;        /* Terminal/code style */
    --font-fallback: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Font Sizes - Scaled for 768px width */
    --font-size-xl: 2.2rem;      /* Large headers */
    --font-size-large: 1.6rem;   /* Section headers */
    --font-size-medium: 1.1rem;  /* Body text */
    --font-size-normal: 0.85rem; /* Secondary text */
    --font-size-small: 0.7rem;   /* Fine print */
    
    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-black: 900;
    
    /* Animation & Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-glow: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius System */
    --border-radius-small: 4px;
    --border-radius-medium: 8px;
    --border-radius-large: 12px;
    --border-radius-xl: 20px;
    
    /* Spacing System */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
}

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

body {
    font-family: var(--font-secondary);
    background: var(--retro-gradient-primary);
    color: var(--metro-white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
    letter-spacing: 0.025em;
    position: relative;
    overflow-x: hidden;
}

/* Retro-Futuristic Background Effects */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    pointer-events: none;
    z-index: 1;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, transparent 0%, rgba(10, 22, 40, 0.3) 100%);
    pointer-events: none;
    z-index: 2;
}

/* Simplified Background Effects - Performance Optimized */
.main-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 70%, rgba(0, 255, 255, 0.03) 0%, transparent 60%);
    pointer-events: none;
    z-index: 1;
    /* Removed expensive animations */
}

.main-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 70% 30%, rgba(0, 255, 136, 0.02) 0%, transparent 60%);
    pointer-events: none;
    z-index: 1;
    /* Removed expensive animations */
}

/* Removed particle-float animations for performance */

/* Retro-Futuristic Header Bar */
.status-bar {
    background: linear-gradient(135deg, var(--retro-deep-blue) 0%, var(--retro-space-blue) 100%);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--retro-cyan);
    box-shadow: 
        0 4px 20px rgba(0, 255, 255, 0.2),
        inset 0 1px 0 var(--retro-glass-light);
    padding: 0.7rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--metro-white);
    font-family: var(--font-primary);
    font-size: var(--font-size-medium);
    font-weight: var(--font-weight-bold);
    height: 48px;
    position: relative;
    z-index: 100;
}

.status-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--retro-cyan), transparent);
    opacity: 0.6;
    /* Removed continuous animation for performance */
}

.status-logo {
    display: flex;
    align-items: center;
}

.status-logo img {
    height: 32px;
    width: auto;
}

.device-id {
    font-family: var(--font-mono);
    font-size: var(--font-size-normal);
    font-weight: var(--font-weight-bold);
    color: var(--retro-cyan);
    background: var(--retro-dark-glass);
    backdrop-filter: blur(5px);
    border: 1px solid var(--retro-glass-light);
    border-radius: var(--border-radius-small);
    padding: 0.3rem 0.8rem;
    letter-spacing: 0.1em;
    flex: 1;
    text-align: center;
    margin: 0 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
    box-shadow: inset 0 1px 0 var(--retro-glass-light);
}

.debug-info-toggle {
    font-family: var(--font-mono);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-bold);
    background: var(--retro-dark-glass);
    color: var(--retro-electric);
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--retro-glass-light);
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: var(--transition-glow);
    margin-right: 0.5rem;
    user-select: none;
    letter-spacing: 0.1em;
    text-shadow: 0 0 8px rgba(0, 255, 136, 0.3);
}

.debug-info-toggle:hover {
    background: var(--retro-glass-medium);
    /* Simplified hover effect */
}

.debug-info-toggle.active {
    background: var(--retro-glass-strong);
    color: var(--retro-cyan);
    text-shadow: 0 0 12px rgba(0, 255, 255, 0.8);
    box-shadow: var(--glow-cyan);
}

.debug-panel {
    position: absolute;
    top: 48px;
    right: 0;
    width: 100%;
    max-width: 500px;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.95) 0%, rgba(15, 23, 42, 0.9) 100%);
    backdrop-filter: blur(15px);
    border: 2px solid var(--retro-glass-light);
    border-top: none;
    border-right: none;
    color: var(--retro-electric);
    z-index: 1000;
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.8),
        0 0 50px rgba(0, 255, 136, 0.2),
        inset 0 1px 0 var(--retro-glass-light);
    font-family: var(--font-mono);
    font-size: var(--font-size-small);
    display: none;
    border-bottom-left-radius: var(--border-radius-medium);
    overflow: hidden;
    position: relative;
}

.debug-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--retro-gradient-electric);
    opacity: 0.7;
    /* Removed animation for performance */
}

.debug-panel::after {
    content: '> DEBUG_TERMINAL_ACTIVE';
    position: absolute;
    top: 8px;
    left: 12px;
    font-size: 10px;
    color: var(--retro-cyan);
    opacity: 0.7;
    letter-spacing: 0.1em;
}

.debug-panel.active {
    display: block;
    animation: terminal-boot 0.5s ease-out;
}

@keyframes terminal-boot {
    0% { 
        opacity: 0; 
        transform: translateY(-20px); 
    }
    50% { 
        opacity: 0.7; 
        transform: translateY(-5px); 
    }
    100% { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.debug-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 16px 12px 16px;
    margin-top: 30px;
    border-bottom: 1px solid rgba(0, 255, 136, 0.2);
    position: relative;
    transition: all 0.3s ease;
}

.debug-row::before {
    content: '>';
    position: absolute;
    left: 8px;
    color: var(--retro-cyan);
    font-weight: var(--font-weight-bold);
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.5);
    animation: cursor-blink 1s infinite;
}

.debug-row:hover {
    background: rgba(0, 255, 136, 0.05);
    border-color: var(--retro-electric);
}

@keyframes cursor-blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0.3; }
}

.debug-label {
    font-family: var(--font-mono);
    font-weight: var(--font-weight-bold);
    font-size: 11px;
    color: var(--retro-neon-blue);
    text-shadow: 0 0 5px rgba(79, 195, 247, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-left: 8px;
}

.debug-value {
    max-width: 320px;
    text-align: right;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: var(--font-mono);
    font-weight: var(--font-weight-bold);
    color: var(--retro-electric);
    text-shadow: 0 0 8px rgba(0, 255, 136, 0.4);
    background: rgba(0, 255, 136, 0.05);
    padding: 2px 6px;
    border-radius: 2px;
    border: 1px solid rgba(0, 255, 136, 0.2);
}

.debug-actions {
    display: flex;
    justify-content: space-between;
    padding: 15px 12px;
    gap: 10px;
    border-top: 1px solid var(--retro-glass-light);
    margin-top: 10px;
    background: rgba(0, 0, 0, 0.3);
}

.debug-button {
    background: linear-gradient(135deg, var(--retro-space-blue) 0%, var(--retro-navy) 100%);
    color: var(--retro-cyan);
    border: 1px solid var(--retro-glass-light);
    border-radius: var(--border-radius-small);
    padding: 8px 12px;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    flex: 1;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-shadow: 0 0 8px rgba(0, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.debug-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.debug-button:hover {
    background: linear-gradient(135deg, var(--retro-navy) 0%, var(--retro-space-blue) 100%);
    border-color: var(--retro-cyan);
    color: var(--retro-cyan);
    text-shadow: 0 0 12px rgba(0, 255, 255, 0.8);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
    transform: translateY(-1px);
}

.debug-button:hover::before {
    left: 100%;
}

.debug-button:active {
    background: linear-gradient(135deg, var(--retro-deep-blue) 0%, var(--retro-navy) 100%);
    box-shadow: 
        0 0 10px rgba(0, 255, 255, 0.4),
        inset 0 2px 4px rgba(0, 0, 0, 0.3);
    transform: translateY(0);
}

.status-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.status-info .time {
    font-family: var(--font-mono);
    font-size: var(--font-size-medium);
    font-weight: var(--font-weight-bold);
    color: var(--retro-neon-blue);
    text-shadow: 0 0 10px rgba(79, 195, 247, 0.5);
    letter-spacing: 0.1em;
}

.status-info .status {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: var(--font-size-normal);
    font-weight: var(--font-weight-bold);
    background: linear-gradient(90deg, var(--retro-electric), var(--secondary-color));
    padding: 0.3rem 0.7rem;
    color: var(--retro-midnight);
    border-radius: var(--border-radius-small);
    text-shadow: none;
    letter-spacing: 0.05em;
    box-shadow: 
        0 0 15px rgba(0, 255, 136, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Main Container */
.main-container {
    flex: 1;
    padding: 1.5rem;
    padding-top: 140px; /* Extra ruimte voor progress bar en header - genoeg ruimte */
    max-width: 768px;
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 10;
}

/* Status Message */
.status-message {
    background-color: var(--secondary-color);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.15);
    color: var(--metro-dark);
}

.status-message p {
    margin: 0;
    font-size: var(--font-size-medium);
    color: var(--metro-dark);
}

.status-message p:first-child {
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.status-message .closing-time {
    font-size: var(--font-size-normal);
    opacity: 0.9;
}

/* Metro Grid Dashboard */
.dashboard {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: minmax(150px, auto);
    gap: 16px;
    width: 100%;
}

/* Dashboard Fullwidth Item */
.dashboard-fullwidth {
    grid-column: span 12;
    width: 100%;
    margin-bottom: 1rem;
}

/* Metro Tiles */
.action-tile {
    grid-column: span 3;
    background-color: var(--secondary-color);
    color: var(--metro-dark);
    padding: 2rem;
    text-align: left;
    cursor: pointer;
    transition: transform var(--transition-fast) ease, box-shadow var(--transition-fast) ease;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 180px;
    position: relative;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
}

.action-tile h2 {
    font-size: var(--font-size-medium);
    margin-bottom: 0.75rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.action-tile p {
    font-size: var(--font-size-normal);
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.action-tile:hover {
    transform: translateY(-4px);
}

.action-tile:active {
    transform: scale(0.98);
}

/* Tile Color Variations */
.action-tile[onclick*="open.php"] {
    background-color: var(--primary-color);
    color: var(--metro-white);
}

.action-tile[onclick*="help.php"] {
    background-color: var(--primary-color);
    color: var(--metro-white);
}

.action-tile[onclick*="contact.php"] {
    background-color: var(--primary-color);
    color: var(--metro-white);
}

.action-tile[onclick*="info.php"] {
    background-color: var(--secondary-color);
}

/* Metro Buttons */
.metro-button {
    background-color: var(--primary-color);
    color: var(--metro-white);
    border: none;
    padding: 1.25rem 2.5rem;
    font-size: 1.25rem;
    cursor: pointer;
    transition: background-color var(--transition-fast) ease;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

.metro-button:hover {
    background-color: #d35826;
}

.metro-button:active {
    background-color: #bc4e22;
}

.metro-button:disabled {
    background-color: var(--metro-medium);
    cursor: not-allowed;
}

/* Metro Inputs */
.metro-input {
    background-color: var(--metro-white);
    border: 1px solid var(--metro-medium);
    color: var(--metro-dark);
    padding: 1.25rem;
    font-size: var(--font-size-medium);
    width: 100%;
    transition: border-color var(--transition-fast) ease;
}

.metro-input:focus {
    border-color: var(--secondary-color);
    outline: none;
}

/* Bottom Navigation */
.bottom-nav {
    display: flex;
    width: 100%;
    background-color: var(--primary-color);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-button {
    flex: 1;
    padding: 1.5rem;
    background-color: transparent;
    color: var(--metro-white);
    font-size: 1.25rem;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: background-color var(--transition-fast) ease;
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nav-button:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.nav-button:active {
    background-color: rgba(255, 255, 255, 0.25);
}

/* Touch Effect */
.touch-ripple {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 0.5;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

.touch-ripple.active::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    animation: ripple 0.8s ease-out;
}

/* Metro-style Weather Widget */
.weather-widget {
    background: var(--metro-white);
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.weather-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
}

.weather-info {
    flex: 1;
}

.weather-temp {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--metro-dark);
}

.weather-desc {
    color: var(--metro-dark);
    opacity: 0.8;
}

.weather-details {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--metro-dark);
    opacity: 0.7;
}

/* Metro-style Locker Status */
.locker-status {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 1rem;
    width: 100%;
}

.locker-type {
    background-color: var(--secondary-color);
    padding: 1.5rem;
    border-radius: 4px;
    color: var(--metro-dark);
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    width: 100%;
    margin: 0;
}

.locker-type h3 {
    font-size: var(--font-size-medium);
    margin-bottom: 0.5rem;
}

/* Update locker status with emojis */
.locker-type:nth-child(1) h3::before { content: '📦 '; }
.locker-type:nth-child(2) h3::before { content: '🎒 '; }
.locker-type:nth-child(3) h3::before { content: '🧳 '; }

/* Metro-style Cards */
.metro-card {
    background-color: var(--metro-white);
    border-radius: 4px;
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.metro-card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* Touch Device Specific Styles - Enhanced for Kiosk */
.touch-device .action-tile,
.touch-device .numpad-button,
.touch-device .payment-option,
.touch-device .close-button,
.touch-device .select-button,
.touch-device .locker-size {
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
}

.touch-device .action-tile:active,
.touch-device .numpad-button:active,
.touch-device .payment-option:active,
.touch-device .select-button:active,
.touch-device .locker-size:active {
    transform: scale(0.96);
    filter: brightness(1.2);
}

.touch-device .pressed {
    transform: scale(0.96) !important;
    filter: brightness(1.2) !important;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.4) !important;
}

/* Kiosk-Specific Responsive Scaling */
@media screen and (max-width: 1024px) {
    :root {
        --font-size-xl: 2rem;
        --font-size-large: 1.4rem;
        --font-size-medium: 1rem;
        --font-size-normal: 0.8rem;
        --font-size-small: 0.65rem;
    }
    
    .status-bar {
        height: 44px;
        padding: 0.5rem 1rem;
    }
    
    .main-container {
        padding: 1rem;
    }
    
    .locker-size {
        min-height: 140px;
        padding: 20px 15px;
    }
    
    .numpad-container {
        max-width: 320px;
    }
    
    .numpad-button {
        padding: 16px;
        font-size: 18px;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --font-size-xl: 1.8rem;
        --font-size-large: 1.2rem;
        --font-size-medium: 0.9rem;
        --font-size-normal: 0.75rem;
        --font-size-small: 0.6rem;
    }
    
    .status-bar {
        height: 40px;
        padding: 0.4rem 0.8rem;
    }
    
    .device-id {
        font-size: 0.7rem;
        padding: 0.2rem 0.6rem;
        margin: 0 0.5rem;
    }
    
    .locker-sizes {
        gap: 1rem;
    }
    
    .locker-size {
        min-height: 120px;
        padding: 16px 12px;
    }
    
    .modal-content {
        width: 95%;
        margin: 2.5vh auto;
    }
}

.section-header {
    background: linear-gradient(135deg, var(--retro-space-blue), var(--retro-navy));
    backdrop-filter: blur(10px);
    border: 1px solid var(--retro-glass-light);
    border-left: 4px solid var(--retro-cyan);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--metro-white);
    border-radius: var(--border-radius-medium);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.3),
        0 0 30px rgba(0, 255, 255, 0.1),
        inset 0 1px 0 var(--retro-glass-light);
    position: relative;
    overflow: hidden;
}

.section-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 4px;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--retro-cyan), transparent);
    animation: pulse-glow 2s ease-in-out infinite;
}

.section-header::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--retro-gradient-electric);
    animation: neon-pulse 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

@keyframes neon-pulse {
    0%, 100% { box-shadow: 0 0 5px var(--retro-cyan); }
    50% { box-shadow: 0 0 20px var(--retro-cyan), 0 0 30px var(--retro-magenta); }
}

.section-header h2 {
    margin: 0;
    font-family: var(--font-primary);
    font-size: 1.3rem;
    font-weight: var(--font-weight-black);
    letter-spacing: 0.1em;
    padding-left: 15px;
    text-transform: uppercase;
    text-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
    position: relative;
    z-index: 1;
}

/* Custom container for locker size selection */
.size-selection-container {
    margin: 0 auto;
}

/* Locker Sizes Grid */
.locker-sizes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 0 auto;
}