:root {
    --bg-gradient: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
    --panel-bg: rgba(22, 27, 34, 0.98);
    --accent-color: #58a6ff;
    --accent-hover: #79b8ff;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --danger: #f85149;
    --success: #3fb950;
    --warning: #d29922;
    --border-color: rgba(48, 54, 61, 0.8);
    --border-radius: 8px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent; /* Mobile tap highlight removal */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    line-height: 1.5;
}

.game-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* --- Mobile First Layout --- */
.sidebar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 32vh;
    background: var(--panel-bg);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md);
    overflow-y: auto;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.game-area {
    flex: 1;
    position: relative;
    height: 68vh;
    width: 100%;
    background: #0d1117;
    overflow: auto;
}

/* --- Desktop Styles --- */
@media (min-width: 768px) {
    .game-container {
        flex-direction: row;
    }
    
    .sidebar {
        position: relative;
        width: 340px;
        height: 100%;
        border-top: none;
        border-right: 1px solid var(--border-color);
    }

    .game-area {
        height: 100%;
    }
}

/* --- Map & Objects --- */
.airport-map {
    width: 2000px;
    height: 3000px;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(88, 166, 255, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(63, 185, 80, 0.02) 0%, transparent 50%),
        #0d1117;
    position: relative;
    background-image:
        linear-gradient(rgba(48, 54, 61, 0.4) 1px, transparent 1px),
        linear-gradient(90deg, rgba(48, 54, 61, 0.4) 1px, transparent 1px);
    background-size: 50px 50px;
    cursor: crosshair;
    touch-action: none;
}

/* Player */
.player {
    position: absolute;
    width: 40px;
    height: 40px;
    background: var(--success);
    border: 2px solid #2ea043;
    border-radius: 50%;
    z-index: 100;
    box-shadow:
        0 0 20px rgba(63, 185, 80, 0.4),
        inset 0 2px 4px rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.player::after {
    content: '🔧';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 18px;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
}

/* Zones & Desks */
.checkin-zone {
    position: absolute;
    background: rgba(22, 27, 34, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    backdrop-filter: blur(10px);
}

.zone-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.desks-column {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 24px;
    justify-content: center;
    padding: var(--spacing-sm);
}

.checkin-desk {
    width: 56px;
    height: 56px;
    background: linear-gradient(145deg, #21262d, #1c2128);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    transition: all 0.15s ease;
}

.checkin-desk:hover {
    background: linear-gradient(145deg, #30363d, #21262d);
    border-color: var(--accent-color);
}

.checkin-desk:active {
    transform: scale(0.96);
}

.checkin-desk.has-issue {
    background: linear-gradient(145deg, #da3633, #b62318);
    border-color: #f85149;
    color: white;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(248, 81, 73, 0.5);
        transform: scale(1);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(248, 81, 73, 0);
        transform: scale(1.02);
    }
}

/* UI Panels (Sidebar Content) */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    background: rgba(13, 17, 23, 0.6);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.stat-label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

/* Tickets */
.ticket-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.ticket {
    background: rgba(210, 153, 34, 0.08);
    border: 1px solid rgba(210, 153, 34, 0.3);
    border-left: 3px solid var(--warning);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.ticket:hover {
    background: rgba(210, 153, 34, 0.15);
    border-color: rgba(210, 153, 34, 0.5);
    transform: translateX(2px);
}

.ticket-info {
    font-size: 13px;
    line-height: 1.4;
}

.ticket-info strong {
    color: var(--text-primary);
    font-weight: 600;
}

.ticket-info small {
    color: var(--text-muted);
    font-size: 11px;
}

.ticket-timer {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 14px;
    font-weight: 600;
    color: var(--warning);
    background: rgba(210, 153, 34, 0.15);
    padding: 4px 8px;
    border-radius: 4px;
}

/* Skills / Upgrades */
.skills-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.skill-card {
    background: rgba(13, 17, 23, 0.6);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.15s ease;
}

.skill-card:hover {
    border-color: rgba(88, 166, 255, 0.3);
}

.skill-info h4 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.skill-level {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 500;
}

.upgrade-btn {
    background: var(--accent-color);
    border: none;
    color: white;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.upgrade-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.upgrade-btn:active:not(:disabled) {
    transform: translateY(0);
}

.upgrade-btn:disabled {
    background: #30363d;
    color: var(--text-muted);
    cursor: not-allowed;
}

/* Notifications */
.notification {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--success);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    z-index: 2000;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.notification.error {
    background: var(--danger);
}

.notification.warning {
    background: var(--warning);
    color: #1c2128;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #484f58;
}