:root {
    --bg-dark: #020617;
    --game-max-size: min(100vw, 90vh);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(20px);

    --accent-gold: #c5a059;
    --accent-blue: #38bdf8;
    --accent-green: #4ade80;
    --accent-yellow: #facc15;
    --accent-danger: #ef4444;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --font-main: 'Outfit', sans-serif;

    --zone-res: #22c55e;
    --zone-com: #3b82f6;
    --zone-ind: #eab308;
    --road-color: #334155;
}

* {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

#game-container {
    background: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-main);
    position: relative;
    width: 100%;
    max-width: var(--game-max-size);
    height: 0;
    padding-bottom: min(100vw, 90vh);
    max-height: 90vh;
    margin: 0 auto;
    overflow: hidden;
    background-image:
        radial-gradient(circle at 10% 10%, rgba(56, 189, 248, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 90%, rgba(197, 160, 89, 0.05) 0%, transparent 40%);
}

#game-container > * {
    position: absolute;
}

/* HUD TOP */
#hud-top {
    top: 10px;
    left: 10px;
    right: 10px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    z-index: 100;
    pointer-events: none;
    flex-wrap: wrap;
    gap: 10px;
}

.hud-left {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    padding: 10px 15px;
    border-radius: 12px;
    pointer-events: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.city-name {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-gold);
    text-shadow: 0 0 10px rgba(197, 160, 89, 0.3);
}

.date-stat {
    font-size: 0.6rem;
    font-weight: 400;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-top: 3px;
    text-transform: uppercase;
}

#game-stats {
    display: flex;
    gap: 8px;
    pointer-events: auto;
    flex-wrap: wrap;
}

.stat-item {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    padding: 8px 12px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.stat-icon {
    font-size: 0.9rem;
}

.stat-item span:not(.stat-icon) {
    font-weight: 600;
    font-size: 0.85rem;
    font-variant-numeric: tabular-nums;
}

/* Demand Indicators */
#demand-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 60px;
    justify-content: center;
}

.demand-bar {
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.demand-bar::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--demand-val, 50%);
    border-radius: 2px;
    transition: width 0.5s ease-in-out;
}

.demand-bar.residential::after {
    background: var(--zone-res);
    box-shadow: 0 0 8px var(--zone-res);
}

.demand-bar.commercial::after {
    background: var(--zone-com);
    box-shadow: 0 0 8px var(--zone-com);
}

.demand-bar.industrial::after {
    background: var(--zone-ind);
    box-shadow: 0 0 8px var(--zone-ind);
}

/* MAIN VIEWPORT */
#viewport {
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    cursor: grab;
}

#viewport:active {
    cursor: grabbing;
}

#city-canvas {
    width: 100%;
    height: 100%;
    aspect-ratio: 1 / 1;
    display: block;
}

/* TOOLBAR BOTTOM */
#hud-bottom {
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    max-width: 100%;
    padding: 0 10px;
}

#toolbar {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    padding: 8px;
    border-radius: 20px;
    display: flex;
    gap: 6px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    overflow-x: auto;
    overflow-y: hidden;
    max-width: calc(100vw - 20px);
}

.tool-btn {
    background: transparent;
    border: none;
    padding: 10px 14px;
    border-radius: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    min-width: 60px;
    flex-shrink: 0;
}

.tool-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-4px);
}

.tool-btn.active {
    background: rgba(255, 255, 255, 0.1);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.btn-icon {
    font-size: 1.2rem;
}

.btn-label {
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.tool-btn.active .btn-label {
    color: var(--text-primary);
}

.tool-divider {
    width: 1px;
    background: var(--glass-border);
    margin: 5px;
}

.tool-btn.danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

.tool-btn.danger.active {
    background: rgba(239, 68, 68, 0.2);
    box-shadow: inset 0 0 0 1px rgba(239, 68, 68, 0.3);
}

/* Tooltip */
#tooltip {
    position: absolute;
    background: rgba(17, 24, 39, 0.75);
    color: #f3f4f6;
    padding: 8px 12px;
    border-radius: 8px;
    pointer-events: none;
    z-index: 50;
    font-size: 12px;
    line-height: 1.4;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    
    /* Bottom right positioning */
    bottom: 80px;
    right: 10px;
    top: auto !important;
    left: auto !important;
    
    transition: opacity 0.2s ease;
}

.hidden {
    opacity: 0;
}

#notification-area {
    position: absolute;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
    z-index: 50;
    max-width: calc(100% - 20px);
}

.notification {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--accent-gold);
    animation: slideUpFade 4s forwards;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

@keyframes slideUpFade {
    0% {
        transform: translateY(20px);
        opacity: 0;
    }

    10% {
        transform: translateY(0);
        opacity: 1;
    }

    90% {
        transform: translateY(0);
        opacity: 1;
    }

    100% {
        transform: translateY(-20px);
        opacity: 0;
    }
}

/* Mobile Layout */
@media (max-width: 768px) {
    #game-container {
        height: auto;
        padding-bottom: 0;
        display: flex;
        flex-direction: column;
        max-height: none;
    }
    
    #game-container > * {
        position: relative;
    }
    
    #hud-top {
        position: relative;
        top: 0;
        left: 0;
        right: 0;
        order: 1;
    }
    
    #viewport {
        position: relative;
        width: 100vw;
        height: 100vw;
        max-height: 70vh;
        order: 2;
        top: 0;
        left: 0;
        right: 0;
        bottom: auto;
    }
    
    #hud-bottom {
        position: relative;
        bottom: auto;
        left: 0;
        transform: none;
        order: 3;
        padding: 10px;
        max-width: 100%;
    }
    
    #toolbar {
        max-width: 100%;
    }
    
    #tooltip {
        bottom: auto;
        top: 10px;
        right: 10px;
    }
    
    #notification-area {
        top: 60px;
    }
}