:root {
    --primary-neon: #38bdf8;
    --secondary-neon: #39c5bb;
    --danger-neon: #f43f5e;
    --gold-neon: #fbbf24;
    --bg-dark: rgba(11, 12, 16, 0.85);
    --glass-bg: rgba(255, 255, 255, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
}

body {
    font-family: 'Prompt', sans-serif;
    background-color: #05080a;
    color: white;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

#game-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 2rem;
}

#ui-layer * {
    pointer-events: auto;
}

/* HUD Top */
.hud-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.stat-box {
    background: var(--bg-dark);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(56, 189, 248, 0.3);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    min-width: 150px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.stat-box .label {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.7rem;
    color: var(--primary-neon);
    letter-spacing: 2px;
    margin-bottom: 0.2rem;
}

.stat-box .value {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
}

.block-info {
    border-color: var(--secondary-neon);
}

.block-info .label {
    color: var(--secondary-neon);
}

/* HUD Bottom */
.hud-bottom {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 2rem;
}

.tower-selector {
    display: flex;
    gap: 1rem;
    background: var(--bg-dark);
    padding: 0.5rem;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tower-btn {
    width: 70px;
    height: 90px;
    background: var(--glass-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: white;
}

.tower-btn:hover {
    background: rgba(56, 189, 248, 0.15);
    border-color: var(--primary-neon);
}

.tower-btn.active {
    background: rgba(56, 189, 248, 0.25);
    border-color: var(--primary-neon);
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
}

.tower-btn .icon {
    font-size: 1.8rem;
    margin-bottom: 0.3rem;
}

.tower-btn .price {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--gold-neon);
}

/* Main Button */
.main-btn {
    padding: 1.2rem 3rem;
    background: linear-gradient(135deg, #38bdf8 0%, #39c5bb 100%);
    border: none;
    border-radius: 40px;
    color: white;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 2px;
    cursor: pointer;
    box-shadow: 0 0 25px rgba(56, 189, 248, 0.5);
    transition: all 0.3s ease;
}

.main-btn:hover {
    transform: scale(1.05) translateY(-3px);
    box-shadow: 0 0 40px rgba(56, 189, 248, 0.7);
}

/* Overlays */
#msg-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

#msg-overlay h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 5rem;
    letter-spacing: 10px;
    text-shadow: 0 0 30px var(--primary-neon);
    animation: pulse 2s infinite;
}

.hidden {
    opacity: 0;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.8;
    }

    50% {
        transform: scale(1.1);
        opacity: 1;
    }

    100% {
        transform: scale(1);
        opacity: 0.8;
    }
}