:root {
    --bg: #050510;
    --accent: #2ecc71; /* Tactical Green */
    --accent-blue: #00d2ff;
    --accent-red: #ff3e3e;
    --accent-gold: #ffcc00;
    --text: #ffffff;
    --glass: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Rajdhani', sans-serif;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
}

/* --- HUD Styling --- */
#hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

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

.base-health {
    width: 250px;
    padding: 15px;
    background: rgba(0,0,0,0.6);
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
    border-radius: 5px;
    transform: skewX(-15deg);
    pointer-events: none;
}

.hp-label { font-size: 0.8rem; font-weight: 700; letter-spacing: 2px; color: var(--accent-red); opacity: 0.7; }
.hp-bar-outer { width: 100%; height: 6px; background: rgba(255,255,255,0.1); margin: 5px 0; overflow: hidden; }
#hp-bar-fill { width: 100%; height: 100%; background: linear-gradient(90deg, #fff, var(--accent-red)); transition: width 0.3s; }
.hp-value { font-size: 1.2rem; font-weight: 900; color: white; text-align: right; }

.wave-info {
    text-align: center;
    background: rgba(255,255,255,0.05);
    padding: 10px 40px;
    border-radius: 40px;
    border: 1px solid var(--border);
    backdrop-filter: blur(5px);
}

#wave-text { font-size: 1.5rem; font-weight: 900; font-family: 'Orbitron', sans-serif; color: var(--accent-gold); letter-spacing: 3px; }
.timer-box { font-size: 0.8rem; font-weight: 700; opacity: 0.8; color: white; }

.resource-info {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(0,0,0,0.6);
    padding: 10px 30px;
    border: 1px solid var(--accent-gold);
    border-radius: 40px;
    transform: skewX(15deg);
}

.gold-icon { font-size: 1.5rem; }
#gold-value { font-size: 2rem; font-weight: 900; font-family: 'Orbitron', sans-serif; color: var(--accent-gold); }

/* --- Tower Build Dock --- */
#tower-dock {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    pointer-events: auto;
}

.tower-btn {
    width: 80px;
    height: 100px;
    background: rgba(20,20,30,0.8);
    backdrop-filter: blur(10px);
    border: 2px solid var(--border);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.tower-btn:hover, .tower-btn.active {
    border-color: var(--accent-blue);
    transform: translateY(-10px);
    box-shadow: 0 0 20px var(--accent-blue);
}

.tower-btn .icon { font-size: 2rem; }
.tower-btn .label { font-size: 0.6rem; font-weight: 900; letter-spacing: 1px; color: var(--accent-blue); }
.tower-btn .cost { font-size: 1rem; font-weight: 900; color: var(--accent-gold); }

#tower-dock[data-disabled="true"] .tower-btn {
    filter: grayscale(1);
    opacity: 0.5;
    pointer-events: none;
}

/* --- Mobile Controls --- */
#mobile-controls {
    position: absolute;
    bottom: 160px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 30px;
    pointer-events: auto;
}

.action-btn {
    padding: 15px 40px;
    border: none;
    border-radius: 40px;
    font-weight: 900;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
    transition: all 0.2s;
}

.confirm { background: var(--accent); color: white; }
.cancel { background: var(--accent-red); color: white; }
.action-btn:active { transform: scale(0.9); }

/* --- Overlays --- */
.overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle, transparent 20%, rgba(0,0,0,0.9) 100%);
    display: flex; justify-content: center; align-items: center;
    z-index: 1000;
}

.glass-box {
    background: rgba(20,20,30,0.9);
    backdrop-filter: blur(20px);
    padding: 60px;
    border: 2px solid var(--border);
    border-radius: 10px;
    text-align: center;
    max-width: 600px;
}

.logo { font-size: 4rem; font-weight: 900; color: white; letter-spacing: 5px; font-family: 'Orbitron', sans-serif; }
.logo .sub { color: var(--accent-blue); display: block; font-size: 2.5rem; margin-top: -10px; }

#start-btn {
    margin-top: 40px; padding: 20px 60px; background: var(--accent-blue); border: none; color: black;
    font-size: 1.5rem; font-weight: 900; cursor: pointer; clip-path: polygon(10% 0%, 100% 0%, 90% 100%, 0% 100%);
    transition: transform 0.2s, box-shadow 0.2s;
}

#start-btn:hover { transform: scale(1.1); box-shadow: 0 0 30px var(--accent-blue); }

.hidden { display: none !important; }

/* --- Notif Center --- */
#notif-center {
    position: absolute;
    top: 120px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
}

.notif {
    background: rgba(255, 62, 62, 0.8);
    color: white;
    padding: 10px 30px;
    border-radius: 5px;
    font-weight: 900;
    margin-bottom: 5px;
    animation: fadeInOut 2s forwards;
}

@keyframes fadeInOut {
    0% { opacity: 0; transform: translateY(-20px); }
    10% { opacity: 1; transform: translateY(0); }
    90% { opacity: 1; }
    100% { opacity: 0; transform: translateY(20px); }
}

/* --- Media Queries --- */
@media screen and (max-width: 768px) {
    #tower-dock { gap: 10px; width: 90%; justify-content: center; }
    .tower-btn { width: 70px; height: 90px; }
    .logo { font-size: 2.5rem; }
    .logo .sub { font-size: 1.5rem; }
    .hud-top { padding-top: 10px; }
}