:root {
    --bg-base: #0a0a16;
    --neon-blue: #00f3ff;
    --neon-purple: #9d00ff;
    --neon-pink: #ff007f;
    --neon-green: #00ffcc;
    --neon-yellow: #fbf236;
    --neon-red: #ff2a2a;
    --glass-bg: rgba(10, 10, 22, 0.7);
    --glass-border: rgba(0, 243, 255, 0.3);
    --font-main: 'Orbitron', sans-serif;
}

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

body {
    background-color: #000;
    color: #fff;
    font-family: var(--font-main);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#game-container {
    position: relative;
    width: 100%;
    max-width: 1280px;
    height: 100%;
    max-height: 720px;
    background: radial-gradient(circle at 50% 100%, #1a103c 0%, var(--bg-base) 100%);
    overflow: hidden;
    box-shadow: 0 0 40px rgba(157, 0, 255, 0.2);
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* UI Layer */
#ui-layer {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none;
    z-index: 10;
    padding: 30px;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    font-size: 16px;
    letter-spacing: 2px;
}

@media (max-width: 600px) {
    .top-bar {
        font-size: 12px;
        flex-direction: column;
        gap: 10px;
    }
}

.stat-box {
    background: rgba(0,0,0,0.5);
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(5px);
    display: flex;
    gap: 15px;
    align-items: center;
}

.text-glow-blue { color: var(--neon-blue); text-shadow: 0 0 10px var(--neon-blue); }
.text-glow-green { color: var(--neon-green); text-shadow: 0 0 10px var(--neon-green); }
.text-glow-yellow { color: var(--neon-yellow); text-shadow: 0 0 10px var(--neon-yellow); }
.text-glow-red { color: var(--neon-red); text-shadow: 0 0 15px var(--neon-red), 0 0 30px var(--neon-red); }

.powerups-container {
    position: absolute;
    top: 100px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: flex-end;
}

.powerup-icon {
    background: rgba(0,0,0,0.6);
    border: 1px solid var(--neon-purple);
    border-radius: 4px;
    padding: 8px 15px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 15px;
    backdrop-filter: blur(4px);
    box-shadow: 0 0 10px rgba(157,0,255,0.3);
}

.powerup-bar {
    width: 80px;
    height: 6px;
    background: #222;
    border-radius: 3px;
    overflow: hidden;
}

.powerup-fill {
    height: 100%;
    background: var(--neon-blue);
    box-shadow: 0 0 5px var(--neon-blue);
    transition: width 0.1s linear;
}

/* Screens */
.screen {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 20;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    text-align: center;
    padding: 20px;
}

.screen.active {
    opacity: 1;
    pointer-events: auto;
}

.glass-panel {
    background: radial-gradient(circle, rgba(10,10,22,0.8) 0%, rgba(5,5,10,0.95) 100%);
    backdrop-filter: blur(10px);
}

.glow-title {
    font-size: 80px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 30px;
    background: linear-gradient(180deg, #fff 0%, var(--neon-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 20px rgba(0,243,255,0.5));
    letter-spacing: 5px;
}

@media (max-width: 600px) { .glow-title { font-size: 48px; } }

.blink {
    animation: blink 1.5s infinite alternate;
    margin-bottom: 50px;
    font-size: 16px;
    letter-spacing: 3px;
    color: var(--neon-blue);
}

@keyframes blink {
    0% { opacity: 1; text-shadow: 0 0 10px var(--neon-blue); }
    100% { opacity: 0.3; text-shadow: none; }
}

.btn-group {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.btn {
    font-family: var(--font-main);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 2px;
    padding: 20px 40px;
    background: rgba(0, 243, 255, 0.1);
    border: 2px solid var(--neon-blue);
    color: var(--neon-blue);
    cursor: pointer;
    text-transform: uppercase;
    border-radius: 4px;
    transition: all 0.2s;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.2) inset, 0 0 15px rgba(0, 243, 255, 0.2);
}

.btn:hover {
    background: var(--neon-blue);
    color: #000;
    box-shadow: 0 0 30px rgba(0, 243, 255, 0.6) inset, 0 0 30px rgba(0, 243, 255, 0.6);
}

.btn:active {
    transform: scale(0.95);
}

.results-box {
    background: rgba(0,0,0,0.6);
    border: 1px solid var(--neon-pink);
    border-radius: 12px;
    padding: 40px 60px;
    margin-bottom: 40px;
    font-size: 18px;
    line-height: 2;
    box-shadow: 0 0 30px rgba(255, 0, 127, 0.2);
}

.big-score {
    font-size: 48px;
    font-weight: 900;
    margin: 10px 0 20px 0;
}

.tips {
    margin-top: 60px;
    font-size: 12px;
    color: #888;
    max-width: 400px;
    line-height: 1.8;
}

/* Shake Effect for taking damage */
.shake {
    animation: screenshake 0.2s cubic-bezier(.36,.07,.19,.97) both;
}
@keyframes screenshake {
    0% { transform: translate(0, 0); }
    20% { transform: translate(-10px, 8px); }
    40% { transform: translate(10px, -8px); }
    60% { transform: translate(-10px, -8px); }
    80% { transform: translate(10px, 8px); }
    100% { transform: translate(0, 0); }
}