/* Base & Resets */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Orbitron', sans-serif;
    user-select: none;
    -webkit-user-select: none;
}

body, html {
    width: 100%;
    height: 100%;
    background-color: #030308;
    overflow: hidden;
    color: #fff;
}

/* Deep Space Animated Gradient */
.bg-animation {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at center, #110820 0%, #030308 100%);
    z-index: -1;
}

/* Game Container */
#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    /* Removed CSS shake in favor of Canvas translation shake for better performance */
}

/* UI Panels (Polished Glassmorphism) */
.glass-panel {
    position: absolute;
    z-index: 10;
    background: rgba(8, 8, 18, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(0, 243, 255, 0.4);
    border-radius: 8px;
    padding: 50px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), inset 0 0 20px rgba(0, 243, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: center;
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.glass-panel.hidden {
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
    display: flex !important; /* Keep flex but hide via opacity/transform for smooth fade */
    visibility: hidden;
}

/* Typography & Glows */
h1 {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: 4px;
    text-shadow: 0 0 15px rgba(0, 243, 255, 0.8), 0 0 30px rgba(0, 243, 255, 0.4);
    margin-bottom: 5px;
}

.subtitle {
    color: #a0a0ff;
    font-size: 1.1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.controls-info {
    background: rgba(255,255,255,0.05);
    padding: 15px 25px;
    border-radius: 6px;
    font-size: 0.9rem;
    color: #ccc;
    border: 1px dashed rgba(255,255,255,0.2);
}

.controls-info span {
    color: #00f3ff;
    font-weight: bold;
}

.neon-red {
    color: #ff0055;
    text-shadow: 0 0 15px #ff0055, 0 0 30px #ff0055;
}

.neon-blue {
    color: #00f3ff;
    text-shadow: 0 0 15px #00f3ff, 0 0 30px #00f3ff;
}

/* Polished Buttons */
.cyber-btn {
    background: rgba(0, 243, 255, 0.05);
    color: #00f3ff;
    font-size: 1.2rem;
    font-weight: bold;
    padding: 15px 40px;
    border: 2px solid #00f3ff;
    border-radius: 4px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 3px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.2), inset 0 0 10px rgba(0, 243, 255, 0.1);
}

.cyber-btn:hover {
    background: #00f3ff;
    color: #030308;
    box-shadow: 0 0 25px #00f3ff, inset 0 0 15px #fff;
    transform: translateY(-2px);
}

.pulse-btn {
    animation: buttonPulse 2s infinite;
}

@keyframes buttonPulse {
    0% { box-shadow: 0 0 15px rgba(0, 243, 255, 0.2); }
    50% { box-shadow: 0 0 30px rgba(0, 243, 255, 0.6); }
    100% { box-shadow: 0 0 15px rgba(0, 243, 255, 0.2); }
}

.small-btn {
    font-size: 0.8rem;
    padding: 8px 20px;
    letter-spacing: 1px;
}

/* Professional HUD */
#hud {
    position: absolute;
    top: 0; left: 0; width: 100%;
    padding: 25px 30px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    z-index: 5;
    pointer-events: none;
}

#pause-btn {
    pointer-events: auto;
    margin-top: -5px;
}

.hud-left {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.score-box {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 1px;
}

.score-box span {
    color: #00f3ff;
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.5);
}

/* Combo Styling */
#combo-container {
    margin-top: 10px;
    font-size: 1rem;
    color: #888;
    transition: all 0.2s ease;
}

#combo-container span {
    color: #888;
    text-shadow: none;
}

#combo-container.combo-active {
    font-size: 1.5rem;
    color: #fff;
    animation: comboPop 0.3s ease-out;
}

#combo-container.combo-active span {
    color: #ff00ff;
    text-shadow: 0 0 15px #ff00ff, 0 0 30px #ff00ff;
}

@keyframes comboPop {
    0% { transform: scale(1); }
    50% { transform: scale(1.4); }
    100% { transform: scale(1); }
}

/* Slanted Health Bar */
.health-bar-container {
    width: 250px;
    height: 22px;
    background: rgba(255, 0, 85, 0.15);
    border: 2px solid rgba(255, 0, 85, 0.5);
    transform: skew(-20deg);
    overflow: hidden;
    box-shadow: 0 0 15px rgba(255, 0, 85, 0.2);
}

#health-bar {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, #aa0033, #ff0055);
    box-shadow: 0 0 15px #ff0055;
    transition: width 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Mobile Controls (Polished Joystick Feel) */
#mobile-controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
    opacity: 0.6;
    transition: opacity 0.2s;
}

#mobile-controls:active {
    opacity: 1;
}

.d-pad {
    display: grid;
    grid-template-columns: 70px 70px 70px;
    grid-template-rows: 70px 70px 70px;
    gap: 8px;
}

.d-btn {
    background: rgba(0, 243, 255, 0.1);
    border: 2px solid rgba(0, 243, 255, 0.3);
    color: #00f3ff;
    border-radius: 50%;
    font-size: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
    box-shadow: inset 0 0 10px rgba(0,243,255,0.1);
}

.d-btn:active {
    background: rgba(0, 243, 255, 0.4);
    transform: scale(0.95);
    box-shadow: 0 0 15px #00f3ff;
}

.up { grid-column: 2; grid-row: 1; }
.left { grid-column: 1; grid-row: 2; }
.right { grid-column: 3; grid-row: 2; }
.down { grid-column: 2; grid-row: 3; }

@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    .glass-panel { padding: 30px 20px; width: 90%; }
    .health-bar-container { width: 120px; }
    #hud { padding: 15px; }
}