:root {
    --bg-color: #050510;
    --neon-cyan: #00f3ff;
    --neon-purple: #bc13fe;
    --neon-green: #39ff14;
    --neon-pink: #ff007f;
    --glass-bg: rgba(10, 10, 25, 0.7);
    --glass-border: rgba(0, 243, 255, 0.2);
    --text-main: #e0e0ff;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--bg-color);
    font-family: 'Rajdhani', sans-serif;
    color: var(--text-main);
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at center, #101025 0%, #050510 100%);
}

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

/* Glassmorphism Panels */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 0 30px rgba(0, 243, 255, 0.1);
}

/* Screens */
.screen {
    position: absolute;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    min-width: 320px;
    max-width: 90%;
    text-align: center;
    transition: opacity 0.3s ease;
}

.screen.hidden {
    display: none !important;
}

/* Typography */
h1, h2 {
    font-family: 'Orbitron', sans-serif;
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.glitch-text {
    font-size: 3.5rem;
    color: #fff;
    text-shadow: 
        0 0 5px #fff,
        0 0 10px #fff,
        0 0 20px var(--neon-cyan),
        0 0 40px var(--neon-cyan),
        0 0 80px var(--neon-cyan);
    animation: pulsate 2s infinite alternate;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--neon-purple);
    letter-spacing: 5px;
    margin-bottom: 3rem;
    text-shadow: 0 0 10px var(--neon-purple);
}

.danger-text {
    color: var(--neon-pink);
    text-shadow: 0 0 15px var(--neon-pink);
    font-size: 2.5rem;
}

.neon-text {
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan);
}

.text-cyan {
    color: var(--neon-cyan);
}

/* Buttons */
.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
}

.neon-btn {
    font-family: 'Orbitron', sans-serif;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    background: transparent;
    border: 2px solid;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    overflow: hidden;
}

.neon-btn.primary {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.3), inset 0 0 15px rgba(0, 243, 255, 0.3);
}

.neon-btn.primary:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 30px var(--neon-cyan), inset 0 0 10px #fff;
}

.neon-btn.secondary {
    border-color: var(--neon-purple);
    color: var(--neon-purple);
    box-shadow: 0 0 10px rgba(188, 19, 254, 0.2);
}

.neon-btn.secondary:hover {
    background: var(--neon-purple);
    color: #fff;
    box-shadow: 0 0 20px var(--neon-purple);
}

.neon-btn.secondary.hover-danger:hover {
    background: var(--neon-pink);
    border-color: var(--neon-pink);
    box-shadow: 0 0 20px var(--neon-pink);
}

/* HUD */
#hud {
    position: absolute;
    top: 1rem;
    left: 1rem;
    right: 1rem;
    display: flex;
    justify-content: space-between;
    padding: 1rem;
    z-index: 5;
    pointer-events: none;
    border-radius: 12px;
    border: none;
    background: linear-gradient(180deg, rgba(5,5,16,0.9) 0%, rgba(5,5,16,0) 100%);
    box-shadow: none;
    backdrop-filter: none;
}

#hud.hidden {
    display: none !important;
}

.hud-top {
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.score-container {
    display: flex;
    flex-direction: column;
}

.score-container.right {
    align-items: flex-end;
}

.score-container .label {
    font-size: 0.9rem;
    color: #888;
    letter-spacing: 2px;
}

.score-container .value {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 0 10px var(--neon-cyan);
}

#btn-pause, #btn-fs {
    position: absolute;
    top: 1rem;
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    pointer-events: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

#btn-pause {
    left: 50%;
    transform: translateX(-50%);
}

#btn-fs {
    right: 1rem;
}

#btn-pause:hover, #btn-fs:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 15px var(--neon-cyan);
}

/* Combo UI */
.hud-center {
    position: absolute;
    top: 5rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

#combo-container.hidden {
    opacity: 0;
}

#combo-container {
    transition: opacity 0.3s;
}

#combo-text {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--neon-purple);
    text-shadow: 0 0 15px var(--neon-purple);
    font-style: italic;
}

.combo-bar-bg {
    width: 150px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    margin-top: 5px;
    overflow: hidden;
}

.combo-bar-fill {
    height: 100%;
    width: 100%;
    background: var(--neon-purple);
    box-shadow: 0 0 10px var(--neon-purple);
    transform-origin: left;
    transition: transform 0.1s linear;
}

/* Mobile Controls */
#mobile-controls {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
    opacity: 0.6;
}

#mobile-controls.hidden {
    display: none !important;
}

.d-pad {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.d-row {
    display: flex;
    gap: 50px;
}

.d-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    border: 2px solid rgba(255,255,255,0.2);
    color: white;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
}

.d-btn:active {
    background: rgba(0, 243, 255, 0.3);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-cyan);
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
    text-align: left;
    background: rgba(0,0,0,0.3);
    padding: 1.5rem;
    border-radius: 12px;
}

.result-box {
    display: flex;
    flex-direction: column;
}

.result-box .label {
    font-size: 0.8rem;
    color: #888;
}

.result-box .value {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    color: #fff;
}

/* Settings */
.settings-list {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
}

.toggle-btn {
    background: transparent;
    border: 1px solid #555;
    color: #888;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-family: 'Orbitron', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
}

.toggle-btn.active {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0,243,255,0.2);
}

/* Utilities */
.mt-4 { margin-top: 1rem; }
.animate-pulse { animation: pulse 1s infinite; }

@keyframes pulsate {
    100% {
        text-shadow:
        0 0 4px #fff,
        0 0 11px #fff,
        0 0 19px #fff,
        0 0 40px var(--neon-cyan),
        0 0 80px var(--neon-cyan),
        0 0 90px var(--neon-cyan),
        0 0 100px var(--neon-cyan),
        0 0 150px var(--neon-cyan);
    }
    0% {
        text-shadow:
        0 0 2px #fff,
        0 0 4px #fff,
        0 0 6px #fff,
        0 0 10px var(--neon-cyan),
        0 0 45px var(--neon-cyan),
        0 0 55px var(--neon-cyan),
        0 0 70px var(--neon-cyan),
        0 0 80px var(--neon-cyan);
    }
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

@media (max-width: 768px) {
    .glitch-text { font-size: 2.5rem; }
    .subtitle { font-size: 1rem; }
    .screen { padding: 1.5rem; width: 95%; }
    .results-grid { grid-template-columns: 1fr; gap: 1rem; }
}