:root {
    --neon-blue: #00e5ff;
    --neon-pink: #ff00e5;
    --neon-green: #39ff14;
    --neon-purple: #bc13fe;
    --cyber-yellow: #fff200;
    --deep-bg: #050510;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-main: 'Rajdhani', sans-serif;
    --font-ui: 'Orbitron', sans-serif;
}

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

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--deep-bg);
    color: white;
    font-family: var(--font-main);
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* --- HUD STYLES --- */
#hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: opacity 0.5s ease;
}

#hud.hidden { opacity: 0; }

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

.score-container {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-left: 4px solid var(--neon-blue);
    padding: 10px 20px;
    display: flex;
    flex-direction: column;
}

.label {
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--neon-blue);
    font-weight: 700;
}

#score-val {
    font-family: var(--font-ui);
    font-size: 1.8rem;
    font-weight: 900;
    text-shadow: 0 0 10px var(--neon-blue);
}

.coins-container {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-right: 4px solid var(--cyber-yellow);
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.coin-icon {
    width: 20px;
    height: 20px;
    background: var(--cyber-yellow);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--cyber-yellow);
}

#coins-val {
    font-family: var(--font-ui);
    font-size: 1.5rem;
    color: var(--cyber-yellow);
}

.hud-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.multiplier-container {
    font-family: var(--font-ui);
    font-size: 1.5rem;
    color: var(--neon-pink);
    text-shadow: 0 0 8px var(--neon-pink);
}

.icon-btn {
    width: 44px;
    height: 44px;
    background: var(--glass-bg);
    backdrop-filter: blur(5px);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: all;
    cursor: pointer;
    transition: all 0.2s;
}

.icon-btn:hover { background: rgba(255,255,255,0.15); }
.icon-btn svg { width: 24px; height: 24px; fill: white; }

/* --- SCREENS --- */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: opacity 0.5s, transform 0.5s;
}

.screen.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(1.05);
}

.overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, transparent 20%, var(--deep-bg) 95%);
    background-color: rgba(5, 5, 20, 0.85);
    backdrop-filter: blur(8px);
}

.overlay.crimson { background-color: rgba(30, 0, 10, 0.9); }
.overlay.blue { background-color: rgba(0, 5, 30, 0.9); }
.overlay.cyan { background-color: rgba(0, 25, 30, 0.95); }

.content {
    position: relative;
    z-index: 2;
    padding: 20px;
    max-width: 500px;
    width: 90%;
}

/* --- TITLES & GLOWS --- */
.title {
    font-family: var(--font-ui);
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 30px;
    letter-spacing: 4px;
}

.pink-glow { color: var(--neon-pink); text-shadow: 0 0 15px var(--neon-pink); }
.blue-glow { color: var(--neon-blue); text-shadow: 0 0 15px var(--neon-blue); }
.cyan-glow { color: var(--neon-blue); text-shadow: 0 0 20px var(--neon-blue); }

/* --- BRIEFING PANEL --- */
.briefing-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.instruction-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.icon-box {
    background: rgba(0, 229, 255, 0.1);
    border: 1px solid var(--neon-blue);
    color: var(--neon-blue);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    min-width: 100px;
    text-align: center;
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.2);
}

.instruction-item .text {
    font-family: var(--font-ui);
    font-size: 0.8rem;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.8);
}

.briefing-note {
    margin-top: 10px;
    padding-top: 15px;
    border-top: 1px solid var(--glass-border);
    color: var(--cyber-yellow);
    font-family: var(--font-ui);
    font-size: 0.7rem;
    text-align: center;
    letter-spacing: 2px;
}

/* --- LOGO --- */
.logo-container { margin-bottom: 50px; }
.logo-text {
    font-family: var(--font-ui);
    font-size: 4rem;
    font-weight: 900;
    line-height: 0.9;
    letter-spacing: -2px;
    color: white;
    position: relative;
    text-shadow: 0 0 20px var(--neon-blue);
}
.logo-text.sub {
    font-size: 5.5rem;
    color: var(--neon-pink);
    text-shadow: 0 0 20px var(--neon-pink);
}

/* --- BUTTONS --- */
.glitch-btn {
    background: white;
    color: black;
    border: none;
    padding: 15px 40px;
    font-family: var(--font-ui);
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: 2px;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
    box-shadow: 5px 0 0 var(--neon-blue), -5px 0 0 var(--neon-pink);
    margin: 20px 0;
    width: 100%;
}

.glitch-btn:hover {
    background: var(--neon-blue);
    color: white;
    box-shadow: 5px 0 0 var(--neon-pink), -5px 0 0 var(--neon-purple);
    transform: translateY(-2px);
}

.glitch-btn:active { transform: translateY(1px); }

.glitch-btn.cyan {
    box-shadow: 5px 0 0 var(--neon-blue), -5px 0 0 var(--neon-purple);
}

.glitch-btn.cyan:hover {
    box-shadow: 8px 0 0 #00ffff, -8px 0 0 var(--neon-pink);
}

.text-btn {
    background: transparent;
    border: none;
    color: rgba(255,255,255,0.6);
    font-family: var(--font-ui);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.8rem;
    cursor: pointer;
    padding: 10px;
}

.text-btn:hover { color: white; }

/* --- CONTROLS HINT --- */
.controls-hint {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.hint-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 0.7rem;
    color: rgba(255,255,255,0.5);
    font-family: var(--font-ui);
}

.key {
    background: rgba(255,255,255,0.1);
    border: 1px solid var(--glass-border);
    padding: 5px 10px;
    border-radius: 4px;
    color: white;
}

/* --- STATS PANEL --- */
.stats-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 30px;
    margin: 20px 0;
    text-align: left;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-family: var(--font-ui);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding-bottom: 8px;
}

.stat-row span:first-child { color: rgba(255,255,255,0.5); font-size: 0.8rem; }
.stat-row span:last-child { font-size: 1.4rem; font-weight: 700; }

#new-record {
    color: var(--neon-green);
    font-family: var(--font-ui);
    font-size: 0.8rem;
    text-align: center;
    margin-top: 10px;
    animation: flash 1s infinite alternate;
}

@keyframes flash {
    from { opacity: 0.3; }
    to { opacity: 1; text-shadow: 0 0 10px var(--neon-green); }
}

/* --- SETTINGS --- */
.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    font-family: var(--font-ui);
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px; width: 22px;
    left: 4px; bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider { background-color: var(--neon-blue); }
input:checked + .slider:before { transform: translateX(28px); }

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    .logo-text { font-size: 3.5rem; }
    .logo-text.sub { font-size: 4.5rem; }
    .title { font-size: 2.2rem; }
}

@media (max-width: 768px) {
    .logo-text { font-size: 3rem; }
    .logo-text.sub { font-size: 4rem; }
    .briefing-panel { padding: 25px; gap: 15px; }
    .stat-row span:last-child { font-size: 1.2rem; }
}

@media (max-width: 600px) {
    .logo-text { font-size: 2.5rem; }
    .logo-text.sub { font-size: 3.5rem; }
    #score-val { font-size: 1.4rem; }
    #coins-val { font-size: 1.2rem; }
    .glitch-btn { padding: 12px 20px; font-size: 1rem; }
    .title { font-size: 1.8rem; }
    .briefing-panel { padding: 20px; }
    .hud-top, .hud-bottom { padding: 10px; }
    .score-container, .coins-container { padding: 8px 15px; }
}

/* --- NEW ANIMATIONS --- */
@keyframes pulse-glow {
    0% { filter: drop-shadow(0 0 5px var(--neon-blue)); }
    100% { filter: drop-shadow(0 0 15px var(--neon-blue)); }
}

.pulse {
    animation: pulse-glow 2s infinite alternate ease-in-out;
}