/* Reset and Root Variables */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-drag: none;
}

:root {
    --bg-color: #0b0c10;
    --panel-bg: rgba(15, 17, 26, 0.82);
    --border-color: rgba(255, 255, 255, 0.07);
    --text-primary: #f0f2f5;
    --text-secondary: #9aa0a6;
    
    /* Neon Player Colors */
    --p1-color: #00f0ff;
    --p1-glow: rgba(0, 240, 255, 0.35);
    --p2-color: #ff0055;
    --p2-glow: rgba(255, 0, 85, 0.35);
    --p3-color: #39ff14;
    --p3-glow: rgba(57, 255, 20, 0.35);
    
    --accent-gold: #ffb700;
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(rgba(255, 255, 255, 0.007) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.007) 1px, transparent 1px);
    background-size: 80px 80px, 80px 80px, 16px 16px, 16px 16px;
    background-position: center;
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow: hidden;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Container */
#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Glassmorphism Panel Utility */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
}

/* Main Menu Overlay */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    display: none;
    justify-content: center;
    align-items: center;
    background: rgba(5, 6, 10, 0.85);
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.overlay.active {
    display: flex;
}

.menu-content {
    width: 90%;
    max-width: 680px;
    padding: 40px;
    text-align: center;
    animation: zoomIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    max-height: 95vh;
    overflow-y: auto;
}

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.92); }
    to { opacity: 1; transform: scale(1); }
}

/* Logo Design */
.logo-container {
    margin-bottom: 12px;
}
.logo-text-accent {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 900;
    letter-spacing: 0.6rem;
    color: var(--accent-gold);
    display: block;
    margin-left: 0.6rem;
    text-shadow: 0 0 10px rgba(255, 183, 0, 0.2);
}
.logo-text {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: 0.2rem;
    background: linear-gradient(135deg, #ffffff 30%, #a2b0c2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 10px rgba(255, 255, 255, 0.1));
}
.logo-subtext {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.4rem;
    color: var(--p1-color);
    text-shadow: 0 0 8px var(--p1-glow);
}

.menu-tagline {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-weight: 300;
}

/* Mode Buttons */
.menu-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 25px;
}

.menu-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 18px 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.menu-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.menu-btn.active {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--p1-color);
    color: #ffffff;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
}

/* Style for P2/P3 buttons active states specifically */
.menu-options button:nth-child(2).active {
    background: rgba(255, 0, 85, 0.08);
    border-color: var(--p2-color);
    box-shadow: 0 0 20px rgba(255, 0, 85, 0.15);
}
.menu-options button:nth-child(3).active {
    background: rgba(57, 255, 20, 0.08);
    border-color: var(--p3-color);
    box-shadow: 0 0 20px rgba(57, 255, 20, 0.15);
}

.btn-icon {
    font-size: 1.8rem;
}
.btn-label {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
}
.btn-sub {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Settings */
.settings-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 12px;
    padding: 14px 20px;
    margin-bottom: 25px;
}

.setting-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.custom-select {
    background: #121420;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 6px;
    font-family: var(--font-body);
    cursor: pointer;
    outline: none;
}

.checkbox-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--p1-color);
}

/* Action Start Button */
.start-action-btn {
    width: 100%;
    padding: 16px;
    border-radius: 12px;
    background: linear-gradient(135deg, #00f0ff 0%, #0072ff 100%);
    border: none;
    color: #ffffff;
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 900;
    letter-spacing: 0.15rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.25);
    margin-bottom: 25px;
}

.start-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 240, 255, 0.45);
    filter: brightness(1.1);
}

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

/* Controls Guide */
.controls-guide h3 {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    color: var(--text-secondary);
    letter-spacing: 0.2rem;
    margin-bottom: 12px;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.control-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 10px;
    padding: 12px 6px;
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.player-indicator {
    font-weight: 700;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    margin-bottom: 4px;
}
.p1-color { color: var(--p1-color); }
.p2-color { color: var(--p2-color); }
.p3-color { color: var(--p3-color); }

.keys {
    display: flex;
    gap: 4px;
    justify-content: center;
    min-height: 24px;
    align-items: center;
}

.key {
    background: rgba(255, 255, 255, 0.08);
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    padding: 3px 6px;
    font-family: monospace;
    font-size: 0.75rem;
    font-weight: 700;
    color: #ffffff;
    min-width: 20px;
    text-align: center;
}

.action-keys {
    color: var(--text-secondary);
    font-size: 0.72rem;
    line-height: 1.3;
}

.mouse-icon {
    font-size: 0.9rem;
}

/* Heads Up Display (HUD) Panel */
.hud-panel {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 850px;
    height: 64px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    z-index: 50;
    border-radius: 12px;
}

.hud-left, .hud-right {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 20%;
}

.hud-right {
    justify-content: flex-end;
}

.hud-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.hud-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.hud-btn:active {
    transform: scale(0.96);
}

/* Scoreboard */
.scoreboard {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: center;
    width: 60%;
}

.score-slot {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.04);
    padding: 6px 14px;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    transition: all 0.3s ease;
    opacity: 0.4;
}

.score-slot.active {
    opacity: 1;
    border-color: rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.4);
}

.score-color-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.p1-bg { background-color: var(--p1-color); box-shadow: 0 0 6px var(--p1-color); }
.p2-bg { background-color: var(--p2-color); box-shadow: 0 0 6px var(--p2-color); }
.p3-bg { background-color: var(--p3-color); box-shadow: 0 0 6px var(--p3-color); }

.score-name {
    color: var(--text-secondary);
    font-weight: 400;
}

.score-num {
    color: #ffffff;
    font-weight: 900;
    font-size: 1.1rem;
    margin-left: 2px;
}

/* Powerup indicator */
.active-powerup-icon {
    font-size: 1.05rem;
    min-width: 20px;
    text-align: center;
}

.current-round {
    font-family: var(--font-heading);
    color: var(--accent-gold);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.05rem;
}

/* Canvas Element styling */
#game-canvas {
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
    background: #0f111a;
    border: 1px solid rgba(255, 255, 255, 0.06);
    display: block;
    max-width: 95vw;
    max-height: calc(100vh - 120px);
    margin-top: 50px;
    transition: box-shadow 0.1s ease;
}

/* Banner Overlay */
.banner-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    z-index: 80;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(11, 12, 16, 0.9);
    border: 2px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 100px rgba(0, 0, 0, 0.9);
    padding: 30px 80px;
    border-radius: 20px;
    backdrop-filter: blur(12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s cubic-bezier(0.19, 1, 0.22, 1);
}

.banner-overlay.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.banner-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: 0.3rem;
    text-shadow: 0 0 25px rgba(255, 255, 255, 0.2);
    margin-bottom: 8px;
    animation: textPulse 1.5s infinite alternate;
}

.banner-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 0.1rem;
}

@keyframes textPulse {
    from { transform: scale(1); }
    to { transform: scale(1.03); }
}

/* Responsive adjustments */
@media (max-width: 680px) {
    .menu-options {
        grid-template-columns: 1fr;
    }
    .controls-grid {
        grid-template-columns: 1fr;
    }
    .menu-content {
        padding: 24px;
    }
    .logo-text {
        font-size: 2.5rem;
    }
    .hud-panel {
        flex-direction: column;
        height: auto;
        padding: 10px;
        gap: 10px;
    }
    .hud-left, .hud-right, .scoreboard {
        width: 100%;
        justify-content: center;
    }
    #game-canvas {
        margin-top: 130px;
        max-height: calc(100vh - 190px);
    }
}