/* ================================================
   LAB ESCAPE - Chemistry Infinite Runner
   Style.css - Neon Lab Aesthetic
   ================================================ */

/* CSS Variables */
:root {
    --primary-neon: #00ffcc;
    --secondary-neon: #ff00ff;
    --tertiary-neon: #ffff00;
    --accent-cyan: #00ccff;
    --accent-orange: #ff6600;
    --accent-green: #39ff14;
    --accent-purple: #bf00ff;
    --bg-dark: #0a0a12;
    --bg-darker: #050508;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #aaccff;
    --danger: #ff3366;
    --success: #00ff88;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Rajdhani', sans-serif;
    background: var(--bg-darker);
    color: var(--text-primary);
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

/* Game Container */
#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg-darker);
}

/* Background Layers */
.bg-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#bg-layer-1 {
    background: 
        linear-gradient(180deg, #0d0d1a 0%, #1a0d2e 50%, #0d1a2e 100%);
    z-index: 0;
}

#bg-layer-2 {
    background: 
        radial-gradient(ellipse 80% 50% at 50% 100%, rgba(0, 255, 204, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 20% 80%, rgba(191, 0, 255, 0.08) 0%, transparent 40%),
        radial-gradient(ellipse 60% 40% at 80% 70%, rgba(0, 204, 255, 0.08) 0%, transparent 40%);
    z-index: 1;
}

#bg-layer-3 {
    background: 
        repeating-linear-gradient(90deg, 
            transparent 0px, 
            transparent 100px, 
            rgba(0, 255, 204, 0.02) 100px, 
            rgba(0, 255, 204, 0.02) 101px);
    z-index: 2;
    animation: gridScroll 2s linear infinite;
}

@keyframes gridScroll {
    from { transform: translateX(0); }
    to { transform: translateX(-100px); }
}

/* Game Canvas */
#game-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
}

/* HUD */
#hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    z-index: 100;
    pointer-events: none;
}

#score-display,
#highscore-display,
#elements-display {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 10px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.hud-label {
    font-family: 'Orbitron', sans-serif;
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--primary-neon);
    text-shadow: 0 0 10px var(--primary-neon);
}

#score-value,
#highscore-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: 0 0 15px var(--primary-neon);
}

#elements-display {
    flex-direction: row;
    gap: 10px;
}

#elements-icons {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
    max-width: 150px;
    justify-content: center;
}

.element-icon {
    font-size: 18px;
    animation: elementPulse 1.5s ease-in-out infinite;
}

@keyframes elementPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

#powerup-display {
    display: flex;
    gap: 10px;
}

.powerup-indicator {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.powerup-indicator.active {
    border-color: var(--primary-neon);
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.3);
}

.powerup-indicator.hidden {
    opacity: 0;
    transform: translateX(20px);
}

.powerup-icon {
    font-size: 20px;
}

.powerup-timer {
    font-family: 'Orbitron', sans-serif;
    font-size: 12px;
    color: var(--primary-neon);
}

/* Screens */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.screen.active {
    opacity: 1;
    visibility: visible;
}

.screen-content {
    text-align: center;
    padding: 40px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: 
        0 0 60px rgba(0, 255, 204, 0.1),
        inset 0 0 60px rgba(0, 255, 204, 0.05);
    max-width: 90%;
    width: 450px;
}

/* Start Screen */
.game-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 10px;
}

.title-text {
    font-family: 'Orbitron', sans-serif;
    font-size: 64px;
    font-weight: 900;
    letter-spacing: 8px;
    background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    filter: drop-shadow(0 0 30px rgba(0, 255, 204, 0.5));
}

.title-sub {
    font-family: 'Orbitron', sans-serif;
    font-size: 36px;
    font-weight: 700;
    letter-spacing: 20px;
    color: var(--accent-cyan);
    text-shadow: 0 0 20px var(--accent-cyan);
    margin-left: 20px;
}

.game-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    letter-spacing: 3px;
}

/* Decorative Flask */
.decorative-flask {
    width: 80px;
    height: 100px;
    margin: 30px auto;
    position: relative;
}

.flask {
    width: 100%;
    height: 100%;
    position: relative;
}

.flask::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 30px;
    background: transparent;
    border: 3px solid var(--primary-neon);
    border-bottom: none;
    border-radius: 3px 3px 0 0;
}

.flask::after {
    content: '';
    position: absolute;
    top: 25px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 60px;
    background: linear-gradient(180deg, 
        transparent 0%, 
        rgba(0, 255, 204, 0.3) 30%, 
        rgba(191, 0, 255, 0.4) 70%, 
        rgba(0, 255, 204, 0.3) 100%);
    border: 3px solid var(--primary-neon);
    border-radius: 0 0 25px 25px;
    box-shadow: 
        0 0 20px var(--primary-neon),
        inset 0 0 20px rgba(191, 0, 255, 0.3);
    animation: flaskGlow 2s ease-in-out infinite;
}

@keyframes flaskGlow {
    0%, 100% { box-shadow: 0 0 20px var(--primary-neon), inset 0 0 20px rgba(191, 0, 255, 0.3); }
    50% { box-shadow: 0 0 40px var(--primary-neon), inset 0 0 30px rgba(191, 0, 255, 0.5); }
}

.flask-liquid {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 44px;
    height: 40px;
    background: linear-gradient(180deg, var(--secondary-neon), var(--primary-neon));
    border-radius: 0 0 22px 22px;
    opacity: 0.8;
    animation: liquidWobble 3s ease-in-out infinite;
}

@keyframes liquidWobble {
    0%, 100% { transform: translateX(-50%) scaleY(1); }
    25% { transform: translateX(-50%) scaleY(1.1); }
    75% { transform: translateX(-50%) scaleY(0.9); }
}

.flask-bubbles {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
}

.flask-bubbles::before,
.flask-bubbles::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--primary-neon);
    border-radius: 50%;
    animation: bubble 2s ease-in-out infinite;
}

.flask-bubbles::before {
    left: 5px;
    animation-delay: 0s;
}

.flask-bubbles::after {
    right: 5px;
    animation-delay: 1s;
}

@keyframes bubble {
    0% { transform: translateY(0) scale(1); opacity: 1; }
    100% { transform: translateY(-20px) scale(0.5); opacity: 0; }
}

/* Controls Info */
.controls-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.control-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.key {
    font-family: 'Orbitron', sans-serif;
    font-size: 14px;
    padding: 8px 12px;
    background: rgba(0, 255, 204, 0.1);
    border: 1px solid var(--primary-neon);
    border-radius: 6px;
    color: var(--primary-neon);
}

.action {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Game Buttons */
.game-btn {
    font-family: 'Orbitron', sans-serif;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 3px;
    padding: 15px 40px;
    background: linear-gradient(135deg, var(--primary-neon), var(--accent-cyan));
    border: none;
    border-radius: 50px;
    color: var(--bg-dark);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 30px rgba(0, 255, 204, 0.4);
    margin: 10px;
}

.game-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 50px rgba(0, 255, 204, 0.6);
}

.game-btn:active {
    transform: scale(0.98);
}

.game-btn.secondary {
    background: transparent;
    border: 2px solid var(--secondary-neon);
    color: var(--secondary-neon);
    box-shadow: 0 0 20px rgba(255, 0, 255, 0.3);
}

.game-btn.secondary:hover {
    box-shadow: 0 0 30px rgba(255, 0, 255, 0.5);
}

/* Game Over Screen */
.gameover-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 42px;
    font-weight: 900;
    letter-spacing: 5px;
    color: var(--danger);
    text-shadow: 0 0 30px var(--danger);
    margin-bottom: 30px;
}

.final-stats {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: var(--glass-bg);
    border-radius: 10px;
    border: 1px solid var(--glass-border);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.stat-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-neon);
    text-shadow: 0 0 10px var(--primary-neon);
}

.collected-elements {
    margin: 20px 0;
    padding: 15px;
    background: var(--glass-bg);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.elements-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

#final-elements-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.final-element {
    font-size: 24px;
    padding: 8px;
    background: var(--glass-bg);
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    animation: elementAppear 0.5s ease-out;
}

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

/* Pause Screen */
.pause-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 42px;
    font-weight: 900;
    letter-spacing: 5px;
    color: var(--tertiary-neon);
    text-shadow: 0 0 30px var(--tertiary-neon);
    margin-bottom: 30px;
}

/* Mobile Controls Hint */
@media (max-width: 768px) {
    .title-text {
        font-size: 42px;
        letter-spacing: 4px;
    }
    
    .title-sub {
        font-size: 24px;
        letter-spacing: 10px;
        margin-left: 10px;
    }
    
    .screen-content {
        padding: 25px;
    }
    
    .game-btn {
        font-size: 14px;
        padding: 12px 30px;
    }
    
    #hud {
        padding: 10px;
    }
    
    .hud-label {
        font-size: 8px;
    }
    
    #score-value,
    #highscore-value {
        font-size: 18px;
    }
    
    .controls-info {
        gap: 10px;
    }
    
    .key {
        font-size: 11px;
        padding: 6px 8px;
    }
}

/* Touch Controls Overlay (Mobile) */
#touch-controls {
    position: absolute;
    bottom: 20px;
    left: 0;
    width: 100%;
    height: 150px;
    z-index: 50;
    display: none;
    pointer-events: auto;
}

@media (hover: none) and (pointer: coarse) {
    #touch-controls {
        display: flex;
    }
    
    .controls-info {
        display: none;
    }
}

.touch-zone {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.2s;
}

.touch-zone:active {
    opacity: 1;
    background: rgba(0, 255, 204, 0.1);
}

.touch-icon {
    font-size: 40px;
    color: var(--primary-neon);
    text-shadow: 0 0 20px var(--primary-neon);
}

/* Loading State */
.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'Orbitron', sans-serif;
    font-size: 18px;
    color: var(--primary-neon);
    text-shadow: 0 0 20px var(--primary-neon);
    animation: loadingPulse 1.5s ease-in-out infinite;
}

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

/* Scanlines Effect (Retro Feel) */
#game-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent 0px,
        transparent 2px,
        rgba(0, 0, 0, 0.03) 2px,
        rgba(0, 0, 0, 0.03) 4px
    );
    pointer-events: none;
    z-index: 1000;
}