/* VOID SURVIVOR - Cyberpunk Neon Aesthetic */

:root {
    --bg-dark: #0a0a0f;
    --bg-darker: #050508;
    --neon-cyan: #00ffff;
    --neon-magenta: #ff00ff;
    --neon-yellow: #ffff00;
    --neon-green: #00ff88;
    --neon-red: #ff3366;
    --neon-orange: #ff8800;
    --text-primary: #ffffff;
    --text-secondary: #88889a;
    --glass-bg: rgba(10, 10, 20, 0.85);
    --glass-border: rgba(0, 255, 255, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    overflow: hidden;
    background: var(--bg-darker);
    font-family: 'Rajdhani', sans-serif;
    color: var(--text-primary);
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

#game-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* ============ HUD ============ */
#hud {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    pointer-events: none;
    z-index: 100;
}

#health-container,
#xp-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

#health-label,
#xp-label {
    font-family: 'Orbitron', monospace;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-secondary);
}

#health-bar,
#xp-bar {
    width: 200px;
    height: 8px;
    background: var(--bg-darker);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

#health-bar::before,
#xp-bar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

#health-fill {
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, var(--neon-red), var(--neon-orange));
    box-shadow: 0 0 10px var(--neon-red);
    transition: width 0.3s ease;
}

#xp-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
    box-shadow: 0 0 10px var(--neon-cyan);
    transition: width 0.2s ease;
}

#health-text,
#level-text {
    font-family: 'Orbitron', monospace;
    font-size: 11px;
    font-weight: 400;
    color: var(--text-primary);
    min-width: 60px;
}

#tier-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

#tier-label {
    font-family: 'Orbitron', monospace;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-secondary);
}

#tier-icons {
    display: flex;
    gap: 8px;
}

.tier-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Orbitron', monospace;
    font-size: 12px;
    font-weight: 700;
    border: 2px solid var(--text-secondary);
    color: var(--text-secondary);
    clip-path: polygon(10% 0%, 100% 0%, 90% 100%, 0% 100%);
    transition: all 0.3s ease;
}

.tier-icon.active {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan);
}

.tier-icon.completed {
    border-color: var(--neon-green);
    color: var(--neon-green);
    background: rgba(0, 255, 136, 0.1);
}

#stats-container {
    display: flex;
    gap: 20px;
    padding: 8px 16px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.stat-icon {
    font-size: 14px;
}

.stat-value {
    font-family: 'Orbitron', monospace;
    font-size: 14px;
    font-weight: 700;
    color: var(--neon-yellow);
}

#kills-container {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--glass-bg);
    border: 1px solid rgba(255, 51, 102, 0.3);
    border-radius: 4px;
}

#kills-icon {
    font-size: 16px;
}

#kills-count {
    font-family: 'Orbitron', monospace;
    font-size: 18px;
    font-weight: 700;
    color: var(--neon-red);
    text-shadow: 0 0 10px var(--neon-red);
}

#progress-container {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--glass-bg);
    border: 1px solid rgba(255, 0, 255, 0.3);
    border-radius: 4px;
}

#progress-label {
    font-family: 'Orbitron', monospace;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--neon-magenta);
}

#progress-bar {
    width: 100px;
    height: 8px;
    background: var(--bg-darker);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    overflow: hidden;
}

#progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--neon-magenta), var(--neon-cyan));
    box-shadow: 0 0 10px var(--neon-magenta);
    transition: width 0.3s ease;
}

#timer-value {
    font-family: 'Orbitron', monospace;
    font-size: 14px;
    font-weight: 700;
    color: var(--neon-magenta);
    text-shadow: 0 0 10px var(--neon-magenta);
    min-width: 40px;
}

#timer-value.warning {
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan);
    animation: pulse 0.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ============ OVERLAYS ============ */
.overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at center, rgba(10, 10, 20, 0.95) 0%, rgba(5, 5, 10, 0.98) 100%);
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.overlay.hidden {
    display: none;
}

/* Main Menu */
.menu-content {
    text-align: center;
    animation: fadeSlideUp 0.6s ease-out;
}

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-title {
    font-family: 'Orbitron', monospace;
    font-size: 72px;
    font-weight: 900;
    line-height: 1;
    letter-spacing: 8px;
    background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-magenta) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    filter: drop-shadow(0 0 30px rgba(0, 255, 255, 0.5));
    margin-bottom: 20px;
}

.game-subtitle {
    font-size: 18px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 50px;
}

.menu-btn {
    font-family: 'Orbitron', monospace;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 4px;
    padding: 18px 50px;
    background: transparent;
    border: 2px solid var(--neon-cyan);
    color: var(--neon-cyan);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    clip-path: polygon(8% 0%, 100% 0%, 92% 100%, 0% 100%);
    transition: all 0.3s ease;
}

.menu-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.menu-btn:hover {
    background: rgba(0, 255, 255, 0.1);
    box-shadow: 0 0 30px var(--neon-cyan), inset 0 0 30px rgba(0, 255, 255, 0.1);
    transform: scale(1.05);
}

.menu-btn:hover::before {
    opacity: 0.2;
    animation: btnShine 1s infinite;
}

@keyframes btnShine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.menu-btn.secondary {
    border-color: var(--neon-yellow);
    color: var(--neon-yellow);
}

.menu-btn.secondary:hover {
    background: rgba(255, 255, 0, 0.1);
    box-shadow: 0 0 30px var(--neon-yellow), inset 0 0 30px rgba(255, 255, 0, 0.1);
}

.tier-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
}

#stay-tier-btn {
    display: none;
    font-size: 14px;
    padding: 14px 40px;
}

.controls-hint {
    margin-top: 40px;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 2;
}

.controls-hint p {
    opacity: 0.7;
}

/* Level Up Screen */
.levelup-content {
    text-align: center;
    animation: levelupPop 0.4s ease-out;
}

@keyframes levelupPop {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.levelup-title {
    font-family: 'Orbitron', monospace;
    font-size: 48px;
    font-weight: 900;
    letter-spacing: 6px;
    color: var(--neon-yellow);
    text-shadow: 0 0 30px var(--neon-yellow);
    margin-bottom: 10px;
}

.levelup-subtitle {
    font-size: 16px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

#choices-container {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.choice-card {
    width: 220px;
    padding: 30px 20px;
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.choice-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.choice-card:hover {
    transform: translateY(-10px);
    border-color: var(--neon-cyan);
    box-shadow: 0 10px 40px rgba(0, 255, 255, 0.2);
}

.choice-card:hover::before {
    opacity: 1;
}

.choice-card.stat-boost {
    --card-color: var(--neon-green);
}

.choice-card.item {
    --card-color: var(--neon-magenta);
}

.choice-card.special {
    --card-color: var(--neon-yellow);
}

.choice-icon {
    font-size: 48px;
    margin-bottom: 15px;
    filter: drop-shadow(0 0 10px var(--card-color));
}

.choice-name {
    font-family: 'Orbitron', monospace;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.choice-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.choice-type {
    margin-top: 15px;
    padding: 4px 12px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    background: rgba(0, 255, 255, 0.1);
    border-radius: 4px;
    display: inline-block;
}

.choice-card.stat-boost .choice-type {
    color: var(--neon-green);
    background: rgba(0, 255, 136, 0.1);
}

.choice-card.item .choice-type {
    color: var(--neon-magenta);
    background: rgba(255, 0, 255, 0.1);
}

.choice-card.special .choice-type {
    color: var(--neon-yellow);
    background: rgba(255, 255, 0, 0.1);
}

/* Tier Complete / Game Over / Victory */
.tier-content,
.gameover-content,
.victory-content {
    text-align: center;
    animation: fadeSlideUp 0.6s ease-out;
}

.tier-title {
    font-family: 'Orbitron', monospace;
    font-size: 42px;
    font-weight: 900;
    letter-spacing: 6px;
    color: var(--neon-green);
    text-shadow: 0 0 30px var(--neon-green);
    margin-bottom: 10px;
}

.tier-subtitle {
    font-size: 16px;
    letter-spacing: 2px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

#tier-stats,
#final-stats,
#victory-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
    margin-bottom: 40px;
}

.tier-stat,
.final-stat,
.victory-stat {
    text-align: center;
}

.tier-stat-label,
.final-stat-label,
.victory-stat-label {
    display: block;
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.tier-stat-value,
.final-stat-value,
.victory-stat-value {
    display: block;
    font-family: 'Orbitron', monospace;
    font-size: 32px;
    font-weight: 700;
    color: var(--neon-cyan);
    text-shadow: 0 0 15px var(--neon-cyan);
}

.gameover-title {
    font-family: 'Orbitron', monospace;
    font-size: 48px;
    font-weight: 900;
    letter-spacing: 6px;
    color: var(--neon-red);
    text-shadow: 0 0 30px var(--neon-red);
    margin-bottom: 40px;
}

.victory-title {
    font-family: 'Orbitron', monospace;
    font-size: 56px;
    font-weight: 900;
    letter-spacing: 8px;
    background: linear-gradient(135deg, var(--neon-yellow) 0%, var(--neon-orange) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 30px rgba(255, 255, 0, 0.5));
    margin-bottom: 10px;
}

.victory-subtitle {
    font-size: 18px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
    #hud {
        flex-wrap: wrap;
        gap: 15px;
        padding: 15px;
    }
    
    #health-bar,
    #xp-bar {
        width: 120px;
    }
    
    #tier-container {
        margin-left: 0;
    }
    
    .game-title {
        font-size: 48px;
    }
    
    #choices-container {
        flex-direction: column;
        align-items: center;
    }
    
    .choice-card {
        width: 280px;
    }
}

/* ============ DAMAGE NUMBERS (for JS) ============ */
.damage-number {
    position: absolute;
    font-family: 'Orbitron', monospace;
    font-size: 18px;
    font-weight: 700;
    color: var(--neon-red);
    text-shadow: 0 0 10px var(--neon-red);
    pointer-events: none;
    animation: damageFloat 0.8s ease-out forwards;
    z-index: 500;
}

.damage-number.crit {
    font-size: 28px;
    color: var(--neon-yellow);
    text-shadow: 0 0 15px var(--neon-yellow);
}

.damage-number.heal {
    color: var(--neon-green);
    text-shadow: 0 0 10px var(--neon-green);
}

@keyframes damageFloat {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(-50px) scale(0.8);
    }
}

/* Screen shake animation class */
.screen-shake {
    animation: shake 0.2s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}