/* ============================================
   GeoRun - Neon Rhythm Platformer Styles
   ============================================ */

:root {
    /* Color Palette */
    --bg-dark: #0a0a1a;
    --bg-gradient-start: #0a0a1a;
    --bg-gradient-end: #1a0a2e;
    --player-green: #00ff88;
    --spike-red: #ff3366;
    --platform-blue: #4466ff;
    --accent-gold: #ffcc00;
    --text-white: #ffffff;
    --text-muted: #8888aa;

    /* Glow Effects */
    --glow-green: 0 0 20px #00ff88, 0 0 40px #00ff8866;
    --glow-red: 0 0 20px #ff3366, 0 0 40px #ff336666;
    --glow-blue: 0 0 20px #4466ff, 0 0 40px #4466ff66;
    --glow-gold: 0 0 20px #ffcc00, 0 0 40px #ffcc0066;

    /* Typography */
    --font-title: 'Orbitron', sans-serif;
    --font-body: 'Roboto', sans-serif;
}

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

body {
    font-family: var(--font-body);
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    overflow: hidden;
    color: var(--text-white);
}

/* ============================================
   Game Container
   ============================================ */

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

#game-canvas {
    display: block;
    background: linear-gradient(180deg,
            #0d0d2b 0%,
            #1a1a3a 50%,
            #0d0d2b 100%);
    border-radius: 8px;
    box-shadow:
        0 0 60px rgba(68, 102, 255, 0.3),
        inset 0 0 60px rgba(0, 0, 0, 0.5);
}

/* ============================================
   Overlay Screens
   ============================================ */

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 10, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.menu-content {
    text-align: center;
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Typography
   ============================================ */

.game-title {
    font-family: var(--font-title);
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--player-green) 0%, var(--accent-gold) 50%, var(--platform-blue) 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, 136, 0.5));
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    animation: titlePulse 2s ease-in-out infinite;
}

@keyframes titlePulse {

    0%,
    100% {
        filter: drop-shadow(0 0 30px rgba(0, 255, 136, 0.5));
    }

    50% {
        filter: drop-shadow(0 0 50px rgba(0, 255, 136, 0.8));
    }
}

.game-subtitle {
    font-family: var(--font-title);
    font-size: clamp(0.8rem, 3vw, 1.2rem);
    color: var(--text-muted);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 3rem;
}

.pause-title,
.gameover-title,
.victory-title {
    font-family: var(--font-title);
    font-size: clamp(2rem, 8vw, 4rem);
    font-weight: 700;
    margin-bottom: 2rem;
}

.pause-title {
    color: var(--accent-gold);
    text-shadow: var(--glow-gold);
}

.gameover-title {
    color: var(--spike-red);
    text-shadow: var(--glow-red);
    animation: shake 0.5s ease;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    20%,
    60% {
        transform: translateX(-10px);
    }

    40%,
    80% {
        transform: translateX(10px);
    }
}

.victory-title {
    color: var(--player-green);
    text-shadow: var(--glow-green);
    animation: victoryPulse 0.5s ease;
}

@keyframes victoryPulse {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }

    50% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.progress-text {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.progress-text span {
    color: var(--accent-gold);
    font-weight: 700;
}

/* ============================================
   Buttons
   ============================================ */

.neon-btn {
    font-family: var(--font-title);
    font-size: 1.2rem;
    font-weight: 700;
    padding: 1rem 3rem;
    margin: 0.5rem;
    border: 2px solid var(--player-green);
    background: transparent;
    color: var(--player-green);
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.neon-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 136, 0.3), transparent);
    transition: left 0.5s ease;
}

.neon-btn:hover::before {
    left: 100%;
}

.neon-btn:hover {
    background: var(--player-green);
    color: var(--bg-dark);
    box-shadow: var(--glow-green);
    transform: translateY(-2px);
}

.neon-btn:active {
    transform: translateY(0);
}

.neon-btn.secondary {
    border-color: var(--text-muted);
    color: var(--text-muted);
}

.neon-btn.secondary:hover {
    background: var(--text-muted);
    color: var(--bg-dark);
    box-shadow: 0 0 20px rgba(136, 136, 170, 0.5);
}

/* ============================================
   Controls Info
   ============================================ */

.controls-info {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.controls-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0.5rem 0;
}

kbd {
    display: inline-block;
    padding: 0.3rem 0.6rem;
    font-family: var(--font-body);
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    margin: 0 0.2rem;
}

/* ============================================
   Game HUD
   ============================================ */

#game-hud {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 50;
    transition: opacity 0.3s ease;
}

#game-hud.hidden {
    opacity: 0;
}

#current-level {
    font-family: var(--font-title);
    font-size: 0.9rem;
    color: var(--accent-gold);
    white-space: nowrap;
}

.progress-bar {
    width: 300px;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

#progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--player-green), var(--accent-gold));
    border-radius: 4px;
    transition: width 0.1s linear;
    box-shadow: 0 0 10px var(--player-green);
}

#progress-percent {
    font-family: var(--font-title);
    font-size: 1rem;
    color: var(--player-green);
    min-width: 50px;
}

/* ============================================
   Level Selector
   ============================================ */

.level-selector {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.level-label {
    font-family: var(--font-title);
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.level-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.level-btn {
    width: 50px;
    height: 50px;
    border: 2px solid var(--platform-blue);
    background: transparent;
    color: var(--platform-blue);
    font-family: var(--font-title);
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.level-btn:hover {
    background: rgba(68, 102, 255, 0.2);
    transform: translateY(-2px);
}

.level-btn.selected {
    background: var(--platform-blue);
    color: var(--bg-dark);
    box-shadow: var(--glow-blue);
}

.difficulty-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.difficulty-text span {
    color: var(--accent-gold);
    font-weight: 700;
}

/* ============================================
   Particles Background
   ============================================ */

#particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--player-green);
    border-radius: 50%;
    opacity: 0.5;
    animation: floatUp 4s linear infinite;
}

@keyframes floatUp {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }

    10% {
        opacity: 0.5;
    }

    90% {
        opacity: 0.5;
    }

    100% {
        transform: translateY(-10vh) scale(1);
        opacity: 0;
    }
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
    .progress-bar {
        width: 200px;
    }

    .neon-btn {
        padding: 0.8rem 2rem;
        font-size: 1rem;
    }

    .controls-info {
        display: none;
    }
}

@media (max-width: 480px) {
    .progress-bar {
        width: 150px;
    }
}