:root {
    --primary-color: #FFD700;
    --accent-color: #FF6B6B;
    --text-color: #FFFFFF;
    --bg-gradient-start: #4FACFE;
    --bg-gradient-end: #00F2FE;
    --font-main: 'Outfit', sans-serif;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-soft: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

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

body {
    font-family: var(--font-main);
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100vh;
    /* Responsive - fills browser window height */
    max-width: 800px;
    /* Limit max width for desktop */
    margin: 0 auto;
    /* Center on wide screens */
    background: rgba(0, 0, 0, 0.1);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 20; /* Ensure UI is on top of everything */
    /* Let clicks pass through to canvas/game unless on buttons */
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    transition: opacity 0.3s ease;
    pointer-events: auto;
}

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

.screen.active {
    opacity: 1;
    pointer-events: auto;
}

h1 {
    font-size: 2.5rem;
    /* Reduced from 3rem */
    color: var(--primary-color);
    text-shadow: 2px 2px 0px #000;
    margin-bottom: 1.5rem;
    text-align: center;
    animation: float 3s ease-in-out infinite;
}

h2 {
    font-size: 2rem;
    /* Reduced from 2.5rem */
    color: var(--text-color);
    margin-bottom: 1rem;
}

.key-badge {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 900;
    color: var(--primary-color);
}

.key-badge.circle {
    border-radius: 50%;
    padding: 1rem;
    width: 60px;
    height: 60px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin-right: 0.5rem;
}

/* Mobile/Desktop Visibility */
.mobile-msg {
    display: none;
}

.desktop-msg {
    display: block;
}

@media (hover: none) and (pointer: coarse) {
    .mobile-msg {
        display: block !important;
    }

    .desktop-msg {
        display: none !important;
    }
}

.score-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-soft);
}

.score-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #DDD;
    margin-bottom: 0.5rem;
}

.value {
    font-size: 2rem;
    font-weight: 900;
    color: var(--text-color);
}

button {
    background: var(--primary-color);
    color: #333;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 900;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
    font-family: var(--font-main);
    box-shadow: 0 4px 0 #B8860B;
}

button:active {
    transform: translateY(4px);
    box-shadow: 0 0 0 #B8860B;
}

#hud {
    position: absolute;
    top: 50px; /* Fixed pixel value instead of % to avoid off-screen issues */
    width: 100%;
    text-align: center;
    pointer-events: none;
    z-index: 25;
}

#score-display {
    font-size: 3rem;
    font-weight: bold;
    color: #FFFFFF;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8), 0 0 10px rgba(0, 0, 0, 0.5);
    margin: 0;
    transition: all 0.3s ease;
}

.hidden {
    display: none !important;
}

@keyframes float {

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

    50% {
        transform: translateY(-10px);
    }
}

@keyframes score-bump {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }

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

@keyframes score-bump-big {
    0% {
        transform: scale(1);
        color: #FFD700;
    }

    50% {
        transform: scale(1.5);
        color: #FFF;
    }

    100% {
        transform: scale(1);
        color: #FFF;
    }
}

@keyframes shine {
    0% {
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3), 0 0 0 rgba(255, 255, 255, 0);
    }

    50% {
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3), 0 0 20px rgba(255, 255, 255, 0.8);
    }

    100% {
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3), 0 0 0 rgba(255, 255, 255, 0);
    }
}

.shine-effect {
    animation: shine 3s infinite ease-in-out;
}

/* High Score Text Animation */
.jumping-letter {
    display: inline-block;
    position: relative;
    animation: letter-hop 0.6s infinite alternate ease-in-out;
    font-weight: 900;
    /* Make it extra bold */
}

@keyframes letter-hop {
    0% {
        transform: translateY(0) scale(1);
    }

    100% {
        transform: translateY(-15px) scale(1.1);
    }
}

/* Achievement Notification */
.achievement-notif {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(45deg, #FFD700, #FFA500);
    color: #FFF;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 900;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    z-index: 100;
    animation: slideDown 0.5s ease-out;
    pointer-events: none;
}

.achievement-notif.fade-out {
    opacity: 0;
    transition: opacity 1s ease;
}

@keyframes slideDown {
    from {
        transform: translate(-50%, -100%);
    }

    to {
        transform: translate(-50%, 0);
    }
}

/* Neo Mode Visuals */
#matrix-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 255, 0, 0.4); /* Increased from 0.15 */
    mix-blend-mode: overlay;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 5; /* Above canvas, below UI */
}

#matrix-overlay.active {
    opacity: 1;
}

#neo-text {
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    font-size: 4rem;
    font-weight: 900;
    color: #00FF00;
    text-shadow: 0 0 10px #00FF00, 0 0 20px #003300;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
}

#neo-text.animate {
    animation: neo-expand 1.5s ease-out forwards;
}

@keyframes neo-expand {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 0;
    }
    20% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 1;
    }
    40% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    80% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(3);
        opacity: 0;
    }
}