:root {
    --primary-color: #ff6b6b;
    --secondary-color: #4ecdc4;
    --accent-color: #f7d794;
    --dark-bg: #1a1a2e;
    --light-text: #ecf0f1;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: var(--dark-bg);
    color: var(--light-text);
    font-family: var(--font-family);
    display: flex;
    justify-content: center;
    align-items: center;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
    cursor: crosshair;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.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, 0.7);
    pointer-events: auto;
    backdrop-filter: blur(5px);
    transition: opacity 0.3s ease;
}

h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #bdc3c7;
}

.primary-btn {
    padding: 1rem 2rem;
    font-size: 1.5rem;
    border: none;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--primary-color), #ee5253);
    color: white;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.6);
}

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

#hud {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    pointer-events: auto;
}

.hidden {
    opacity: 0;
    pointer-events: none !important;
    visibility: hidden;
    transition: visibility 0s 0.3s, opacity 0.3s linear;
}

.stat-box {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: bold;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.label {
    color: var(--accent-color);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

.icon-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    color: white;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(10px);
    transition: background 0.2s ease;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

#controls-hint {
    position: absolute;
    bottom: 20px;
    left: 0;
    width: 100%;
    text-align: center;
    opacity: 0.7;
    pointer-events: none;
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    h1 { font-size: 2rem; }
    p { font-size: 1rem; }
    .primary-btn { font-size: 1.2rem; padding: 0.8rem 1.6rem; }
    #hud { top: 10px; left: 10px; right: 10px; }
    .stat-box { padding: 8px 12px; font-size: 0.9rem; }
}