@import url('https://fonts.googleapis.com/css2?family=Segoe+UI:wght@300;400;600;700&display=swap');

* {
    box-sizing: border-box;
}

body, html {
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    background-color: #000;
    overflow: hidden; /* Zakázat scrollování pro fullscreen hru */
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #fff;
}

/* Plátno */
canvas {
    display: block;
    margin: 0 auto;
    /* max-width/height je řešeno v JS, aby se zachoval poměr stran */
    background-color: #000;
}

/* UI vrstva */
#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; /* Kliknutí propadnou na canvas */
    z-index: 10;
}

.hud {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 1.5rem;
    font-weight: 600;
    color: #ffc107;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
    display: flex;
    gap: 30px;
}

.btn-back {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    background-color: #333;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    pointer-events: auto; /* Zapnout klikání */
    transition: background 0.2s;
}

.btn-back:hover {
    background-color: #555;
}

/* Overlays (Start, Game Over) */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.85); /* Tmavé průhledné pozadí */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

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

/* Metro styl panely a tlačítka */
.metro-panel {
    background-color: #1a1a1a;
    padding: 40px;
    min-width: 400px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.8);
    border: 1px solid #333;
}

.metro-panel h1 {
    margin-top: 0;
    font-size: 3rem;
    color: #ffc107;
    font-weight: 300;
}

.metro-btn {
    display: inline-block;
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    font-size: 1.2rem;
    font-weight: 600;
    border: none;
    color: white;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.1s, filter 0.2s;
}

.metro-btn:hover {
    filter: brightness(1.2);
}

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

.btn-primary { background-color: #0078d7; }
.btn-success { background-color: #107c10; }
.btn-secondary { background-color: #555; }

.mt-2 { margin-top: 10px; }
.mt-4 { margin-top: 20px; }

/* Formulář na skóre */
.score-form {
    background-color: #2a2a2a;
    padding: 20px;
    margin-top: 20px;
}

.score-form input[type="text"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    font-size: 1.1rem;
    border: 2px solid #555;
    background-color: #111;
    color: #fff;
    outline: none;
}

.score-form input[type="text"]:focus {
    border-color: #0078d7;
}