:root {
    --body-bg: #0b120d;
    --panel-bg: rgba(16, 30, 20, 0.9);
    --accent: #19ff69; /* Neonowy zielony */
    --accent-hover: #0bf550;
    --text-main: #eaffea;
    --glow-shadow: 0 0 20px rgba(25, 255, 105, 0.4);
    --wall-color: #070d08;
}

body {
    background: radial-gradient(circle at center, #122817 0%, var(--body-bg) 100%);
    color: var(--text-main);
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    text-align: center;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
}

h1 {
    font-size: 2.5em;
    color: var(--accent);
    text-shadow: var(--glow-shadow);
    margin: 10px 0 20px 0;
    letter-spacing: 2px;
}

/* Ekran Startowy (wąski panel w strumieniu flex) */
#startScreen {
    background: var(--panel-bg);
    padding: 40px 50px;
    border-radius: 16px;
    border: 1px solid var(--accent);
    box-shadow: var(--glow-shadow);
    backdrop-filter: blur(8px);
    z-index: 200;
    max-width: 450px;
    width: 90%;
    box-sizing: border-box;
}

/* Ekran Wygranej - IDEALNIE NA ŚRODKU EKRANU */
#endScreen {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--panel-bg);
    padding: 40px 50px;
    border-radius: 16px;
    border: 1px solid var(--accent);
    box-shadow: var(--glow-shadow);
    backdrop-filter: blur(12px);
    z-index: 300;
    max-width: 450px;
    width: 90%;
    box-sizing: border-box;
}

#startScreen h2, #endScreen h2 {
    margin-top: 0;
    color: #fff;
    font-size: 1.8em;
}

/* Usunięcie podkreślenia linku Menu Głównego */
#startScreen a {
    text-decoration: none;
    display: block;
    width: 100%;
}

/* Przyciski */
.difficultyBtn, #restartBtn, #playAgainBtn {
    display: block;
    width: 100%;
    box-sizing: border-box;
    padding: 14px 28px;
    margin: 14px 0;
    font-size: 1.2em;
    font-weight: bold;
    border-radius: 8px;
    border: none;
    background: var(--accent);
    color: #050a06;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
}

.difficultyBtn:hover, #restartBtn:hover, #playAgainBtn:hover {
    background: var(--accent-hover);
    box-shadow: var(--glow-shadow);
    transform: translateY(-2px);
}

.difficultyBtn:active {
    transform: translateY(0);
}

/* Specjalny przycisk powrotu do Menu */
#startScreen a .difficultyBtn {
    background: #1f3a25;
    color: var(--accent);
    border: 1px solid var(--accent);
    margin-bottom: 0;
}

#startScreen a .difficultyBtn:hover {
    background: #294f32;
}

/* Kontener Rozgrywki */
#gameContainer {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    gap: 30px;
    background: rgba(0, 0, 0, 0.2);
    padding: 20px;
    border-radius: 12px;
    max-width: 95vw;
}

/* Canvas */
#gameCanvas {
    border: 2px solid var(--accent);
    background: #101f14;
    box-shadow: var(--glow-shadow);
    border-radius: 8px;
}

/* Panel boczny statystyk */
#infoPanel {
    background: var(--panel-bg);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--accent);
    box-shadow: var(--glow-shadow);
    backdrop-filter: blur(8px);
    min-width: 180px;
    text-align: left;
}

#infoPanel p {
    font-size: 1.2em;
    margin: 12px 0;
    color: #bbf0cb;
}

#infoPanel span {
    font-weight: bold;
    color: var(--accent);
    text-shadow: 0 0 5px rgba(25, 255, 105, 0.5);
}

/* Klasy pomocnicze */
.hidden {
    display: none !important;
}

/* Responsywność */
@media (max-width: 800px) {
    #gameContainer {
        flex-direction: column;
        align-items: center;
    }
    #infoPanel {
        width: 100%;
        box-sizing: border-box;
    }
}