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

:root {
    --bg-color: #0a0a1a;
    --main-color: #00ffff;
    --obstacle-color: #ff00ff;
    --text-color: #00ffff;
    --shadow-color: #00ffff;
}

body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Orbitron', sans-serif;
    overflow: hidden;
    transition: background-color 0.5s ease;
}

h1, h2 {
    text-shadow: 0 0 10px var(--shadow-color), 0 0 20px var(--shadow-color);
}

button {
    background: transparent;
    border: 2px solid var(--main-color);
    color: var(--text-color);
    padding: 10px 20px;
    margin: 10px;
    font-family: 'Orbitron', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 5px var(--shadow-color), inset 0 0 5px var(--shadow-color);
}

button:hover {
    background-color: var(--main-color);
    color: var(--bg-color);
    box-shadow: 0 0 20px var(--shadow-color), inset 0 0 10px var(--shadow-color);
}

#main-menu, #game-over-screen {
    text-align: center;
}

#game-container {
    position: relative;
    border: 2px solid var(--main-color);
    box-shadow: 0 0 15px var(--shadow-color);
    transition: border-color 0.5s ease, box-shadow 0.5s ease;
}

#score-display, #highscore-display {
    position: absolute;
    top: 10px;
    font-size: 1.2em;
    text-shadow: 0 0 5px var(--shadow-color);
    transition: text-shadow 0.5s ease;
}

#score-display {
    left: 20px;
}

#highscore-display {
    right: 20px;
}

#game-over-screen {
    background-color: rgba(10, 10, 26, 0.85);
    padding: 30px;
    border-radius: 10px;
    border: 2px solid var(--main-color);
    box-shadow: 0 0 20px var(--shadow-color);
}

/* 모달 스타일 */
.modal {
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--bg-color);
    padding: 20px 40px;
    border: 2px solid var(--main-color);
    border-radius: 10px;
    text-align: center;
    position: relative;
    box-shadow: 0 0 20px var(--shadow-color);
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    color: #aaa;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-btn:hover {
    color: #fff;
}

.hidden {
    display: none;
}