/* 기본 테마 및 사이버 배경 설정 */
:root {
    --neon-cyan: #0ff;
    --neon-pink: #ff0055;
    --bg-dark: #0a0a12;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-dark);
    color: #fff;
    font-family: 'Pretendard', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    /* 사이버 그리드 배경 효과 */
    background-image: 
        linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%),
        linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06)),
        linear-gradient(0deg, #121212 1px, transparent 1px),
        linear-gradient(90deg, #121212 1px, transparent 1px);
    background-size: 100% 2px, 3px 100%, 40px 40px, 40px 40px;
}

/* 메인 컨테이너 */
.container {
    background: rgba(10, 10, 20, 0.85);
    padding: 40px;
    border-radius: 20px;
    border: 2px solid var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5), inset 0 0 15px rgba(0, 255, 255, 0.2);
    text-align: center;
    max-width: 600px;
    width: 90%;
    backdrop-filter: blur(10px);
    position: relative;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    text-transform: uppercase;
    letter-spacing: 10px;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan), 0 0 20px var(--neon-cyan);
}

/* 버튼 디자인 */
.btn-cyber {
    background: transparent;
    color: var(--neon-cyan);
    border: 2px solid var(--neon-cyan);
    padding: 15px 30px;
    font-size: 1.2rem;
    font-weight: bold;
    text-transform: uppercase;
    cursor: pointer;
    transition: 0.3s;
    position: relative;
    overflow: hidden;
    margin-bottom: 30px;
    font-family: inherit;
}

.btn-cyber:hover {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 30px var(--neon-cyan);
}

/* 오디오 컨트롤 */
.audio-controls {
    position: absolute;
    top: 20px;
    right: 20px;
}

.btn-audio {
    background: transparent;
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: 0.3s;
    font-size: 1.2rem;
}

.btn-audio.active {
    background: var(--neon-cyan);
    color: #000;
    box-shadow: 0 0 10px var(--neon-cyan);
}

/* 결과 영역 */
.result-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.lotto-set {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 10px;
    border-bottom: 1px dashed rgba(0, 255, 255, 0.3);
    animation: fadeIn 0.5s ease-out forwards;
}

/* 번호 공 디자인 */
.ball {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 900;
    font-size: 1.2rem;
    color: #fff;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
    box-shadow: inset -5px -5px 10px rgba(0,0,0,0.5);
    transition: transform 0.2s;
}

.ball:hover {
    transform: scale(1.2) rotate(10deg);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 반응형 */
@media (max-width: 480px) {
    .ball { width: 35px; height: 35px; font-size: 0.9rem; }
    h1 { font-size: 1.8rem; letter-spacing: 5px; }
}