body {
    background: linear-gradient(to bottom right, #0f172a, #1e293b);
    font-family: 'Poppins', sans-serif;
    color: #e2e8f0;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* 상단 네온 영역 */
.voca-hero {
    padding: 4rem 1rem 4rem;
    text-align: center;
    background: radial-gradient(circle at top, rgba(0, 240, 255, 0.15), transparent);
}

.voca-title {
    font-size: 2.5rem;
    color: #00f0ff;
    text-shadow: 0 0 8px #00f0ff, 0 0 16px #00f0ff;
    margin-bottom: 0.5rem;
}

.voca-subtitle {
    font-size: 1.1rem;
    color: #94a3b8;
    margin-bottom: 2rem;
}

/* 메인 용어 선택 카드 */
.voca-container {
    padding: 0 2rem 4rem;
    max-width: 1000px;
    margin: 3rem auto 0; /* 상단 여백 추가 */
}


.voca-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.voca-card {
    background-color: rgba(30, 41, 59, 0.9);
    color: #00f0ff;
    padding: 1.5rem;
    text-decoration: none;
    font-size: 1.1rem;
    border-radius: 12px;
    transition: transform 0.2s, background-color 0.2s;
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.1);
    backdrop-filter: blur(4px);
}

.voca-card:hover {
    background-color: rgba(51, 65, 85, 0.9);
    transform: translateY(-4px);
}

/* 버튼 영역 */
.back-home-section {
    margin-top: 3rem;
    text-align: center;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.2s, box-shadow 0.2s;
}

.neon-home-btn {
    background-color: #00f0ff;
    color: #0f172a;
    box-shadow: 0 0 8px #00f0ff;
}

.neon-home-btn:hover {
    background-color: #38bdf8;
    box-shadow: 0 0 12px #38bdf8;
}

/* 반응형 개선 */
@media (max-width: 768px) {
    .voca-title {
        font-size: 2rem;
    }

    .voca-subtitle {
        font-size: 1rem;
    }
}
.recommend-box {
    background-color: rgba(255, 255, 255, 0.04);
    border-left: 4px solid #00f0ff;
    padding: 1rem 1.5rem;
    margin: 2rem auto 2rem;
    max-width: 720px;
    color: #cbd5e1;
    border-radius: 6px;
}
.recommend-box h3 {
    margin: 0 0 0.5rem;
}
.recommend-box ul {
    padding-left: 1.2rem;
    margin: 0;
}
.recommend-box li {
    margin-bottom: 0.3rem;
}
@media (max-width: 768px) {
    .voca-title {
        font-size: 2rem;
    }

    .voca-subtitle {
        font-size: 1rem;
        line-height: 1.5;
        padding: 0 1rem;
    }

    .voca-card {
        padding: 1.2rem;
        font-size: 1rem;
    }

    .recommend-box {
        padding: 0.8rem 1rem;
        font-size: 0.95rem;
    }

    .recommend-box h3 {
        font-size: 1.05rem;
    }

    .recommend-box ul {
        padding-left: 1rem;
    }
}