/* --- Header & Navigation --- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.nav-menu ul {
    display: flex;
    gap: 20px;
}

.nav-menu a {
    font-weight: 700;
    color: var(--text-color);
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.auth-buttons {
    display: flex;
    gap: 10px;
}

.hamburger-menu {
    display: none; /* 모바일에서만 보이도록 설정 */
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- Hero Section --- */
.hero {
    padding: 80px 0;
    text-align: center;
    background: linear-gradient(135deg, #6a89cc, #4a69bd);
    color: var(--white-color);
}

.hero h2 {
    font-size: 2.5rem;
}

.winning-numbers {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin: 20px 0;
}

.ball {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white-color);
    box-shadow: inset -3px -3px 5px rgba(0,0,0,0.2);
}

.plus-ball {
    font-size: 2rem;
    font-weight: 700;
}

.sub-copy {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
}

/* --- How It Works Section --- */
.how-it-works {
    padding: 60px 0;
    text-align: center;
}

.how-it-works h3 {
    font-size: 2rem;
    margin-bottom: 40px;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.step {
    background-color: var(--white-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.step-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.step h4 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

/* --- Responsive Styles --- */
@media (max-width: 768px) {
    .nav-menu, .auth-buttons {
        display: none; /* 모바일에서는 메뉴와 버튼 숨김 */
    }

    .hamburger-menu {
        display: block; /* 햄버거 메뉴 보이기 */
    }
    
    /* TODO: JS로 햄버거 클릭 시 .nav-menu를 block으로 변경하는 기능 필요 */
    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        right: 20px;
        background: var(--white-color);
        padding: 20px;
        border-radius: var(--border-radius);
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }


    .hero h2 {
        font-size: 2rem;
    }
    
    .winning-numbers {
        flex-wrap: wrap; /* 번호가 많아지면 줄바꿈 */
    }

    .ball {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .steps-container {
        grid-template-columns: 1fr; /* 1열로 변경 */
    }
}