/* 스타일 1: 클린 & 모던 (Light Mode) */
:root {
    --primary-color: #007bff;
    --secondary-color: #0056b3;
    --bg-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-color: #212529;
    --text-muted-color: #6c757d;
    --border-color: #dee2e6;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Noto Sans KR', sans-serif; background-color: var(--bg-color); color: var(--text-color); line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { text-decoration: none; color: var(--primary-color); transition: color 0.3s ease; }
a:hover { color: var(--secondary-color); }
h1, h2, h3 { font-weight: 700; }

/* 헤더 & 네비게이션 */
header { background-color: rgba(255, 255, 255, 0.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); padding: 20px 0; position: sticky; top: 0; z-index: 1000; }
header .container { display: flex; justify-content: space-between; align-items: center; }
.logo h1 { font-size: 28px; font-weight: 900; color: var(--text-color); }
.logo h1 i { color: var(--primary-color); }
.logo .highlight { color: var(--primary-color); }
nav ul { list-style: none; display: flex; gap: 25px; }
nav a { color: var(--text-muted-color); font-weight: 700; font-size: 16px; transition: color 0.3s ease; }
nav a:hover { color: var(--text-color); }
nav a.nav-contact { color: #fff; background-color: var(--primary-color); padding: 8px 15px; border-radius: 5px; transition: background-color 0.3s; }
nav a.nav-contact:hover { background-color: var(--secondary-color); color: #fff; }

/* 히어로 섹션 */
.hero { text-align: center; padding: 80px 0 60px; background-color: #fff; border-bottom: 1px solid var(--border-color); }
.hero h2 { font-size: 42px; margin-bottom: 15px; }
.hero h2 span { color: var(--primary-color); }
.hero p { font-size: 18px; color: var(--text-muted-color); max-width: 600px; margin: 0 auto; }

/* 사이트 그리드 */
#sites-grid { padding: 60px 0; }
.grid-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; }
.site-card { background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: 8px; overflow: hidden; transition: transform 0.3s ease, box-shadow 0.3s ease; display: flex; flex-direction: column; }
.site-card:hover { transform: translateY(-8px); box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08); }
.site-card img { width: 100%; height: auto; display: block; border-bottom: 1px solid var(--border-color); }
.card-content { padding: 25px; display: flex; flex-direction: column; flex-grow: 1; }
.card-content h3 { font-size: 20px; margin-bottom: 10px; color: var(--text-color); }
.card-content p { color: var(--text-muted-color); font-size: 15px; margin-bottom: 20px; flex-grow: 1; }
.tags { margin-bottom: 20px; }
.tag { display: inline-block; padding: 4px 10px; border-radius: 20px; font-size: 12px; font-weight: 700; margin-right: 8px; color: #fff; }
.tag.guaranteed { background-color: #28a745; }
.tag.new { background-color: #17a2b8; }
.tag.event { background-color: #ffc107; color: #212529; }
.btn-go { display: block; width: 100%; text-align: center; padding: 12px; background-color: var(--primary-color); color: #fff; font-weight: 700; border-radius: 5px; transition: background-color 0.2s ease; }
.btn-go:hover { background-color: var(--secondary-color); color: #fff; }

/* 배너 문의 섹션 */
#banner-inquiry { background-color: #e9ecef; padding: 60px 0; text-align: center; }
#banner-inquiry h2 { font-size: 32px; margin-bottom: 15px; }
#banner-inquiry h2 i { color: var(--primary-color); margin-right: 10px; }
#banner-inquiry p { color: var(--text-muted-color); max-width: 600px; margin: 0 auto 30px; }
.contact-info { margin-bottom: 30px; }
.contact-info p { font-size: 18px; margin-bottom: 10px; color: var(--text-color); }
.contact-info i { margin-right: 10px; color: var(--primary-color); }
.btn-contact { display: inline-block; padding: 15px 40px; font-size: 18px; font-weight: 700; color: #fff; background-color: #28a745; border-radius: 50px; transition: transform 0.3s ease, background-color 0.3s; }
.btn-contact:hover { transform: scale(1.05); background-color: #218838; color: #fff; }

/* 푸터 */
footer { padding: 40px 0; text-align: center; background-color: #fff; border-top: 1px solid var(--border-color); }
footer p { font-size: 14px; color: #6c757d; margin-bottom: 5px; }

/* 반응형 */
@media (max-width: 768px) {
    header .container { flex-direction: column; gap: 20px; }
    nav ul { gap: 15px; justify-content: center; flex-wrap: wrap; }
    .hero h2 { font-size: 32px; }
    .hero p { font-size: 16px; }
    .grid-container { grid-template-columns: 1fr; }
}