/* 공통 변수 및 리셋 (솔트룩스 스타일) */
:root {
    --primary-blue: #001b38;
    --point-blue: #0056ff;
    --accent-cyan: #00e5ff;
    --text-dark: #111111;
    --text-gray: #666666;
    --bg-light: #f4f7fa;
    --white: #ffffff;
    --transition: all 0.4s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Noto Sans KR', sans-serif; color: var(--text-dark); line-height: 1.6; scroll-behavior: smooth; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 40px; }

/* 유틸리티 클래스 */
.section { padding: 120px 0; }
.dark-bg { background: var(--primary-blue); color: var(--white); }
.light-bg { background: var(--bg-light); }
.text-center { text-align: center; }
.reveal { opacity: 0; transform: translateY(30px); transition: var(--transition); }
.reveal.active { opacity: 1; transform: translateY(0); }

/* 헤더 */
header { position: fixed; top: 0; width: 100%; z-index: 1000; padding: 20px 0; transition: var(--transition); }
header.scrolled { background: rgba(255,255,255,0.95); box-shadow: 0 2px 10px rgba(0,0,0,0.05); padding: 15px 0; }
.nav-inner { display: flex; justify-content: space-between; align-items: center; }
.logo { font-family: 'Poppins', sans-serif; font-size: 28px; font-weight: 800; color: var(--primary-blue); }
.logo span { color: var(--point-blue); }
header:not(.scrolled) .logo { color: var(--white); }
.gnb { display: flex; gap: 40px; }
.gnb a { font-weight: 500; transition: 0.3s; }
header:not(.scrolled) .gnb a { color: var(--white); }
header.scrolled .gnb a { color: var(--primary-blue); }
.gnb a:hover { color: var(--point-blue); }

/* 버튼 */
.btn { display: inline-block; padding: 14px 30px; border-radius: 30px; font-weight: 600; cursor: pointer; transition: 0.3s; border: none; }
.btn-primary { background: var(--point-blue); color: var(--white); }
.btn-primary:hover { background: var(--accent-cyan); color: var(--primary-blue); }
.btn-outline { border: 1px solid var(--point-blue); color: var(--point-blue); background: transparent; }
.btn-outline:hover { background: var(--point-blue); color: var(--white); }
.btn-danger { background: #ff4d4f; color: white; padding: 5px 12px; border-radius: 4px; font-size: 13px; }

/* 메인 배너 (Hero) */
.hero { height: 100vh; background: var(--primary-blue); display: flex; align-items: center; color: var(--white); position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; right: -10%; top: -10%; width: 50%; height: 80%; background: radial-gradient(circle, rgba(0,229,255,0.2) 0%, transparent 60%); }
.hero-content { position: relative; z-index: 2; }
.tag-label { color: var(--accent-cyan); font-weight: 700; letter-spacing: 2px; margin-bottom: 15px; display: inline-block; }
.hero-title { font-size: 72px; font-family: 'Poppins', sans-serif; font-weight: 800; line-height: 1.2; margin-bottom: 30px; }
.hero-title span { color: var(--accent-cyan); }
.hero-desc { font-size: 22px; margin-bottom: 40px; opacity: 0.8; }

/* 레이아웃 & 카드 */
.section-title { font-size: 42px; font-family: 'Poppins', sans-serif; font-weight: 800; margin-bottom: 20px; }
.section-title span { color: var(--accent-cyan); }
.two-column { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.three-column { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.align-center { align-items: center; }
.image-wrapper img { width: 100%; border-radius: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.profile-box { background: rgba(255,255,255,0.8); padding: 30px; border-radius: 12px; border-left: 4px solid var(--point-blue); }
.profile-box ul { margin-top: 15px; color: var(--text-gray); }
.spec-list li { margin-bottom: 10px; color: var(--text-gray); }
.spec-list i { color: var(--point-blue); margin-right: 10px; }

.card { background: rgba(255,255,255,0.05); padding: 40px; border-radius: 20px; border: 1px solid rgba(255,255,255,0.1); transition: 0.3s; }
.dark-bg .card:hover { background: rgba(255,255,255,0.1); border-color: var(--accent-cyan); transform: translateY(-10px); }
.card-icon { font-size: 36px; color: var(--accent-cyan); margin-bottom: 20px; }
.card h3 { font-size: 24px; margin-bottom: 15px; color: var(--white); }
.card p { color: #a1a1aa; font-size: 15px; }

/* 공지사항 (Notice) 게시판 영역 */
.notice-container { background: var(--white); border-radius: 20px; padding: 40px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
.admin-toggle { text-align: right; margin-bottom: 20px; }
#admin-form { display: none; background: #f8fbff; padding: 30px; border-radius: 12px; margin-bottom: 30px; border: 1px dashed var(--point-blue); }
.form-row { display: flex; gap: 20px; }
.form-group { margin-bottom: 15px; }
.form-group label { display: block; font-size: 14px; font-weight: 700; margin-bottom: 5px; color: var(--primary-blue); }
.form-control { width: 100%; padding: 12px; border: 1px solid #ddd; border-radius: 6px; font-family: inherit; }

.board-table { width: 100%; border-collapse: collapse; }
.board-table th { padding: 15px; border-bottom: 2px solid var(--primary-blue); text-align: left; color: var(--text-gray); font-size: 14px; }
.board-table td { padding: 15px; border-bottom: 1px solid #eee; }
.board-table tr:hover td { background: #f9f9f9; }
.notice-tag { padding: 4px 10px; border-radius: 4px; font-size: 12px; font-weight: 700; display: inline-block; }
.tag-notice { background: rgba(0, 86, 255, 0.1); color: var(--point-blue); }
.tag-ir { background: rgba(153, 255, 51, 0.2); color: #5b8c00; }
.tag-update { background: rgba(0, 229, 255, 0.1); color: #008fa3; }
.delete-col { display: none; }
.admin-active .delete-col { display: table-cell; }

/* 푸터 */
footer { background: #0a0a0a; color: #888; padding: 60px 0 30px 0; }
.footer-flex { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid #333; padding-bottom: 30px; }
.footer-logo { font-family: 'Poppins', sans-serif; font-size: 24px; font-weight: 800; color: var(--white); display: block; margin-bottom: 10px; }
.footer-logo span { color: var(--point-blue); }
.footer-links a { margin-left: 20px; transition: 0.3s; }
.footer-links a:hover { color: var(--white); }