* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: sans-serif; font-size: 14px; background: #f5f5f5; }
header { background: #333; color: #fff; padding: 10px 20px; display: flex; align-items: center; gap: 20px; }
header h1 { font-size: 18px; }
header h1 small { font-size: 12px; color: #aaa; }
nav a { color: #fff; text-decoration: none; margin-right: 15px; }
nav a:hover { color: #ffd; }
main { padding: 20px; }

/* 페이지 헤더 */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.page-header h2 { font-size: 18px; }

/* 버튼 */
.btn { background: #333; color: #fff; padding: 6px 14px; text-decoration: none; border-radius: 4px; font-size: 13px; }
.btn:hover { background: #555; }

/* 테이블 */
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 8px 12px; border: 1px solid #ddd; text-align: left; }
th { background: #f0f0f0; font-weight: bold; }
tr:hover { background: #fafafa; }
td.empty { text-align: center; color: #999; padding: 20px; }
td a { color: #333; text-decoration: none; }
td a:hover { text-decoration: underline; }

/* 대시보드 카드 */
.dashboard { display: flex; gap: 15px; margin-top: 15px; flex-wrap: wrap; }
.card { background: #fff; border: 1px solid #ddd; border-radius: 4px; padding: 20px; min-width: 150px; text-align: center; }
.card h3 { font-size: 14px; color: #666; margin-bottom: 8px; }
.card .count { font-size: 32px; font-weight: bold; color: #333; margin-bottom: 10px; }
.card a { font-size: 12px; color: #666; text-decoration: none; }
.card a:hover { text-decoration: underline; }

/* 레이아웃 */
.layout { display: flex; min-height: calc(100vh - 44px); }
.sidebar { width: 180px; background: #f8f8f8; border-right: 1px solid #ddd; padding: 10px 0; flex-shrink: 0; }
main { flex: 1; padding: 20px; }

/* 사이드 메뉴 */
.side-menu { list-style: none; }
.side-menu .menu-group { font-weight: bold; padding: 8px 15px 4px; color: #555; font-size: 12px; }
.side-menu .menu-group ul { list-style: none; margin-top: 2px; }
.side-menu .menu-group ul li a { display: block; padding: 5px 15px 5px 25px; color: #333; text-decoration: none; font-weight: normal; font-size: 13px; }
.side-menu .menu-group ul li a:hover { background: #eee; }

/* 탑메뉴 active */
.top-nav a.active { color: #ffd; border-bottom: 2px solid #ffd; }

/* 폼 */
.form { background: #fff; padding: 20px; max-width: 500px; }
.form label { display: block; margin-bottom: 12px; }
.form input, .form select { display: block; width: 100%; margin-top: 4px; padding: 6px 8px; border: 1px solid #ccc; border-radius: 3px; font-size: 14px; }
.form-buttons { margin-top: 20px; display: flex; gap: 10px; }
.form-buttons button { background: #333; color: #fff; border: none; padding: 8px 20px; cursor: pointer; border-radius: 4px; }
.form-buttons button:hover { background: #555; }
.form-buttons a { padding: 8px 20px; color: #333; text-decoration: none; }