/* ============================================
   DTU Th.M 학사관리 시스템 - 메인 스타일
   ============================================ */

:root {
    --primary: #2c3e7a;
    --primary-dark: #1a2654;
    --sidebar-width: 250px;
    --navbar-height: 56px;
    --text-dark: #333;
    --bg-light: #f4f6f9;
    --sidebar-bg: #2c3e50;
    --sidebar-hover: #34495e;
    --sidebar-active: #1abc9c;
}

/* 전체 레이아웃 */
body {
    font-family: 'Segoe UI', 'Noto Sans KR', sans-serif;
    background-color: var(--bg-light);
    margin: 0;
    padding: 0;
}

.wrapper {
    display: flex;
    margin-top: var(--navbar-height);
    min-height: calc(100vh - var(--navbar-height) - 60px);
}

/* 상단 네비게이션 */
.navbar {
    background-color: var(--primary) !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 1030;
}

.navbar-brand {
    font-size: 1rem;
    font-weight: 600;
}

.navbar-logo {
    height: 32px;
    width: 32px;
    object-fit: contain;
    border-radius: 50%;
    background: white;
    padding: 2px;
}

/* 사이드바 */
.sidebar {
    width: var(--sidebar-width);
    height: calc(100vh - var(--navbar-height));
    background-color: var(--sidebar-bg);
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1020;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

/* 사이드바 스크롤바 스타일 */
.sidebar::-webkit-scrollbar {
    width: 6px;
}
.sidebar::-webkit-scrollbar-track {
    background: var(--sidebar-bg);
}
.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
    border-radius: 3px;
}
.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.4);
}

/* 모바일 사이드바 내 사용자 메뉴 */
.sidebar-user-mobile {
    background-color: var(--primary-dark);
    flex-shrink: 0;
}

.sidebar-menu {
    padding: 10px 0;
    flex: 1;
    overflow-y: auto;
}

.menu-section {
    margin-bottom: 5px;
}

.menu-header {
    color: #8e9aaf;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 12px 20px 5px;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 10px 20px;
    color: #bdc3c7;
    text-decoration: none;
    font-size: 0.88rem;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.menu-item:hover {
    background-color: var(--sidebar-hover);
    color: #fff;
    text-decoration: none;
}

.menu-item.active {
    background-color: rgba(26, 188, 156, 0.1);
    color: var(--sidebar-active);
    border-left-color: var(--sidebar-active);
}

.menu-item i {
    width: 22px;
    margin-right: 10px;
    text-align: center;
    font-size: 0.9rem;
}

/* 콘텐츠 영역 */
.content-area {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    padding: 15px;
}

/* 푸터 */
.footer {
    margin-left: var(--sidebar-width);
    background-color: #fff;
    border-top: 1px solid #dee2e6;
    font-size: 0.8rem;
}

/* 카드 스타일 */
.card {
    border: none;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
    border-radius: 8px;
    margin-bottom: 20px;
}

.card-header {
    background-color: #fff;
    border-bottom: 2px solid var(--primary);
    font-weight: 600;
    padding: 12px 20px;
}

/* 대시보드 통계 카드 */
.stat-card {
    border-radius: 10px;
    padding: 20px;
    color: #fff;
    text-align: center;
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-3px);
}

.stat-card .stat-number {
    font-size: 2.2rem;
    font-weight: 700;
}

.stat-card .stat-label {
    font-size: 0.85rem;
    opacity: 0.9;
}

.stat-card.bg-enrolled { background: linear-gradient(135deg, #667eea, #764ba2); }
.stat-card.bg-leave    { background: linear-gradient(135deg, #f093fb, #f5576c); }
.stat-card.bg-tuition  { background: linear-gradient(135deg, #4facfe, #00f2fe); }
.stat-card.bg-total    { background: linear-gradient(135deg, #43e97b, #38f9d7); }

/* 테이블 */
.table th {
    background-color: #f8f9fa;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    border-bottom: 2px solid var(--primary);
}

.table td {
    font-size: 0.88rem;
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: #eef2ff;
}

/* 상태 뱃지 */
.badge-enrolled  { background-color: #28a745; }
.badge-on_leave  { background-color: #ffc107; color: #333; }
.badge-expelled  { background-color: #dc3545; }
.badge-graduated { background-color: #17a2b8; }
.badge-completed { background-color: #6c757d; }

.badge-unpaid  { background-color: #dc3545; }
.badge-paid    { background-color: #28a745; }
.badge-partial { background-color: #ffc107; color: #333; }
.badge-overdue { background-color: #c0392b; }

/* 폼 스타일 */
.form-label {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-dark);
}

.form-label .required {
    color: #dc3545;
    margin-left: 2px;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.15rem rgba(44, 62, 122, 0.25);
}

/* 검색 영역 */
.search-box {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

/* 버튼 */
.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* 로그인 페이지 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, #1a2654 100%);
}

.login-box {
    background: #fff;
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-box .logo-area {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo {
    max-width: 320px;
    width: 100%;
    height: auto;
}

.login-box .logo-area h4 {
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 5px;
}

.login-box .logo-area p {
    color: #888;
    font-size: 0.9rem;
}

/* 데스크톱 네비바 메뉴 */
.navbar-nav-desktop .nav-link {
    padding: 0.4rem 0.6rem;
    font-size: 0.9rem;
}

/* 반응형: 768px 이하 */
@media (max-width: 767.98px) {
    .sidebar {
        width: var(--sidebar-width);
        transform: translateX(-100%);
        z-index: 1040;
    }

    .sidebar.show {
        transform: translateX(0);
        box-shadow: 4px 0 15px rgba(0,0,0,0.3);
    }

    .content-area {
        margin-left: 0;
        width: 100%;
    }

    .footer {
        margin-left: 0;
    }

    .stat-card .stat-number {
        font-size: 1.5rem;
    }

    /* 사이드바 열릴 때 배경 오버레이 */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--navbar-height));
        background: rgba(0,0,0,0.5);
        z-index: 1035;
    }

    .sidebar-overlay.show {
        display: block;
    }
}

/* 인쇄 */
@media print {
    .sidebar, .navbar, .footer, .no-print {
        display: none !important;
    }
    .content-area {
        margin-left: 0;
        width: 100%;
    }
}