/* ===== Variables ===== */
:root {
    --sidebar-width: 240px;
    --navbar-height: 56px;
    --primary: #4361ee;
    --primary-light: #eef0ff;
    --primary-dark: #3a56d4;
    --success: #2ec4b6;
    --warning: #ff9f1c;
    --danger: #e63946;
    --info: #4cc9f0;
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #868e96;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.1);
    --transition: all 0.2s ease;
}

/* ===== Base ===== */
body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-800);
    overflow-x: hidden;
}

/* ===== Top Navbar ===== */
.top-navbar {
    height: var(--navbar-height);
    z-index: 1030;
    box-shadow: var(--shadow-sm);
}
.top-navbar .navbar-brand {
    font-size: 1.1rem;
    color: var(--primary);
}

/* ===== Sidebar ===== */
.sidebar {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--navbar-height));
    background: #fff;
    border-right: 1px solid var(--gray-200);
    overflow-y: auto;
    z-index: 1020;
    transition: transform 0.3s ease;
}
.sidebar-inner {
    padding: 16px 0;
}
.sidebar-heading {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 20px 20px 6px;
}
.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}
.sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 20px;
    color: var(--gray-700);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0;
    transition: var(--transition);
}
.sidebar-link i {
    font-size: 1.1rem;
    width: 22px;
    text-align: center;
    color: var(--gray-500);
    transition: var(--transition);
}
.sidebar-link:hover {
    background: var(--gray-100);
    color: var(--primary);
}
.sidebar-link:hover i {
    color: var(--primary);
}
.sidebar-link.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
    border-right: 3px solid var(--primary);
}
.sidebar-link.active i {
    color: var(--primary);
}

/* ===== Main Content ===== */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--navbar-height);
    min-height: calc(100vh - var(--navbar-height));
}

/* ===== Cards ===== */
.card {
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.card:hover {
    box-shadow: var(--shadow);
}
.card-header {
    background: transparent;
    border-bottom: 1px solid var(--gray-200);
    font-weight: 600;
    padding: 16px 20px;
}
.card-body {
    padding: 20px;
}

/* ===== Summary Cards (Dashboard) ===== */
.summary-card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow: hidden;
}
.summary-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}
.summary-card .card-body {
    padding: 24px;
}
.summary-card .summary-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}
.summary-card .summary-value {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}
.summary-card .summary-label {
    font-size: 0.8rem;
    color: var(--gray-600);
    margin-top: 2px;
}
.bg-primary-light { background-color: var(--primary-light); color: var(--primary); }
.bg-success-light { background-color: #e8f8f5; color: var(--success); }
.bg-warning-light { background-color: #fff8e1; color: var(--warning); }
.bg-danger-light { background-color: #fde8ea; color: var(--danger); }
.bg-info-light { background-color: #e3f7fd; color: var(--info); }

/* ===== Tables ===== */
.table {
    font-size: 0.875rem;
}
.table thead th {
    font-weight: 600;
    color: var(--gray-700);
    border-bottom: 2px solid var(--gray-200);
    white-space: nowrap;
    padding: 12px 16px;
    background: var(--gray-50);
}
.table tbody td {
    padding: 12px 16px;
    vertical-align: middle;
    color: var(--gray-700);
}
.table-hover tbody tr:hover {
    background: var(--primary-light);
}

/* ===== Badges ===== */
.badge {
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
}

/* ===== Buttons ===== */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
    padding: 8px 16px;
    transition: var(--transition);
}
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}
.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}
.btn-outline-primary:hover {
    background: var(--primary);
    border-color: var(--primary);
}

/* ===== Forms ===== */
.form-control, .form-select {
    border-radius: var(--border-radius-sm);
    border-color: var(--gray-300);
    font-size: 0.875rem;
    padding: 8px 12px;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}
.form-label {
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--gray-700);
    margin-bottom: 4px;
}
.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}
.form-switch .form-check-input {
    width: 2.5em;
    height: 1.3em;
}

/* ===== Filter Bar ===== */
.filter-bar {
    background: #fff;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-200);
    padding: 16px 20px;
    margin-bottom: 20px;
}

/* ===== Quick Target Buttons ===== */
.quick-target-btn {
    border: 1px dashed var(--gray-300);
    border-radius: var(--border-radius-sm);
    padding: 12px 16px;
    background: #fff;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--gray-600);
    font-size: 0.85rem;
}
.quick-target-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}
.quick-target-btn i {
    display: block;
    font-size: 1.5rem;
    margin-bottom: 4px;
}

/* ===== Status Dot ===== */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}
.status-dot.active { background: var(--success); }
.status-dot.inactive { background: var(--gray-400); }
.status-dot.error { background: var(--danger); }

/* ===== Offcanvas ===== */
.offcanvas {
    width: 480px !important;
}
.offcanvas-header {
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 20px;
}
.offcanvas-body {
    padding: 20px;
}

/* ===== Page Header ===== */
.page-header {
    margin-bottom: 24px;
}
.page-header h4 {
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}
.page-header p {
    color: var(--gray-600);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--gray-500);
}
.empty-state i {
    font-size: 3rem;
    margin-bottom: 12px;
    display: block;
}

/* ===== Expiration Type Toggle ===== */
.exp-type-row {
    display: flex;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
}
.exp-type-row:last-child {
    border-bottom: none;
}
.exp-type-label {
    font-weight: 500;
    font-size: 0.875rem;
    min-width: 180px;
}

/* ===== Group Card ===== */
.group-card {
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background: #fff;
}
.group-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}
.group-card .group-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 1.2rem;
}
.group-card .group-name {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 4px;
}
.group-card .group-count {
    font-size: 0.8rem;
    color: var(--gray-500);
}

/* ===== Pagination ===== */
.pagination .page-link {
    border-radius: var(--border-radius-sm);
    margin: 0 2px;
    font-size: 0.85rem;
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}
.pagination .page-item.active .page-link {
    background: var(--primary);
    border-color: var(--primary);
}

/* ===== Chart Card ===== */
.chart-card .card-body {
    padding: 16px;
}

/* ===== Sticky Footer Form ===== */
.sticky-bottom-form {
    position: sticky;
    bottom: 0;
    background: #fff;
    border-top: 1px solid var(--gray-200);
    padding: 16px 20px;
    box-shadow: 0 -2px 8px rgba(0,0,0,0.06);
    z-index: 10;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* ===== Toast ===== */
.toast-container {
    z-index: 9999;
}

/* ===== Scrollbar ===== */
.sidebar::-webkit-scrollbar {
    width: 4px;
}
.sidebar::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 2px;
}

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.3);
        z-index: 1019;
    }
    .sidebar-overlay.show {
        display: block;
    }
    .main-content {
        margin-left: 0;
    }
    .offcanvas {
        width: 100% !important;
    }
}

@media (max-width: 575.98px) {
    .summary-card .summary-value {
        font-size: 1.3rem;
    }
    .page-header h4 {
        font-size: 1.1rem;
    }
}