:root {
    --sidebar-width: 250px;
    --sidebar-bg: #FFFFFF;
    --sidebar-text: #7C8389; /* sub-light01 */
    --sidebar-active: #2160D0; /* primary */
    --sidebar-active-bg: #E9EFFA; /* primary-light02 */
    --primary-color: #2160D0; /* primary */
    --body-bg: #F9FAFA; /* main-light06 */
    --text-color: #24313A; /* sub */
    --border-color: #E5E6E7; /* sub-light05 */
}

body {
    background-color: var(--body-bg);
    color: var(--text-color);
    font-family: 'Pretendard Variable', 'Inter', system-ui, -apple-system, sans-serif;
}

.page {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: all 0.3s;
    border-right: 1px solid var(--border-color);
}

.sidebar .top-row {
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar .navbar-brand {
    color: var(--text-color);
    font-weight: 600;
    font-size: 1.1rem;
    text-decoration: none;
}

.sidebar .nav-scrollable {
    flex-grow: 1;
    overflow-y: auto;
    padding-top: 1rem;
}

.sidebar .nav-item {
    margin-bottom: 0.25rem;
}

.sidebar .nav-link {
    color: var(--sidebar-text);
    padding: 0.75rem 1.0rem;
    display: flex;
    align-items: center;
    transition: all 0.2s;
    border-radius: 4px;
    margin: 4px 12px;
    font-weight: 500;
}

.sidebar .nav-link:hover {
    color: var(--sidebar-active);
    background-color: var(--sidebar-active-bg);
}

.sidebar .nav-link.active {
    color: var(--sidebar-active);
    background-color: var(--sidebar-active-bg);
}

.sidebar .nav-link i {
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
}

/* Main Content Styling */
main {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
    transition: margin-left 0.3s;
}

/* Top Row (Header in Main) */
main .top-row {
    display: none; /* Hide default top-row link provided by template */
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    main {
        margin-left: 0;
    }
}

/* Utility Overrides */
.card {
    border: 1px solid var(--border-color);
    box-shadow: 0 0 20px 0 rgba(76, 87, 125, 0.02);
    border-radius: 4px;
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    padding: 1.25rem 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

h1 {
    font-weight: 700;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.table {
    background: white;
    border: none;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0px 1px 0px 0px rgba(0, 0, 0, 0.05); /* effect_0213HR from design */
}

.table thead th {
    background-color: #F2F6F6; /* main-light05 */
    border-bottom: none;
    font-family: 'Inter', sans-serif; /* style/Thead */
    font-weight: 400;
    color: var(--text-color); /* sub */
    font-size: 14px;
    line-height: 1.5em;
    padding: 1rem; /* approx 16px */
}

.table tbody td {
    padding: 1rem; /* 8px 16px in design, keeping 1rem for spacing comfortably */
    vertical-align: middle;
    color: var(--text-color);
    font-family: 'Pretendard Variable', sans-serif;
    font-size: 14px; /* Defaulting to base14 for readability */
    border-bottom: 1px solid rgba(0, 0, 0, 0.05); /* Using shadow as border effect */
}

.btn {
    border-radius: 4px; /* from design */
    padding: 0.5rem 1rem;
    font-weight: 500;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #FFFFFF;
}

.btn-success {
    background-color: #0F8266;
    border-color: #0F8266;
    color: #FFFFFF;
}

.btn-danger {
    background-color: #C00000;
    border-color: #C00000;
    color: #FFFFFF;
}

.btn-warning {
    background-color: #F7B814;
    border-color: #F7B814;
    color: #FFFFFF;
}

.btn-info {
    background-color: #881FF1; /* 'special' color */
    border-color: #881FF1;
    color: #FFFFFF;
}