:root {
    --bg: #f4f6f9;
    --sidebar-bg: #1f2933;
    --sidebar-active: #111827;
    --primary: #2563eb;
    --primary-soft: #dbeafe;
    --text-main: #111827;
    --text-muted: #6b7280;
    --border-soft: #e5e7eb;
    --danger: #dc2626;
    --success: #16a34a;
    --warning: #d97706;
    --white: #ffffff;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
}

a {
    color: inherit;
    text-decoration: none;
}

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

.sidebar {
    width: 240px;
    background-color: var(--sidebar-bg);
    color: var(--white);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-weight: 600;
    letter-spacing: 0.03em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-nav {
    flex: 1;
    padding: 0.75rem 0.5rem;
}

.nav-section-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(249, 250, 251, 0.6);
    padding: 0.75rem 1rem 0.25rem;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.6rem 1.1rem;
    margin: 0.1rem 0.4rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    color: rgba(249, 250, 251, 0.85);
    transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-link:hover {
    background-color: rgba(15, 23, 42, 0.7);
}

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

.nav-link span {
    margin-left: 0.5rem;
}

.sidebar-footer {
    padding: 0.9rem 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.85rem;
    color: rgba(249, 250, 251, 0.7);
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    background-color: var(--white);
    border-bottom: 1px solid var(--border-soft);
    position: sticky;
    top: 0;
    z-index: 10;
}

.topbar-title {
    font-size: 1.05rem;
    font-weight: 500;
}

.topbar-user {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.content {
    padding: 1.5rem;
}

.page-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.page-title h1 {
    margin: 0;
    font-size: 1.3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.45rem 0.9rem;
    border-radius: 0.45rem;
    border: 1px solid transparent;
    font-size: 0.88rem;
    cursor: pointer;
    background-color: var(--primary);
    color: var(--white);
    transition: background-color 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
    background-color: #1d4ed8;
}

.btn-secondary {
    background-color: var(--white);
    color: var(--text-main);
    border-color: var(--border-soft);
}

.btn-secondary:hover {
    background-color: #f3f4f6;
}

.btn-danger {
    background-color: var(--danger);
}

.btn-danger:hover {
    background-color: #b91c1c;
}

.btn-sm {
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.card {
    background-color: var(--white);
    border-radius: 0.9rem;
    padding: 1rem 1.1rem;
    border: 1px solid var(--border-soft);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
}

.card-title {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.card-value {
    font-size: 1.4rem;
    font-weight: 600;
}

.card-pill {
    font-size: 0.75rem;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    background-color: var(--primary-soft);
    color: var(--primary);
}

.table-wrapper {
    margin-top: 1.25rem;
    background-color: var(--white);
    border-radius: 0.9rem;
    border: 1px solid var(--border-soft);
    overflow: hidden;
}

.table-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.table thead {
    background-color: #f9fafb;
}

.table th,
.table td {
    padding: 0.6rem 0.9rem;
    border-bottom: 1px solid var(--border-soft);
    text-align: left;
}

.table th {
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    font-size: 0.75rem;
}

.badge-success {
    background-color: #dcfce7;
    color: #166534;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background-color: #fee2e2;
    color: #b91c1c;
}

.form-card {
    max-width: 720px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.form-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.form-input,
.form-select,
.form-textarea {
    padding: 0.45rem 0.55rem;
    border-radius: 0.45rem;
    border: 1px solid var(--border-soft);
    font-size: 0.88rem;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary-soft);
}

.form-textarea {
    min-height: 80px;
    resize: vertical;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 1.25rem;
}

.alert {
    padding: 0.6rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.alert-error {
    background-color: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fee2e2;
}

.alert-success {
    background-color: #ecfdf3;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top left, #e0f2fe, transparent 55%), radial-gradient(circle at bottom right, #fee2e2, transparent 55%), #f3f4f6;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background-color: rgba(255, 255, 255, 0.96);
    border-radius: 1rem;
    padding: 1.8rem 1.9rem;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.18);
    border: 1px solid rgba(148, 163, 184, 0.25);
}

.login-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 0 0.35rem;
    font-size: 1.25rem;
}

.login-subtitle {
    margin: 0 0 1.25rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.login-footer {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

@media (max-width: 800px) {
    .layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        flex-direction: row;
        overflow-x: auto;
    }

    .sidebar-header,
    .sidebar-footer {
        display: none;
    }

    .sidebar-nav {
        display: flex;
    }

    .nav-link {
        white-space: nowrap;
    }
}