:root {
    --blue-900: #1f5f9c;
    --blue-800: #2a79be;
    --blue-700: #3a95db;
    --blue-100: #eef7ff;
    --text-main: #17324d;
    --text-soft: #637a93;
    --surface: #ffffff;
    --bg: #f3f8ff;
    --border: #dbe8f7;
}

body {
    background: linear-gradient(145deg, #f2f9ff, #e3f2ff);
    color: var(--text-main);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.app-shell {
    min-height: 100vh;
}

.sidebar {
    min-height: 100vh;
    padding: 1.2rem 1rem;
    background: linear-gradient(180deg, #2b7fc3, #1f6ba8);
    color: #fff;
    box-shadow: 6px 0 20px rgba(11, 59, 117, 0.2);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.brand-mark {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    border-radius: 12px;
    background-color: rgba(255, 255, 255, 0.16);
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.brand-mark-full {
    width: 100%;
    height: auto;
    min-height: 52px;
    padding: 0.6rem 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 0.05rem;
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.25;
}

.sidebar-menu a,
.logout-link {
    color: #f8fbff;
    display: block;
    text-decoration: none;
    padding: 0.65rem 0.9rem;
    border-radius: 10px;
    margin-bottom: 0.35rem;
    transition: all 0.2s ease;
}

.sidebar-menu a:hover,
.logout-link:hover {
    background-color: rgba(255, 255, 255, 0.16);
    color: #fff;
}

.logout-link {
    margin-top: 1.2rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.content {
    min-height: 100vh;
    padding: 1.5rem;
    background: transparent;
}

.topbar {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 0.9rem 1.2rem;
    margin-bottom: 1rem;
    box-shadow: 0 6px 18px rgba(17, 85, 160, 0.08);
}

.topbar-title {
    font-size: 0.85rem;
    color: var(--text-soft);
}

.topbar-user {
    font-weight: 700;
    color: var(--blue-800);
}

h2, h4 {
    color: #123b67;
    font-weight: 700;
}

.card {
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 10px 24px rgba(16, 75, 140, 0.08);
}

.table {
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    border-color: var(--border);
}

table {
    width: 100%;
    background-color: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    border-collapse: collapse;
    overflow: hidden;
}

th {
    background-color: var(--blue-100);
    color: var(--blue-900);
    font-weight: 600;
}

th, td {
    border: 1px solid var(--border);
    padding: 0.7rem 0.85rem;
    vertical-align: middle;
}

form {
    background-color: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1rem;
    box-shadow: 0 8px 18px rgba(19, 86, 157, 0.08);
    max-width: 680px;
}

input, select, textarea {
    width: 100%;
    border: 1px solid #c9ddf3;
    border-radius: 10px;
    padding: 0.5rem 0.65rem;
    margin-top: 0.35rem;
    margin-bottom: 0.9rem;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--blue-700);
    box-shadow: 0 0 0 0.2rem rgba(26, 103, 199, 0.16);
    outline: none;
}

button,
.btn {
    border-radius: 10px;
    font-weight: 600;
    padding: 0.5rem 0.95rem;
}

a {
    color: var(--blue-800);
}

a:hover {
    color: var(--blue-700);
}

.page-link-row {
    display: flex;
    gap: 0.55rem;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .sidebar {
        min-height: auto;
    }

    .content {
        padding: 0.9rem;
    }

    .topbar {
        padding: 0.75rem 0.9rem;
    }
}