:root {
    --bg: #eef3f8;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #005baa;
    --primary-dark: #003f7d;
    --sidebar: #0f172a;
    --sidebar-text: #ffffff;
    --border: #e5e7eb;
}

body.dark {
    --bg: #0f172a;
    --card: #1e293b;
    --text: #f8fafc;
    --muted: #cbd5e1;
    --sidebar: #020617;
    --border: #334155;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

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

.sidebar {
    width: 240px;
    background: var(--sidebar);
    color: var(--sidebar-text);
    padding: 25px 20px;
    box-sizing: border-box;
}

.sidebar h2 {
    margin-top: 0;
    margin-bottom: 30px;
    color: white;
}

.sidebar a {
    display: block;
    color: white;
    text-decoration: none;
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.sidebar a:hover {
    background: rgba(255,255,255,0.15);
}

.main {
    flex: 1;
    padding: 30px;
    box-sizing: border-box;
}

.top-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px;
    margin-bottom: 20px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}

.stat-card h3 {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.stat-card p {
    font-size: 24px;
    font-weight: bold;
    margin: 10px 0;
}

.button-link,
button {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    border: none;
    text-decoration: none;
    cursor: pointer;
    margin: 4px;
    font-size: 16px;
    font-weight: 600;
    font-family: Arial, sans-serif;
}

button:hover {
    background: var(--primary-dark);
}

.button-danger {
    background: #c0392b;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
}

th,
td {
    padding: 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

input,
select {
    padding: 10px;
    width: 100%;
    max-width: 420px;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin-bottom: 15px;
}
.footer {
    text-align: center;
    padding: 25px 10px 10px 10px;
    color: var(--muted);
    font-weight: 600;
    background: transparent;
    border: none;
}
.page-wrapper {
    min-height: calc(100vh - 60px);
}
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}