:root {
    --brand-dark: #00274A;
    --brand-light-blue: #3CBADC;
    --brand-green: #5BA62C;
    --bg-color: #f4f7f6;
    --text-color: #333;
    --white: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    display: flex;
    height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.sidebar {
    width: 250px;
    background-color: var(--brand-dark);
    color: var(--white);
    display: flex;
    flex-direction: column;
}

.sidebar .logo {
    padding: 20px;
    background-color: rgba(0,0,0,0.2);
    text-align: center;
}

.sidebar nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding-top: 20px;
}

.sidebar nav a {
    color: var(--white);
    text-decoration: none;
    padding: 15px 20px;
    transition: 0.3s;
    border-left: 4px solid transparent;
}

.sidebar nav a:hover, .sidebar nav a.active {
    background-color: rgba(255,255,255,0.1);
    border-left: 4px solid var(--brand-light-blue);
    color: var(--brand-light-blue);
}

.sidebar nav a i { margin-right: 10px; width: 20px; text-align: center; }

.user-info {
    padding: 20px;
    font-size: 0.9em;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

header {
    background-color: var(--white);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.tab-content { display: none; padding: 30px; }
.tab-content.active { display: block; }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.stat-card h3 { font-size: 1rem; color: #666; margin-bottom: 10px; }
.stat-card p { font-size: 1.8rem; font-weight: bold; }

.money { color: var(--brand-green); }
.highlight { color: var(--brand-light-blue); }

.panel {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.btn-primary {
    background-color: var(--brand-light-blue);
    color: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
}

.btn-primary:hover { background-color: #2a9bbd; }

.btn-secondary {
    background-color: var(--brand-dark);
    color: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th, table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

table th { background-color: #f9f9f9; font-weight: 600; }

.filter-bar { display: flex; gap: 10px; margin-bottom: 20px; }
.filter-bar select, .filter-bar input { padding: 8px; border: 1px solid #ccc; border-radius: 4px; }

/* Modal */
.modal {
    display: none; position: fixed; z-index: 1000;
    left: 0; top: 0; width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.5);
    justify-content: center; align-items: center;
}

.modal-content {
    background-color: var(--white);
    padding: 30px;
    border-radius: 8px;
    width: 600px;
    max-width: 90%;
}

.close { float: right; font-size: 28px; cursor: pointer; color: #aaa; }
.close:hover { color: var(--brand-dark); }

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin: 20px 0;
}

.form-grid label { display: block; margin-bottom: 5px; font-weight: 600; font-size: 0.9em; }
.form-grid input { width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; }

.calc-results {
    background: #f9f9f9;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
}