:root {
    --gold: #D4AF37;
    --dark: #1A1A1A;
    --white: #FFFFFF;
    --light-grey: #f4f4f4;
    --red: #e74c3c;
    --green: #2ecc71;
}

body {
    font-family: 'Open Sans', sans-serif;
    background-color: var(--light-grey);
    margin: 0;
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--dark);
    color: var(--white);
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.sidebar h2 {
    color: var(--gold);
    text-align: center;
    font-family: 'Playfair Display', serif;
    margin-bottom: 40px;
}

.sidebar a {
    color: var(--white);
    text-decoration: none;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 4px;
    transition: 0.3s;
    font-weight: 600;
}

.sidebar a:hover, .sidebar a.active {
    background-color: var(--gold);
    color: var(--dark);
}

.sidebar a i { margin-right: 10px; }

/* Main Content */
.main-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-left: 5px solid var(--gold);
}

.card h3 { margin-top: 0; color: var(--grey-text); }
.card .number { font-size: 2rem; font-weight: bold; color: var(--dark); }

/* Forms & Tables */
form { background: var(--white); padding: 25px; border-radius: 8px; max-width: 600px; }
input, select, textarea { width: 100%; padding: 10px; margin: 10px 0; border: 1px solid #ddd; border-radius: 4px; }
button { background: var(--gold); color: white; border: none; padding: 12px 20px; cursor: pointer; font-weight: bold; }
button:hover { background: var(--dark); }

table { width: 100%; border-collapse: collapse; background: var(--white); }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #ddd; }
th { background-color: var(--dark); color: var(--white); }

/* Login Page Specific */
body.login-page {
    justify-content: center;
    align-items: center;
    background: var(--dark);
}
.login-box {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    width: 100%;
    max-width: 400px;
    text-align: center;
    border-top: 5px solid var(--gold);
}
.error-msg { color: var(--red); background: #fce4e4; padding: 10px; border-radius: 4px; margin-bottom: 15px; }
.success-msg { color: var(--green); background: #e8f8f5; padding: 10px; border-radius: 4px; margin-bottom: 15px; }