:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --background-color: #f4f6f9;
    --text-color: #333;
    --card-bg: #fff;
    --success-color: #2ecc71;
    --danger-color: #e74c3c;
    --warning-color: #f1c40f;
    --border-radius: 8px;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Navbar Styles */
.top-navbar {
    background-color: var(--primary-color);
    color: #fff;
    display: flex;
    align-items: center;
    padding: 0 20px;
    height: 60px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 10;
}

.navbar-brand {
    font-size: 1.2rem;
    font-weight: bold;
    margin-right: 40px;
}

.navbar-links {
    display: flex;
    gap: 15px;
    flex-grow: 1;
}

.navbar-links a {
    color: #bdc3c7;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 4px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.navbar-links a:hover, .navbar-links a.active {
    background-color: var(--secondary-color);
    color: #fff;
}

/* Main Content Styles */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    background-color: #fff;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.content-wrapper {
    padding: 20px;
    flex-grow: 1;
}

/* Login Page Styles */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background-color: var(--secondary-color);
    width: 100%;
}

.login-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-card h2 {
    text-align: center;
    margin-top: 0;
    color: var(--primary-color);
}

.dashboard-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    box-sizing: border-box;
    width: 100%;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

.btn {
    width: 100%;
    padding: 12px;
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: background-color 0.3s;
    box-sizing: border-box;
}

.btn:hover {
    background-color: #2980b9;
}

.alert {
    padding: 10px;
    background-color: var(--danger-color);
    color: white;
    border-radius: 4px;
    margin-bottom: 20px;
    text-align: center;
}

/* Dashboard Metrics */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.metric-card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-left: 5px solid var(--accent-color);
}

.metric-card.success { border-left-color: var(--success-color); }
.metric-card.danger { border-left-color: var(--danger-color); }
.metric-card.warning { border-left-color: var(--warning-color); }

.metric-title {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.metric-value {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
}

/* Charts Container */
.charts-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.chart-card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}