:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --background-color: #f3f4f6;
    --text-color: #1f2937;
    --white: #ffffff;
    --danger: #dc2626;
    --success: #16a34a;
    --warning: #ca8a04;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Login Styles */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h2 {
    color: var(--primary-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    font-size: 16px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    text-decoration: none;
    transition: background-color 0.3s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    width: 100%;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
}

.alert {
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 4px;
    text-align: center;
}

.alert-danger {
    background-color: #fee2e2;
    color: var(--danger);
    border: 1px solid #fecaca;
}

/* Dashboard & Layout */
.navbar {
    background-color: var(--white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    align-items: center;
    justify-content: flex-end;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 14px;
    white-space: nowrap;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-links a i {
    font-size: 14px;
}

.nav-links a:hover {
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.08);
}

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

.card {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.card h3 {
    margin-bottom: 10px;
}

.card a {
    display: inline-block;
    margin-top: 10px;
    text-decoration: none;
    font-weight: bold;
}

.card .btn-primary {
    color: var(--white);
}