/* Base Styles */
:root {
    --primary: #3498db;
    --secondary: #2ecc71;
    --danger: #e74c3c;
    --warning: #f39c12;
    --dark: #2c3e50;
    --light: #ecf0f1;
    --gray: #95a5a6;
}

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

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

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

/* Header Styles */
.header {
    background-color: white;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.logo img {
    height: 50px;
    margin-right: 15px;
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav li {
    margin-right: 15px;
}

.main-nav a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.main-nav a:hover {
    background-color: var(--primary);
    color: white;
}

.main-nav a i {
    margin-right: 5px;
}

/* Footer Styles */
.footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 50px;
    color: var(--gray);
    font-size: 14px;
}

/* Login Page */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.login-container {
    width: 100%;
    max-width: 500px;
    padding: 0 20px;
}

.login-box {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.login-box h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--dark);
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    outline: none;
}

/* Button Styles */
.btn {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 14px;
}

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

.btn-secondary:hover {
    background-color: #27ae60;
}

.btn-danger {
    background-color: var(--danger);
}

.btn-danger:hover {
    background-color: #c0392b;
}

/* Table Styles */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

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

th {
    background-color: var(--primary);
    color: white;
    font-weight: 500;
}

tr:hover {
    background-color: #f5f5f5;
}

/* Card Styles */
.stat-card {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    text-align: center;
    margin-bottom: 20px;
}

.stat-card h3 {
    color: var(--gray);
    font-size: 16px;
    margin-bottom: 10px;
}

.stat-card p {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
}

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

.balance-card {
    padding: 15px;
    border-radius: 8px;
    color: white;
    text-align: center;
    margin-bottom: 15px;
}

.balance-card h4 {
    margin-bottom: 10px;
    font-size: 16px;
}

.balance-card p {
    font-size: 24px;
    font-weight: 700;
}

.balance-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.sick { background-color: var(--primary); }
.casual { background-color: var(--secondary); }
.earned { background-color: var(--warning); }
.lop { background-color: var(--danger); }

/* Checkbox Styles */
.employee-select {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 10px;
    background-color: white;
}

.checkbox-item {
    margin-bottom: 10px;
}

.checkbox-item input {
    margin-right: 10px;
}

/* Alert Styles */
.alert {
    padding: 10px 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.alert-danger {
    background-color: #fdecea;
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

.alert-success {
    background-color: #e8f5e9;
    color: var(--secondary);
    border-left: 4px solid var(--secondary);
}

/* Info Box */
.info-box {
    background-color: #e3f2fd;
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    border-left: 4px solid var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
    .main-nav ul {
        flex-direction: column;
    }
    
    .main-nav li {
        margin-bottom: 10px;
    }
    
    .stats-grid, .balance-cards {
        grid-template-columns: 1fr;
    }
}

/* Filter Section */
.filter-section {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 30px;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.filter-actions {
    display: flex;
    gap: 10px;
}

.btn-export {
    background-color: #27ae60;
}

.btn-export:hover {
    background-color: #219653;
}

/* Table improvements */
table {
    margin-top: 20px;
}

th {
    position: sticky;
    top: 0;
}

/* Responsive tables */
@media (max-width: 768px) {
    table {
        display: block;
        overflow-x: auto;
    }
}