:root {
    --primary-color: #0f172a; /* Dark Slate */
    --secondary-color: #334155; /* Slate */
    --accent-color: #3b82f6; /* Blue */
    --text-light: #f8fafc;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --bg-light: #f1f5f9;
    --success: #10b981;
    --danger: #ef4444;
    --border-color: #e2e8f0;
}

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

body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    font-size: 14px;
}

.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--primary-color);
    color: var(--text-light);
    display: flex;
    flex-direction: column;
}

.brand {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: #020617;
    font-size: 0.9rem;
}

.sidebar ul {
    list-style: none;
    margin-top: 20px;
}

.sidebar ul li {
    padding: 15px 20px;
    cursor: pointer;
    transition: 0.3s;
    border-left: 3px solid transparent;
}

.sidebar ul li:hover, .sidebar ul li.active {
    background-color: var(--secondary-color);
    border-left-color: var(--accent-color);
}

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

/* Main Content */
.content {
    flex: 1;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 15px 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

/* Sections */
.view-section {
    display: none; /* Hidden by default */
    animation: fadeIn 0.5s;
}

.active-section {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

.card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
}

.card h3 {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
}

.card p {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-dark);
}

/* Biometrics Panel */
.biometric-panel {
    background: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
}

.biometric-panel h3 {
    margin-bottom: 15px;
    color: var(--text-dark);
}

.scanner-status {
    background-color: var(--bg-light);
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    font-family: monospace;
    color: var(--text-muted);
}

.scanner-status.scanning {
    color: var(--accent-color);
    background-color: #eff6ff;
    border-color: #bfdbfe;
}

.scanner-status.success {
    color: var(--success);
    background-color: #f0fdf4;
    border-color: #bbf7d0;
}

.controls {
    display: flex;
    gap: 10px;
}

.controls input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    outline: none;
}

.controls input:focus {
    border-color: var(--accent-color);
}

/* Buttons */
button {
    padding: 10px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    color: white;
    font-weight: bold;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}

button:hover {
    opacity: 0.9;
}

.btn-primary { background-color: var(--accent-color); }
.btn-danger { background-color: var(--danger); }
.btn-success { background-color: var(--success); }
.btn-secondary { background-color: var(--secondary-color); }

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border-radius: 8px;
    overflow: hidden;
}

.data-table th, .data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background-color: #f8fafc;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
}

.data-table tr:last-child td {
    border-bottom: none;
}

/* Forms */
.form-card, .payroll-calculator {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.form-card h3, .payroll-calculator h3 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    outline: none;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--accent-color);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.result-box {
    margin-top: 20px;
    padding: 15px;
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 4px;
}

/* Modal Styles */
.modal {
    display: none; 
    position: fixed; 
    z-index: 1000; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    overflow: auto; 
    background-color: rgba(0,0,0,0.5); 
}

.modal-content {
    background-color: #fefefe;
    margin: 10% auto; 
    padding: 20px;
    border: 1px solid var(--border-color);
    width: 50%; 
    border-radius: 8px;
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

.tag-late {
    background-color: var(--danger);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-left: 8px;
    vertical-align: middle;
}