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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    background-attachment: fixed;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.main-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    margin-bottom: 20px;
}

.form-section {
    margin-bottom: 30px;
}

label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #333;
    font-size: 1.1em;
}

.employee-select {
    width: 100%;
    padding: 15px;
    font-size: 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.employee-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.employee-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    text-align: center;
}

.employee-info h3 {
    color: #667eea;
    font-size: 1.5em;
    margin-bottom: 5px;
}

.employee-info p {
    color: #666;
    font-size: 0.95em;
}

.current-time {
    text-align: center;
    font-size: 2.5em;
    font-weight: 700;
    color: #333;
    margin: 30px 0;
    font-variant-numeric: tabular-nums;
}

.location-info {
    background: #e8f5e9;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.location-status {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95em;
    color: #2e7d32;
}

.status-icon {
    font-size: 1.5em;
}

.button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 30px 0;
}

.btn {
    padding: 20px;
    font-size: 1.2em;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-check-in {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.btn-check-in:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(56, 239, 125, 0.4);
}

.btn-check-out {
    background: linear-gradient(135deg, #ee0979 0%, #ff6a00 100%);
    color: white;
}

.btn-check-out:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(238, 9, 121, 0.4);
}

.btn-icon {
    font-size: 1.2em;
}

.message {
    padding: 15px;
    border-radius: 10px;
    margin: 20px 0;
    text-align: center;
    font-weight: 500;
    display: none;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.today-summary {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-top: 30px;
}

.today-summary h3 {
    margin-bottom: 15px;
    color: #333;
}

#summary-content {
    display: grid;
    gap: 10px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background: white;
    border-radius: 5px;
}

.summary-label {
    font-weight: 600;
    color: #666;
}

.summary-value {
    color: #333;
    font-weight: 500;
}

.action-links {
    text-align: center;
}

.admin-link {
    display: inline-block;
    padding: 15px 30px;
    background: white;
    color: #667eea;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.admin-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

/* Loading spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive design */
@media (max-width: 600px) {
    .main-card {
        padding: 20px;
    }
    
    header h1 {
        font-size: 2em;
    }
    
    .button-group {
        grid-template-columns: 1fr;
    }
    
    .current-time {
        font-size: 2em;
    }
}