/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1rem;
    opacity: 0.9;
}

/* Tabs */
.tabs {
    display: flex;
    background: #f8f9fa;
    border-bottom: 2px solid #e0e0e0;
    overflow-x: auto;
}

.tab-btn {
    flex: 1;
    padding: 15px 20px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.tab-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
}

.tab-btn.active {
    background: white;
    color: #667eea;
    border-bottom: 3px solid #667eea;
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 30px;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Card */
.card {
    background: white;
}

.card h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.card h3 {
    color: #333;
    margin: 20px 0 10px;
    font-size: 1.2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-group input[type="text"],
.form-group input[type="date"],
.form-group input[type="file"],
.form-group select {
    width: 100%;
    padding: 10px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

.month-selector {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 10px;
}

.input-group {
    display: flex;
    gap: 10px;
}

.input-group input {
    flex: 1;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
    margin-right: 10px;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-success {
    background: #28a745;
    color: white;
    margin-right: 10px;
}

.btn-success:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(40, 167, 69, 0.4);
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.875rem;
}

/* Duties List */
.duties-list {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid #e0e0e0;
}

.duty-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    margin-bottom: 10px;
    background: #f8f9fa;
    border-radius: 6px;
    border-left: 4px solid #667eea;
}

.duty-item.qualifying {
    border-left-color: #28a745;
    background: #f0f9f4;
}

.duty-info {
    flex: 1;
}

.duty-date {
    font-weight: 600;
    color: #333;
    margin-bottom: 4px;
}

.duty-meta {
    font-size: 0.875rem;
    color: #666;
}

.duty-share {
    font-weight: 500;
    margin-right: 15px;
}

.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: 8px;
}

.badge-qualifying {
    background: #28a745;
    color: white;
}

.badge-normal {
    background: #6c757d;
    color: white;
}

/* Employee List */
.employee-list {
    margin-top: 20px;
}

.employee-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    margin-bottom: 10px;
    background: #f8f9fa;
    border-radius: 6px;
}

.employee-name {
    font-weight: 500;
    color: #333;
}

/* Calculation Results */
#calculation-results {
    margin-top: 30px;
}

.result-card {
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 5px solid #667eea;
}

.result-card h3 {
    color: #667eea;
    margin-bottom: 15px;
}

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

.result-item {
    background: white;
    padding: 15px;
    border-radius: 6px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.result-label {
    font-size: 0.875rem;
    color: #666;
    margin-bottom: 5px;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
}

.result-value.success {
    color: #28a745;
}

.result-value.warning {
    color: #ffc107;
}

.result-value.danger {
    color: #dc3545;
}

.bonus-total {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    margin-top: 20px;
}

.bonus-total h4 {
    font-size: 1rem;
    margin-bottom: 10px;
    opacity: 0.9;
}

.bonus-total .amount {
    font-size: 2.5rem;
    font-weight: 700;
}

.threshold-warning {
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 6px;
    padding: 15px;
    margin: 20px 0;
}

.threshold-warning h4 {
    color: #856404;
    margin-bottom: 5px;
}

.threshold-warning p {
    color: #856404;
    margin: 0;
}

/* Settings */
.settings-section {
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e0e0e0;
}

.settings-section:last-child {
    border-bottom: none;
}

.info-box {
    background: #e7f3ff;
    border-left: 4px solid #2196f3;
    padding: 20px;
    border-radius: 6px;
    margin-top: 15px;
}

.info-box h4 {
    color: #1976d2;
    margin: 15px 0 10px;
}

.info-box h4:first-child {
    margin-top: 0;
}

.info-box ul {
    margin-left: 20px;
}

.info-box li {
    margin-bottom: 5px;
}

.info-box p {
    margin-top: 10px;
}

/* Utility Classes */
.text-muted {
    color: #6c757d;
    font-style: italic;
}

.text-warning {
    color: #856404;
    font-weight: 500;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #333;
    color: white;
    padding: 15px 25px;
    border-radius: 6px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    background: #28a745;
}

.toast.error {
    background: #dc3545;
}

.toast.info {
    background: #17a2b8;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .tab-content {
        padding: 20px;
    }

    .month-selector {
        grid-template-columns: 1fr;
    }

    .result-summary {
        grid-template-columns: 1fr;
    }

    .input-group {
        flex-direction: column;
    }

    .tabs {
        overflow-x: auto;
    }

    .tab-btn {
        font-size: 0.875rem;
        padding: 12px 15px;
    }

    .bonus-total .amount {
        font-size: 2rem;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        padding: 0;
    }

    .container {
        box-shadow: none;
    }

    .tabs,
    .btn,
    .form-group {
        display: none;
    }

    .tab-content {
        display: block !important;
        padding: 20px 0;
    }
}