:root {
    --primary: #1e40af;
    --primary-light: #3b82f6;
    --primary-dark: #1e3a8a;
    --success: #10b981;
    --success-dark: #059669;
    --accent: #ef4444;
    --bg-app: #f1f5f9;
    --bg-form: rgba(255, 255, 255, 0.7);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --glass-border: rgba(255, 255, 255, 0.4);
}

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

@keyframes pulse-subtle {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.animate-fade { animation: fadeIn 0.4s ease-out; }
.animate-pulse { animation: pulse-subtle 2s infinite ease-in-out; }
.animate-spin { animation: spin 1s linear infinite; }

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-app);
    color: var(--text-main);
    line-height: 1.5;
    overflow-x: hidden;
}

h1, h2, h3, .logo-text {
    font-family: 'Outfit', sans-serif;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Form Section */
.form-section {
    width: 550px;
    background: var(--bg-form);
    backdrop-filter: blur(10px);
    border-right: 1px solid var(--border);
    padding: 2rem;
    height: 100vh;
    overflow-y: auto;
    position: sticky;
    top: 0;
    box-shadow: 10px 0 15px -3px rgba(0, 0, 0, 0.02);
}

.form-header {
    margin-bottom: 2rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.logo-text span {
    color: var(--text-main);
}

.form-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.header-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
}

.nav-link {
    text-decoration: none;
    font-size: 0.75rem !important;
    padding: 0.4rem 0.8rem !important;
    background: rgba(30, 64, 175, 0.05);
}

.nav-link:hover {
    background: rgba(30, 64, 175, 0.1);
}

/* Employee Selection Header */
.employee-selection-header {
    background: #fff;
    padding: 1rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.selection-row {
    display: flex;
    gap: 0.5rem;
}

.selection-row select {
    flex: 1;
}

.btn-sm {
    padding: 0.5rem !important;
}

.group-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
    color: var(--primary);
}

.form-help-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    background: rgba(30, 64, 175, 0.04);
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    border-left: 2px solid var(--primary-light);
}

.form-group-wrapper {
    margin-bottom: 2rem;
}

.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    color: var(--text-muted);
}

.required-mark {
    color: var(--accent);
    margin-left: 2px;
}

input, select, textarea {
    padding: 0.75rem;
    background-color: #fff;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    transition: all 0.2s;
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

input:read-only {
    background-color: #f1f5f9;
    color: var(--text-muted);
    cursor: not-allowed;
}

/* Buttons */
.primary-btn, .success-btn, .secondary-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s;
    font-size: 0.875rem;
}

.primary-btn {
    background-color: var(--primary);
    color: #fff;
}

.primary-btn:hover:not(:disabled) {
    background-color: var(--primary-dark);
}

.success-btn {
    background-color: var(--success);
    color: #fff;
}

.success-btn:hover:not(:disabled) {
    background-color: var(--success-dark);
}

.secondary-btn {
    background-color: #f1f5f9;
    color: var(--text-main);
}

.secondary-btn:hover {
    background-color: #e2e8f0;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(1);
}

.form-footer {
    margin-top: 2rem;
}

/* Preview Section */
.preview-section {
    flex: 1;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: radial-gradient(circle at top right, #eff6ff, transparent);
    overflow-y: auto;
}

.payslip-card {
    background-color: #fff;
    width: 210mm;
    min-height: 297mm;
    padding: 40px;
    box-shadow: var(--shadow);
    border-radius: 0.5rem;
    display: flex;
    flex-direction: column;
    margin-bottom: 2rem;
}

.payslip-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.company-logo img {
    height: 60px;
    width: auto;
}

.company-details {
    text-align: right;
}

.company-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.company-details p {
    font-size: 0.8125rem;
    color: #333;
    margin-bottom: 2px;
}

.divider {
    height: 3px;
    background-color: #000;
    margin: 15px 0;
}

.document-title {
    text-align: center;
    margin-bottom: 25px;
}

.document-title h2 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 2px;
}

.document-title p {
    font-size: 0.9375rem;
    color: #333;
}

.payslip-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
}

.info-column {
    flex: 1;
}

.info-row {
    margin-bottom: 8px;
    display: flex;
    font-size: 0.875rem;
}

.info-label {
    width: 140px;
    font-weight: 500;
}

.info-value {
    font-weight: 400;
}

.salary-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 40px;
}

.salary-table th {
    background-color: #337ab7;
    color: #fff;
    text-align: left;
    padding: 10px 12px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid #ddd;
}

.salary-table td {
    padding: 8px 12px;
    border: 1px solid #ddd;
    font-size: 0.875rem;
}

.total-row {
    background-color: #f9f9f9;
    font-weight: 600;
}

.net-payable {
    display: flex;
    justify-content: space-between;
    background-color: #dff0d8;
    color: #3c763d;
    padding: 12px 20px;
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: 4px;
    margin-bottom: 40px;
}

.payslip-footer {
    margin-top: auto;
    text-align: center;
    font-style: italic;
    font-size: 0.8125rem;
    color: #666;
}

.preview-actions {
    display: flex;
    gap: 1rem;
    width: 210mm;
    justify-content: flex-end;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: #fff;
    width: 450px;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.success-icon {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
}

.modal-lg {
    width: 650px;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h3 {
    font-size: 1.25rem;
    color: var(--text-main);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-body {
    margin-bottom: 2rem;
    color: var(--text-muted);
    font-size: 0.9375rem;
}

.confirmation-summary {
    margin-top: 1.5rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 0.5rem;
}

.confirmation-summary p {
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background-color: #fff;
    }
    
    .app-container {
        display: block;
    }
    
    .preview-section {
        padding: 0;
        background: none;
        overflow: visible;
    }
    
    .payslip-card {
        box-shadow: none;
        width: 100%;
        border-radius: 0;
        padding: 0;
        margin: 0;
    }
}

/* Responsive */
@media (max-width: 1024px) {
    .app-container {
        flex-direction: column;
    }
    
    .form-section {
        width: 100%;
        height: auto;
        position: static;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    
    .preview-section {
        padding: 1rem;
        overflow-x: auto;
    }
    
    .payslip-card, .preview-actions {
        width: 210mm;
        transform: scale(0.9);
        transform-origin: top center;
    }
}

@media (max-width: 768px) {
     .payslip-card, .preview-actions {
        transform: scale(0.7);
    }
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}