/* NBR Invoice Generator - Matching Main Site Aesthetics */
:root {
    --primary-black: #000000;
    --primary-dark: #0a0a0a;
    --secondary-dark: #1a1a1a;
    --accent-white: #ffffff;
    --accent-gray: #888888;
    --light-gray: #cccccc;
    --border-gray: #333333;
    --gradient-start: #000000;
    --gradient-end: #1a1a1a;
}

/* Password Screen Styles */
.password-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-black);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.password-screen.success {
    animation: fadeOut 0.5s ease forwards;
}

.password-container {
    background: var(--secondary-dark);
    border: 1px solid var(--border-gray);
    padding: 60px;
    max-width: 500px;
    width: 90%;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.password-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.02) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.password-logo {
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
}

.password-logo h1 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 3rem;
    color: var(--accent-white);
    letter-spacing: 0.05em;
    margin: 0;
}

.password-logo .highlight {
    background: linear-gradient(to right, #ffffff 0%, #cccccc 50%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease-in-out infinite;
}

.password-container h2 {
    color: var(--accent-white);
    font-size: 1.5rem;
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: -0.5px;
    position: relative;
    z-index: 1;
}

.password-container p {
    color: var(--accent-gray);
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
}

.password-input-group {
    display: flex;
    gap: 0;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

#password-input {
    flex: 1;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-gray);
    border-right: none;
    color: var(--accent-white);
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
}

#password-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-white);
}

#password-input::placeholder {
    color: var(--accent-gray);
    opacity: 0.7;
}

#password-submit {
    padding: 15px 25px;
    background: var(--accent-white);
    color: var(--primary-black);
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

#password-submit:hover:not(:disabled) {
    background: var(--light-gray);
}

#password-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.password-error {
    color: #ef4444;
    font-size: 0.9rem;
    margin-bottom: 20px;
    min-height: 20px;
    position: relative;
    z-index: 1;
}

.password-hint {
    color: var(--accent-gray);
    font-size: 0.85rem;
    opacity: 0.7;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    z-index: 1;
}

.password-hint i {
    font-size: 0.9rem;
}

/* Shake animation for invalid password */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.5s ease;
}

/* Fade animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* Hide main content by default until authenticated */
body.auth-required .navbar,
body.auth-required .invoice-hero,
body.auth-required .invoice-generator-section,
body.auth-required .cta-section,
body.auth-required footer {
    display: none;
}

/* Invoice Hero Section */
.invoice-hero {
    position: relative;
    padding-top: 180px;
    padding-bottom: 80px;
    background: var(--primary-black);
    text-align: center;
    border-bottom: 1px solid var(--border-gray);
    background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.03) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255,255,255,0.03) 0%, transparent 50%),
                var(--primary-black);
}
.invoice-hero {
    position: relative;
    padding-top: 80px;
    padding-bottom: 25px;
    background: var(--primary-black);
    text-align: center;
    border-bottom: 1px solid var(--border-gray);
    background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.03) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255,255,255,0.03) 0%, transparent 50%),
                var(--primary-black);
}

.invoice-hero h1 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(3rem, 8vw, 5rem);
    color: var(--accent-white);
    letter-spacing: 0.05em;
    margin-bottom: 20px;
    background: linear-gradient(to right, #ffffff 0%, #cccccc 50%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% { background-position: -100% 0; }
    100% { background-position: 100% 0; }
}

.invoice-hero p {
    color: var(--accent-gray);
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto;
    font-weight: 300;
    letter-spacing: 1px;
}

/* Invoice Generator Section */
.invoice-generator-section {
    padding: 100px 0;
    background-color: var(--primary-dark);
    position: relative;
}

.invoice-generator-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-gray), transparent);
}

.logo {
    font-size: 2.5rem;
    font-weight: 900;
    letter-spacing: 4px;
    text-transform: lowercase;
}

.logo sup {
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0;
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-gray);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.section-header h2 {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 20px;
    font-weight: 800;
    color: var(--accent-white);
    letter-spacing: -1px;
}

.section-header .subtitle {
    text-align: center;
    color: var(--accent-gray);
    font-size: 1.1rem;
    margin-bottom: 20px;
    opacity: 0.8;
}

/* Updated container for fullscreen form */
.invoice-container {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
}

.invoice-form-container {
    width: 100%;
}

/* Invoice Form Styles */
.invoice-form {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0;
    overflow: hidden;
}

.form-section {
    width: 100%;
    padding: 40px;
    border-bottom: 1px solid var(--border-gray);
    transition: all 0.3s ease;
    position: relative;
}

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

.form-section:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

.form-section h3 {
    margin-bottom: 30px;
    color: var(--accent-white);
    position: relative;
    padding-bottom: 15px;
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: -0.5px;
}

.form-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, var(--accent-white), transparent);
}

.form-section h3 i {
    margin-right: 15px;
    color: var(--accent-gray);
    font-size: 1.2rem;
    opacity: 0.7;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--accent-white);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-gray);
    color: var(--accent-white);
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
    border-radius: 0;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-white);
    background-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.form-group input[disabled],
.form-group textarea[disabled],
.form-group select[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: rgba(255, 255, 255, 0.02);
}

.form-group select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}


/* Business Details Section Enhancement */
.form-section:first-of-type {
    background-color: rgba(255, 255, 255, 0.05);
    border-left: 2px solid var(--accent-white);
}

.form-section:first-of-type::before {
    content: 'NBR (UK) SERVICES LTD';
    position: absolute;
    top: 15px;
    right: 40px;
    font-size: 0.75rem;
    color: var(--accent-gray);
    font-style: normal;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.5;
}

    .form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.form-row .form-group {
    flex: 1;
}

.form-buttons {
    padding: 40px;
    background-color: var(--secondary-dark);
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* Form Validation Styles */
input.invalid, textarea.invalid, select.invalid {
    border-color: #ef4444;
    background-color: rgba(239, 68, 68, 0.1);
}

input.invalid:focus, textarea.invalid:focus, select.invalid:focus {
    border-color: #ef4444;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}
    
/* Invoice Items */
.items-container {
    margin-bottom: 20px;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border-gray);
    background-color: rgba(255, 255, 255, 0.02);
}

.item-row {
    display: flex;
    gap: 15px;
    padding: 20px;
    border-bottom: 1px solid var(--border-gray);
    align-items: flex-end;
    transition: background-color 0.3s ease;
}

.item-row:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

.item-row:last-child {
    border-bottom: none;
}

.item-row .form-group {
    flex: 1;
}

.item-row .form-group:nth-child(2),
.item-row .form-group:nth-child(3),
.item-row .form-group:nth-child(4) {
    flex: 0 0 120px;
}

.item-actions {
    display: flex;
    align-items: flex-end;
    padding-bottom: 15px;
}

.remove-item {
    background: none;
    border: none;
    color: var(--accent-gray);
    cursor: pointer;
    padding: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    opacity: 0.5;
}

.remove-item:hover {
    opacity: 1;
    color: #ef4444;
    transform: scale(1.1);
}

.remove-item:disabled {
    opacity: 0.2;
    cursor: not-allowed;
}

.add-item-button,
.secondary-button {
    padding: 12px 30px;
    margin-top: 10px;
    background: transparent;
    color: var(--accent-white);
    border: 1px solid var(--accent-white);
    cursor: pointer;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.add-item-button:hover,
.secondary-button:hover {
    background: var(--accent-white);
    color: var(--primary-black);
}

.add-item-button i {
    margin-right: 8px;
}

.preview-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--accent-white);
    color: var(--primary-black);
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
}

.preview-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--secondary-dark);
    transition: left 0.3s ease;
    z-index: -1;
}

.preview-button:hover {
    color: var(--accent-gray);
}

.preview-button:hover::before {
    left: 0;
}

.primary-button {
    padding: 10px 20px;
    background: var(--accent-white);
    color: var(--primary-black);
    border: none;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 0.9rem;
}

.primary-button:hover {
    background: var(--accent-gray);
}

/* Modal Preview Styles */
.invoice-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.invoice-modal {
    width: 90%;
    max-width: 1000px;
    max-height: 90vh;
    background-color: var(--secondary-dark);
    border: 1px solid var(--border-gray);
    overflow: hidden;
    position: relative;
    transform: scale(0.95);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.invoice-modal-overlay.active .invoice-modal {
    transform: scale(1);
    opacity: 1;
}

.invoice-modal-header {
    padding: 20px 30px;
    background-color: var(--primary-black);
    color: var(--accent-white);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-gray);
}

.invoice-modal-header h3 {
    color: var(--accent-white);
    margin-bottom: 0;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.invoice-modal-controls {
    display: flex;
    gap: 15px;
}

.close-modal {
    background: none;
    border: none;
    color: var(--accent-white);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
}

.close-modal:hover {
    opacity: 1;
    transform: rotate(90deg);
}

.invoice-modal-content {
    padding: 40px;
    max-height: calc(90vh - 80px);
    overflow-y: auto;
    background-color: white;
}

/* Loading Spinner */
.fa-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* CTA Section - Matching Main Site */
.cta-section {
    padding: 120px 0;
    background-color: var(--primary-black);
    text-align: center;
    position: relative;
    border-top: 1px solid var(--border-gray);
}

.cta-content h2 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--accent-white);
    font-weight: 800;
    letter-spacing: -1px;
}

.cta-content p {
    font-size: 1.2rem;
    color: var(--accent-gray);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer - Matching Main Site */
footer {
    background-color: var(--primary-black);
    color: var(--accent-white);
    padding: 80px 0 30px;
    border-top: 1px solid var(--border-gray);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-col {
    flex: 1;
    min-width: 250px;
}

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: var(--accent-gray);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

.footer-col ul li a:hover {
    color: var(--accent-white);
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-logo .logo-text {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-white);
}

.footer-logo .highlight {
    background: linear-gradient(to right, #ffffff 0%, #cccccc 50%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-gray);
    color: var(--accent-gray);
    font-size: 0.9rem;
}

/* Invoice Template Styles (for the preview) */
.invoice-document {
    font-family: 'Inter', sans-serif;
    color: #333;
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    box-sizing: border-box;
    padding: 20px;
    background: white;
}

/* Print optimized styles */
@media print {
    .invoice-document {
        padding: 0;
        max-width: 100%;
        width: 100%;
    }
    
    .invoice-document * {
        font-size: 10pt !important;
        line-height: 1.3 !important;
    }
    
    .invoice-logo {
        font-size: 14pt !important;
    }
    
    .invoice-title h2 {
        font-size: 16pt !important;
    }
}
    
/* A4 specific class for PDF generation */
.invoice-document-a4 {
    width: 210mm;
    height: 297mm;
    padding: 10mm;
    box-sizing: border-box;
    font-size: 10pt;
    line-height: 1.3;
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.invoice-logo {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem;
    font-weight: 400;
    color: #000;
    letter-spacing: 0.05em;
}

.invoice-logo .highlight {
    color: #000;
}

.invoice-title {
    text-align: right;
}

.invoice-title h2 {
    font-size: 2.2rem;
    color: #000;
    margin-bottom: 10px;
    font-weight: 800;
    letter-spacing: -1px;
}

.invoice-meta {
    margin-top: 10px;
    text-align: right;
}

.invoice-meta-item {
    margin-bottom: 5px;
}

.invoice-meta-item span {
    font-weight: 600;
}

.invoice-parties {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.invoice-from, .invoice-to {
    flex: 1;
}

.invoice-from h3, .invoice-to h3 {
    font-size: 1.2rem;
    color: #000;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e5e5e5;
    font-weight: 700;
}

.invoice-address {
    white-space: pre-line;
    line-height: 1.6;
}

.invoice-contact {
    margin-top: 15px;
}

.invoice-contact p {
    margin-bottom: 5px;
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 40px;
    font-size: 0.9rem;
}

.invoice-table th {
    background-color: #f8f8f8;
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: #000;
    border-bottom: 2px solid #000;
}

.invoice-table td {
    padding: 15px;
    border-bottom: 1px solid #e5e5e5;
}

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

.invoice-table .item-amount {
    text-align: right;
}

.invoice-totals {
    width: 350px;
    margin-left: auto;
}

.invoice-totals-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--medium-gray);
}

.invoice-totals-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #e5e5e5;
}

.invoice-totals-row:last-child {
    border-bottom: none;
    font-weight: 700;
    color: #000;
    padding-top: 15px;
    border-top: 2px solid #000;
}

.invoice-totals-row.grand-total {
    font-size: 1.2rem;
    color: #000;
}

.invoice-payment {
    margin-top: 40px;
    border-top: 1px solid var(--medium-gray);
    padding-top: 30px;
}

.invoice-payment h3 {
    font-size: 1.2rem;
    color: #000;
    margin-bottom: 15px;
    font-weight: 700;
}

.payment-details {
    background-color: #f8f8f8;
    padding: 20px;
    border: 1px solid #e5e5e5;
}

.payment-details p {
    margin-bottom: 10px;
}

.payment-details p span {
    font-weight: 600;
}

.invoice-notes {
    margin-top: 40px;
}

.invoice-notes h3 {
    font-size: 1.2rem;
    color: #000;
    margin-bottom: 15px;
    font-weight: 700;
}

.invoice-notes p {
    white-space: pre-line;
    line-height: 1.6;
}

.invoice-terms {
    margin-top: 30px;
    font-size: 0.9rem;
    color: #666;
}

.invoice-terms h4 {
    font-size: 1rem;
    margin-bottom: 10px;
}

.invoice-footer {
    margin-top: 40px;
    text-align: center;
    color: #666;
    font-size: 0.9rem;
    font-style: italic;
}

/* Header Styles - Matching Main Site */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    z-index: 100;
    transition: all 0.3s ease;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo a {
    text-decoration: none;
}

.logo-text {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-white);
    letter-spacing: -1px;
}

.logo-text .highlight {
    background: linear-gradient(to right, #ffffff 0%, #cccccc 50%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Mobile Menu */
.mobile-menu-icon {
    display: none;
    color: var(--accent-white);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-icon {
        display: block;
    }
}

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

/* Animations */
.animate-fadeInUp {
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Media Queries */
@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
        gap: 10px;
    }
    
    .item-row {
        flex-wrap: wrap;
    }
    
    .item-row .form-group:nth-child(2),
    .item-row .form-group:nth-child(3),
    .item-row .form-group:nth-child(4) {
        flex: 1 0 calc(33.33% - 10px);
    }
    
    .item-actions {
        width: 100%;
        justify-content: flex-end;
        padding: 10px 0 0;
    }
    
    .invoice-modal-header {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
    }
    
    .invoice-modal-content {
        padding: 20px;
    }
    
    .invoice-header,
    .invoice-parties {
        flex-direction: column;
        gap: 30px;
    }
    
    .invoice-title {
        text-align: left;
    }
    
    .invoice-meta {
        text-align: left;
    }
}

@media (max-width: 576px) {
    .invoice-modal {
        width: 95%;
        max-height: 95vh;
    }
    
    .invoice-modal-content {
        padding: 15px;
    }
    
    .item-row {
        padding: 15px 10px;
    }
    
    .item-row .form-group:nth-child(2),
    .item-row .form-group:nth-child(3),
    .item-row .form-group:nth-child(4) {
        flex: 1 0 100%;
    }
    
    .invoice-totals {
        width: 100%;
    }
    
    .form-section {
        padding: 20px;
    }
    
    .form-section:first-of-type {
        padding: 25px;
    }
}