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

:root {
    /* Apete brand colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --accent: #f59e0b;
    --dark: #1e293b;
    --darker: #0f172a;
    --light: #f8fafc;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --success: #22c55e;
    --error: #ef4444;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--darker) 0%, var(--dark) 50%, #1e3a5f 100%);
    min-height: 100vh;
    color: var(--light);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    padding: 30px 20px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
}

.logo-icon.small {
    width: 30px;
    height: 30px;
    font-size: 1rem;
    border-radius: 6px;
}

.logo-text {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--gray-light);
    margin-bottom: 5px;
}

.company {
    font-size: 0.9rem;
    color: var(--gray);
}

/* Progress Steps */
.progress-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px 10px;
    gap: 0;
    flex-wrap: wrap;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: default;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid var(--gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: all 0.3s ease;
}

.step-label {
    font-size: 0.85rem;
    color: var(--gray);
    transition: all 0.3s ease;
}

.step.active .step-number {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
}

.step.active .step-label {
    color: var(--light);
    font-weight: 600;
}

.step.completed .step-number {
    background: var(--secondary);
    border-color: var(--secondary);
}

.step.completed .step-number::after {
    content: '✓';
}

.step.completed .step-label {
    color: var(--secondary);
}

.step-line {
    width: 40px;
    height: 2px;
    background: var(--gray);
    margin: 0 5px;
    margin-bottom: 25px;
}

/* Step Content */
.step-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.step-title {
    text-align: center;
    color: var(--primary-light);
    margin-bottom: 25px;
    font-size: 1.5rem;
}

/* Info Section (Step 0) */
.info-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.info-box {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.info-box h3 {
    color: var(--primary-light);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.info-box p {
    color: var(--gray-light);
    line-height: 1.7;
    margin-bottom: 10px;
}

.info-box p:last-child {
    margin-bottom: 0;
}

.info-box a {
    color: var(--primary-light);
    text-decoration: none;
}

.info-box a:hover {
    text-decoration: underline;
}

.info-box.warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
}

.info-box.warning h3 {
    color: #fbbf24;
}

.info-box.privacy {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
}

.info-box.privacy h3 {
    color: var(--secondary);
}

.info-box.ideas {
    background: rgba(37, 99, 235, 0.1);
    border-color: rgba(37, 99, 235, 0.3);
}

.info-box.ideas h3 {
    color: var(--primary-light);
}

.info-list {
    list-style: none;
    padding: 0;
    margin: 15px 0;
}

.info-list li {
    color: var(--gray-light);
    padding: 8px 0 8px 25px;
    position: relative;
    line-height: 1.5;
}

.info-list li::before {
    content: "•";
    color: var(--primary-light);
    font-weight: bold;
    position: absolute;
    left: 8px;
}

.info-note {
    font-size: 0.9rem;
    color: var(--gray) !important;
    margin-top: 15px !important;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Diacritics Checkbox Option */
.diacritics-option {
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: 10px;
    padding: 15px 20px;
}

.checkbox-container {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    user-select: none;
}

.checkbox-container input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border: 2px solid var(--primary);
    border-radius: 6px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.checkbox-container input[type="checkbox"]:checked + .checkmark {
    background: var(--primary);
}

.checkbox-container input[type="checkbox"]:checked + .checkmark::after {
    content: "✓";
    color: white;
    font-weight: bold;
    font-size: 14px;
}

.checkbox-label {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.checkbox-label strong {
    color: var(--light);
    font-size: 1rem;
}

.checkbox-hint {
    color: var(--gray-light);
    font-size: 0.85rem;
}

/* Upload Section */
.upload-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 40px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.upload-area {
    border: 3px dashed rgba(37, 99, 235, 0.5);
    border-radius: 15px;
    padding: 60px 40px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.upload-area p {
    color: var(--gray-light);
    margin: 10px 0;
}

.upload-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 15px;
}

.upload-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.4);
}

.file-name {
    text-align: center;
    margin-top: 20px;
    color: var(--primary-light);
    font-weight: 500;
}

/* Invoice Details */
.invoice-details {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.detail-item {
    background: rgba(0, 0, 0, 0.2);
    padding: 15px;
    border-radius: 10px;
}

.detail-item.full-width {
    grid-column: span 2;
}

.warning-box {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.4);
    border-radius: 8px;
    padding: 12px 15px;
    color: #fbbf24;
    font-size: 0.9rem;
    line-height: 1.5;
}

.warning-box strong {
    color: #f59e0b;
}

.info-box-inline {
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: 8px;
    padding: 12px 15px;
    color: var(--gray-light);
    font-size: 0.9rem;
    line-height: 1.5;
}

.info-box-inline strong {
    color: var(--primary-light);
}

.detail-item.highlight {
    background: rgba(37, 99, 235, 0.2);
    border: 1px solid rgba(37, 99, 235, 0.3);
}

.detail-item .label {
    display: block;
    color: var(--gray-light);
    font-size: 0.85rem;
    margin-bottom: 5px;
}

.detail-item .value {
    color: var(--light);
    font-size: 1rem;
    font-weight: 500;
    word-break: break-all;
}

.detail-item .value.amount {
    color: var(--secondary);
    font-size: 1.3rem;
    font-weight: 700;
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--light);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-download {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
    color: white;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

.btn-copy {
    background: linear-gradient(135deg, var(--accent), #d97706);
    color: white;
}

.btn-copy:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245, 158, 11, 0.4);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.1rem;
}

.step-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 25px;
    gap: 15px;
}

/* QR Section */
.qr-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.qr-instruction {
    color: var(--gray-light);
    margin-bottom: 20px;
}

.qr-container {
    background: white;
    display: inline-block;
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 15px;
}

.qr-container img {
    display: block;
}

.qr-amount {
    font-size: 1.2rem;
    color: var(--light);
    margin-bottom: 20px;
}

.qr-amount strong {
    color: var(--secondary);
    font-size: 1.5rem;
}

/* HUB3 Data */
.hub3-data {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 15px 20px;
    margin-top: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hub3-data summary {
    cursor: pointer;
    color: var(--gray-light);
    font-size: 0.9rem;
}

.hub3-data pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    overflow-x: auto;
    font-family: 'Consolas', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--gray-light);
    white-space: pre-wrap;
}

/* Rename Section */
.rename-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.rename-info {
    margin: 15px 0;
}

.rename-info p {
    color: var(--gray-light);
    margin-bottom: 10px;
}

.filename-box {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px 20px;
    border-radius: 10px;
    font-family: 'Consolas', monospace;
    color: var(--light);
    word-break: break-all;
}

.filename-box.highlight {
    background: rgba(16, 185, 129, 0.2);
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: var(--secondary);
}

.rename-arrow {
    font-size: 2rem;
    color: var(--primary-light);
    margin: 10px 0;
}

.rename-note {
    color: var(--gray);
    font-size: 0.9rem;
    margin: 20px 0;
    padding: 15px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 10px;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Finish Section */
.finish-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 50px 30px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.success-icon {
    font-size: 5rem;
    margin-bottom: 20px;
}

.finish-section h3 {
    font-size: 1.8rem;
    color: var(--secondary);
    margin-bottom: 10px;
}

.finish-section > p {
    color: var(--gray-light);
    margin-bottom: 30px;
}

.finish-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* Footer */
footer {
    margin-top: 50px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px 20px 0 0;
    padding: 40px 30px 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-disclaimer {
    grid-column: span 2;
}

.footer-disclaimer h4 {
    color: var(--accent);
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.footer-disclaimer p {
    color: var(--gray);
    font-size: 0.85rem;
    line-height: 1.6;
}

.footer-disclaimer .made-with {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--gray-light);
    font-style: italic;
}

.footer-company {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--light);
}

.footer-logo-img {
    height: 50px;
    width: auto;
    background: white;
    padding: 8px 15px;
    border-radius: 8px;
}

.footer-company > p {
    color: var(--gray);
    font-size: 0.85rem;
}

.footer-contact h4,
.footer-legal h4 {
    color: var(--primary-light);
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.footer-contact p,
.footer-legal p {
    color: var(--gray);
    font-size: 0.85rem;
    margin-bottom: 5px;
}

.footer-contact a {
    color: var(--primary-light);
    text-decoration: none;
}

.footer-contact a:hover {
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.footer-bottom p {
    color: var(--gray);
    font-size: 0.85rem;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-light);
}

.version {
    background: linear-gradient(135deg, var(--accent), #d97706);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Responsive */
@media (max-width: 768px) {
    .details-grid {
        grid-template-columns: 1fr;
    }
    
    .detail-item.full-width {
        grid-column: span 1;
    }
    
    .logo-text {
        font-size: 2rem;
    }
    
    .logo-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .upload-area {
        padding: 40px 20px;
    }
    
    .step-actions {
        flex-direction: column;
    }
    
    .finish-actions {
        flex-direction: column;
    }
    
    .footer-disclaimer {
        grid-column: span 1;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .progress-steps {
        gap: 5px;
    }
    
    .step-line {
        width: 20px;
    }
    
    .step-label {
        font-size: 0.7rem;
    }
}