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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #f8f9fa;
    min-height: 100vh;
    color: #333;
}

body, input, button, textarea, select {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

/* Monospace font for ETA numbers to prevent text jumping */
.eta-number {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-variant-numeric: tabular-nums;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    color: #333;
}

header h1 {
    font-size: 3rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

header h1 a {
    color: #333;
    text-decoration: none;
    transition: color 0.2s ease;
}

header h1 a:hover {
    color: #666;
    cursor: pointer;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 300;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.card h2 {
    margin-bottom: 1.5rem;
    color: #2d3748;
    font-weight: 600;
}

.drop-zone {
    border: 2px dashed #cbd5e0;
    border-radius: 8px;
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.2s ease;
    cursor: pointer;
    position: relative;
}

.drop-zone:hover {
    border-color: #333;
    background-color: #f7fafc;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.drop-zone.dragover {
    border-color: #333;
    background-color: #f0f0f0;
    transform: scale(1.02);
}

.drop-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 8px;
    background: linear-gradient(45deg, transparent, rgba(51, 51, 51, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.drop-zone:hover::before {
    opacity: 1;
}

.drop-zone-content {
    color: #718096;
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.7;
    transition: all 0.2s ease;
    font-weight: 300;
}

.drop-zone:hover .upload-icon {
    opacity: 1;
    transform: scale(1.1);
}

.drop-zone-content p {
    margin-bottom: 0.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background-color: #333;
    color: white;
}

.btn-primary:hover {
    background-color: #555;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: #e2e8f0;
    color: #4a5568;
}

.btn-secondary:hover {
    background-color: #cbd5e0;
}

.file-info {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #e2e8f0;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.file-info h3 {
    margin-bottom: 1rem;
    color: #2d3748;
}

.file-details {
    background-color: #f7fafc;
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
}

.file-details p {
    margin-bottom: 0.5rem;
}

/* Make filenames wrap properly */
.file-details span {
    word-wrap: break-word;
    word-break: break-all;
    overflow-wrap: break-word;
    hyphens: auto;
    max-width: 100%;
    display: inline-block;
}

/* Ensure file name specifically wraps well */
#file-name {
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    display: inline-block;
    line-height: 1.4;
}

/* For >1 file */
#file-list {
    margin-bottom: 1rem;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    background-color: white;
    border-radius: 4px;
    border: 1px solid #e2e8f0;
    min-height: 60px;
}

.file-item .file-info {
    flex: 1;
    margin: 0;
    padding: 0;
    border: none;
    min-width: 0; /* Allows flex item to shrink below content size */
    overflow: hidden; /* Prevents overflow */
}

.file-item .file-name {
    font-weight: 500;
    color: #2d3748;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    hyphens: auto;
    max-width: 100%;
    line-height: 1.3;
    margin-bottom: 0.25rem;
    display: block;
}

.file-item .file-size {
    font-size: 0.9rem;
    color: #718096;
    margin-top: 0;
    display: block;
    line-height: 1.2;
}

.file-remove {
    color: #666;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    margin-left: 0.5rem;
    transition: color 0.2s ease;
    user-select: none;
    line-height: 1;
    flex-shrink: 0; /* Prevents the X from shrinking */
    padding-top: 0.1rem; /* Aligns with the top of the filename */
}

.file-remove:hover {
    color: #333;
}

.total-info {
    padding-top: 1rem;
    border-top: 1px solid #e2e8f0;
}

.file-progress, .overall-progress {
    margin-bottom: 1.5rem;
}

.file-progress p, .overall-progress p {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

#overall-progress-fill {
    background-color: #4a5568;
}

#receiver-overall-progress-fill {
    background-color: #4a5568;
}

.share-link {
    margin-bottom: 1.5rem;
}

.link-container {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.link-container input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 0.9rem;
    background-color: #f7fafc;
}

.status {
    background-color: #f8f9fa;
    color: #333;
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    border: 1px solid #e2e8f0;
}

.progress-container {
    margin-top: 1rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background-color: #333;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-container p {
    text-align: center;
    font-weight: 500;
    color: #4a5568;
}

/* FAQ Styles */
.faq-container {
    margin-top: 1rem;
}

.faq-item {
    border-bottom: 1px solid #e2e8f0;
    margin-bottom: 0.5rem;
}

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

.faq-item summary {
    cursor: pointer;
    padding: 1rem 0;
    font-weight: 600;
    color: #2d3748;
    transition: color 0.2s ease;
}

.faq-item summary:hover {
    color: #333;
}

.faq-item p {
    padding: 0 0 1rem 0;
    color: #4a5568;
    line-height: 1.6;
}

.faq-item a {
    color: #333;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

.faq-item a:hover {
    text-decoration-thickness: 2px;
}

.faq-item code {
    background-color: #f1f5f9;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9em;
    color: #334155;
}

.footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    border-top: 1px solid #e2e8f0;
    color: #718096;
    font-size: 0.9rem;
}

.footer p {
    margin: 0;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    header h1 {
        font-size: 2.5rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .drop-zone {
        padding: 2rem 1rem;
    }
    
    .link-container {
        flex-direction: column;
    }
}