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

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

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

.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.main-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border: 1px solid rgba(255,255,255,0.2);
}

.tabs {
    display: flex;
    margin-bottom: 30px;
    background: #f8f9fa;
    border-radius: 12px;
    padding: 4px;
}

.tab {
    flex: 1;
    padding: 12px 24px;
    text-align: center;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    color: #6c757d;
}

.tab.active {
    background: #667eea;
    color: white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #374151;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.file-drop-zone {
    border: 3px dashed #d1d5db;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f9fafb;
    position: relative;
}

.file-drop-zone:hover {
    border-color: #667eea;
    background: #f0f7ff;
}

.file-drop-zone.dragover {
    border-color: #667eea;
    background: #e0f2fe;
    transform: scale(1.02);
}

.file-drop-zone input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.drop-zone-content {
    pointer-events: none;
}

.drop-zone-icon {
    font-size: 3rem;
    color: #9ca3af;
    margin-bottom: 16px;
}

.crypto-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

.crypto-card {
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.crypto-card:hover {
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
}

.crypto-card.selected {
    border-color: #667eea;
    background: #f0f7ff;
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
}

.crypto-card h3 {
    color: #374151;
    margin-bottom: 8px;
}

.crypto-card p {
    color: #6b7280;
    font-size: 0.9rem;
}

.btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.3);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn.processing {
    background: #6b7280;
}

.progress-container {
    margin-top: 20px;
    display: none;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-text {
    text-align: center;
    color: #6b7280;
    font-size: 0.9rem;
}

.file-list {
    margin-top: 20px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: #f8f9fa;
    border-radius: 8px;
    margin-bottom: 8px;
    border-left: 4px solid #667eea;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 500;
    color: #374151;
}

.file-size {
    font-size: 0.85rem;
    color: #6b7280;
}

.file-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.status-pending {
    background: #fef3c7;
    color: #92400e;
}

.status-processing {
    background: #dbeafe;
    color: #1e40af;
}

.status-complete {
    background: #d1fae5;
    color: #065f46;
}

.status-error {
    background: #fee2e2;
    color: #991b1b;
}

.download-section {
    margin-top: 30px;
    padding: 20px;
    background: #f0f7ff;
    border-radius: 12px;
    border: 1px solid #e0f2fe;
}

.download-btn {
    background: #10b981;
    margin-right: 10px;
    margin-bottom: 10px;
}

.download-btn:hover {
    background: #059669;
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

.streaming-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: #e0f2fe;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #0369a1;
    margin-top: 10px;
}

.streaming-dot {
    width: 8px;
    height: 8px;
    background: #0369a1;
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@media (max-width: 768px) {
    .crypto-options {
        grid-template-columns: 1fr;
    }
    
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .main-card {
        padding: 20px;
    }
}