.page-header {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 40px;
    text-align: center;
    border: 1px solid #dbeafe;
}


.page-header p {
    color: #475569;
    font-size: 1.1rem;
    margin: 0;
}

.main-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.input-panel {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
}

.input-panel h3 {
    color: #1e293b;
    font-weight: 600;
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.url-textarea {
    width: 100%;
    min-height: 200px;
    padding: 20px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    line-height: 1.6;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    resize: vertical;
    transition: all 0.2s ease;
}

.url-textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.url-textarea::placeholder {
    color: #9ca3af;
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    flex-wrap: wrap;
    gap: 16px;
}

.note-text {
    color: #6b7280;
    font-size: 0.9rem;
    font-style: italic;
}

.submit-btn {
    background: #2563eb;
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.submit-btn:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.error-message {
    background: #fef2f2;
    color: #dc2626;
    padding: 16px 20px;
    border-radius: 8px;
    border: 1px solid #fecaca;
    margin-bottom: 24px;
    font-size: 0.9rem;
}

.info-panel {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
    height: fit-content;
}

.info-panel h5 {
    color: #1e293b;
    font-weight: 600;
    margin-bottom: 16px;
    font-size: 1.1rem;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 8px;
}

.info-panel p {
    color: #475569;
    margin-bottom: 12px;
    line-height: 1.6;
    font-size: 0.9rem;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    color: #475569;
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
    font-size: 0.9rem;
    line-height: 1.5;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}


.feature-list li.disabled::before {
    content: "x";
    position: absolute;
    left: 0;
    color: #b93510;
    font-weight: bold;
}

@media (max-width: 768px) {
    .page-header {
        padding: 30px 20px;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .main-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .input-panel,
    .info-panel {
        padding: 30px 20px;
    }

    .input-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .submit-btn {
        width: 100%;
    }

    .url-textarea {
        min-height: 150px;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 20px 15px;
    }

    .input-panel,
    .info-panel {
        padding: 20px 15px;
    }

    .url-textarea {
        padding: 15px;
        font-size: 0.9rem;
    }
}