.tecz-utm-container {
    max-width: 900px;
    margin: 0 auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.tecz-utm-header {
    background: #f8fafc;
    padding: 20px;
    border-bottom: 1px solid #e2e8f0;
}

.tecz-utm-header h3 {
    margin: 0 0 5px 0;
    font-size: 1.25rem;
    color: #1e293b;
}

.tecz-utm-header p {
    margin: 0;
    font-size: 0.9rem;
    color: #64748b;
}

.tecz-utm-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.tecz-utm-inputs {
    padding: 20px;
    border-right: 1px solid #e2e8f0;
}

.tecz-form-group {
    margin-bottom: 15px;
}

.tecz-form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    font-size: 0.85rem;
    color: #334155;
}

.tecz-required {
    color: #ef4444;
}

.tecz-form-group input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 4px;
    font-size: 0.9rem;
    color: #0f172a;
    box-sizing: border-box;
}

.tecz-form-group input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.tecz-presets {
    margin-bottom: 15px;
}

.tecz-presets label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: #64748b;
    margin-bottom: 6px;
}

.tecz-preset-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tecz-preset-btn {
    background: #f1f5f9;
    border: 1px solid #cbd5e1;
    color: #334155;
    padding: 4px 8px;
    font-size: 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.tecz-preset-btn:hover {
    background: #e2e8f0;
    color: #0f172a;
}

.tecz-form-options {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #f1f5f9;
}

.tecz-checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.825rem;
    color: #475569;
    margin-bottom: 8px;
    cursor: pointer;
}

.tecz-checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.tecz-utm-output-panel {
    background: #1e293b;
    padding: 20px;
    display: flex;
    flex-direction: column;
    position: relative;
}

.tecz-output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.tecz-output-header span {
    color: #f1f5f9;
    font-weight: 600;
    font-size: 0.9rem;
}

.tecz-btn {
    background: #3b82f6;
    color: #ffffff;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.2s;
}

.tecz-btn:hover {
    background: #2563eb;
}

.tecz-btn-secondary {
    background: #475569;
}

.tecz-btn-secondary:hover {
    background: #334155;
}

#tecz-utm-output {
    flex-grow: 1;
    width: 100%;
    background: #0f172a;
    color: #38bdf8;
    border: 1px solid #334155;
    border-radius: 4px;
    padding: 15px;
    font-family: monospace;
    font-size: 0.85rem;
    resize: none;
    box-sizing: border-box;
    word-break: break-all;
    min-height: 200px;
}

#tecz-utm-output:focus {
    outline: none;
}

#tecz-utm-copy-msg {
    position: absolute;
    top: 60px;
    right: 25px;
    background: #10b981;
    color: #ffffff;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.tecz-utm-actions {
    margin-top: 15px;
    display: flex;
    justify-content: flex-end;
}

@media (max-width: 768px) {
    .tecz-utm-grid {
        grid-template-columns: 1fr;
    }
    .tecz-utm-inputs {
        border-right: none;
        border-bottom: 1px solid #e2e8f0;
    }
}