.utm-builder-wrap {
	max-width: 720px;
	margin: 20px auto;
	padding: 28px;
	background: #ffffff;
	border: 1px solid #e2e5e9;
	border-radius: 10px;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.utm-builder-title {
	margin: 0 0 6px;
	font-size: 24px;
	font-weight: 700;
	color: #1a1a1a;
}

.utm-builder-desc {
	margin: 0 0 22px;
	color: #5c6470;
	font-size: 14px;
	line-height: 1.5;
}

.utm-builder-form {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 16px;
	margin-bottom: 24px;
}

.utm-field {
	display: flex;
	flex-direction: column;
}

.utm-field:first-child {
	grid-column: 1 / -1;
}

.utm-field label {
	font-size: 13px;
	font-weight: 600;
	color: #303844;
	margin-bottom: 6px;
}

.utm-req {
	color: #e63946;
}

.utm-key {
	color: #8a94a3;
	font-weight: 400;
	font-size: 12px;
}

.utm-field input[type="text"] {
	padding: 10px 12px;
	border: 1px solid #d6dae0;
	border-radius: 6px;
	font-size: 14px;
	outline: none;
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
	width: 100%;
	box-sizing: border-box;
}

.utm-field input[type="text"]:focus {
	border-color: #4a7dff;
	box-shadow: 0 0 0 3px rgba(74, 125, 255, 0.12);
}

.utm-field input.utm-invalid {
	border-color: #e63946;
}

.utm-result-box {
	background: #f6f8fb;
	border: 1px solid #e2e5e9;
	border-radius: 8px;
	padding: 16px;
	margin-bottom: 16px;
}

.utm-result-box label {
	display: block;
	font-size: 13px;
	font-weight: 600;
	color: #303844;
	margin-bottom: 8px;
}

.utm-result-row {
	display: flex;
	gap: 10px;
}

#utm_generated_url {
	flex: 1;
	padding: 10px 12px;
	border: 1px solid #d6dae0;
	border-radius: 6px;
	font-size: 13px;
	background: #ffffff;
	color: #1a1a1a;
	word-break: break-all;
}

.utm-copy-btn,
.utm-reset-btn {
	cursor: pointer;
	border: none;
	border-radius: 6px;
	padding: 10px 18px;
	font-size: 14px;
	font-weight: 600;
	transition: opacity 0.15s ease;
	white-space: nowrap;
}

.utm-copy-btn {
	background: #4a7dff;
	color: #ffffff;
}

.utm-copy-btn:hover,
.utm-reset-btn:hover {
	opacity: 0.9;
}

.utm-reset-btn {
	background: #eceff3;
	color: #303844;
}

.utm-copy-msg {
	margin: 8px 0 0;
	font-size: 13px;
	color: #2a9d5c;
	min-height: 18px;
}

.utm-actions {
	text-align: right;
}

@media (max-width: 600px) {
	.utm-builder-form {
		grid-template-columns: 1fr;
	}
	.utm-result-row {
		flex-direction: column;
	}
	.utm-actions {
		text-align: left;
	}
}