.bct-calculator {
	max-width: 760px;
	margin: 24px auto;
	padding: 24px;
	border: 1px solid #d6d6d6;
	border-radius: 8px;
	box-shadow: 0 4px 18px rgba(0, 0, 0, 0.08);
	font-family: inherit;
}

.bct-calculator h3 {
	margin: 0 0 10px;
	font-size: 40px;
	font-weight: 700;
	text-align: center;
}

.bct-intro {
	margin: 0 0 18px;
	text-align: center;
	font-size: 15px;
	opacity: 0.9;
}

.bct-tabs {
	display: flex;
	gap: 24px;
	border-bottom: 1px solid #cbcbcb;
	margin-bottom: 16px;
}

.bct-tab {
	background: transparent;
	border: 1px solid var(--bct-accent, #1d74d8);
	border-bottom: 3px solid transparent;
	padding: 10px 8px;
	font-size: 20px;
	font-weight: 700;
	cursor: pointer;
	color: #ffffff;
	border-radius: 4px 4px 0 0;
}

.bct-form-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 14px 18px;
}

.bct-field {
	margin-bottom: 4px;
}

.bct-field label {
	display: block;
	margin-bottom: 8px;
	font-size: 18px;
	font-weight: 700;
}

.bct-slider-row {
	display: grid;
	grid-template-columns: 1fr auto;
	gap: 12px;
	align-items: center;
}

.bct-range {
	width: 100%;
	-webkit-appearance: none;
	appearance: none;
	height: 10px;
	border-radius: 999px;
	background: #2a313e;
	outline: none;
}

.bct-range::-webkit-slider-thumb {
	-webkit-appearance: none;
	appearance: none;
	width: 20px;
	height: 20px;
	border-radius: 50%;
	background: var(--bct-accent, #A503FF);
	border: 2px solid #ffffff;
	box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
	cursor: pointer;
}

.bct-range::-moz-range-thumb {
	width: 20px;
	height: 20px;
	border-radius: 50%;
	background: var(--bct-accent, #A503FF);
	border: 2px solid #ffffff;
	box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
	cursor: pointer;
}

.bct-range:disabled {
	opacity: 0.55;
	cursor: not-allowed;
}

.bct-slider-value {
	min-width: 92px;
	height: 44px;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 8px 10px;
	border-radius: 6px;
	background: #171c24;
	border: 1px solid #38404f;
	color: #ffffff;
	font-size: 18px;
	font-weight: 700;
}

.bct-input {
	width: 100%;
	height: 50px;
	padding: 10px 12px;
	font-size: 24px;
	border: 1px solid #38404f;
	border-radius: 4px;
	background: #171c24 !important;
	color: #ffffff !important;
	caret-color: #ffffff;
}

select.bct-input {
	font-size: 16px;
	background: #171c24 !important;
	color: #ffffff !important;
}

select.bct-input option {
	background: #171c24;
	color: #ffffff;
}

.bct-input::placeholder {
	color: rgba(255, 255, 255, 0.75);
	opacity: 1;
}

.bct-input:disabled {
	opacity: 0.6;
	cursor: not-allowed;
}

.bct-actions {
	display: flex;
	gap: 12px;
	margin: 18px 0 12px;
}

.bct-calculate-btn {
	flex: 1;
	padding: 12px 16px;
	border: 1px solid;
	border-radius: 6px;
	color: #fff;
	font-size: 20px;
	font-weight: 700;
	cursor: pointer;
	transition: transform 0.15s ease;
}

.bct-reset-btn {
	flex: 1;
	padding: 12px 16px;
	border: 1px solid var(--bct-accent, #1d74d8);
	border-radius: 6px;
	background: var(--bct-accent, #1d74d8);
	color: #fff;
	font-size: 20px;
	font-weight: 700;
	cursor: pointer;
}

.bct-results {
	margin-top: 20px;
	padding: 0;
	border: 0;
	background: transparent;
}

.bct-results h4 {
	margin: 0 0 14px;
	text-align: center;
	font-size: 24px;
	font-weight: 600;
}

.bct-result-card {
	margin-bottom: 10px;
	padding: 12px;
	background: #171c24;
	border-left: 4px solid var(--bct-accent, #1d74d8);
	border-radius: 4px;
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.bct-result-card p {
	margin: 0;
	display: flex;
	justify-content: space-between;
	align-items: center;
	font-size: 16px;
}

.bct-result-card span {
	font-weight: 700;
	font-size: 22px;
}

.bct-effort-track {
	width: 100%;
	height: 14px;
	margin-top: 10px;
	background: #d5dbe0;
	border-radius: 999px;
	overflow: hidden;
}

.bct-effort-fill {
	display: block;
	height: 100%;
	width: 0;
	background: linear-gradient(90deg, #35b66a, #e4bc40, #d13e4f);
	transition: width 0.2s ease;
}

.bct-help {
	margin: 12px 0 0;
	padding: 10px 12px;
	background: #171c24;
	border: 1px solid #38404f;
	border-radius: 4px;
	font-size: 14px;
}

@media (max-width: 640px) {
	.bct-calculator {
		padding: 16px;
		margin: 16px auto;
	}

	.bct-calculator h3 {
		font-size: 28px;
	}

	.bct-form-grid {
		grid-template-columns: 1fr;
	}

	.bct-tab {
		font-size: 16px;
	}

	.bct-input {
		font-size: 18px;
		height: 44px;
	}

	.bct-slider-value {
		font-size: 14px;
		height: 34px;
	}

	.bct-range {
		height: 8px;
	}

	.bct-actions {
		flex-direction: column;
	}

	.bct-calculate-btn,
	.bct-reset-btn {
		font-size: 16px;
	}

	.bct-result-card span {
		font-size: 18px;
	}
}