.kdv-calculator {
	--glass-bg: rgba(255, 255, 255, 0.15);
	--glass-border: rgba(255, 255, 255, 0.35);
	--glass-blur: blur(24px) saturate(180%);
	--glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
	--glass-radius: 24px;
	--accent: #007AFF;
	--accent-hover: #0051D5;
	--surface: rgba(255,255,255,0.08);
	--text-primary: #1C1C1E;
	--text-secondary: #6E6E73;
	--result-bg: rgba(255, 255, 255, 0.25);
	--danger: #FF3B30;
	--field-bg: rgba(255, 255, 255, 0.34);
	--field-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.45), inset 0 -1px 2px rgba(0, 0, 0, 0.04);
	color: var(--text-primary);
	font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	margin: 32px auto;
	max-width: 760px;
	position: relative;
}

.kdv-calculator *,
.kdv-calculator *::before,
.kdv-calculator *::after {
	box-sizing: border-box;
}

.kdv-calculator::before {
	background:
		radial-gradient(circle at 18% 12%, rgba(0, 122, 255, 0.22), transparent 34%),
		radial-gradient(circle at 84% 6%, rgba(94, 92, 230, 0.18), transparent 30%),
		radial-gradient(circle at 50% 100%, rgba(48, 209, 88, 0.12), transparent 36%);
	border-radius: calc(var(--glass-radius) + 18px);
	content: "";
	filter: blur(2px);
	inset: -18px;
	pointer-events: none;
	position: absolute;
	z-index: -1;
}

.kdv-card {
	background: var(--glass-bg);
	backdrop-filter: var(--glass-blur);
	-webkit-backdrop-filter: var(--glass-blur);
	border: 1px solid var(--glass-border);
	border-radius: var(--glass-radius);
	box-shadow: var(--glass-shadow);
	overflow: hidden;
	position: relative;
}

.kdv-card::after {
	background: linear-gradient(135deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0.04) 42%, rgba(255, 255, 255, 0.18));
	border-radius: inherit;
	content: "";
	inset: 0;
	pointer-events: none;
	position: absolute;
}

.kdv-input-card {
	padding: 28px;
}

.kdv-card__header {
	margin-bottom: 24px;
	position: relative;
	z-index: 1;
}

.kdv-card__title {
	color: var(--text-primary);
	font-size: clamp(26px, 4vw, 36px);
	font-weight: 700;
	letter-spacing: -0.03em;
	line-height: 1.08;
	margin: 0 0 8px;
}

.kdv-card__subtitle {
	color: var(--text-secondary);
	font-size: 15px;
	line-height: 1.5;
	margin: 0;
}

.kdv-form {
	display: grid;
	gap: 16px;
	position: relative;
	z-index: 1;
}

.kdv-fieldset {
	border: 0;
	margin: 0;
	min-inline-size: 0;
	padding: 0;
}

.kdv-fieldset legend,
.kdv-field label {
	color: var(--text-secondary);
	display: inline-flex;
	font-size: 14px;
	font-weight: 600;
	gap: 4px;
	margin: 0 0 10px;
}

.kdv-required {
	color: var(--danger);
	font-weight: 700;
}

.kdv-chip-group {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
}

.kdv-chip {
	align-items: center;
	background: rgba(255, 255, 255, 0.18);
	border: 1px solid rgba(255, 255, 255, 0.32);
	border-radius: 999px;
	color: var(--text-primary);
	cursor: pointer;
	display: inline-flex;
	font-size: 14px;
	font-weight: 600;
	justify-content: center;
	line-height: 1;
	min-height: 42px;
	padding: 0 16px;
	position: relative;
	transition: background 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
	user-select: none;
}

.kdv-mode-grid {
	display: grid;
	gap: 0;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	overflow: hidden;
}

.kdv-mode-chip {
	border-radius: 0;
	flex-direction: column;
	gap: 4px;
	min-height: 70px;
	padding: 12px 14px;
}

.kdv-mode-chip small {
	color: rgba(28, 28, 30, 0.75);
	font-size: 12px;
	font-weight: 500;
}

.kdv-mode-chip.is-selected small {
	color: rgba(255, 255, 255, 0.92);
}

.kdv-chip:hover {
	background: rgba(255, 255, 255, 0.3);
	transform: translateY(-1px);
}

.kdv-chip.is-selected {
	background: var(--accent);
	border-color: rgba(0, 122, 255, 0.72);
	box-shadow: 0 10px 22px rgba(0, 122, 255, 0.24);
	color: #fff;
}

.kdv-chip input {
	clip: rect(0 0 0 0);
	height: 1px;
	margin: -1px;
	overflow: hidden;
	position: absolute;
	white-space: nowrap;
	width: 1px;
}

.kdv-field {
	display: grid;
	position: relative;
}

.kdv-input {
	appearance: none;
	background: var(--field-bg);
	border: 1px solid rgba(255, 255, 255, 0.42);
	border-radius: 14px;
	box-shadow: var(--field-shadow);
	color: var(--text-primary);
	font: 600 18px/1.2 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	min-height: 54px;
	outline: none;
	padding: 0 16px;
	transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
	width: 100%;
}

.kdv-input::placeholder {
	color: rgba(110, 110, 115, 0.7);
}

.kdv-input:focus {
	background: rgba(255, 255, 255, 0.44);
	border-color: rgba(0, 122, 255, 0.62);
	box-shadow: var(--field-shadow), 0 0 0 4px rgba(0, 122, 255, 0.14);
}

.kdv-field.has-error .kdv-input {
	border-color: var(--danger);
	box-shadow: var(--field-shadow), 0 0 0 4px rgba(255, 59, 48, 0.12);
}

.kdv-error {
	color: var(--danger);
	display: block;
	font-size: 12px;
	font-weight: 600;
	min-height: 18px;
	padding-top: 6px;
}

.kdv-custom-rate {
	max-height: 0;
	opacity: 0;
	overflow: hidden;
	transform: translateY(-6px);
	transition: max-height 260ms ease, opacity 220ms ease, transform 220ms ease;
}

.kdv-custom-rate.is-visible {
	max-height: 104px;
	opacity: 1;
	transform: translateY(0);
}

.kdv-main-grid {
	border: 1px solid rgba(255, 255, 255, 0.32);
	border-radius: 20px;
	display: grid;
	grid-template-columns: minmax(280px, 1fr) minmax(300px, 1fr);
	overflow: hidden;
}

.kdv-panel {
	padding: 20px;
}

.kdv-panel + .kdv-panel {
	border-left: 1px solid rgba(255, 255, 255, 0.28);
}

.kdv-panel-title {
	color: var(--text-primary);
	font-size: 24px;
	font-weight: 700;
	letter-spacing: -0.02em;
	margin: 0 0 16px;
}

.kdv-actions {
	display: grid;
	gap: 12px;
	grid-template-columns: 1fr;
	margin-top: 2px;
}

.kdv-button {
	-webkit-appearance: none;
	appearance: none;
	align-items: center;
	background-clip: padding-box;
	border: 1px solid transparent;
	border-radius: 16px;
	color: var(--text-primary);
	cursor: pointer;
	display: inline-flex;
	font: 700 16px/1 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	justify-content: center;
	min-height: 52px;
	outline: none;
	padding: 0 18px;
	position: relative;
	text-align: center;
	text-decoration: none;
	transition: background 180ms ease, border-color 180ms ease, box-shadow 180ms ease, color 180ms ease, transform 120ms ease;
	user-select: none;
	vertical-align: middle;
	white-space: nowrap;
	width: 100%;
}

.kdv-button:active {
	transform: scale(0.97);
}

.kdv-button--primary {
	background: linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0)) var(--accent);
	box-shadow: 0 14px 30px rgba(0, 122, 255, 0.26);
	color: #fff;
	grid-column: span 1;
}

.kdv-button--primary:hover {
	background-color: var(--accent-hover);
}

.kdv-button--ghost {
	background: rgba(255, 255, 255, 0.12);
	border-color: rgba(255, 255, 255, 0.34);
	color: var(--accent);
}

.kdv-button--ghost:hover {
	background: rgba(255, 255, 255, 0.24);
	border-color: rgba(0, 122, 255, 0.28);
}

.kdv-button--ghost,
.kdv-button--ghost:hover,
.kdv-button--ghost:focus,
.kdv-button--ghost:active,
.kdv-button--ghost:visited {
	color: var(--accent);
}

.kdv-button--ghost:focus,
.kdv-button--ghost:focus-visible {
	background: rgba(255, 255, 255, 0.22);
	border-color: rgba(0, 122, 255, 0.45);
	box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.12);
	color: var(--accent);
}

.kdv-button--ghost:active {
	background: rgba(255, 255, 255, 0.3);
	border-color: rgba(0, 122, 255, 0.35);
	box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.25);
}

.kdv-result-card {
	background: rgba(238, 244, 251, 0.75);
	border: 1px solid rgba(255, 255, 255, 0.55);
	margin-top: 0;
	opacity: 1;
	padding: 16px;
	transform: none;
	transition: opacity 350ms ease-out, transform 350ms ease-out;
	visibility: visible;
}

.kdv-result-card.is-visible {
	opacity: 1;
	transform: translateY(0);
	visibility: visible;
}

.kdv-result-row {
	align-items: center;
	border-top: 1px solid rgba(28, 28, 30, 0.07);
	display: flex;
	gap: 18px;
	justify-content: space-between;
	padding: 12px 0;
	position: relative;
	z-index: 1;
}

.kdv-result-row:first-of-type {
	border-top: 0;
}

.kdv-result-row span {
	color: var(--text-secondary);
	font-size: 14px;
	font-weight: 500;
	line-height: 1.35;
}

.kdv-result-row strong {
	color: var(--text-primary);
	font-size: 18px;
	font-weight: 600;
	line-height: 1.35;
	text-align: right;
}

.kdv-result-row--text {
	align-items: flex-start;
	flex-direction: column;
	gap: 6px;
}

.kdv-result-row--text strong {
	text-align: left;
	word-break: break-word;
}

.kdv-result-actions {
	display: grid;
	gap: 12px;
	grid-template-columns: 1fr 1fr;
	margin-top: 12px;
	position: relative;
	z-index: 1;
}

.kdv-result-feedback {
	color: var(--text-secondary);
	font-size: 13px;
	font-weight: 600;
	margin: 10px 0 0;
	min-height: 20px;
	position: relative;
	z-index: 1;
}

.kdv-result-feedback.is-success {
	color: #0a7f3f;
}

.kdv-result-feedback.is-error {
	color: var(--danger);
}

.kdv-formula-note {
	background: rgba(255, 241, 199, 0.46);
	border: 1px solid rgba(245, 202, 66, 0.32);
	border-radius: 14px;
	color: #775d1c;
	font-size: 13px;
	font-weight: 600;
	line-height: 1.5;
	margin-top: 12px;
	padding: 12px;
}

.kdv-noscript {
	background: rgba(255, 59, 48, 0.1);
	border: 1px solid rgba(255, 59, 48, 0.22);
	border-radius: 14px;
	color: var(--danger);
	font-weight: 600;
	margin: 14px 0 0;
	padding: 12px 14px;
}

@media (max-width: 640px) {
	.kdv-calculator {
		margin: 22px auto;
		max-width: 100%;
	}

	.kdv-input-card,
	.kdv-result-card {
		padding: 20px;
	}

	.kdv-chip-group {
		display: grid;
		grid-template-columns: 1fr;
	}

	.kdv-mode-grid {
		grid-template-columns: 1fr;
	}

	.kdv-main-grid {
		grid-template-columns: 1fr;
	}

	.kdv-panel + .kdv-panel {
		border-left: 0;
		border-top: 1px solid rgba(255, 255, 255, 0.28);
	}

	.kdv-rate-group {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}

	.kdv-chip {
		width: 100%;
	}

	.kdv-actions {
		grid-template-columns: 1fr;
	}

	.kdv-result-actions {
		grid-template-columns: 1fr;
	}

	.kdv-result-row {
		align-items: flex-start;
		flex-direction: column;
		gap: 6px;
	}

	.kdv-result-row strong {
		text-align: left;
	}
}