:root {
	--bg: #0f1720;
	--surface: #161f2b;
	--surface-light: #1d2735;

	--border: #2d3948;

	--text: #f3f6fb;
	--muted: #93a1b5;

	--accent: #8ba4d8;

	--radius: 10px;

	--transition: 0.16s ease;
}

* {
	box-sizing: border-box;
}

html {
	min-height: 100%;
}

body {
	margin: 0;
	min-height: 100vh;

	font-family:
		Inter,
		ui-sans-serif,
		system-ui,
		-apple-system,
		BlinkMacSystemFont,
		"Segoe UI",
		sans-serif;

	background: linear-gradient(180deg, #131c27 0%, var(--bg) 100%);
	color: var(--text);
}

button,
input {
	font: inherit;
}

button {
	border: 0;
	background: none;
	cursor: pointer;
}

input {
	width: 100%;
	border: 0;
	outline: 0;
	background: transparent;

	color: var(--text);

	font-size: 21px;
	font-weight: 600;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
	appearance: none;
	margin: 0;
}

input[type="number"] {
	appearance: textfield;
	-moz-appearance: textfield;
}

::selection {
	background: var(--accent);
	color: var(--surface);
}

.app {
	position: relative;

	width: min(1120px, calc(100% - 32px));
	margin: 0 auto;

	padding: 30px 0;
}

.top-actions {
	position: absolute;
	top: 32px;
	right: 0;
}

.api-button, .badge, .card, .settings, .modal-panel, .input-wrap, .setting input, .close-button, pre {
	border: 1px solid var(--border);
	border-radius: var(--radius);
}

.api-button,
.badge,
.card,
.settings,
.modal-panel {
	background: var(--surface);
}

.input-wrap, .setting input, .close-button, pre {
	background: var(--surface-light);
}

.api-button {
	display: inline-flex;
	align-items: center;
	justify-content: center;

	height: 28px;
	padding: 0 11px;

	color: var(--text);

	font-size: 14px;
	font-weight: 600;

	transition:
		background var(--transition),
		border-color var(--transition);
}

.api-button:hover,
.close-button:hover {
	background: #243142;
	border-color: #405065;
}

.hero {
	display: grid;
	gap: 14px;

	margin-bottom: 32px;
	padding-right: 80px;
}

.badge {
	width: fit-content;

	padding: 7px 12px;

	color: var(--accent);

	font-size: 11px;
	font-weight: 700;

	letter-spacing: 0.08em;
	text-transform: uppercase;
}

h1,
h2,
h3,
p {
	margin-top: 0;
}

h1 {
	margin-bottom: 0;

	font-size: clamp(36px, 6vw, 64px);
	letter-spacing: -0.05em;
	font-weight: normal;
}

.hero p {
	max-width: 700px;
	margin-bottom: 0;

	color: var(--muted);

	font-size: 16px;
	line-height: 1.7;
}

.grid {
	display: grid;
	grid-template-columns: 1fr 2fr;
	gap: 20px;

	align-items: stretch;
}

.conversion-group {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 12px;
}

.card {
	display: flex;
	flex-direction: column;

	padding: 20px;
}

.card h2 {
	margin-bottom: 8px;

	font-size: 18px;
	font-weight: 700;

	letter-spacing: -0.03em;
}

.card p {
	min-height: 48px;
	margin-bottom: 18px;

	color: var(--muted);

	font-size: 14px;
	line-height: 1.6;
}

.field,
.setting {
	display: grid;
	gap: 8px;
}

label,
.result small {
	color: var(--muted);

	font-size: small;
	font-weight: bold;

}

.input-wrap {
	display: flex;
	align-items: center;
	gap: 10px;

	padding: 10px 14px;

	transition:
		background var(--transition),
		border-color var(--transition);
}

.input-wrap:focus-within,
.setting input:focus {
	background: #243142;
	border-color: #405065;
}

.input-wrap span {
	color: var(--muted);
	font-weight: 600;
}

.result {
	margin-top: 20px;
	padding: 10px;
}

.result small {
	display: block;
	margin-bottom: 6px;
}

.result strong {
	display: block;

	font-size: clamp(30px, 4vw, 42px);
	line-height: 1;

	letter-spacing: -0.05em;

	word-break: break-word;
}

.result em {
	display: block;
	margin-top: 8px;

	color: var(--accent);

	font-size: 13px;
	font-style: normal;
	font-weight: 600;
}

.settings {
	grid-column: 1 / -1;

	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 20px;

	padding: 20px;
}

.setting input {
	padding: 10px 12px;

	font-size: 15px;

	transition:
		background var(--transition),
		border-color var(--transition);
}

.note,
.hero p,
.card p,
.modal-header p,
.input-wrap span {
	color: var(--muted);
}

.note {
	margin: 18px 0 0;

	font-size: 13px;
	line-height: 1.6;
}

.inside-card {
	margin-top: auto;
	padding-top: 12px;

	font-size: 12px;
	line-height: 1.5;
}

.accent,
.api-section h3 {
	color: var(--accent);
}

.modal {
	position: fixed;
	inset: 0;
	z-index: 20;

	display: none;
	place-items: center;

	padding: 20px;

	background: #060b12d8;
	backdrop-filter: blur(4px);
}

.modal.is-open {
	display: grid;
	animation: modalFade 0.18s ease;
}

.modal.is-open .modal-panel {
	animation: modalScale 0.18s ease;
}

.modal-panel {
	width: min(780px, 100%);
	max-height: min(760px, calc(100vh - 40px));

	display: flex;
	flex-direction: column;
	overflow: hidden;
}

.modal-header {
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: 18px;

	padding: 20px;

	border-bottom: 1px solid var(--border);

	background: var(--surface-light);
}

.modal-header h2 {
	margin-bottom: 0;

	font-size: 25px;

	letter-spacing: -0.04em;
}

.modal-header p {
	margin: 6px 0 0;

	line-height: 1.6;
}

.modal-body {
	flex: 1 1 auto;
	min-height: 0;
	overflow: auto;

	padding: 20px;
}

.close-button {
	display: grid;
	place-items: center;

	width: 36px;
	height: 36px;

	color: var(--text);

	font-size: 18px;

	transition:
		background var(--transition),
		border-color var(--transition);
}

.api-section {
	display: grid;
	gap: 10px;

	margin-top: 16px;
}

.api-section:first-child {
	margin-top: 0;
}

.api-section h3 {
	margin-bottom: 0;

	font-size: 14px;
	font-weight: 700;
}

code,
pre {
	font-family:
		ui-monospace,
		SFMono-Regular,
		Menlo,
		Monaco,
		Consolas,
		"Liberation Mono",
		monospace;
}

pre {
	overflow: auto;

	margin: 0;
	padding: 16px;

	color: #dce6f5;

	font-size: 13px;
	line-height: 1.65;
}

.inline-code {
	padding: 2px 6px;

	border-radius: 4px;

	background: #223146;
	color: var(--accent);
}

@keyframes modalFade {
	from {
		opacity: 0;
	}

	to {
		opacity: 1;
	}
}

@keyframes modalScale {
	from {
		opacity: 0;
		transform: scale(0.985) translateY(4px);
	}

	to {
		opacity: 1;
		transform: scale(1) translateY(0);
	}
}

@media (max-width: 900px) {
	.app {
		padding-top: 32px;
	}

	.hero {
		padding-right: 0;
	}

	.grid,
	.conversion-group,
	.settings {
		grid-template-columns: 1fr;
	}

	.card p {
		min-height: auto;
	}
}

@media (max-width: 520px) {
	.app {
		width: min(100% - 20px, 1120px);
		padding-bottom: 32px;
	}

	.card,
	.settings,
	.modal-panel,
	.input-wrap,
	.setting input,
	.result,
	pre {
		border-radius: 8px;
	}

	.card {
		padding: 18px;
	}

	.hero p {
		font-size: 15px;
	}

	input {
		font-size: 19px;
	}

	.modal {
		padding: 10px;
	}

	.modal-header,
	.modal-body {
		padding: 18px;
	}
}