/*
	TQHCFR Design System Scaffolding
	- Tokens
	- Base styles
	- Layout utilities
	- Components
*/

@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600;700&display=swap");

:root {
	/* Colors */
	--color-bg: #fff8e6;
	--color-surface: #ffffff;
	--color-surface-2: #fff3cc;
	--color-border: #111111;
	--color-text: #111111;
	--color-muted: #3f3f3f;
	--color-primary: #ff6b6b;
	--color-primary-strong: #ff3b3b;
	--color-accent: #7c3aed;
	--color-warning: #f59e0b;
	--color-danger: #ef4444;

	/* Typography */
	--font-sans: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	--font-mono: "Space Grotesk", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
	--text-xs: 0.75rem;
	--text-sm: 0.875rem;
	--text-md: 1rem;
	--text-lg: 1.125rem;
	--text-xl: 1.25rem;
	--text-2xl: 1.5rem;
	--text-3xl: 2rem;

	/* Spacing */
	--space-1: 0.25rem;
	--space-2: 0.5rem;
	--space-3: 0.75rem;
	--space-4: 1rem;
	--space-5: 1.25rem;
	--space-6: 1.5rem;
	--space-8: 2rem;
	--space-10: 2.5rem;
	--space-12: 3rem;
	--space-16: 4rem;

	/* Radius */
	--radius-sm: 0.25rem;
	--radius-md: 0.5rem;
	--radius-lg: 0.75rem;
	--radius-pill: 999px;
  --radius-none: 0;

	/* Shadows */
	--shadow-sm: 4px 4px 0 #111111;
	--shadow-md: 8px 8px 0 #111111;

	/* Motion */
	--ease-standard: cubic-bezier(0.25, 0.6, 0.2, 1);
	--duration-fast: 120ms;
	--duration-med: 200ms;
}

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

html,
body {
	margin: 0;
	padding: 0;
}

body {
	font-family: var(--font-sans);
	font-size: var(--text-md);
	color: var(--color-text);
	background: var(--color-bg);
	line-height: 1.6;
}

img {
	max-width: 100%;
	display: block;
}

a {
	color: inherit;
	text-decoration: none;
}

h1,
h2,
h3 {
	line-height: 1.2;
	margin: 0 0 var(--space-4);
}

p {
	margin: 0 0 var(--space-4);
}

code {
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	color: var(--color-accent);
	background: #ffffff;
	border: 2px solid var(--color-border);
	padding: 0 var(--space-1);
}

/* Layout utilities */
.container {
	width: min(1100px, 92%);
	margin: 0 auto;
}

.stack {
	display: flex;
	flex-direction: column;
	gap: var(--space-4);
}

.cluster {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--space-3);
}

.grid {
	display: grid;
	gap: var(--space-6);
}

.grid-3 {
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.section {
	padding: var(--space-12) 0;
}

.eyebrow {
	text-transform: uppercase;
	letter-spacing: 0.12em;
	font-size: var(--text-xs);
	color: var(--color-muted);
}

/* Components */
.surface {
	background: var(--color-surface);
	border: 3px solid var(--color-border);
	border-radius: var(--radius-none);
	box-shadow: var(--shadow-sm);
}

.nav {
	padding: var(--space-4) 0;
	border-bottom: 3px solid var(--color-border);
}

.nav__brand {
	font-weight: 700;
	font-size: var(--text-lg);
	text-transform: uppercase;
}

.nav__links a {
	color: var(--color-text);
	transition: color var(--duration-fast) var(--ease-standard);
}

.nav__links a:hover {
	color: var(--color-primary-strong);
}

.hero {
	padding: var(--space-12) 0 var(--space-16);
}

.hero__title {
	font-size: clamp(2.4rem, 3vw, 3.2rem);
	text-transform: uppercase;
}

.hero__subtitle {
	color: var(--color-muted);
	max-width: 60ch;
}

.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: var(--space-3) var(--space-5);
	border-radius: var(--radius-none);
	border: 3px solid var(--color-border);
	font-weight: 700;
	cursor: pointer;
	transition: transform var(--duration-fast) var(--ease-standard),
		box-shadow var(--duration-fast) var(--ease-standard),
		background var(--duration-fast) var(--ease-standard),
		border-color var(--duration-fast) var(--ease-standard);
}

.btn:focus-visible {
	outline: 3px solid #111111;
	outline-offset: 2px;
}

.btn-primary {
	background: var(--color-primary);
	color: #111111;
	box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
	transform: translate(-2px, -2px);
	box-shadow: var(--shadow-md);
}

.btn-ghost {
	background: transparent;
	border-color: var(--color-border);
	color: var(--color-text);
}

.card {
	padding: var(--space-6);
	display: flex;
	flex-direction: column;
	gap: var(--space-3);
}

.badge {
	display: inline-flex;
	align-items: center;
	padding: 0 var(--space-3);
	height: 1.75rem;
	border-radius: var(--radius-none);
	background: #ffd166;
	color: #111111;
	border: 2px solid var(--color-border);
	font-size: var(--text-xs);
	font-weight: 700;
}

.input {
	width: 100%;
	padding: var(--space-3) var(--space-4);
	border-radius: var(--radius-none);
	border: 3px solid var(--color-border);
	background: #ffffff;
	color: var(--color-text);
	font-size: var(--text-md);
}

.input::placeholder {
	color: var(--color-muted);
}

.input:focus {
	outline: 3px solid #111111;
	border-color: #111111;
}

.alert {
	padding: var(--space-4) var(--space-5);
	border-radius: var(--radius-none);
	border: 3px solid var(--color-border);
	background: #ffe066;
	color: #111111;
	box-shadow: var(--shadow-sm);
}

.token {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-3);
	padding: var(--space-3) var(--space-4);
	border-radius: var(--radius-none);
	background: #ffffff;
	border: 3px solid var(--color-border);
	font-size: var(--text-sm);
}

.swatch {
	width: 1.75rem;
	height: 1.75rem;
	border-radius: var(--radius-sm);
	border: 2px solid var(--color-border);
}

.calculator {
	gap: var(--space-8);
}

.form-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: var(--space-5);
}

.results-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
	gap: var(--space-6);
}

.result {
	border: 3px solid var(--color-border);
	background: var(--color-surface-2);
	padding: var(--space-4);
  gap: var(--space-1);
	box-shadow: var(--shadow-sm);
}

.result strong {
	font-size: var(--text-2xl);
	text-transform: uppercase;
}

.table-wrap {
	width: 100%;
	overflow-x: auto;
	border: 3px solid var(--color-border);
	box-shadow: var(--shadow-sm);
}

.table {
	width: 100%;
	border-collapse: collapse;
	background: #ffffff;
}

.table th,
.table td {
	border-bottom: 3px solid var(--color-border);
	padding: var(--space-3);
	text-align: left;
}

.table th {
	background: var(--color-surface-2);
	text-transform: uppercase;
	font-size: var(--text-xs);
	letter-spacing: 0.08em;
}

.table tbody tr:last-child td {
	border-bottom: none;
}

.skid-visual {
	display: grid;
	gap: var(--space-6);
	align-items: center;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.skid-wheel {
	width: min(320px, 100%);
	justify-self: center;
	background: var(--color-surface-2);
	border: 3px solid var(--color-border);
	box-shadow: var(--shadow-sm);
}

.skid-tyre {
	fill: var(--color-border);
  fill-opacity: 0.6;
	stroke: var(--color-border);
	stroke-width: 6;
}

.skid-rim {
  fill: var(--color-surface-2);
  stroke: var(--color-border);
  stroke-width: 2;
}

.skid-hub {
	fill: var(--color-surface-2);
  stroke: var(--color-border);
  stroke-width: 5;
}

.skid-spoke {
	stroke: var(--color-border);
	stroke-width: 1.5;
	opacity: 0.6;
}

.skid-patch {
	stroke: var(--color-primary-strong);
	stroke-width: 6;
	stroke-linecap: square;
}

.skid-patch--left {
	stroke: var(--color-primary-strong);
}

.skid-patch--right {
	stroke: var(--color-accent);
}

.checkbox {
	display: inline-flex;
	align-items: center;
	gap: var(--space-3);
	font-weight: 600;
}

.checkbox input[type="checkbox"] {
	position: absolute;
	opacity: 0;
	pointer-events: none;
}

.checkbox__box {
	width: 2rem;
	height: 2rem;
	border: 3px solid var(--color-border);
	background: #ffffff;
	position: relative;
}

.checkbox__box::after {
	content: "";
	position: absolute;
	left: 0.5rem;
	top: 0.2rem;
	width: 0.6rem;
	height: 0.9rem;
	border-right: 3px solid var(--color-border);
	border-bottom: 3px solid var(--color-border);
	transform: rotate(45deg) scale(0);
	transform-origin: center;
	transition: transform var(--duration-fast) var(--ease-standard);
}

.checkbox input[type="checkbox"]:checked + .checkbox__box {
  background-color: var(--color-primary);
}

.checkbox input[type="checkbox"]:checked + .checkbox__box::after {
  transform: rotate(45deg) scale(1);
}

.checkbox input[type="checkbox"]:focus-visible + .checkbox__box {
	outline: 3px solid #111111;
	outline-offset: 2px;
}

.custom-select {
	position: relative;
	width: 100%;
}

.custom-select__trigger {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-3);
	text-align: left;
	background: #ffffff;
}

.custom-select__caret {
	width: 0;
	height: 0;
	border-left: 6px solid transparent;
	border-right: 6px solid transparent;
	border-top: 8px solid var(--color-text);
}

.custom-select__menu {
	position: absolute;
	left: 0;
	right: 0;
	top: calc(100% + 6px);
	border: 3px solid var(--color-border);
	background: #ffffff;
	
	max-height: 240px;
	overflow-y: auto;
	display: none;
	z-index: 10;
}

.custom-select__menu.is-open {
	display: block;
}

.custom-select__option {
	width: 100%;
	padding: var(--space-3) var(--space-4);
	border: none;
	border-bottom: 3px solid var(--color-border);
	background: #ffffff;
	font: inherit;
	text-align: left;
	cursor: pointer;
}

.custom-select__option:last-child {
	border-bottom: none;
}

.custom-select__option:hover,
.custom-select__option:focus-visible {
	background: var(--color-surface-2);
}

footer {
	padding: var(--space-10) 0;
	color: var(--color-muted);
	border-top: 3px solid var(--color-border);
}