/* Base: reset, type, layout primitives, buttons, accessibility. */

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

html {
	-webkit-text-size-adjust: 100%;
	text-size-adjust: 100%;
	scroll-padding-top: 6rem;
}

body {
	margin: 0;
	font-family: var(--hai-font);
	font-size: var(--hai-fs-body);
	font-weight: 400;
	line-height: 1.5;
	color: var(--hai-text);
	background: var(--hai-white);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: clip;
}

img,
svg,
video {
	max-width: 100%;
	height: auto;
	display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
	margin: 0 0 0.5em;
	font-family: var(--hai-font);
	color: var(--hai-heading);
	font-weight: 700;
	text-wrap: balance;
}

h1 {
	font-size: var(--hai-fs-h1);
	line-height: 1.1;
	font-weight: 800;
}

h2 {
	font-size: var(--hai-fs-h2);
	line-height: 1.1;
}

h3 {
	font-size: var(--hai-fs-h3);
	line-height: 1.2;
}

h4 {
	font-size: var(--hai-fs-h4);
	line-height: 1.4;
}

h5 {
	font-size: var(--hai-fs-h5);
	line-height: 1.5;
}

h6 {
	font-size: var(--hai-fs-h6);
	line-height: 1.5;
}

p {
	margin: 0 0 1em;
	text-wrap: pretty;
}

a {
	color: var(--hai-accent);
	text-underline-offset: 0.18em;
	transition: color var(--hai-speed) ease;
}

a:hover {
	color: var(--hai-accent-dark);
}

.hai-accent-text {
	color: var(--hai-accent);
}

/* Focus: always visible. */
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
	outline: 3px solid var(--hai-accent);
	outline-offset: 3px;
	border-radius: 6px;
}

.screen-reader-text {
	border: 0;
	clip: rect(1px, 1px, 1px, 1px);
	clip-path: inset(50%);
	height: 1px;
	width: 1px;
	margin: -1px;
	overflow: hidden;
	padding: 0;
	position: absolute !important;
	word-wrap: normal !important;
}

.skip-link:focus {
	position: fixed;
	top: 1rem;
	left: 1rem;
	z-index: 1000;
	clip: auto;
	clip-path: none;
	width: auto;
	height: auto;
	padding: 0.8rem 1.2rem;
	background: var(--hai-ink);
	color: var(--hai-white);
	border-radius: var(--hai-radius-btn);
	font-weight: 700;
	text-decoration: none;
}

/* Layout primitives. */
.hai-container {
	width: 100%;
	max-width: calc(var(--hai-container) + var(--hai-gutter) * 2);
	margin-inline: auto;
	padding-inline: var(--hai-gutter);
}

.hai-section {
	padding-block: var(--hai-section-y);
}

/* EduPro's signature: full-bleed bands inset from the viewport with rounded corners. */
.hai-band {
	margin-inline: var(--hai-inset);
	border-radius: var(--hai-radius-section);
	overflow: hidden;
}

.hai-band--alt {
	background: var(--hai-alt-bg);
}

.hai-band--wash {
	background: var(--hai-wash);
}

.hai-grid {
	display: grid;
	gap: clamp(1rem, 2vw, 1.75rem);
}

.hai-grid--3 {
	grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hai-grid--4 {
	grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 1024px) {
	.hai-grid--3,
	.hai-grid--4 {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

@media (max-width: 767px) {
	.hai-grid--3,
	.hai-grid--4 {
		grid-template-columns: minmax(0, 1fr);
	}
}

/* Buttons (EduPro: 135° gradient, 8px radius, offset shadow). */
.hai-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.55em;
	padding: 14px 28px;
	font: inherit;
	font-weight: 700;
	line-height: 1.2;
	text-decoration: none;
	border: 1px solid transparent;
	border-radius: var(--hai-radius-btn);
	cursor: pointer;
	transition:
		background var(--hai-speed) ease,
		box-shadow var(--hai-speed) ease,
		color var(--hai-speed) ease,
		transform var(--hai-speed) var(--hai-ease);
}

.hai-btn .hai-icon {
	width: 1.1em;
	height: 1.1em;
}

.hai-btn--primary {
	color: var(--hai-white);
	background: var(--hai-gradient);
	border-color: var(--hai-accent);
	box-shadow: var(--hai-shadow-btn);
}

.hai-btn--primary:hover,
.hai-btn--primary:focus-visible {
	color: var(--hai-white);
	background: var(--hai-gradient-rev);
	box-shadow: 0 0 0 0 var(--hai-glow);
}

.hai-btn--secondary {
	color: var(--hai-heading);
	background: var(--hai-white);
	border-color: var(--hai-border);
	box-shadow: var(--hai-shadow-btn);
}

.hai-btn--secondary:hover,
.hai-btn--secondary:focus-visible {
	color: var(--hai-heading);
	background: var(--hai-alt-bg);
	box-shadow: 0 0 0 0 var(--hai-glow);
}

.hai-btn--ghost {
	color: var(--hai-accent);
	background: transparent;
	border-color: currentColor;
}

.hai-btn--ghost:hover {
	color: var(--hai-white);
	background: var(--hai-accent);
}

/* Circular ↗ icon button. */
.hai-arrow-btn {
	display: inline-grid;
	place-items: center;
	width: 40px;
	height: 40px;
	border-radius: 50%;
	color: var(--hai-white);
	background: var(--hai-gradient);
	transition:
		transform var(--hai-speed) var(--hai-ease),
		background var(--hai-speed) ease;
}

.hai-arrow-btn .hai-icon {
	width: 18px;
	height: 18px;
}

.hai-arrow-btn:hover,
.hai-arrow-btn:focus-visible {
	color: var(--hai-white);
	background: var(--hai-accent-dark);
	transform: rotate(45deg);
}

.hai-icon {
	width: 1.25em;
	height: 1.25em;
	flex: none;
}

/* Motion off when asked. */
@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.001ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.001ms !important;
		scroll-behavior: auto !important;
	}
}