/*
	Jonathan Foong — V3 homepage styles
	Zero-build, framework-free CSS. Mobile-first, progressive enhancement.
*/

/* ---------- Reset (minimal) ---------- */

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

/* Keep the hidden attribute authoritative over component display values */
[hidden] { display: none !important; }

html {
	background: var(--color-bg);
	color-scheme: dark;
	scroll-padding-top: calc(var(--nav-height) + var(--space-4));
}

@media (prefers-reduced-motion: no-preference) {
	html { scroll-behavior: smooth; }
}

body {
	margin: 0;
	min-height: 100vh;
	background: var(--color-bg);
	color: var(--color-text);
	font-family: var(--font-sans);
	font-size: var(--fs-body);
	line-height: var(--lh-body);
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
	overflow-x: hidden;
}

/* Prevent background scroll while the mobile menu is open */
body.nav-open { overflow: hidden; }

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

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

h1, h2, h3, p, ul, figure { margin: 0; }

ul { padding: 0; list-style: none; }

button {
	font: inherit;
	color: inherit;
	background: none;
	border: 0;
	cursor: pointer;
}

/* Visible, high-contrast focus state everywhere */
:focus-visible {
	outline: 2px solid var(--color-focus-ring);
	outline-offset: 3px;
	border-radius: var(--radius-sm);
}

/* ---------- Utilities ---------- */

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

.skip-link {
	position: absolute;
	top: -100%;
	left: var(--space-4);
	z-index: 1000;
	padding: var(--space-3) var(--space-5);
	background: var(--color-text);
	color: var(--color-bg);
	border-radius: var(--radius-sm);
	font-weight: 600;
	transition: top var(--duration-fast) var(--ease-standard);
}

.skip-link:focus {
	top: var(--space-4);
}

.container {
	width: 100%;
	max-width: var(--container-max);
	margin-inline: auto;
	padding-inline: var(--container-pad);
}

.eyebrow {
	display: block;
	font-size: var(--fs-eyebrow);
	font-weight: 600;
	letter-spacing: var(--tracking-eyebrow);
	text-transform: uppercase;
	color: var(--color-accent-strong);
	margin-bottom: var(--space-3);
}

.section {
	padding-block: var(--space-9);
}

.section-head {
	max-width: 42rem;
	margin-bottom: var(--space-7);
}

.section-head h2 {
	font-size: var(--fs-h2);
	line-height: var(--lh-tight);
	letter-spacing: var(--tracking-tight);
	font-weight: 600;
}

.btn {
	display: inline-flex;
	align-items: center;
	gap: var(--space-2);
	padding: 0.85rem 1.5rem;
	border-radius: var(--radius-pill);
	font-size: 0.95rem;
	font-weight: 600;
	border: 1px solid transparent;
	transition: background var(--duration-fast) var(--ease-standard),
		border-color var(--duration-fast) var(--ease-standard),
		transform var(--duration-fast) var(--ease-standard);
}

.btn--primary {
	background: var(--color-accent);
	color: #0b0d10;
}

.btn--primary:hover { background: var(--color-accent-strong); }

.btn--ghost {
	border-color: var(--color-border-strong);
	color: var(--color-text);
	background: rgba(255, 255, 255, 0.03);
}

.btn--ghost:hover {
	border-color: var(--color-accent);
	background: var(--color-accent-soft);
}

@media (prefers-reduced-motion: no-preference) {
	.btn:active { transform: scale(0.97); }
}

.tag-list {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-2);
	margin-top: var(--space-4);
}

.tag {
	padding: 0.3rem 0.75rem;
	font-size: 0.72rem;
	font-weight: 600;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	color: var(--color-text-secondary);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-sm);
}

/* Glass surface — reserved for nav, project cards, and CTA panels only */
.glass {
	background: var(--glass-bg);
	border: 1px solid var(--color-border);
	box-shadow: var(--shadow-md);
}

@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
	.glass {
		background: var(--glass-bg);
		-webkit-backdrop-filter: blur(var(--glass-blur)) saturate(140%);
		backdrop-filter: blur(var(--glass-blur)) saturate(140%);
	}
}

/* Scroll-reveal: only applied once JS confirms observation; content is visible by default */
[data-reveal].is-observing {
	opacity: 0;
	transform: translateY(14px);
	transition: opacity var(--duration-slow) var(--ease-standard),
		transform var(--duration-slow) var(--ease-standard);
}

[data-reveal].is-visible {
	opacity: 1;
	transform: none;
}

/* ---------- Atmospheric background (pure CSS, static) ---------- */

.atmosphere {
	position: fixed;
	inset: 0;
	z-index: -1;
	background:
		radial-gradient(60% 45% at 82% -8%, rgba(124, 134, 240, 0.16), transparent 60%),
		radial-gradient(45% 35% at 8% 12%, rgba(124, 134, 240, 0.08), transparent 65%),
		var(--color-bg);
}

/* ---------- Nav ---------- */

.site-nav {
	position: sticky;
	top: var(--space-4);
	z-index: 100;
	margin-inline: auto;
	margin-bottom: calc(var(--space-9) * -1 + var(--space-8));
	max-width: calc(var(--container-max) - 2 * var(--container-pad));
	border-radius: var(--radius-pill);
	transition: background var(--duration-base) var(--ease-standard),
		box-shadow var(--duration-base) var(--ease-standard);
}

.site-nav-shell {
	padding-inline: var(--container-pad);
	padding-top: var(--space-4);
}

.site-nav__bar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: var(--nav-height);
	padding-inline: var(--space-5);
	border-radius: var(--radius-pill);
}

.site-nav--scrolled .site-nav__bar {
	box-shadow: var(--shadow-md);
}

.site-nav__brand {
	font-weight: 700;
	letter-spacing: 0.02em;
	font-size: 1.05rem;
}

.nav-menu {
	display: flex;
	align-items: center;
	gap: var(--space-6);
	flex-wrap: wrap;
}

.nav-menu a {
	font-size: 0.92rem;
	font-weight: 500;
	color: var(--color-text-secondary);
	transition: color var(--duration-fast) var(--ease-standard);
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
	color: var(--color-text);
}

/* Higher specificity than ".nav-menu a" so the CTA keeps its dark-on-accent contrast */
.nav-menu a.btn--primary,
.nav-menu a.btn--primary:hover,
.nav-menu a.btn--primary:focus-visible {
	color: #0b0d10;
}

.nav-menu .btn { margin-left: var(--space-2); }

.nav-toggle {
	display: none;
	width: 2.5rem;
	height: 2.5rem;
	align-items: center;
	justify-content: center;
	border-radius: 50%;
}

.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
	display: block;
	width: 1.15rem;
	height: 2px;
	background: var(--color-text);
	border-radius: 2px;
	transition: transform var(--duration-fast) var(--ease-standard),
		opacity var(--duration-fast) var(--ease-standard);
}

.nav-toggle__icon { position: relative; }

.nav-toggle__icon::before,
.nav-toggle__icon::after {
	content: "";
	position: absolute;
	left: 0;
}

.nav-toggle__icon::before { top: -6px; }
.nav-toggle__icon::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__icon { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after { transform: translateY(-6px) rotate(-45deg); }

/* JS-enhanced collapsible nav (small screens only, and only once JS confirms it's active) */
.js .site-nav {
	--nav-collapse: 760px;
}

@media (max-width: 760px) {
	.js .nav-toggle {
		display: inline-flex;
	}

	.js .nav-menu {
		position: absolute;
		inset-inline: var(--container-pad);
		top: calc(var(--nav-height) + var(--space-3));
		flex-direction: column;
		align-items: stretch;
		gap: var(--space-1);
		padding: var(--space-4);
		border-radius: var(--radius-md);
		background: var(--glass-bg-strong);
		border: 1px solid var(--color-border);
		box-shadow: var(--shadow-lg);
		transform-origin: top center;
	}

	.js .nav-menu[data-open="false"] {
		display: none;
	}

	.js .nav-menu a {
		padding: var(--space-3) var(--space-2);
		border-radius: var(--radius-sm);
	}

	.js .nav-menu .btn { margin-left: 0; margin-top: var(--space-2); justify-content: center; }
}

/* ---------- Hero ---------- */

.hero {
	padding-top: calc(var(--nav-height) + var(--space-8));
	padding-bottom: var(--space-9);
	display: grid;
	gap: var(--space-7);
}

.hero__name {
	font-size: var(--fs-h1);
	font-weight: 700;
	line-height: var(--lh-tight);
	letter-spacing: var(--tracking-tight);
	max-width: 14ch;
}

.hero__tagline {
	margin-top: var(--space-5);
	font-size: var(--fs-body-lg);
	color: var(--color-text-secondary);
	max-width: 34ch;
}

.hero__meta {
	display: flex;
	flex-direction: column;
	gap: var(--space-6);
	padding-top: var(--space-2);
	border-top: 1px solid var(--color-border);
}

.hero__summary {
	color: var(--color-text-secondary);
	max-width: 46ch;
	font-size: var(--fs-body-lg);
}

.hero__actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-4);
}

@media (min-width: 900px) {
	.hero {
		grid-template-columns: 1.3fr 1fr;
		align-items: end;
	}

	.hero__meta {
		border-top: none;
		border-left: 1px solid var(--color-border);
		padding-left: var(--space-7);
		padding-top: 0;
	}
}

/* ---------- Proof strip ---------- */

.proof__list {
	display: grid;
	gap: var(--space-6);
	grid-template-columns: 1fr;
	padding-block: var(--space-6);
	border-top: 1px solid var(--color-border);
	border-bottom: 1px solid var(--color-border);
}

.proof__list li {
	display: flex;
	flex-direction: column;
	gap: var(--space-1);
}

.proof__label {
	font-size: 0.72rem;
	font-weight: 600;
	letter-spacing: var(--tracking-eyebrow);
	text-transform: uppercase;
	color: var(--color-text-tertiary);
}

.proof__value {
	font-size: 1.05rem;
	font-weight: 500;
	color: var(--color-text);
}

@media (min-width: 700px) {
	.proof__list { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Selected work ---------- */

.work__grid {
	display: grid;
	gap: var(--space-6);
	grid-template-columns: 1fr;
}

@media (min-width: 700px) {
	.work__grid { grid-template-columns: repeat(2, 1fr); }
}

.project-card {
	display: flex;
	flex-direction: column;
	border-radius: var(--radius-lg);
	overflow: hidden;
	transition: transform var(--duration-base) var(--ease-standard),
		box-shadow var(--duration-base) var(--ease-standard);
}

@media (prefers-reduced-motion: no-preference) {
	.project-card:hover {
		transform: translateY(-4px);
		box-shadow: var(--shadow-lg);
	}
}

.project-card__media {
	display: block;
	aspect-ratio: 16 / 9;
	overflow: hidden;
	background: var(--color-bg-alt);
}

.project-card__media img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform var(--duration-slow) var(--ease-standard);
}

@media (prefers-reduced-motion: no-preference) {
	.project-card:hover .project-card__media img { transform: scale(1.04); }
}

.project-card__body {
	padding: var(--space-5);
	display: flex;
	flex-direction: column;
	flex: 1;
}

.project-card__body h3 {
	font-size: 1.15rem;
	font-weight: 600;
	margin-bottom: var(--space-2);
}

.project-card__body p {
	color: var(--color-text-secondary);
	font-size: 0.92rem;
}

.project-card__link {
	margin-top: var(--space-5);
	font-size: 0.85rem;
	font-weight: 600;
	color: var(--color-accent-strong);
	align-self: flex-start;
}

.project-card__link:hover { color: var(--color-text); }

/* ---------- Contact CTA ---------- */

.contact-cta__panel {
	padding: var(--space-8) var(--container-pad);
	border-radius: var(--radius-lg);
	text-align: center;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--space-5);
}

.contact-cta__panel h2 {
	font-size: var(--fs-h2);
	font-weight: 600;
	line-height: var(--lh-tight);
	max-width: 20ch;
}

.contact-cta__panel > p {
	color: var(--color-text-secondary);
	max-width: 40ch;
}

.contact-links {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: var(--space-3);
}

.contact-links a {
	display: inline-flex;
	align-items: center;
	gap: var(--space-2);
	padding: 0.65rem 1.15rem;
	border-radius: var(--radius-pill);
	border: 1px solid var(--color-border);
	font-size: 0.88rem;
	font-weight: 500;
	transition: border-color var(--duration-fast) var(--ease-standard),
		background var(--duration-fast) var(--ease-standard);
}

.contact-links a:hover {
	border-color: var(--color-accent);
	background: var(--color-accent-soft);
}

/* ---------- Footer ---------- */

.site-footer {
	padding-block: var(--space-6);
	border-top: 1px solid var(--color-border);
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-3);
	align-items: center;
	justify-content: space-between;
	color: var(--color-text-tertiary);
	font-size: 0.85rem;
}

.site-footer a { color: var(--color-text-secondary); }
.site-footer a:hover { color: var(--color-text); }

.site-footer__links {
	display: flex;
	gap: var(--space-5);
	flex-wrap: wrap;
}