/*
Theme Name: Nirwan Portfolio
Theme URI: https://nirwangoel.com/
Author: Nirwan Goel
Author URI: https://nirwangoel.com/
Description: A clean, fast, accessible portfolio theme built from scratch. Ships with a Project post type, a filterable work archive, a configurable home page, and no external dependencies.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: nirwan-portfolio
Tags: portfolio, custom-menu, custom-logo, featured-images, translation-ready, block-styles, wide-blocks, accessibility-ready
*/

/* --------------------------------------------------------------
 * 1. Design tokens
 * ----------------------------------------------------------- */
:root {
	--color-bg: #ffffff;
	--color-surface: #f6f6f4;
	--color-fg: #14151a;
	--color-muted: #6b6f76;
	--color-border: #e3e3df;
	--color-accent: #1f4fd8;
	--color-accent-fg: #ffffff;

	--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
	--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

	--step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.9rem);
	--step-0: clamp(1rem, 0.96rem + 0.2vw, 1.09rem);
	--step-1: clamp(1.2rem, 1.1rem + 0.5vw, 1.5rem);
	--step-2: clamp(1.5rem, 1.3rem + 1vw, 2.1rem);
	--step-3: clamp(1.9rem, 1.5rem + 2vw, 3rem);
	--step-4: clamp(2.4rem, 1.7rem + 3.4vw, 4.5rem);

	--space-2xs: 0.375rem;
	--space-xs: 0.75rem;
	--space-s: 1.25rem;
	--space-m: 2rem;
	--space-l: 3.5rem;
	--space-xl: 6rem;

	--radius: 10px;
	--container: 1140px;
	--container-narrow: 720px;
	--transition: 180ms ease;
}

@media (prefers-color-scheme: dark) {
	:root:not([data-theme="light"]) {
		--color-bg: #0f1115;
		--color-surface: #171a20;
		--color-fg: #f2f3f5;
		--color-muted: #9aa0aa;
		--color-border: #262a32;
		--color-accent: #7aa2ff;
		--color-accent-fg: #0f1115;
	}
}

/* --------------------------------------------------------------
 * 2. Reset & base
 * ----------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
	margin: 0;
	background-color: var(--color-bg);
	color: var(--color-fg);
	font-family: var(--font-sans);
	font-size: var(--step-0);
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
	margin: 0 0 var(--space-xs);
	font-weight: 650;
	line-height: 1.15;
	letter-spacing: -0.02em;
	text-wrap: balance;
}

h1 { font-size: var(--step-4); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); }

p, ul, ol, dl, table, figure, pre, blockquote { margin: 0 0 var(--space-s); }

a { color: var(--color-accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
	outline: 2px solid var(--color-accent);
	outline-offset: 3px;
	border-radius: 3px;
}

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

figure > img { border-radius: var(--radius); }

blockquote {
	padding-left: var(--space-s);
	border-left: 3px solid var(--color-accent);
	color: var(--color-muted);
	font-size: var(--step-1);
	font-style: italic;
}

code, kbd, pre { font-family: var(--font-mono); font-size: 0.9em; }

code { background: var(--color-surface); padding: 0.15em 0.4em; border-radius: 4px; }

pre {
	background: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	padding: var(--space-s);
	overflow-x: auto;
}

pre code { background: none; padding: 0; }

hr { border: 0; border-top: 1px solid var(--color-border); margin: var(--space-l) 0; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: var(--space-2xs) var(--space-xs); border-bottom: 1px solid var(--color-border); text-align: left; }

/* --------------------------------------------------------------
 * 3. Layout helpers
 * ----------------------------------------------------------- */
.container {
	width: 100%;
	max-width: var(--container);
	margin-inline: auto;
	padding-inline: var(--space-s);
}

.container--narrow { max-width: var(--container-narrow); }

.section { padding-block: var(--space-xl); }
.section--tight { padding-block: var(--space-l); }
.section--surface { background: var(--color-surface); }

.section__head {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	justify-content: space-between;
	gap: var(--space-xs);
	margin-bottom: var(--space-m);
}

.eyebrow {
	margin: 0 0 var(--space-2xs);
	font-size: var(--step--1);
	font-weight: 600;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--color-muted);
}

.lede { font-size: var(--step-1); color: var(--color-muted); max-width: 60ch; }

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

.skip-link {
	position: absolute;
	left: var(--space-s);
	top: -100px;
	z-index: 999;
	padding: 0.7em 1.2em;
	background: var(--color-fg);
	color: var(--color-bg);
	border-radius: var(--radius);
	text-decoration: none;
	transition: top var(--transition);
}
.skip-link:focus { top: var(--space-s); }

/* --------------------------------------------------------------
 * 4. Buttons
 * ----------------------------------------------------------- */
.button,
.wp-block-button__link,
input[type="submit"],
button.submit {
	display: inline-flex;
	align-items: center;
	gap: 0.5em;
	padding: 0.75em 1.4em;
	border: 1px solid var(--color-accent);
	border-radius: 999px;
	background: var(--color-accent);
	color: var(--color-accent-fg);
	font: inherit;
	font-weight: 600;
	line-height: 1.2;
	text-decoration: none;
	cursor: pointer;
	transition: transform var(--transition), opacity var(--transition);
}

.button:hover,
input[type="submit"]:hover { opacity: 0.88; transform: translateY(-1px); }

.button--ghost {
	background: transparent;
	color: var(--color-fg);
	border-color: var(--color-border);
}
.button--ghost:hover { border-color: var(--color-fg); }

.button--link {
	padding: 0;
	border: 0;
	background: none;
	color: var(--color-accent);
	border-radius: 0;
}

/* --------------------------------------------------------------
 * 5. Forms
 * ----------------------------------------------------------- */
input[type="text"], input[type="email"], input[type="url"], input[type="search"],
input[type="password"], input[type="tel"], input[type="number"], textarea, select {
	width: 100%;
	max-width: 100%;
	padding: 0.7em 0.9em;
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	background: var(--color-bg);
	color: var(--color-fg);
	font: inherit;
}

textarea { min-height: 9rem; resize: vertical; }

label { display: block; font-size: var(--step--1); font-weight: 600; margin-bottom: var(--space-2xs); }

/* --------------------------------------------------------------
 * 6. Header & navigation
 * ----------------------------------------------------------- */
.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: color-mix(in srgb, var(--color-bg) 88%, transparent);
	backdrop-filter: saturate(180%) blur(12px);
	border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-s);
	min-height: 68px;
}

.site-branding { display: flex; align-items: baseline; flex-wrap: wrap; gap: 0.15rem var(--space-xs); }
.site-branding .custom-logo { max-height: 40px; width: auto; }

.site-title {
	margin: 0;
	font-size: var(--step-0);
	font-weight: 700;
	letter-spacing: -0.01em;
}
.site-title a { color: inherit; text-decoration: none; }

.site-description { margin: 0; font-size: var(--step--1); color: var(--color-muted); }

.nav-toggle {
	display: none;
	align-items: center;
	gap: 0.5em;
	padding: 0.55em 0.9em;
	border: 1px solid var(--color-border);
	border-radius: 999px;
	background: none;
	color: inherit;
	font: inherit;
	font-size: var(--step--1);
	cursor: pointer;
}

.nav-toggle__bars { display: block; width: 16px; height: 10px; position: relative; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
	content: "";
	position: absolute;
	left: 0; right: 0;
	height: 1.5px;
	background: currentColor;
	transition: transform var(--transition);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-4px) rotate(-45deg); }

.main-navigation ul {
	display: flex;
	align-items: center;
	gap: var(--space-s);
	margin: 0;
	padding: 0;
	list-style: none;
}

.main-navigation a {
	color: var(--color-fg);
	text-decoration: none;
	font-size: var(--step--1);
	font-weight: 550;
	padding-block: 0.4em;
	border-bottom: 1.5px solid transparent;
}
.main-navigation a:hover { border-bottom-color: var(--color-accent); }

.main-navigation .current-menu-item > a,
.main-navigation .current_page_item > a,
.main-navigation .current-menu-ancestor > a { border-bottom-color: var(--color-fg); }

/* Sub-menus */
.main-navigation li { position: relative; }
.main-navigation .sub-menu {
	position: absolute;
	top: 100%;
	left: 0;
	display: block;
	min-width: 190px;
	flex-direction: column;
	align-items: flex-start;
	gap: 0;
	padding: var(--space-2xs);
	background: var(--color-bg);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	box-shadow: 0 12px 30px rgb(0 0 0 / 0.08);
	opacity: 0;
	visibility: hidden;
	transform: translateY(6px);
	transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}
.main-navigation .sub-menu a { display: block; width: 100%; padding: 0.45em 0.6em; border: 0; border-radius: 6px; }
.main-navigation .sub-menu a:hover { background: var(--color-surface); }
.main-navigation li:hover > .sub-menu,
.main-navigation li:focus-within > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }

@media (max-width: 860px) {
	.nav-toggle { display: inline-flex; }
	.main-navigation {
		position: absolute;
		left: 0; right: 0; top: 100%;
		display: none;
		padding: var(--space-s);
		background: var(--color-bg);
		border-bottom: 1px solid var(--color-border);
	}
	.main-navigation.is-open { display: block; }
	.main-navigation ul { flex-direction: column; align-items: stretch; gap: var(--space-2xs); }
	.main-navigation a { display: block; padding: 0.6em 0; font-size: var(--step-0); border-bottom: 1px solid var(--color-border); }
	.main-navigation .sub-menu {
		position: static;
		opacity: 1;
		visibility: visible;
		transform: none;
		box-shadow: none;
		border: 0;
		padding-left: var(--space-s);
	}
}

/* --------------------------------------------------------------
 * 7. Hero
 * ----------------------------------------------------------- */
.hero { padding-block: clamp(var(--space-l), 10vw, var(--space-xl)); }
.hero__inner { display: grid; gap: var(--space-m); align-items: center; }
.hero__title { margin-bottom: var(--space-s); }
.hero__text { font-size: var(--step-1); color: var(--color-muted); max-width: 54ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin-top: var(--space-m); }
.hero__media img { border-radius: var(--radius); width: 100%; object-fit: cover; }

@media (min-width: 860px) {
	.hero__inner--has-media { grid-template-columns: 1.15fr 0.85fr; gap: var(--space-l); }
}

/* --------------------------------------------------------------
 * 8. Project grid & cards
 * ----------------------------------------------------------- */
.project-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
	gap: var(--space-m);
	margin: 0;
	padding: 0;
	list-style: none;
}

.project-card {
	display: flex;
	flex-direction: column;
	gap: var(--space-xs);
	margin: 0;
}

.project-card__media {
	position: relative;
	display: block;
	overflow: hidden;
	border-radius: var(--radius);
	background: var(--color-surface);
	aspect-ratio: 4 / 3;
}

.project-card__media img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 400ms ease;
}
.project-card:hover .project-card__media img { transform: scale(1.035); }

.project-card__media--empty::after {
	content: "";
	position: absolute;
	inset: 0;
	background: repeating-linear-gradient(45deg, transparent, transparent 12px, var(--color-border) 12px, var(--color-border) 13px);
	opacity: 0.5;
}

.project-card__title { font-size: var(--step-1); margin: 0; }
.project-card__title a { color: inherit; text-decoration: none; }
.project-card__title a:hover { color: var(--color-accent); }

.project-card__meta {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4em 0.8em;
	margin: 0;
	font-size: var(--step--1);
	color: var(--color-muted);
}

.project-card__excerpt { margin: 0; color: var(--color-muted); font-size: var(--step--1); }

/* Filters */
.project-filters {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-2xs);
	margin: 0 0 var(--space-m);
	padding: 0;
	list-style: none;
}
.project-filters a {
	display: inline-block;
	padding: 0.35em 0.9em;
	border: 1px solid var(--color-border);
	border-radius: 999px;
	color: var(--color-fg);
	font-size: var(--step--1);
	text-decoration: none;
}
.project-filters a:hover { border-color: var(--color-fg); }
.project-filters .is-active a { background: var(--color-fg); border-color: var(--color-fg); color: var(--color-bg); }

/* --------------------------------------------------------------
 * 9. Single project & posts
 * ----------------------------------------------------------- */
.entry-header { margin-bottom: var(--space-m); }
.entry-header .entry-title { margin-bottom: var(--space-xs); }

.entry-meta {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4em 1em;
	font-size: var(--step--1);
	color: var(--color-muted);
}
.entry-meta a { color: inherit; }

.entry-featured { margin-bottom: var(--space-m); }
.entry-featured img { width: 100%; border-radius: var(--radius); }

.entry-content > * { max-width: var(--container-narrow); margin-inline: auto; }
.entry-content > .alignwide { max-width: var(--container); }
.entry-content > .alignfull { max-width: none; }
.entry-content h2 { margin-top: var(--space-m); }
.entry-content h3 { margin-top: var(--space-s); }

.alignleft { float: left; margin: 0 var(--space-s) var(--space-xs) 0; }
.alignright { float: right; margin: 0 0 var(--space-xs) var(--space-s); }
.aligncenter { margin-inline: auto; }

.project-facts {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
	gap: var(--space-s);
	margin: 0 0 var(--space-m);
	padding: var(--space-s);
	background: var(--color-surface);
	border-radius: var(--radius);
}
.project-facts div { margin: 0; }
.project-facts dt {
	font-size: var(--step--1);
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--color-muted);
}
.project-facts dd { margin: 0.2em 0 0; font-weight: 550; }

.entry-footer { margin-top: var(--space-m); padding-top: var(--space-s); border-top: 1px solid var(--color-border); font-size: var(--step--1); color: var(--color-muted); }

.post-navigation {
	display: grid;
	gap: var(--space-s);
	margin-top: var(--space-l);
	padding-top: var(--space-m);
	border-top: 1px solid var(--color-border);
}
@media (min-width: 720px) { .post-navigation { grid-template-columns: 1fr 1fr; } }
.post-navigation .nav-next { text-align: right; }
.post-navigation .nav-subtitle { display: block; font-size: var(--step--1); color: var(--color-muted); }
.post-navigation a { color: inherit; text-decoration: none; font-weight: 600; }
.post-navigation a:hover { color: var(--color-accent); }

/* Post list */
.post-list { display: grid; gap: var(--space-m); }
.post-list .entry-title { font-size: var(--step-2); }
.post-list .entry-title a { color: inherit; text-decoration: none; }
.post-list .entry-title a:hover { color: var(--color-accent); }
.post-list article { padding-bottom: var(--space-m); border-bottom: 1px solid var(--color-border); }
.post-list article:last-child { border-bottom: 0; }

/* --------------------------------------------------------------
 * 10. Pagination
 * ----------------------------------------------------------- */
.pagination { margin-top: var(--space-l); }
.pagination .nav-links { display: flex; flex-wrap: wrap; gap: var(--space-2xs); }
.pagination .page-numbers {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 2.4em;
	padding: 0.45em 0.7em;
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	color: var(--color-fg);
	text-decoration: none;
	font-size: var(--step--1);
}
.pagination .page-numbers:hover { border-color: var(--color-fg); }
.pagination .page-numbers.current { background: var(--color-fg); border-color: var(--color-fg); color: var(--color-bg); }

/* --------------------------------------------------------------
 * 11. Comments
 * ----------------------------------------------------------- */
.comments-area { max-width: var(--container-narrow); margin: var(--space-l) auto 0; }
.comment-list { margin: 0 0 var(--space-m); padding: 0; list-style: none; }
.comment-list ol.children { list-style: none; margin: var(--space-s) 0 0; padding-left: var(--space-s); border-left: 1px solid var(--color-border); }
.comment-body { padding: var(--space-s) 0; border-bottom: 1px solid var(--color-border); }
.comment-meta { display: flex; align-items: center; gap: var(--space-2xs); margin-bottom: var(--space-2xs); font-size: var(--step--1); }
.comment-author img { border-radius: 50%; }
.comment-author .fn { font-style: normal; font-weight: 600; }
.comment-metadata a { color: var(--color-muted); text-decoration: none; }
.comment-form p { margin-bottom: var(--space-xs); }

/* --------------------------------------------------------------
 * 12. Footer
 * ----------------------------------------------------------- */
.site-footer {
	margin-top: var(--space-xl);
	padding-block: var(--space-l);
	background: var(--color-surface);
	border-top: 1px solid var(--color-border);
	font-size: var(--step--1);
}

.footer-widgets {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: var(--space-m);
	margin-bottom: var(--space-m);
}
.footer-widgets .widget-title { font-size: var(--step-0); margin-bottom: var(--space-xs); }
.footer-widgets ul { margin: 0; padding: 0; list-style: none; }
.footer-widgets li { margin-bottom: var(--space-2xs); }

.site-footer__bottom {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-xs);
	padding-top: var(--space-s);
	border-top: 1px solid var(--color-border);
	color: var(--color-muted);
}

.social-menu ul { display: flex; flex-wrap: wrap; gap: var(--space-s); margin: 0; padding: 0; list-style: none; }
.social-menu a { color: var(--color-fg); text-decoration: none; }
.social-menu a:hover { color: var(--color-accent); }

/* --------------------------------------------------------------
 * 13. CTA band & 404
 * ----------------------------------------------------------- */
.cta {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-s);
	padding: var(--space-m);
	background: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
}
.cta h2 { margin: 0; font-size: var(--step-2); }
.cta p { margin: var(--space-2xs) 0 0; color: var(--color-muted); }

.error-404 { text-align: center; padding-block: var(--space-xl); }
.error-404 .search-form { max-width: 420px; margin: var(--space-m) auto 0; display: flex; gap: var(--space-2xs); }

.search-form { display: flex; gap: var(--space-2xs); }
.search-form label { flex: 1; margin: 0; }

.no-results { padding: var(--space-m); background: var(--color-surface); border-radius: var(--radius); }

.entry-extra { max-width: var(--container-narrow); margin-inline: auto; }