/* =========================================================
   M Santhosh Kumar — Portfolio
   Redesign 2026 — dark-first, fluid type, bento grids
   ========================================================= */

/* ---------- Design tokens ---------- */
:root {
	--bg: #08080c;
	--bg-elevated: #111117;
	--surface: rgba(255, 255, 255, 0.045);
	--surface-strong: rgba(255, 255, 255, 0.08);
	--border: rgba(255, 255, 255, 0.10);
	--border-strong: rgba(255, 255, 255, 0.18);
	--text: #f3f3f6;
	--text-muted: #a4a4b2;
	--text-faint: #6c6c7a;

	--accent: #ff7a45;
	--accent-2: #8b5cf6;
	--accent-3: #22d3ee;
	--gradient: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 55%, var(--accent-3) 100%);
	--gradient-soft: linear-gradient(135deg, rgba(255, 122, 69, 0.18), rgba(139, 92, 246, 0.18));

	/* Darker, text-safe accent variants — used for text, icons, and thin
	   fills where the color sits directly on the page background instead
	   of inside a solid button. Dark theme just reuses the vivid accents. */
	--accent-ink: var(--accent);
	--accent-2-ink: var(--accent-2);
	--accent-3-ink: var(--accent-3);
	--gradient-ink: var(--gradient);

	--danger: #ff5d5d;
	--success: #34d399;

	--font-display: "Sora", "Inter", system-ui, sans-serif;
	--font-body: "Inter", system-ui, -apple-system, sans-serif;
	--font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

	--radius-sm: 10px;
	--radius-md: 16px;
	--radius-lg: 24px;
	--radius-pill: 999px;

	--shadow-soft: 0 20px 60px -20px rgba(0, 0, 0, 0.55);
	--shadow-glow: 0 0 0 1px rgba(255, 255, 255, 0.06), 0 20px 60px -24px rgba(255, 122, 69, 0.25);

	--container: 1160px;
	--nav-h: 76px;

	--ease: cubic-bezier(0.16, 1, 0.3, 1);
	color-scheme: dark;
}

:root[data-theme="light"] {
	--bg: #faf9f7;
	--bg-elevated: #ffffff;
	--surface: rgba(10, 10, 20, 0.035);
	--surface-strong: rgba(10, 10, 20, 0.06);
	--border: rgba(10, 10, 20, 0.09);
	--border-strong: rgba(10, 10, 20, 0.16);
	--text: #16161d;
	--text-muted: #55555f;
	--text-faint: #8a8a94;
	--shadow-soft: 0 20px 60px -24px rgba(20, 20, 30, 0.18);
	--shadow-glow: 0 0 0 1px rgba(10, 10, 20, 0.05), 0 20px 60px -28px rgba(255, 122, 69, 0.25);
	--accent-ink: #c2410c;
	--accent-2-ink: #7c3aed;
	--accent-3-ink: #0e7490;
	--gradient-ink: linear-gradient(135deg, var(--accent-ink) 0%, var(--accent-2-ink) 55%, var(--accent-3-ink) 100%);
	color-scheme: light;
}

@media (prefers-color-scheme: light) {
	:root:not([data-theme="dark"]) {
		--bg: #faf9f7;
		--bg-elevated: #ffffff;
		--surface: rgba(10, 10, 20, 0.035);
		--surface-strong: rgba(10, 10, 20, 0.06);
		--border: rgba(10, 10, 20, 0.09);
		--border-strong: rgba(10, 10, 20, 0.16);
		--text: #16161d;
		--text-muted: #55555f;
		--text-faint: #8a8a94;
		--shadow-soft: 0 20px 60px -24px rgba(20, 20, 30, 0.18);
		--shadow-glow: 0 0 0 1px rgba(10, 10, 20, 0.05), 0 20px 60px -28px rgba(255, 122, 69, 0.25);
		--accent-ink: #c2410c;
		--accent-2-ink: #7c3aed;
		--accent-3-ink: #0e7490;
		--gradient-ink: linear-gradient(135deg, var(--accent-ink) 0%, var(--accent-2-ink) 55%, var(--accent-3-ink) 100%);
		color-scheme: light;
	}
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }

body {
	background: var(--bg);
	color: var(--text);
	font-family: var(--font-body);
	font-size: 16px;
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
	transition: background-color .3s var(--ease), color .3s var(--ease);
	overflow-x: hidden;
}

::selection { background: var(--accent); color: #0a0a0a; }

.container {
	width: 100%;
	max-width: var(--container);
	margin-inline: auto;
	padding-inline: 24px;
}

.skip-link {
	position: absolute;
	left: -999px;
	top: 0;
	background: var(--accent);
	color: #0a0a0a;
	padding: 12px 18px;
	border-radius: var(--radius-sm);
	z-index: 999;
	font-weight: 600;
}
.skip-link:focus { left: 16px; top: 16px; }

:focus-visible {
	outline: 2px solid var(--accent-3-ink);
	outline-offset: 3px;
	border-radius: 4px;
}

@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;
	}
}

/* ---------- Background texture ---------- */
.bg-orbs {
	position: fixed;
	inset: 0;
	z-index: -1;
	overflow: hidden;
	pointer-events: none;
}
.bg-orbs::before, .bg-orbs::after {
	content: "";
	position: absolute;
	width: 46vw;
	height: 46vw;
	border-radius: 50%;
	filter: blur(110px);
	opacity: .35;
}
.bg-orbs::before {
	top: -12vw;
	right: -10vw;
	background: radial-gradient(circle, var(--accent), transparent 70%);
}
.bg-orbs::after {
	bottom: -16vw;
	left: -12vw;
	background: radial-gradient(circle, var(--accent-2), transparent 70%);
}
:root[data-theme="light"] .bg-orbs::before,
:root[data-theme="light"] .bg-orbs::after { opacity: .18; }

#bg-network {
	position: fixed;
	inset: 0;
	z-index: -1;
	pointer-events: none;
	opacity: 0.6;
}

/* ---------- Buttons & chips ---------- */
.btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 13px 24px;
	border-radius: var(--radius-pill);
	font-weight: 600;
	font-size: 0.95rem;
	transition: transform .25s var(--ease), box-shadow .25s var(--ease), background-color .25s var(--ease), border-color .25s var(--ease);
	white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
	background: var(--gradient);
	color: #0a0a0a;
	box-shadow: var(--shadow-glow);
}
.btn-ghost {
	background: var(--surface);
	border: 1px solid var(--border);
	color: var(--text);
}
.btn-ghost:hover { border-color: var(--border-strong); background: var(--surface-strong); }
.btn svg { width: 18px; height: 18px; }

.chip {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: 7px 14px;
	border-radius: var(--radius-pill);
	border: 1px solid var(--border);
	background: var(--surface);
	font-size: 0.82rem;
	color: var(--text-muted);
	font-family: var(--font-mono);
}

.eyebrow {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	font-family: var(--font-mono);
	font-size: 0.8rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--accent-ink);
	margin-bottom: 14px;
}
.eyebrow::before {
	content: "";
	width: 24px;
	height: 1px;
	background: var(--accent-ink);
}

.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head h2 {
	font-family: var(--font-display);
	font-size: clamp(1.8rem, 3.2vw, 2.6rem);
	font-weight: 700;
	letter-spacing: -0.02em;
}
.section-head p { color: var(--text-muted); margin-top: 14px; font-size: 1.02rem; }

section { padding: 108px 0; position: relative; }
@media (max-width: 720px) { section { padding: 76px 0; } }

/* ---------- Scroll progress ---------- */
.scroll-progress {
	position: fixed;
	top: 0;
	left: 0;
	height: 2px;
	width: 0%;
	background: var(--gradient-ink);
	z-index: 101;
	transition: width .1s linear;
}

/* ---------- Header / nav ---------- */
.site-header {
	position: fixed;
	inset-inline: 0;
	top: 0;
	z-index: 100;
	height: var(--nav-h);
	display: flex;
	align-items: center;
	transition: background-color .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
	border-bottom: 1px solid transparent;
}
.site-header.scrolled {
	background: color-mix(in srgb, var(--bg) 78%, transparent);
	backdrop-filter: blur(16px) saturate(140%);
	-webkit-backdrop-filter: blur(16px) saturate(140%);
	border-bottom-color: var(--border);
}
.site-header .container {
	display: flex;
	align-items: center;
	justify-content: space-between;
}
.brand {
	font-family: var(--font-display);
	font-weight: 700;
	font-size: 1.15rem;
	display: flex;
	align-items: center;
	gap: 10px;
}
.brand .mark {
	width: 34px;
	height: 34px;
	border-radius: 10px;
	background: var(--gradient);
	color: #0a0a0a;
	display: grid;
	place-items: center;
	font-size: 0.95rem;
	font-weight: 800;
}

.nav-links {
	display: flex;
	align-items: center;
	gap: 4px;
}
.nav-links a {
	padding: 9px 16px;
	border-radius: var(--radius-pill);
	font-size: 0.92rem;
	font-weight: 500;
	color: var(--text-muted);
	transition: color .2s, background-color .2s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); background: var(--surface); }

.nav-actions { display: flex; align-items: center; gap: 8px; }

.icon-btn {
	width: 40px;
	height: 40px;
	border-radius: 50%;
	display: grid;
	place-items: center;
	border: 1px solid var(--border);
	background: var(--surface);
	color: var(--text);
	transition: background-color .2s, border-color .2s, transform .2s;
}
.icon-btn:hover { border-color: var(--border-strong); transform: translateY(-1px); }
.icon-btn svg { width: 18px; height: 18px; }

.theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }

.nav-toggle { display: none; }
.nav-toggle .icon-menu-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu-close { display: block; }

.mobile-nav { display: none; }

@media (max-width: 860px) {
	.nav-links { display: none; }
	.nav-toggle { display: grid; }

	.mobile-nav {
		position: fixed;
		inset: var(--nav-h) 16px auto 16px;
		background: var(--bg-elevated);
		border: 1px solid var(--border);
		border-radius: var(--radius-md);
		box-shadow: var(--shadow-soft);
		padding: 10px;
		flex-direction: column;
		z-index: 99;
	}
	.mobile-nav.open { display: flex; }
	.mobile-nav a {
		padding: 14px 16px;
		border-radius: var(--radius-sm);
		font-weight: 500;
		color: var(--text-muted);
	}
	.mobile-nav a:hover { background: var(--surface); color: var(--text); }

	.mobile-nav-backdrop {
		position: fixed;
		inset: 0;
		background: rgba(0, 0, 0, 0.45);
		backdrop-filter: blur(2px);
		z-index: 98;
		opacity: 0;
		visibility: hidden;
		transition: opacity .25s var(--ease), visibility .25s var(--ease);
	}
	.mobile-nav-backdrop.open { opacity: 1; visibility: visible; }
}
@media (min-width: 861px) {
	.mobile-nav-backdrop { display: none; }
}

/* ---------- Hero ---------- */
.hero {
	min-height: 100svh;
	display: flex;
	align-items: center;
	padding-top: var(--nav-h);
}
.hero-inner { max-width: 780px; }
.hero-avatar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 26px; }
.status-dot {
	width: 8px; height: 8px; border-radius: 50%;
	background: var(--success);
	box-shadow: 0 0 0 4px color-mix(in srgb, var(--success) 20%, transparent);
}
.hero p.kicker {
	font-family: var(--font-mono);
	color: var(--text-muted);
	font-size: 0.95rem;
}
.hero h1 {
	font-family: var(--font-display);
	font-weight: 700;
	font-size: clamp(2.6rem, 7vw, 5rem);
	line-height: 1.04;
	letter-spacing: -0.03em;
	margin-top: 8px;
}
.hero h1 .grad {
	background: var(--gradient-ink);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
}
.hero .role-line {
	margin-top: 20px;
	font-size: clamp(1.15rem, 2.4vw, 1.5rem);
	color: var(--text-muted);
	min-height: 1.6em;
	font-family: var(--font-mono);
}
.role-rotate { color: var(--text); font-weight: 600; }
.role-rotate::after {
	content: "";
	display: inline-block;
	width: 2px;
	height: 1.05em;
	background: var(--accent-ink);
	margin-left: 3px;
	vertical-align: -0.15em;
	animation: caret 1s steps(1) infinite;
}
@keyframes caret { 50% { opacity: 0; } }

.hero .lede {
	margin-top: 26px;
	font-size: 1.08rem;
	color: var(--text-muted);
	max-width: 58ch;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }
.hero-social { display: flex; gap: 10px; margin-top: 44px; }

.scroll-cue {
	position: absolute;
	bottom: 36px;
	left: 50%;
	transform: translateX(-50%);
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 8px;
	color: var(--text-faint);
	font-family: var(--font-mono);
	font-size: 0.75rem;
	letter-spacing: 0.08em;
}
.scroll-cue .line { width: 1px; height: 34px; background: linear-gradient(var(--text-faint), transparent); animation: scrollcue 1.8s var(--ease) infinite; }
@keyframes scrollcue { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ---------- About ---------- */
.about-grid {
	display: grid;
	grid-template-columns: 1.2fr 0.8fr;
	gap: 32px;
	align-items: start;
}
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; } }

.about-bio p { color: var(--text-muted); font-size: 1.04rem; margin-bottom: 18px; }
.about-facts {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 12px;
	margin-top: 28px;
}
.fact {
	border: 1px solid var(--border);
	background: var(--surface);
	border-radius: var(--radius-md);
	padding: 16px 18px;
}
.fact .label { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: .06em; }
.fact .value { font-weight: 600; margin-top: 4px; font-size: 0.98rem; }

.about-card {
	border: 1px solid var(--border);
	background: linear-gradient(160deg, var(--surface), transparent);
	border-radius: var(--radius-lg);
	padding: 32px;
	box-shadow: var(--shadow-soft);
}
.stat-row { display: flex; align-items: baseline; gap: 10px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.stat-row:last-child { border-bottom: 0; }
.stat-row .num {
	font-family: var(--font-display);
	font-size: 2.1rem;
	font-weight: 700;
	background: var(--gradient-ink);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
}
.stat-row .label { color: var(--text-muted); font-size: 0.92rem; }

/* ---------- Timeline (experience / education) ---------- */
.timeline { position: relative; padding-left: 32px; }
.timeline::before {
	content: "";
	position: absolute;
	left: 5px;
	top: 6px;
	bottom: 6px;
	width: 1px;
	background: linear-gradient(var(--border-strong), transparent);
}
.timeline-item { position: relative; padding-bottom: 44px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
	content: "";
	position: absolute;
	left: -32px;
	top: 4px;
	width: 11px;
	height: 11px;
	border-radius: 50%;
	background: var(--bg);
	border: 2px solid var(--accent-ink);
}
.timeline-item.current::before {
	background: var(--accent-ink);
	box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent-ink) 22%, transparent);
}
.timeline-date {
	font-family: var(--font-mono);
	font-size: 0.82rem;
	color: var(--accent-ink);
	display: inline-flex;
	align-items: center;
	gap: 8px;
}
.badge-current {
	font-family: var(--font-mono);
	font-size: 0.68rem;
	padding: 2px 8px;
	border-radius: var(--radius-pill);
	background: color-mix(in srgb, var(--success) 18%, transparent);
	color: var(--success);
	text-transform: uppercase;
	letter-spacing: .05em;
}
.timeline-item h3 {
	font-family: var(--font-display);
	font-size: 1.2rem;
	margin-top: 6px;
	font-weight: 600;
}
.org-badge {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 22px;
	height: 22px;
	border-radius: 6px;
	background: var(--gradient-soft);
	color: var(--accent-ink);
	font-family: var(--font-mono);
	font-size: 0.62rem;
	font-weight: 700;
	margin-right: 8px;
	vertical-align: middle;
}
.timeline-item .org { color: var(--text-muted); font-size: 0.94rem; }
.timeline-item .org a { color: var(--accent-3-ink); }
.timeline-item .org a:hover { text-decoration: underline; }
.timeline-item ul { margin-top: 12px; display: grid; gap: 6px; }
.timeline-item li {
	color: var(--text-muted);
	font-size: 0.95rem;
	padding-left: 18px;
	position: relative;
}
.timeline-item li::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0.65em;
	width: 6px;
	height: 1px;
	background: var(--text-faint);
}
.timeline-item p.desc { margin-top: 10px; color: var(--text-muted); font-size: 0.95rem; max-width: 68ch; }

.resume-layout {
	display: grid;
	grid-template-columns: 200px 1fr;
	gap: 40px;
	align-items: start;
}
.resume-tabs {
	display: flex;
	flex-direction: column;
	gap: 4px;
	position: sticky;
	top: calc(var(--nav-h) + 24px);
}
.resume-tabs button {
	position: relative;
	text-align: left;
	padding: 12px 16px 12px 20px;
	border-radius: var(--radius-md);
	border: 1px solid transparent;
	background: transparent;
	color: var(--text-muted);
	font-weight: 500;
	font-size: 0.92rem;
	transition: all .2s;
}
.resume-tabs button:hover { color: var(--text); background: var(--surface); }
.resume-tabs button.active { color: var(--text); background: var(--surface-strong); border-color: var(--border); }
.resume-tabs button.active::before {
	content: "";
	position: absolute;
	left: 0;
	top: 8px;
	bottom: 8px;
	width: 3px;
	border-radius: 2px;
	background: var(--gradient-ink);
}
.resume-panel { display: none; }
.resume-panel.active { display: block; animation: fadeIn .4s var(--ease); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

@media (max-width: 860px) {
	.resume-layout { grid-template-columns: 1fr; gap: 24px; }
	.resume-tabs {
		flex-direction: row;
		overflow-x: auto;
		position: static;
		gap: 8px;
		padding-bottom: 6px;
		scrollbar-width: none;
	}
	.resume-tabs::-webkit-scrollbar { display: none; }
	.resume-tabs button { flex: 0 0 auto; padding: 10px 18px; border-radius: var(--radius-pill); }
	.resume-tabs button.active { background: var(--gradient); color: #0a0a0a; border-color: transparent; }
	.resume-tabs button.active::before { display: none; }
}

/* ---------- Skills bento ---------- */
.skills-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 18px;
}
@media (max-width: 960px) { .skills-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .skills-grid { grid-template-columns: 1fr; } }

.skill-card {
	grid-column: span 2;
	border: 1px solid var(--border);
	background: var(--surface);
	border-radius: var(--radius-lg);
	padding: 26px;
	transition: border-color .25s, transform .25s, background-color .25s;
}
.skill-card:hover { border-color: var(--border-strong); transform: translateY(-3px); background: var(--surface-strong); }
.skill-card .icon-wrap {
	width: 44px; height: 44px;
	border-radius: 12px;
	display: grid; place-items: center;
	background: var(--gradient-soft);
	color: var(--accent-ink);
	margin-bottom: 16px;
}
.skill-card .icon-wrap svg { width: 22px; height: 22px; }
.skill-card h3 { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.skill-card p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------- Projects / open source ---------- */
.project-controls {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 16px;
	margin-bottom: 32px;
}
.project-filters { display: flex; gap: 8px; flex-wrap: wrap; }
.project-filters button {
	padding: 9px 16px;
	border-radius: var(--radius-pill);
	border: 1px solid var(--border);
	background: var(--surface);
	font-size: 0.86rem;
	color: var(--text-muted);
	font-family: var(--font-mono);
	transition: all .2s;
}
.project-filters button.active { background: var(--gradient); color: #0a0a0a; border-color: transparent; }

.project-search {
	display: flex;
	align-items: center;
	gap: 8px;
	padding: 9px 16px;
	border-radius: var(--radius-pill);
	border: 1px solid var(--border);
	background: var(--surface);
	color: var(--text-faint);
	flex: 0 1 240px;
	transition: border-color .2s;
}
.project-search:focus-within { border-color: var(--border-strong); color: var(--text-muted); }
.project-search svg { width: 16px; height: 16px; flex-shrink: 0; }
.project-search input {
	border: 0;
	background: none;
	outline: none;
	width: 100%;
	font-size: 0.86rem;
	color: var(--text);
}
.project-search input::placeholder { color: var(--text-faint); }

.project-empty {
	text-align: center;
	color: var(--text-faint);
	font-size: 0.95rem;
	padding: 40px 0;
}

.project-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 20px;
}
@media (max-width: 960px) { .project-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .project-grid { grid-template-columns: 1fr; } }

.project-card {
	border: 1px solid var(--border);
	background: var(--surface);
	border-radius: var(--radius-lg);
	padding: 24px;
	display: flex;
	flex-direction: column;
	transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
	position: relative;
	overflow: hidden;
}
.project-card:hover {
	transform: translateY(-4px);
	border-color: var(--border-strong);
	box-shadow: var(--shadow-soft);
}
.project-card.hidden { display: none; }
.project-top { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 18px; }
.project-platform {
	width: 38px; height: 38px;
	border-radius: 10px;
	display: grid; place-items: center;
	background: var(--gradient-soft);
	color: var(--accent-ink);
}
.project-platform svg { width: 20px; height: 20px; }
.project-card h3 { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.project-card p { color: var(--text-muted); font-size: 0.9rem; flex: 1; }
.project-badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.project-badges img { display: block; border-radius: 4px; height: 20px; }
.project-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--border); }
.project-meta .date { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-faint); }
.project-meta .link { display: inline-flex; align-items: center; gap: 6px; font-size: 0.85rem; font-weight: 600; color: var(--accent-3-ink); }
.project-meta .link svg { width: 14px; height: 14px; }

/* ---------- Awards / Publications ---------- */
.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 760px) { .card-grid { grid-template-columns: 1fr; } }
.info-card {
	border: 1px solid var(--border);
	background: var(--surface);
	border-radius: var(--radius-lg);
	padding: 26px;
}
.info-card .date { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent-ink); }
.info-card h3 { font-family: var(--font-display); font-size: 1.05rem; margin: 8px 0 4px; font-weight: 600; }
.info-card .sub { color: var(--text-muted); font-size: 0.88rem; }
.info-card .sub a { color: var(--accent-3-ink); }
.info-card .sub a:hover { text-decoration: underline; }
.info-card p { color: var(--text-muted); font-size: 0.92rem; margin-top: 12px; }

/* ---------- Contact ---------- */
.contact-card {
	border: 1px solid var(--border);
	background: linear-gradient(160deg, var(--surface), transparent);
	border-radius: var(--radius-lg);
	padding: 56px;
	text-align: center;
	box-shadow: var(--shadow-soft);
}
.contact-card h2 {
	font-family: var(--font-display);
	font-size: clamp(1.8rem, 4vw, 2.6rem);
	font-weight: 700;
	letter-spacing: -0.02em;
	max-width: 20ch;
	margin-inline: auto;
}
.contact-card p { color: var(--text-muted); margin-top: 16px; font-size: 1.02rem; }
.contact-actions { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.copy-email-btn.copied { border-color: var(--success); color: var(--success); }
.contact-social { display: flex; justify-content: center; gap: 10px; margin-top: 36px; }
@media (max-width: 640px) { .contact-card { padding: 36px 22px; } }

/* ---------- Footer ---------- */
.site-footer {
	position: relative;
	border-top: 1px solid var(--border);
	padding: 28px 0;
	overflow: hidden;
}
.site-footer::before {
	content: "";
	position: absolute;
	inset: 0 0 auto 0;
	height: 1px;
	background: var(--gradient-ink);
	opacity: .6;
}
.footer-bottom {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 12px;
	color: var(--text-faint);
	font-size: 0.85rem;
}
.footer-bottom .brand { font-size: 0.95rem; }
.footer-bottom .brand .mark { width: 26px; height: 26px; border-radius: 8px; font-size: 0.75rem; }
@media (max-width: 640px) {
	.footer-bottom { justify-content: center; text-align: center; }
}
.back-to-top {
	position: fixed;
	right: 24px;
	bottom: 24px;
	z-index: 90;
	opacity: 0;
	visibility: hidden;
	transform: translateY(10px);
	transition: opacity .25s, transform .25s, visibility .25s;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: none; }

/* ---------- Command palette ---------- */
.cmdk-overlay {
	position: fixed;
	inset: 0;
	z-index: 200;
	background: rgba(4, 4, 8, 0.55);
	backdrop-filter: blur(4px);
	display: flex;
	align-items: flex-start;
	justify-content: center;
	padding: 14vh 20px 20px;
}
.cmdk-overlay[hidden] { display: none; }
.cmdk-panel {
	width: 100%;
	max-width: 560px;
	background: var(--bg-elevated);
	border: 1px solid var(--border-strong);
	border-radius: var(--radius-lg);
	box-shadow: var(--shadow-soft);
	overflow: hidden;
	animation: cmdkIn .18s var(--ease);
}
@keyframes cmdkIn { from { opacity: 0; transform: translateY(-8px) scale(.98); } to { opacity: 1; transform: none; } }
.cmdk-input-row {
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 16px 18px;
	border-bottom: 1px solid var(--border);
	color: var(--text-faint);
}
.cmdk-input-row svg { width: 18px; height: 18px; flex-shrink: 0; }
.cmdk-input {
	flex: 1;
	background: none;
	border: 0;
	outline: 0;
	color: var(--text);
	font-size: 0.98rem;
	font-family: var(--font-body);
}
.cmdk-input::placeholder { color: var(--text-faint); }
.cmdk-input-row kbd {
	font-family: var(--font-mono);
	font-size: 0.7rem;
	border: 1px solid var(--border);
	border-radius: 6px;
	padding: 2px 6px;
	color: var(--text-faint);
}
.cmdk-list { list-style: none; margin: 0; padding: 8px; max-height: 360px; overflow-y: auto; }
.cmdk-list li {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 10px;
	padding: 11px 12px;
	border-radius: var(--radius-sm);
	color: var(--text-muted);
	cursor: pointer;
	font-size: 0.92rem;
}
.cmdk-list li .cmdk-item-main { display: flex; align-items: center; gap: 10px; }
.cmdk-list li svg { width: 16px; height: 16px; opacity: .7; }
.cmdk-list li .cmdk-hint { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-faint); }
.cmdk-list li.active, .cmdk-list li:hover { background: var(--surface-strong); color: var(--text); }
.cmdk-list li.empty { color: var(--text-faint); justify-content: center; cursor: default; }
.cmdk-list li.empty:hover { background: none; }

/* ---------- Toast ---------- */
.toast {
	position: fixed;
	bottom: 28px;
	left: 50%;
	transform: translate(-50%, 12px);
	background: var(--bg-elevated);
	border: 1px solid var(--border-strong);
	box-shadow: var(--shadow-soft);
	padding: 12px 20px;
	border-radius: var(--radius-pill);
	font-size: 0.88rem;
	color: var(--text);
	opacity: 0;
	visibility: hidden;
	z-index: 300;
	transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
	display: flex;
	align-items: center;
	gap: 8px;
}
.toast.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in-view { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
	.reveal { opacity: 1; transform: none; }
}

/* ---------- Loader ---------- */
#page-loader {
	position: fixed;
	inset: 0;
	z-index: 1000;
	background: var(--bg);
	display: flex;
	align-items: center;
	justify-content: center;
	transition: opacity .5s var(--ease), visibility .5s var(--ease);
}
#page-loader.hidden { opacity: 0; visibility: hidden; }
.loader-mark {
	width: 44px; height: 44px;
	border-radius: 12px;
	background: var(--gradient);
	animation: pulse 1.1s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(0.85); opacity: .6; } }