/* ---------- Design tokens ---------- */
:root {
	--bg: 250 250 247;
	--surface: 255 255 255;
	--fg: 23 26 31;
	--muted: 107 114 128;
	--border: 229 231 235;
	--accent: 51 65 85;       /* slate-700, used sparingly for CTAs/links */
	--accent-soft: 241 245 249; /* slate-100, tinted backgrounds */
	--accent-fg: 255 255 255;

	--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
	--container: 760px;
}

* { box-sizing: border-box; }

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

body {
	margin: 0;
	background: rgb(var(--bg));
	color: rgb(var(--fg));
	font-family: var(--font-sans);
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
}

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

.muted { color: rgb(var(--muted)); }

/* ---------- Nav ---------- */
.site-nav {
	position: sticky;
	top: 0;
	z-index: 50;
	background: rgb(var(--bg) / 0.85);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid rgb(var(--border));
}

.site-nav__inner {
	max-width: var(--container);
	margin: 0 auto;
	padding: 1rem 0.75rem;
	display: flex;
	align-items: center;
	gap: 1.5rem;
}

.site-nav__logo {
	font-weight: 600;
	margin-right: auto;
}

.site-nav__links {
	display: flex;
	gap: 1.25rem;
	font-size: 0.9rem;
}

.site-nav__links a:hover { color: rgb(var(--accent)); }

@media (max-width: 640px) {
	.site-nav__links { display: none; }
}

/* ---------- Buttons ---------- */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 0.65rem 1.25rem;
	border-radius: 8px;
	font-size: 0.9rem;
	font-weight: 500;
	border: 1px solid transparent;
	transition: opacity 0.15s ease, background-color 0.15s ease;
}

.btn--sm { padding: 0.45rem 0.9rem; font-size: 0.85rem; }

.btn--primary {
	background: rgb(var(--accent));
	color: rgb(var(--accent-fg));
}

.btn--primary:hover { opacity: 0.88; }

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

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

/* ---------- Hero ---------- */
.hero {
	max-width: var(--container);
	margin: 0 auto;
	padding: 4.5rem 0.75rem 3.5rem;
}

.badge {
	display: inline-block;
	font-size: 0.8rem;
	color: rgb(var(--muted));
	background: rgb(var(--accent-soft));
	border: 1px solid rgb(var(--border));
	border-radius: 999px;
	padding: 0.3rem 0.75rem;
	margin-bottom: 1.5rem;
}

.hero h1 {
	font-size: clamp(2rem, 5vw, 3rem);
	line-height: 1.15;
	margin: 0 0 1rem;
	font-weight: 600;
	letter-spacing: -0.02em;
}

.hero__bio {
	max-width: 56ch;
	color: rgb(var(--muted));
	font-size: 1.05rem;
	margin: 0 0 2.5rem;
}

.hero__metrics {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 1rem;
	border-top: 1px solid rgb(var(--border));
	border-bottom: 1px solid rgb(var(--border));
	padding: 1.5rem 0;
	margin-bottom: 2rem;
}

.metric { display: flex; flex-direction: column; gap: 0.2rem; }
.metric strong { font-size: 1.4rem; }
.metric span { font-size: 0.8rem; color: rgb(var(--muted)); }

@media (max-width: 640px) {
	.hero__metrics { grid-template-columns: repeat(2, 1fr); }
}

.hero__cta { display: flex; gap: 0.75rem; margin-bottom: 2rem; flex-wrap: wrap; }

.hero__social { display: flex; gap: 1.25rem; font-size: 0.85rem; }
.hero__social a { color: rgb(var(--muted)); }
.hero__social a:hover { color: rgb(var(--accent)); }

/* ---------- Sections ---------- */
.section {
	max-width: var(--container);
	margin: 0 auto;
	padding: 3rem 0.75rem;
	border-top: 1px solid rgb(var(--border));
}

.section h2 {
	display: flex;
	align-items: baseline;
	gap: 0.75rem;
	font-size: 1.4rem;
	margin: 0 0 1.5rem;
}

.section__num {
	font-size: 0.85rem;
	color: rgb(var(--muted));
	font-variant-numeric: tabular-nums;
}

.section__body p { margin: 0 0 1rem; }

blockquote {
	margin: 1.5rem 0 0;
	padding: 1rem 1.25rem;
	border-left: 3px solid rgb(var(--accent));
	background: rgb(var(--accent-soft));
	font-style: italic;
	border-radius: 0 8px 8px 0;
}

/* ---------- Timeline ---------- */
.timeline { display: flex; flex-direction: column; gap: 2rem; }

.timeline__item { display: grid; grid-template-columns: 220px 1fr; gap: 1.5rem; }

.timeline__meta h3 { margin: 0 0 0.25rem; font-size: 1.05rem; }
.timeline__meta span { font-size: 0.85rem; }

.timeline__item ul { margin: 0; padding-left: 1.1rem; }
.timeline__item li { margin-bottom: 0.4rem; }

@media (max-width: 640px) {
	.timeline__item { grid-template-columns: 1fr; gap: 0.5rem; }
}

/* ---------- Cards ---------- */
.card-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
	gap: 1rem;
}

.card {
	display: block;
	background: rgb(var(--surface));
	border: 1px solid rgb(var(--border));
	border-radius: 12px;
	padding: 1.25rem;
	transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover { border-color: rgb(var(--accent)); transform: translateY(-2px); }

.card__tag {
	display: inline-block;
	font-size: 0.7rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: rgb(var(--muted));
	margin-bottom: 0.5rem;
}

.card h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.card p { margin: 0; font-size: 0.9rem; color: rgb(var(--muted)); }

/* ---------- Skills ---------- */
.skills-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
	gap: 1.5rem;
}

.skills-group h3 { margin: 0 0 0.4rem; font-size: 0.95rem; }
.skills-group p { margin: 0; font-size: 0.9rem; color: rgb(var(--muted)); }

/* ---------- Footer ---------- */
.site-footer {
	max-width: var(--container);
	margin: 0 auto;
	padding: 2rem 0.75rem 3rem;
	font-size: 0.8rem;
	color: rgb(var(--muted));
}