/* ==========================================================================
   Riyas A C: portfolio styles
   1. Tokens          5. Hero           9. Skills
   2. Base            6. Sections      10. Education
   3. Buttons         7. Impact        11. Contact & footer
   4. Navigation      8. Experience &  12. Motion
                         projects
   ========================================================================== */

/* 1. Tokens
   -------------------------------------------------------------------------- */
:root {
	--color-primary: #13203a;      /* deep ink navy */
	--color-primary-deep: #0d1729;
	--color-secondary: #9cb8a2;    /* light sage, decorative and on-dark text */
	--color-accent: #3b6a4e;       /* sage, text-safe on light backgrounds */
	--color-accent-tint: #eaf0eb;
	--color-bg: #f6f5f0;           /* soft off-white */
	--color-surface: #ffffff;
	--color-text: #1a2332;
	--color-muted: #566070;
	--color-border: #e2e0d7;
	--color-on-dark: #ffffff;
	--color-on-dark-muted: #a9b4c4;
	--color-on-dark-border: rgba(255, 255, 255, 0.14);
	--color-on-primary: #ffffff;   /* text on primary-filled buttons and chips */
	--color-ink-bg: #13203a;       /* backgrounds that stay dark in both themes */
	--color-portrait-bg: #13203a;
	--color-header-bg: rgba(246, 245, 240, 0.94);
	--color-dot: rgba(19, 32, 58, 0.09);
	--color-card-hover-border: #cfd6cf;

	--font-sans: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
	--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

	--radius: 8px;
	--header-height: 72px;
	--section-space: clamp(4.5rem, 8vw, 7rem);
	--ease: cubic-bezier(0.2, 0.7, 0.2, 1);

	/* Bootstrap hooks */
	--bs-body-font-family: var(--font-sans);
	--bs-body-color: var(--color-text);
	--bs-body-bg: var(--color-bg);
	--bs-link-color-rgb: 59, 106, 78;
	--bs-link-hover-color-rgb: 19, 32, 58;
	color-scheme: light;
}

/* Dark theme: set on <html> by the inline script in <head> */
:root[data-theme="dark"] {
	--color-primary: #eef2f7;      /* headings and primary actions turn light */
	--color-primary-deep: #070c16;
	--color-accent: #8fb79a;
	--color-accent-tint: #263647;
	--color-bg: #0e1626;
	--color-surface: #152139;
	--color-text: #dfe5ee;
	--color-muted: #9aa6b8;
	--color-border: #26344d;
	--color-on-primary: #0e1626;
	--color-ink-bg: #0a111d;
	--color-portrait-bg: #1c2d4b;
	--color-header-bg: rgba(14, 22, 38, 0.92);
	--color-dot: rgba(255, 255, 255, 0.07);
	--color-card-hover-border: #3a4d70;
	--bs-link-color-rgb: 143, 183, 154;
	--bs-link-hover-color-rgb: 238, 242, 247;
	color-scheme: dark;
}

:root[data-theme="dark"] .section-ink {
	border-block: 1px solid var(--color-border);
}

/* Short colour cross-fade while switching themes */
.theme-switching,
.theme-switching *,
.theme-switching *::before,
.theme-switching *::after {
	transition: background-color 0.35s ease, color 0.35s ease, border-color 0.35s ease, fill 0.35s ease !important;
}

/* 2. Base
   -------------------------------------------------------------------------- */
html {
	scroll-padding-top: var(--header-height);
}

body {
	font-family: var(--font-sans);
	font-size: 1rem;
	line-height: 1.65;
	color: var(--color-text);
	background: var(--color-bg);
	overflow-x: hidden;
	-webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
	color: var(--color-primary);
	font-weight: 700;
	letter-spacing: -0.02em;
	line-height: 1.15;
}

img {
	max-width: 100%;
	height: auto;
}

ul, ol {
	margin: 0;
	padding: 0;
	list-style: none;
}

p:last-child {
	margin-bottom: 0;
}

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

.section-ink :focus-visible,
.site-footer :focus-visible {
	outline-color: var(--color-secondary);
}

.skip-link {
	position: absolute;
	top: -100px;
	left: 1rem;
	z-index: 2000;
	padding: 0.75rem 1rem;
	background: var(--color-primary);
	color: var(--color-on-primary);
	font-weight: 600;
	border-radius: var(--radius);
}

.skip-link:focus {
	top: 1rem;
}

/* 3. Buttons
   -------------------------------------------------------------------------- */
.btn {
	--bs-btn-padding-x: 1.35rem;
	--bs-btn-padding-y: 0.7rem;
	--bs-btn-font-weight: 600;
	--bs-btn-border-radius: 6px;
	--bs-btn-focus-box-shadow: none;
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	min-height: 44px;
	transition: background-color 0.2s, color 0.2s, border-color 0.2s, transform 0.2s var(--ease);
}

.btn:active {
	transform: translateY(1px);
}

.btn .bi-arrow-right,
.btn .bi-download,
.btn .bi-file-earmark-arrow-down {
	transition: transform 0.25s var(--ease);
}

.btn:hover .bi-arrow-right {
	transform: translateX(4px);
}

.btn:hover .bi-download,
.btn:hover .bi-file-earmark-arrow-down {
	transform: translateY(2px);
}

.btn-sage {
	--bs-btn-color: var(--color-ink-bg);
	--bs-btn-bg: var(--color-secondary);
	--bs-btn-border-color: var(--color-secondary);
	--bs-btn-hover-color: var(--color-ink-bg);
	--bs-btn-hover-bg: var(--color-on-dark);
	--bs-btn-hover-border-color: var(--color-on-dark);
	--bs-btn-active-color: var(--color-ink-bg);
	--bs-btn-active-bg: var(--color-on-dark);
	--bs-btn-active-border-color: var(--color-on-dark);
}

.btn-sm {
	--bs-btn-padding-x: 0.9rem;
	--bs-btn-padding-y: 0.4rem;
	--bs-btn-font-size: 0.875rem;
	min-height: 38px;
}

.btn-ink {
	--bs-btn-color: var(--color-on-primary);
	--bs-btn-bg: var(--color-primary);
	--bs-btn-border-color: var(--color-primary);
	--bs-btn-hover-color: var(--color-on-primary);
	--bs-btn-hover-bg: var(--color-accent);
	--bs-btn-hover-border-color: var(--color-accent);
	--bs-btn-active-color: var(--color-on-primary);
	--bs-btn-active-bg: var(--color-accent);
	--bs-btn-active-border-color: var(--color-accent);
}

.btn-outline-ink {
	--bs-btn-color: var(--color-primary);
	--bs-btn-border-color: var(--color-primary);
	--bs-btn-hover-color: var(--color-on-primary);
	--bs-btn-hover-bg: var(--color-primary);
	--bs-btn-hover-border-color: var(--color-primary);
	--bs-btn-active-color: var(--color-on-primary);
	--bs-btn-active-bg: var(--color-primary);
	--bs-btn-active-border-color: var(--color-primary);
}

.btn-link-ink {
	--bs-btn-color: var(--color-accent);
	--bs-btn-hover-color: var(--color-primary);
	--bs-btn-active-color: var(--color-primary);
	--bs-btn-padding-x: 0.5rem;
	text-decoration: underline;
	text-underline-offset: 4px;
}

/* 4. Navigation
   -------------------------------------------------------------------------- */
.site-header {
	position: fixed;
	inset: 0 0 auto;
	z-index: 1030;
	transition: background-color 0.25s, box-shadow 0.25s;
}

.site-header.is-scrolled,
.site-header.is-open {
	background: var(--color-header-bg);
	box-shadow: 0 1px 0 var(--color-border);
	-webkit-backdrop-filter: saturate(1.4) blur(8px);
	backdrop-filter: saturate(1.4) blur(8px);
}

.site-header.is-open {
	background: var(--color-bg);
}

.scroll-progress {
	position: absolute;
	inset: 0 0 auto;
	height: 3px;
	background: var(--color-accent);
	transform: scaleX(0);
	transform-origin: left;
	pointer-events: none;
}

.site-header .navbar {
	min-height: var(--header-height);
	padding: 0;
}

.brand {
	display: inline-flex;
	align-items: center;
	padding: 0.5rem 0;
	color: var(--color-primary);
}

.brand-mark {
	width: 74px;
	height: 28px;
	fill: currentColor;
}

.theme-toggle {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	margin-left: auto;
	padding: 0;
	background: transparent;
	border: 1px solid var(--color-border);
	border-radius: 50%;
	font-size: 1.05rem;
	color: var(--color-primary);
	transition: background-color 0.2s, border-color 0.2s, transform 0.4s var(--ease);
}

.theme-toggle:hover {
	background: var(--color-surface);
	border-color: var(--color-primary);
}

.theme-toggle:active {
	transform: rotate(-20deg) scale(0.94);
}

/* Show the icon for the theme you would switch to */
.theme-toggle .bi-sun,
:root[data-theme="dark"] .theme-toggle .bi-moon-stars {
	display: none;
}

:root[data-theme="dark"] .theme-toggle .bi-sun {
	display: inline-block;
}

@media (min-width: 992px) {
	.theme-toggle {
		margin-left: 0.75rem;
	}
}

.navbar-toggler {
	border: 0;
	padding: 0.25rem 0.5rem;
	font-size: 1.75rem;
	line-height: 1;
	color: var(--color-primary);
}

.navbar-toggler:focus {
	box-shadow: none;
}

.navbar-nav .nav-link {
	position: relative;
	padding: 0.5rem 0.85rem;
	font-size: 0.925rem;
	font-weight: 600;
	color: var(--color-muted);
	transition: color 0.2s;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
	color: var(--color-primary);
}

.navbar-nav .nav-link.active::after {
	content: "";
	position: absolute;
	left: 0.85rem;
	right: 0.85rem;
	bottom: 0.15rem;
	height: 2px;
	background: var(--color-accent);
}

.nav-resume {
	margin-left: 0.5rem;
}

@media (max-width: 991.98px) {
	.navbar-collapse {
		padding: 0.5rem 0 1.25rem;
	}

	.navbar-nav .nav-link {
		padding: 0.75rem 0;
		font-size: 1rem;
		border-bottom: 1px solid var(--color-border);
	}

	.navbar-nav .nav-link.active::after {
		left: 0;
		right: auto;
		top: 50%;
		bottom: auto;
		width: 3px;
		height: 1.1rem;
		transform: translate(-0.75rem, -50%);
	}

	.nav-resume {
		margin: 1rem 0 0;
	}
}

/* 5. Hero
   -------------------------------------------------------------------------- */
.hero {
	position: relative;
	overflow: hidden;
	padding: calc(var(--header-height) + clamp(3rem, 7vw, 5.5rem)) 0 clamp(3rem, 6vw, 4.5rem);
	isolation: isolate;
}

/* Dot grid fading out from the top right, plus a soft sage glow */
.hero::before,
.hero::after {
	content: "";
	position: absolute;
	z-index: -1;
	pointer-events: none;
}

.hero::before {
	inset: 0;
	background-image: radial-gradient(var(--color-dot) 1px, transparent 1px);
	background-size: 22px 22px;
	-webkit-mask-image: radial-gradient(ellipse 70% 70% at 85% 20%, #000 10%, transparent 70%);
	mask-image: radial-gradient(ellipse 70% 70% at 85% 20%, #000 10%, transparent 70%);
}

.hero::after {
	top: -20%;
	right: -10%;
	width: 55vw;
	height: 55vw;
	max-width: 760px;
	max-height: 760px;
	background: radial-gradient(circle, rgba(156, 184, 162, 0.35), transparent 65%);
	animation: glow-drift 18s ease-in-out infinite alternate;
}

@keyframes glow-drift {
	to { transform: translate(-6%, 8%) scale(1.08); }
}

.eyebrow,
.section-kicker {
	margin-bottom: 1rem;
	font-family: var(--font-mono);
	font-size: 0.8rem;
	font-weight: 500;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--color-accent);
}

.section-kicker::before {
	content: "";
	display: inline-block;
	width: 24px;
	height: 1px;
	margin-right: 0.6rem;
	vertical-align: middle;
	background: currentColor;
	transform-origin: left;
}

.eyebrow span {
	margin: 0 0.4rem;
	color: var(--color-muted);
}

.hero-title {
	margin-bottom: 1.25rem;
	font-size: clamp(2.75rem, 6.5vw, 4.75rem);
	font-weight: 800;
	letter-spacing: -0.035em;
	line-height: 1;
}

.hero-lead {
	max-width: 34ch;
	margin-bottom: 1rem;
	font-size: clamp(1.2rem, 2.2vw, 1.5rem);
	font-weight: 600;
	line-height: 1.4;
	color: var(--color-primary);
}

.hero-sub {
	max-width: 52ch;
	margin-bottom: 2rem;
	color: var(--color-muted);
}

.hero-actions {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.75rem;
	margin-bottom: 2rem;
}

.social-list,
.footer-social {
	display: flex;
	gap: 0.5rem;
}

.social-list a,
.footer-social a {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	border: 1px solid var(--color-border);
	border-radius: 50%;
	font-size: 1.1rem;
	color: var(--color-primary);
	text-decoration: none;
	transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.social-list a:hover {
	background: var(--color-primary);
	border-color: var(--color-primary);
	color: var(--color-on-primary);
}

.hero-visual {
	position: relative;
	max-width: 400px;
	margin: 0 0 0 auto;
}

.portrait-stage {
	position: relative;
	padding-top: 1.5rem;
}

/* Navy arch behind the cut-out; the head rises above its top edge */
.portrait-backdrop {
	position: absolute;
	inset: 22% 3% 0;
	overflow: hidden;
	background: var(--color-portrait-bg);
	border-radius: 220px 220px 10px 10px;
}

.portrait-backdrop::before {
	content: "";
	position: absolute;
	inset: 0;
	background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
	background-size: 16px 16px;
}

.portrait-backdrop::after {
	content: "";
	position: absolute;
	inset: 0;
	background: radial-gradient(circle at 50% 25%, rgba(156, 184, 162, 0.45), transparent 60%);
}

.portrait-ring {
	position: absolute;
	top: 6%;
	left: 6%;
	width: 88%;
	aspect-ratio: 1;
	border: 1.5px dashed rgba(59, 106, 78, 0.45);
	border-radius: 50%;
	animation: spin 60s linear infinite;
}

@keyframes spin {
	to { transform: rotate(360deg); }
}

.portrait-stage img {
	position: relative;
	display: block;
	width: 90%;
	margin: 0 auto;
	filter: drop-shadow(0 18px 28px rgba(13, 23, 41, 0.28));
}

.float-chip {
	position: absolute;
	top: 30%;
	right: -0.75rem;
	z-index: 2;
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	padding: 0.5rem 0.8rem;
	background: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: 999px;
	box-shadow: 0 10px 24px rgba(13, 23, 41, 0.12);
	font-family: var(--font-mono);
	font-size: 0.75rem;
	font-weight: 500;
	color: var(--color-primary);
	animation: float 6s ease-in-out infinite;
}

.float-chip i {
	color: var(--color-accent);
}

.float-chip-left {
	top: 54%;
	right: auto;
	left: -1rem;
	animation-delay: -3s;
}

.chip-top-right {
	top: 6%;
	right: 0;
	animation-delay: -1.5s;
}

.chip-top-left {
	top: 36%;
	right: auto;
	left: -2rem;
	animation-delay: -4.5s;
}

.chip-mid-right {
	top: 66%;
	right: -1.5rem;
	animation-delay: -2s;
}

.chip-low-right {
	top: 84%;
	right: -0.5rem;
	animation-delay: -5s;
}

@keyframes float {
	50% { transform: translateY(-8px); }
}

.stack-card {
	position: absolute;
	left: -1.5rem;
	bottom: 1.5rem;
	z-index: 2;
	max-width: calc(100% + 1.5rem);
	padding: 0.85rem 1.1rem;
	background: var(--color-ink-bg);
	border-left: 3px solid var(--color-secondary);
	border-radius: 4px;
	box-shadow: 0 12px 30px rgba(13, 23, 41, 0.18);
}

.stack-card-label {
	display: block;
	margin-bottom: 0.2rem;
	font-family: var(--font-mono);
	font-size: 0.7rem;
	color: var(--color-secondary);
}

.stack-card code {
	display: inline-block;
	min-width: 21ch;
	font-family: var(--font-mono);
	font-size: 0.8rem;
	color: var(--color-on-dark);
}

.stack-card code.is-typing::after {
	content: "";
	display: inline-block;
	width: 0.5em;
	height: 1em;
	margin-left: 2px;
	vertical-align: -0.15em;
	background: var(--color-secondary);
	animation: caret 1s steps(1) infinite;
}

@keyframes caret {
	50% { opacity: 0; }
}

.hero-facts {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 1.5rem;
	margin: clamp(3rem, 6vw, 4.5rem) 0 0;
	padding-top: 2rem;
	border-top: 1px solid var(--color-border);
}

.hero-facts dt {
	font-variant-numeric: tabular-nums;
	font-size: clamp(1.6rem, 3vw, 2.25rem);
	font-weight: 800;
	letter-spacing: -0.02em;
	color: var(--color-primary);
	line-height: 1.1;
}

.hero-facts dd {
	margin: 0.35rem 0 0;
	font-size: 0.9rem;
	color: var(--color-muted);
}

@media (max-width: 991.98px) {
	.hero-visual {
		max-width: 340px;
		margin: 0 auto;
	}
}

/* Tech strip */
.tech-marquee {
	overflow: hidden;
	padding: 1.1rem 0;
	background: var(--color-surface);
	border-block: 1px solid var(--color-border);
	-webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
	mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.marquee-track {
	display: flex;
	width: max-content;
	animation: marquee 45s linear infinite;
}

.tech-marquee:hover .marquee-track {
	animation-play-state: paused;
}

.marquee-track span {
	display: inline-flex;
	align-items: center;
	padding: 0 1.5rem;
	font-family: var(--font-mono);
	font-size: 0.85rem;
	color: var(--color-muted);
	white-space: nowrap;
}

.marquee-track span::before {
	content: "";
	width: 6px;
	height: 6px;
	margin-right: 1.5rem;
	background: var(--color-secondary);
	transform: rotate(45deg);
}

@keyframes marquee {
	to { transform: translateX(-50%); }
}

@media (max-width: 575.98px) {
	.hero-facts {
		grid-template-columns: 1fr;
		gap: 1rem;
	}

	.hero-facts > div {
		display: grid;
		grid-template-columns: 7.5rem 1fr;
		align-items: baseline;
		gap: 0.75rem;
	}

	.hero-facts dt {
		font-size: 1.5rem;
	}

	.hero-facts dd {
		margin: 0;
	}

	.hero-visual {
		max-width: 290px;
	}

	.float-chip {
		right: -0.25rem;
		font-size: 0.7rem;
	}

	.float-chip-left {
		right: auto;
		left: -0.5rem;
	}

	.chip-top-right {
		right: -0.5rem;
	}

	/* Four chips fit around a phone-sized portrait without covering the face */
	.chip-top-left,
	.chip-low-right {
		display: none;
	}

	.chip-mid-right {
		right: -0.75rem;
	}

	.stack-card {
		left: -0.5rem;
	}

	.stack-card code {
		font-size: 0.72rem;
	}
}

/* 6. Sections
   -------------------------------------------------------------------------- */
.section {
	padding: var(--section-space) 0;
}

.section-compact {
	padding: calc(var(--section-space) * 0.75) 0;
}

.section-surface {
	background: var(--color-surface);
}

.section-ink {
	background: var(--color-ink-bg);
	color: var(--color-on-dark-muted);
}

.section-ink .section-title {
	color: var(--color-on-dark);
}

.section-ink .section-kicker {
	color: var(--color-secondary);
}

.section-title {
	max-width: 22ch;
	margin-bottom: clamp(2rem, 4vw, 3rem);
	font-size: clamp(1.75rem, 3.4vw, 2.6rem);
	font-weight: 800;
}

.section-title-sm {
	font-size: clamp(1.5rem, 2.6vw, 2rem);
}

.about-lead {
	margin-bottom: 1rem;
	font-size: 1.2rem;
	line-height: 1.6;
	color: var(--color-primary);
}

.focus-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 2rem 2.5rem;
	margin: 2.75rem 0;
}

.focus-item {
	padding-top: 1.25rem;
	border-top: 2px solid var(--color-border);
}

.focus-item i {
	display: block;
	margin-bottom: 0.6rem;
	font-size: 1.35rem;
	color: var(--color-accent);
}

.focus-item h3 {
	margin-bottom: 0.4rem;
	font-size: 1.05rem;
}

.focus-item p {
	font-size: 0.95rem;
	color: var(--color-muted);
}

.domain-list {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.75rem 1rem;
}

.domain-label {
	font-family: var(--font-mono);
	font-size: 0.75rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--color-muted);
}

.domain-list ul {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
}

.domain-list li {
	padding: 0.3rem 0.85rem;
	border: 1px solid var(--color-border);
	border-radius: 999px;
	font-size: 0.875rem;
	font-weight: 600;
	color: var(--color-primary);
}

@media (max-width: 991.98px) {
	.section .row > [class*="col-lg"] > .section-title:last-child {
		margin-bottom: 0;
	}
}

@media (max-width: 575.98px) {
	.focus-grid {
		grid-template-columns: 1fr;
		gap: 1.5rem;
	}
}

/* 7. Impact
   -------------------------------------------------------------------------- */
.impact-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 2.5rem 2rem;
}

.impact-item {
	display: flex;
	flex-direction: column;
	padding-top: 1.5rem;
	border-top: 1px solid var(--color-on-dark-border);
}

.impact-value {
	font-variant-numeric: tabular-nums;
	font-size: clamp(2.25rem, 4.5vw, 3.25rem);
	font-weight: 800;
	letter-spacing: -0.03em;
	line-height: 1;
	color: var(--color-on-dark);
}

.impact-label {
	margin: 0.6rem 0 0.4rem;
	font-weight: 700;
	color: var(--color-secondary);
}

.impact-note {
	font-size: 0.925rem;
}

@media (max-width: 991.98px) {
	.impact-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 575.98px) {
	.impact-grid {
		grid-template-columns: 1fr;
		gap: 1.75rem;
	}
}

/* 8. Experience & projects
   -------------------------------------------------------------------------- */
.timeline-item {
	display: grid;
	grid-template-columns: 220px 1fr;
	gap: 2rem;
	padding: 2.5rem 0;
	border-top: 1px solid var(--color-border);
}

.timeline-item:last-child {
	border-bottom: 1px solid var(--color-border);
}

.timeline-meta {
	display: flex;
	flex-direction: column;
	gap: 0.25rem;
}

.timeline-date {
	font-family: var(--font-mono);
	font-size: 0.85rem;
	font-weight: 500;
	color: var(--color-primary);
}

.timeline-place {
	font-size: 0.875rem;
	color: var(--color-muted);
}

.timeline-body {
	position: relative;
	padding-left: 2rem;
}

.timeline-body::before,
.timeline-body::after {
	content: "";
	position: absolute;
	left: 0;
	top: 0.6rem;
	bottom: 0;
	width: 2px;
	background: var(--color-border);
}

.timeline-body::after {
	background: var(--color-accent);
	transform-origin: top;
}

.timeline-body h3::before {
	content: "";
	position: absolute;
	left: -5px;
	top: 0.4rem;
	z-index: 1;
	width: 12px;
	height: 12px;
	background: var(--color-bg);
	border: 2px solid var(--color-accent);
	border-radius: 50%;
}

.timeline-body h3 {
	margin-bottom: 0.35rem;
	font-size: clamp(1.25rem, 2.2vw, 1.5rem);
}

.role {
	margin-bottom: 0.75rem;
	font-weight: 700;
	color: var(--color-accent);
}

.role-overview {
	max-width: 62ch;
	margin-bottom: 1.25rem;
	color: var(--color-muted);
}

.highlights,
.project-points {
	display: grid;
	gap: 0.6rem;
	max-width: 76ch;
}

.highlights li,
.project-points li {
	position: relative;
	padding-left: 1.25rem;
}

.highlights li::before,
.project-points li::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0.65em;
	width: 6px;
	height: 6px;
	background: var(--color-accent);
}

@media (max-width: 767.98px) {
	.timeline-item {
		grid-template-columns: 1fr;
		gap: 0.75rem;
		padding: 2rem 0;
	}

	.timeline-meta {
		flex-direction: row;
		flex-wrap: wrap;
		gap: 0.25rem 1rem;
	}
}

.project-meta {
	margin-bottom: 0.5rem;
	font-family: var(--font-mono);
	font-size: 0.75rem;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--color-muted);
}

.project-featured {
	padding: clamp(1.75rem, 4vw, 3rem);
	background: var(--color-bg);
	border-left: 4px solid var(--color-accent);
	border-radius: var(--radius);
}

.project-featured h3 {
	margin-bottom: 0.85rem;
	font-size: clamp(1.4rem, 2.8vw, 2rem);
	font-weight: 800;
}

.project-featured > .row > div:first-child > p:not(.project-meta) {
	margin-bottom: 1.25rem;
	color: var(--color-muted);
}

.project-outcome {
	display: flex;
	flex-direction: column;
	margin-bottom: 1.5rem;
	padding-bottom: 1.5rem;
	border-bottom: 1px solid var(--color-border);
}

.project-outcome .impact-value {
	color: var(--color-primary);
}

.project-outcome .impact-label {
	color: var(--color-muted);
	font-weight: 600;
}

.project-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 1.5rem;
	margin-top: 1.5rem;
}

.project-card {
	display: flex;
	flex-direction: column;
	padding: 1.75rem;
	background: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s;
}

.project-card,
.project-featured {
	position: relative;
	isolation: isolate;
}

.project-card::before,
.project-featured::before {
	content: "";
	position: absolute;
	inset: 0;
	z-index: -1;
	border-radius: inherit;
	background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(59, 106, 78, 0.12), transparent 70%);
	opacity: 0;
	transition: opacity 0.3s;
	pointer-events: none;
}

.project-card:hover::before,
.project-featured:hover::before {
	opacity: 1;
}

.project-card:hover {
	transform: translateY(-3px);
	border-color: var(--color-card-hover-border);
	box-shadow: 0 14px 30px rgba(19, 32, 58, 0.08);
}

.project-card h3 {
	margin-bottom: 0.75rem;
	font-size: 1.15rem;
}

.project-card > p:not(.project-meta) {
	margin-bottom: 1.5rem;
	font-size: 0.95rem;
	color: var(--color-muted);
}

.project-card .tag-list {
	margin-top: auto;
}

.tag-list {
	display: flex;
	flex-wrap: wrap;
	gap: 0.4rem;
}

.tag-list li {
	padding: 0.2rem 0.55rem;
	background: var(--color-accent-tint);
	border-radius: 4px;
	font-family: var(--font-mono);
	font-size: 0.75rem;
	color: var(--color-accent);
}

@media (max-width: 991.98px) {
	.project-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 575.98px) {
	.project-grid {
		grid-template-columns: 1fr;
	}
}

/* 9. Skills
   -------------------------------------------------------------------------- */
.core-stack {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 1rem 1.25rem;
	margin-bottom: 3rem;
}

.core-stack-label {
	font-family: var(--font-mono);
	font-size: 0.75rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--color-muted);
}

.core-stack ul {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
}

.core-stack li {
	transition: transform 0.2s var(--ease), background-color 0.2s;
	padding: 0.45rem 0.95rem;
	background: var(--color-primary);
	border-radius: 6px;
	font-size: 0.925rem;
	font-weight: 700;
	color: var(--color-on-primary);
}

.core-stack li:hover {
	transform: translateY(-2px);
	background: var(--color-accent);
}

.skill-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 2rem 2.5rem;
}

.skill-group {
	padding-top: 1rem;
	border-top: 1px solid var(--color-border);
}

.skill-group h3 {
	margin-bottom: 0.5rem;
	font-family: var(--font-mono);
	font-size: 0.8rem;
	font-weight: 500;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--color-accent);
}

.skill-group p {
	font-size: 0.95rem;
}

.learning {
	display: flex;
	flex-wrap: wrap;
	gap: 1.5rem 3rem;
	margin: 3rem 0 0;
	padding: 1.5rem;
	background: var(--color-surface);
	border: 1px dashed var(--color-border);
	border-radius: var(--radius);
}

.learning dt {
	font-family: var(--font-mono);
	font-size: 0.75rem;
	font-weight: 500;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--color-muted);
}

.learning dd {
	margin: 0.25rem 0 0;
	font-weight: 600;
}

@media (max-width: 991.98px) {
	.skill-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 575.98px) {
	.skill-grid {
		grid-template-columns: 1fr;
		gap: 1.25rem;
	}
}

/* 10. Education
   -------------------------------------------------------------------------- */
.edu-list {
	display: grid;
	gap: 1.5rem;
}

.edu-list li {
	padding-left: 1.25rem;
	border-left: 2px solid var(--color-border);
}

.edu-list li:first-child {
	border-left-color: var(--color-accent);
}

.edu-list h3 {
	margin-bottom: 0.2rem;
	font-size: 1rem;
}

.edu-list li:first-child h3 {
	font-size: 1.15rem;
}

.edu-list p {
	margin-bottom: 0;
	font-size: 0.95rem;
}

.edu-meta {
	color: var(--color-muted);
}

.award {
	display: flex;
	gap: 1rem;
	padding: 1.5rem;
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
}

.award i {
	font-size: 1.5rem;
	color: var(--color-accent);
}

.award h3 {
	margin-bottom: 0.25rem;
	font-size: 1.05rem;
}

.award p {
	font-size: 0.95rem;
	color: var(--color-muted);
}

/* 11. Contact & footer
   -------------------------------------------------------------------------- */
.contact-title {
	max-width: 16ch;
	margin-bottom: 1.25rem;
	font-size: clamp(2.1rem, 5vw, 3.5rem);
}

.contact-lead {
	max-width: 48ch;
	margin-bottom: 1.75rem;
}

.contact-email {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	font-size: clamp(1.2rem, 3vw, 1.85rem);
	font-weight: 700;
	color: var(--color-on-dark);
	text-decoration: underline;
	text-decoration-color: var(--color-secondary);
	text-decoration-thickness: 2px;
	text-underline-offset: 6px;
	overflow-wrap: anywhere;
	transition: color 0.2s;
}

.contact-email:hover {
	color: var(--color-secondary);
}

.contact-actions {
	margin-top: 2rem;
}

.contact-list li {
	display: flex;
	align-items: center;
	gap: 1rem;
	padding: 0.85rem 0;
	border-bottom: 1px solid var(--color-on-dark-border);
}

.contact-list i {
	width: 1.25rem;
	color: var(--color-secondary);
}

.contact-list a {
	color: var(--color-on-dark);
	text-decoration: none;
	overflow-wrap: anywhere;
}

.contact-list a:hover {
	text-decoration: underline;
	text-underline-offset: 4px;
}

.site-footer {
	padding: 2.5rem 0 2rem;
	background: var(--color-primary-deep);
	color: var(--color-on-dark-muted);
	font-size: 0.9rem;
}

.footer-inner {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 1.5rem;
	padding-bottom: 1.5rem;
	border-bottom: 1px solid var(--color-on-dark-border);
}

.footer-name {
	margin-bottom: 0.2rem;
	font-weight: 800;
	color: var(--color-on-dark);
}

.footer-title {
	margin: 0;
}

.footer-social a {
	border-color: var(--color-on-dark-border);
	color: var(--color-on-dark);
}

.footer-social a:hover {
	background: var(--color-on-dark);
	color: var(--color-primary-deep);
}

.footer-copy {
	margin: 1.25rem 0 0;
	font-size: 0.85rem;
}

.back-to-top {
	position: fixed;
	right: 1.25rem;
	bottom: 1.25rem;
	z-index: 1020;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	background: var(--color-ink-bg);
	border: 1px solid var(--color-on-dark-border);
	border-radius: 50%;
	color: var(--color-on-dark);
	font-size: 1.1rem;
	text-decoration: none;
	opacity: 0;
	visibility: hidden;
	transform: translateY(8px);
	transition: opacity 0.25s, transform 0.25s var(--ease), visibility 0.25s, background-color 0.2s;
}

.back-to-top.is-visible {
	opacity: 1;
	visibility: visible;
	transform: none;
}

.back-to-top:hover {
	background: var(--color-accent);
	color: var(--color-on-dark);
}

/* 12. Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
	html {
		scroll-behavior: smooth;
	}

	.js .reveal {
		opacity: 0;
		transform: translateY(14px);
		transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
	}

	.js .reveal.is-visible {
		opacity: 1;
		transform: none;
	}

	.js .hero-visual.reveal {
		transform: translateY(14px) scale(0.97);
	}

	.js .hero-visual.reveal.is-visible {
		transform: none;
	}

	.js .section-kicker.reveal::before {
		transform: scaleX(0);
		transition: transform 0.6s var(--ease) 0.2s;
	}

	.js .section-kicker.reveal.is-visible::before {
		transform: scaleX(1);
	}

	.js .timeline-item .timeline-body::after {
		transform: scaleY(0);
		transition: transform 1.4s var(--ease) 0.2s;
	}

	.js .timeline-item.is-visible .timeline-body::after {
		transform: scaleY(1);
	}
}

@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		transition-duration: 0.01ms !important;
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
	}

	.hero::after,
	.portrait-ring,
	.float-chip,
	.marquee-track,
	.stack-card code::after {
		animation: none !important;
	}
}