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

/* Custom Properties */

:root {
    --ff-primary: 'Source Sans Pro', sans-serif;
    --ff-secondary: 'Source Code Pro', monospace;

    --clr-accent: #2272FF;
    --clr-accent-2: #7c5cff;

    --fs-h1: clamp(2.75rem, 8vw, 5rem);
    --fs-h2: clamp(2rem, 5vw, 3rem);
    --fs-h3: 1.2rem;
    --fs-body: 1.0625rem;

    --radius: 16px;
    --ease: cubic-bezier(.2, .7, .2, 1);
    --header-h: 64px;
}

:root,
[data-theme="dark"] {
    --bg: #0b0f17;
    --surface: #121826;
    --surface-2: #182033;
    --border: rgba(255, 255, 255, .09);
    --text: #e8ecf4;
    --muted: #96a1b8;
    --accent-text: #6aa3ff;
    --shadow: 0 10px 40px rgba(0, 0, 0, .35);
    --glow: rgba(34, 114, 255, .18);
    --particle: 106, 163, 255;
}

[data-theme="light"] {
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-2: #eef2fa;
    --border: rgba(20, 30, 60, .1);
    --text: #1a2233;
    --muted: #5a667d;
    --accent-text: #1c5fe0;
    --shadow: 0 10px 30px rgba(30, 50, 100, .12);
    --glow: rgba(34, 114, 255, .12);
    --particle: 34, 114, 255;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-h);
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--ff-primary);
    font-size: var(--fs-body);
    line-height: 1.65;
    overflow-x: hidden;
    transition: background-color 300ms ease, color 300ms ease;
}

img { display: block; max-width: 100%; }
a { color: var(--accent-text); }
strong { font-weight: 600; color: var(--text); }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3 { line-height: 1.1; margin: 0; }
h1 { font-size: var(--fs-h1); font-weight: 300; }
h2 { font-size: var(--fs-h2); font-weight: 900; letter-spacing: -.01em; }
h3 { font-size: var(--fs-h3); font-weight: 600; }
p { margin: 0; }

:focus-visible {
    outline: 3px solid var(--clr-accent);
    outline-offset: 3px;
    border-radius: 6px;
}

.muted { color: var(--muted); }
.grad {
    font-weight: 900;
    background: linear-gradient(100deg, var(--clr-accent), var(--clr-accent-2) 60%, #35d0ff);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: shimmer 6s linear infinite;
}

@keyframes shimmer { to { background-position: -200% 0; } }

/* Layout */

#bg {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

main, .footer, .site-header { position: relative; z-index: 1; }

.container {
    width: min(1100px, 100% - 3rem);
    margin: 0 auto;
}
.container--narrow { width: min(800px, 100% - 3rem); }

.section { padding: 6.5rem 0; }

.section__head { margin-bottom: 2.5rem; }

.eyebrow {
    font-family: var(--ff-secondary);
    font-size: .85rem;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--accent-text);
    margin-bottom: .6rem;
}

.grid { display: grid; gap: 1.25rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

.panel {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.6rem;
    box-shadow: var(--shadow);
    transition: border-color 250ms ease, transform 250ms var(--ease);
}
.panel:hover { border-color: rgba(34, 114, 255, .5); }
.panel h3 { margin-bottom: 1rem; display: flex; align-items: center; gap: .6rem; }
.panel h3 i { color: var(--accent-text); font-size: 1rem; }

/* Reveal on scroll (only hides when JS is available) */

.js .reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 700ms var(--ease), transform 700ms var(--ease);
    transition-delay: var(--d, 0ms);
}
.js .reveal.in { opacity: 1; transform: none; }

/* Header / nav */

.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 max(1.5rem, calc((100% - 1100px) / 2));
    z-index: 100;
    background: color-mix(in srgb, var(--bg) 78%, transparent);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color 250ms ease, box-shadow 250ms ease;
}
.site-header.scrolled { border-bottom-color: var(--border); box-shadow: 0 4px 24px rgba(0, 0, 0, .12); }

.brand {
    font-family: var(--ff-secondary);
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--text);
    text-decoration: none;
}
.brand span { color: var(--clr-accent); }

.nav { display: flex; gap: .25rem; }

.nav__link {
    position: relative;
    padding: .45rem .85rem;
    color: var(--muted);
    text-decoration: none;
    font-size: .95rem;
    font-weight: 600;
    border-radius: 8px;
    transition: color 200ms ease;
}
.nav__link::after {
    content: '';
    position: absolute;
    left: .85rem; right: .85rem; bottom: 2px;
    height: 2px;
    background: var(--clr-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 300ms var(--ease);
}
.nav__link:hover,
.nav__link.active { color: var(--text); }
.nav__link:hover::after,
.nav__link.active::after { transform: scaleX(1); }

.header-actions { display: flex; gap: .5rem; align-items: center; }

.icon-btn {
    width: 40px; height: 40px;
    display: grid; place-items: center;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 250ms var(--ease), border-color 200ms ease, color 200ms ease;
}
.icon-btn:hover { transform: rotate(15deg) scale(1.08); border-color: var(--clr-accent); color: var(--accent-text); }

.nav-toggle { display: none; }

@media (max-width: 800px) {
    .nav-toggle { display: grid; }
    .nav {
        position: fixed;
        top: var(--header-h); left: 0; right: 0;
        flex-direction: column;
        gap: 0;
        padding: .75rem 1.5rem 1.25rem;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: transform 300ms var(--ease), opacity 300ms ease, visibility 300ms;
    }
    .nav-open .nav { transform: none; opacity: 1; visibility: visible; }
    .nav__link { padding: .8rem .25rem; font-size: 1.1rem; }
    .nav__link::after { left: .25rem; right: auto; width: 2rem; }
}

/* Buttons & chips */

.btn {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    padding: .8rem 1.5rem;
    font: 600 .95rem var(--ff-primary);
    text-decoration: none;
    border-radius: 999px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 250ms var(--ease), box-shadow 250ms ease, background-color 250ms ease, border-color 250ms ease;
}
.btn i { transition: transform 250ms var(--ease); }
.btn:hover i { transform: translateX(3px); }
.btn--primary { background: var(--clr-accent); color: #fff; box-shadow: 0 8px 24px rgba(34, 114, 255, .35); }
.btn--primary:hover { box-shadow: 0 12px 32px rgba(34, 114, 255, .5); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--clr-accent); color: var(--accent-text); }

.chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .28rem .8rem;
    font: 400 .82rem var(--ff-secondary);
    color: var(--accent-text);
    background: var(--glow);
    border: 1px solid rgba(34, 114, 255, .25);
    border-radius: 999px;
}
.chips--sm .chip { font-size: .74rem; padding: .18rem .6rem; }
.chips--hover .chip { transition: transform 200ms var(--ease), background-color 200ms ease, color 200ms ease; cursor: default; }
.chips--hover .chip:hover { transform: translateY(-3px); background: var(--clr-accent); color: #fff; }

/* Hero */

.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    align-items: center;
    gap: 3rem;
    padding: calc(var(--header-h) + 2rem) max(1.5rem, calc((100% - 1100px) / 2)) 4rem;
}

.hero__name { margin: .2rem 0 .8rem; }

.hero__role {
    font-family: var(--ff-secondary);
    font-size: clamp(1.1rem, 3vw, 1.6rem);
    color: var(--accent-text);
    min-height: 1.6em;
}
.caret {
    display: inline-block;
    width: 2px; height: 1.1em;
    margin-left: 3px;
    vertical-align: -.15em;
    background: var(--accent-text);
    animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero__blurb { max-width: 540px; margin: 1.25rem 0 2rem; color: var(--muted); font-size: 1.15rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .85rem; }

.hero__social { display: flex; gap: .75rem; margin-top: 2rem; }
.hero__social a {
    display: grid; place-items: center;
    width: 44px; height: 44px;
    color: var(--muted);
    font-size: 1.2rem;
    border: 1px solid var(--border);
    border-radius: 50%;
    transition: transform 250ms var(--ease), color 200ms ease, border-color 200ms ease, background-color 200ms ease;
}
.hero__social a:hover { transform: translateY(-4px); color: #fff; background: var(--clr-accent); border-color: var(--clr-accent); }

.hero__photo { position: relative; justify-self: center; }

.photo-ring {
    position: relative;
    width: min(320px, 70vw);
    aspect-ratio: 1;
    border-radius: 50%;
    padding: 6px;
    background: conic-gradient(from 0deg, var(--clr-accent), var(--clr-accent-2), #35d0ff, var(--clr-accent));
    animation: spin 8s linear infinite;
    box-shadow: 0 0 80px var(--glow);
}
.photo-ring img {
    width: 100%; height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 6px solid var(--bg);
    animation: spin 8s linear infinite reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }

.chip--float {
    position: absolute;
    padding: .5rem 1rem;
    font-size: .8rem;
    background: var(--surface);
    box-shadow: var(--shadow);
    animation: float 5s ease-in-out infinite;
}
.chip--a { top: 6%; left: -14%; }
.chip--b { top: 42%; right: -12%; animation-delay: -1.5s; }
.chip--c { bottom: 6%; left: -2%; animation-delay: -3s; }
@keyframes float { 50% { transform: translateY(-12px); } }

.scroll-hint {
    position: absolute;
    left: 50%; bottom: 1.5rem;
    translate: -50% 0;
    color: var(--muted);
    text-decoration: none;
    animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce { 50% { transform: translateY(8px); } }

@media (max-width: 800px) {
    .hero { grid-template-columns: 1fr; text-align: center; padding-bottom: 5rem; }
    .hero__text { order: 2; }
    .hero__photo { order: 1; }
    .hero__blurb { margin-left: auto; margin-right: auto; }
    .hero__cta, .hero__social { justify-content: center; }
    .chip--a { left: -4%; }
    .chip--b { right: -4%; }
}

/* About */

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}
.stat {
    padding: 1.4rem;
    text-align: center;
    background: linear-gradient(160deg, var(--surface), var(--surface-2));
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.stat__num {
    display: block;
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1.1;
    background: linear-gradient(100deg, var(--clr-accent), #35d0ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-variant-numeric: tabular-nums;
}
.stat__label { color: var(--muted); font-size: .92rem; }

.edu + .edu { margin-top: 1.1rem; padding-top: 1.1rem; border-top: 1px solid var(--border); }
.edu__school { font-weight: 600; }
.edu__deg { color: var(--muted); font-size: .95rem; }
.edu__date { font-family: var(--ff-secondary); font-size: .8rem; color: var(--accent-text); margin-top: .2rem; }

.badge-link {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    text-decoration: none;
    font-size: .9rem;
}
.badge-link img { width: 72px; border-radius: 8px; transition: transform 300ms var(--ease); }
.badge-link:hover img { transform: rotate(-6deg) scale(1.08); }

/* Timeline */

.timeline { position: relative; padding-left: 2.5rem; }

.timeline__line {
    position: absolute;
    left: 7px; top: 8px; bottom: 8px;
    width: 2px;
    background: var(--border);
}
.timeline__fill {
    display: block;
    width: 100%;
    height: var(--fill, 0%);
    background: linear-gradient(var(--clr-accent), var(--clr-accent-2));
    border-radius: 2px;
}

.job { position: relative; margin-bottom: 1.5rem; }
.job:last-child { margin-bottom: 0; }

.job__dot {
    position: absolute;
    left: -2.5rem; top: 1.8rem;
    width: 16px; height: 16px;
    background: var(--bg);
    border: 3px solid var(--clr-accent);
    border-radius: 50%;
    transition: transform 300ms var(--ease), background-color 300ms ease;
}
.job:hover .job__dot { transform: scale(1.3); background: var(--clr-accent); }

.job__card {
    padding: 1.5rem 1.6rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform 300ms var(--ease), border-color 250ms ease;
}
.job__card:hover { transform: translateX(6px); border-color: rgba(34, 114, 255, .5); }

.job__date { font-family: var(--ff-secondary); font-size: .8rem; color: var(--accent-text); margin-bottom: .3rem; }
.job__org { color: var(--muted); margin: .25rem 0 .9rem; }

.more {
    margin-top: .9rem;
    padding: 0;
    background: none;
    border: 0;
    color: var(--accent-text);
    font: 600 .9rem var(--ff-primary);
    cursor: pointer;
}
.more i { margin-left: .3rem; transition: transform 300ms var(--ease); }
.more[aria-expanded="true"] i { transform: rotate(180deg); }

.job__body, .resume__frame {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 400ms var(--ease);
}
.job__body > div, .resume__frame > div { overflow: hidden; }
.more[aria-expanded="true"] + .job__body { grid-template-rows: 1fr; }

.bullets { padding-top: .9rem; }
.bullets li { position: relative; padding-left: 1.3rem; color: var(--muted); }
.bullets li + li { margin-top: .6rem; }
.bullets li::before {
    content: '';
    position: absolute;
    left: 0; top: .7em;
    width: 7px; height: 7px;
    border-radius: 2px;
    background: var(--clr-accent);
    transform: rotate(45deg);
}

/* Projects */

.filters { display: flex; flex-wrap: wrap; gap: .6rem; margin-bottom: 2rem; }
.filter {
    padding: .5rem 1.2rem;
    background: transparent;
    color: var(--muted);
    font: 600 .9rem var(--ff-primary);
    border: 1px solid var(--border);
    border-radius: 999px;
    cursor: pointer;
    transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease, transform 200ms var(--ease);
}
.filter:hover { color: var(--text); border-color: var(--clr-accent); transform: translateY(-2px); }
.filter.is-active { background: var(--clr-accent); border-color: var(--clr-accent); color: #fff; }

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.card {
    --mx: 50%; --my: 50%; --rx: 0deg; --ry: 0deg;
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 1.6rem;
    text-align: left;
    color: inherit;
    font: inherit;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    cursor: pointer;
    overflow: hidden;
    transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry));
    transition: transform 200ms ease-out, border-color 250ms ease, opacity 400ms ease;
    animation: card-in 500ms var(--ease) both;
    animation-delay: var(--d, 0ms);
}
.card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(380px circle at var(--mx) var(--my), var(--glow), transparent 60%);
    opacity: 0;
    transition: opacity 250ms ease;
    pointer-events: none;
}
.card:hover { border-color: rgba(34, 114, 255, .55); }
.card:hover::before { opacity: 1; }

@keyframes card-in { from { opacity: 0; transform: translateY(24px) scale(.97); } }

.card.is-hidden { display: none; }

.card__top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.card__icon {
    display: grid; place-items: center;
    width: 46px; height: 46px;
    font-size: 1.15rem;
    color: var(--accent-text);
    background: var(--glow);
    border-radius: 12px;
}
.card__year { font-family: var(--ff-secondary); font-size: .8rem; color: var(--muted); }
.card__title { margin-bottom: .5rem; }
.card__summary { color: var(--muted); font-size: .98rem; margin-bottom: 1.1rem; flex: 1; }
.card__more {
    margin-top: 1.1rem;
    font-size: .88rem;
    font-weight: 600;
    color: var(--accent-text);
}
.card__more i { transition: transform 250ms var(--ease); }
.card:hover .card__more i { transform: translateX(4px); }

/* Modal */

.modal {
    width: min(680px, 100% - 2rem);
    max-height: 88vh;
    padding: 0;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, .5);
    overflow: hidden;
}
.modal[open] { animation: modal-in 350ms var(--ease); }
.modal::backdrop { background: rgba(5, 8, 14, .7); backdrop-filter: blur(4px); animation: fade 300ms ease; }
@keyframes modal-in { from { opacity: 0; transform: translateY(24px) scale(.96); } }
@keyframes fade { from { opacity: 0; } }

.modal__box { position: relative; padding: 2rem; max-height: 88vh; overflow-y: auto; }
.modal__close { position: absolute; top: 1rem; right: 1rem; }
.modal h3 { font-size: 1.7rem; margin: .3rem 2.5rem .3rem 0; }
.modal .bullets { padding-top: 1.1rem; }
.modal .chips { margin-top: 1.25rem; }
.modal__links { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }
.modal__note { margin-top: 1.25rem; font-size: .9rem; }

/* Resume */

.resume__top { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }
.resume__actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.resume__frame.open { grid-template-rows: 1fr; }
.resume__frame iframe {
    width: 100%;
    height: 720px;
    margin-top: 1.5rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
}
.resume__fallback { margin-top: .75rem; font-size: .9rem; }

/* Footer */

.footer {
    padding: 6rem 0 2.5rem;
    text-align: center;
    background: linear-gradient(180deg, transparent, var(--surface) 70%);
    border-top: 1px solid var(--border);
}
.footer .hero__social { justify-content: center; }
.footer__mail {
    display: inline-block;
    margin: 1.25rem 0 .5rem;
    font-size: clamp(1.15rem, 4vw, 2rem);
    font-weight: 600;
    text-decoration: none;
    background: linear-gradient(100deg, var(--clr-accent), var(--clr-accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    transition: transform 250ms var(--ease);
}
.footer__copy { margin-top: 3rem; font-size: .85rem; }

/* Floating UI */

.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 100%;
    z-index: 200;
    background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-2), #35d0ff);
    transform-origin: left;
    transform: scaleX(var(--p, 0));
}

.cursor-glow {
    position: fixed;
    top: 0; left: 0;
    width: 500px; height: 500px;
    margin: -250px 0 0 -250px;
    background: radial-gradient(circle, var(--glow), transparent 65%);
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    transition: opacity 400ms ease;
    will-change: transform;
}
.cursor-glow.on { opacity: 1; }

.to-top {
    position: fixed;
    right: 1.5rem; bottom: 1.5rem;
    width: 46px; height: 46px;
    display: grid; place-items: center;
    color: #fff;
    background: var(--clr-accent);
    border: 0;
    border-radius: 50%;
    box-shadow: 0 8px 24px rgba(34, 114, 255, .45);
    cursor: pointer;
    z-index: 90;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: opacity 300ms ease, transform 300ms var(--ease);
}
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { transform: translateY(-4px); }

/* Accessibility: reduced motion */

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
    }
    .js .reveal { opacity: 1; transform: none; }
    .cursor-glow { display: none; }
}

@media (hover: none) {
    .cursor-glow { display: none; }
}