/* ═══════════════════════════════════════════════════════════════════════
   Personal site — stylesheet
   ───────────────────────────────────────────────────────────────────────
   Structure:
     1. Design tokens (edit these to restyle the whole site)
     2. Reset & base
     3. Layout primitives
     4. Components — buttons, pills, cards, chips
     5. Sections — nav, hero, work, about, experience, contact, footer
     6. Motion & responsive
   ═════════════════════════════════════════════════════════════════════ */


/* ═══ 1. DESIGN TOKENS ═════════════════════════════════════════════════
   Change the accent trio below and the entire site re-skins itself.     */

:root {
  /* Brand — the gradient is used on headings, buttons and glows */
  --accent-1: #7c5cff;
  --accent-2: #c04bff;
  --accent-3: #ff4d7d;
  --gradient: linear-gradient(100deg, var(--accent-1), var(--accent-2) 55%, var(--accent-3));

  /* Type */
  --font-display: 'Space Grotesk', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  /* Fluid type scale — grows with the viewport, no media queries needed */
  --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(1.6rem, 1.35rem + 1.2vw, 2.4rem);
  --step-3:  clamp(2.1rem, 1.6rem + 2.4vw, 3.6rem);
  --step-4:  clamp(2.8rem, 1.7rem + 5vw, 6rem);

  /* Spacing & shape */
  --space: clamp(1rem, 0.8rem + 1vw, 1.5rem);
  --section-y: clamp(4.5rem, 3rem + 7vw, 9rem);
  --radius: 16px;
  --radius-lg: 24px;
  --container: 1140px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ─── Dark theme (default) ─── */
:root,
:root[data-theme="dark"] {
  --bg: #0a0a10;
  --bg-alt: #0f0f18;
  --surface: #15151f;
  --surface-2: #1c1c28;
  --border: #262633;
  --text: #f2f2f7;
  --text-muted: #a0a0b4;
  --text-faint: #6e6e85;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.8);
  --glow-opacity: 0.5;
}

/* ─── Light theme ─── */
:root[data-theme="light"] {
  --bg: #ffffff;
  --bg-alt: #f7f7fb;
  --surface: #ffffff;
  --surface-2: #f2f2f8;
  --border: #e4e4ee;
  --text: #12121a;
  --text-muted: #5a5a70;
  --text-faint: #8b8ba3;
  --shadow: 0 20px 45px -25px rgba(20, 20, 45, 0.28);
  --glow-opacity: 0.28;
}


/* ═══ 2. RESET & BASE ══════════════════════════════════════════════════ */

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

/* The `hidden` attribute is only display:none in the UA stylesheet, so ANY
   author rule setting display (e.g. `.promo { display: grid }`) silently
   beats it and the element stays visible. Enforce it once, globally. */
[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  /* Stops the sticky nav from covering anchored headings */
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0 0 1em; text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
em { color: var(--text-faint); font-style: italic; }

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

::selection { background: var(--accent-1); color: #fff; }

.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -120%);
  z-index: 200;
  padding: 0.7rem 1.2rem;
  background: var(--accent-1);
  color: #fff;
  border-radius: 0 0 10px 10px;
  font-weight: 600;
}
.skip-link:focus { transform: translate(-50%, 0); }

/* Gradient text — used on hero and contact headings */
.grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}


/* ═══ 3. LAYOUT ════════════════════════════════════════════════════════ */

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

.section { padding-block: var(--section-y); }
.section--alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

.section__head { max-width: 620px; margin-bottom: 3rem; }

.section__label {
  display: inline-block;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 0.9rem;
}

.section__title { font-size: var(--step-3); margin-bottom: 1rem; }
.section__lede { color: var(--text-muted); font-size: var(--step-1); }


/* ═══ 4. COMPONENTS ════════════════════════════════════════════════════ */

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border: 1px solid transparent;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: var(--step-0);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
              background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(124, 92, 255, 0.6);
}
.btn--primary:hover { box-shadow: 0 14px 32px -8px rgba(124, 92, 255, 0.75); }

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn--ghost:hover { border-color: var(--accent-2); background: var(--surface-2); }

.btn--lg { padding: 1.1rem 2.2rem; font-size: var(--step-1); }

/* ─── Icon button ─── */
.icon-btn {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.icon-btn:hover { border-color: var(--accent-2); background: var(--surface-2); }
.icon-btn svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Show the icon for the theme you'd switch TO */
[data-theme="dark"] .icon-moon,
[data-theme="light"] .icon-sun { display: none; }

/* ─── Filter pills ─── */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2.5rem;
}
.pill {
  padding: 0.5rem 1.1rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
  font-family: inherit;
  font-size: var(--step--1);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.pill:hover { color: var(--text); border-color: var(--text-faint); }
.pill.is-active {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
}

/* ─── Tag & chip lists ─── */
.tags, .chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.tags li {
  padding: 0.25rem 0.7rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
}
.chips { gap: 0.6rem; }
.chips li {
  padding: 0.5rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: var(--step--1);
  font-weight: 500;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.chips li:hover { border-color: var(--accent-2); transform: translateY(-2px); }


/* ═══ 5. SECTIONS ══════════════════════════════════════════════════════ */

/* ─── Nav ─── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}
/* .is-stuck is added by JS once you scroll past the hero */
.nav.is-stuck { border-bottom-color: var(--border); }

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 72px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.nav__logo-mark {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--gradient);
  flex-shrink: 0;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-left: auto;
  margin-right: 1.5rem;
  font-size: var(--step--1);
  font-weight: 500;
}
.nav__links a {
  position: relative;
  color: var(--text-muted);
  transition: color 0.2s var(--ease);
}
.nav__links a:hover { color: var(--text); }
/* Animated underline */
.nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 100%;
  height: 2px;
  background: var(--gradient);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease);
}
.nav__links a:hover::after,
.nav__links a.is-current::after { transform: scaleX(1); transform-origin: left; }
.nav__links a.is-current { color: var(--text); }

.nav__resume {
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 100px;
}
.nav__resume::after { display: none; }

.nav__actions { display: flex; align-items: center; gap: 0.6rem; }

/* Burger — hidden on desktop, shown under 800px */
.nav__burger { display: none; flex-direction: column; gap: 4px; }
.nav__burger span {
  display: block;
  width: 17px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ─── Hero ─── */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: calc(100svh - 72px);
  padding-block: clamp(3rem, 8vw, 6rem);
  overflow: hidden;
}

/* The soft colored blob behind the headline */
.hero__glow {
  position: absolute;
  top: -25%;
  left: 50%;
  width: min(1000px, 130vw);
  aspect-ratio: 1;
  transform: translateX(-50%);
  background: radial-gradient(circle at 30% 40%, var(--accent-1), transparent 55%),
              radial-gradient(circle at 70% 55%, var(--accent-3), transparent 55%);
  opacity: var(--glow-opacity);
  filter: blur(90px);
  pointer-events: none;
  animation: drift 18s ease-in-out infinite alternate;
}
@keyframes drift {
  from { transform: translateX(-50%) translateY(0) scale(1); }
  to   { transform: translateX(-46%) translateY(40px) scale(1.12); }
}

.hero__inner { position: relative; max-width: 900px; }

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 1.8rem;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  70%  { box-shadow: 0 0 0 9px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.hero__title {
  font-size: var(--step-4);
  margin-bottom: 1.5rem;
}

.hero__lede {
  max-width: 55ch;
  font-size: var(--step-1);
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 3rem;
}

.hero__social {
  display: flex;
  flex-wrap: wrap;
  gap: 1.8rem;
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--text-muted);
}
.hero__social a { position: relative; transition: color 0.2s var(--ease); }
.hero__social a:hover { color: var(--text); }
.hero__social a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease);
}
.hero__social a:hover::after { transform: scaleX(1); transform-origin: left; }

/* ─── Project grid ─── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
              box-shadow 0.35s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  border-color: color-mix(in srgb, var(--accent-2) 45%, var(--border));
  box-shadow: var(--shadow);
}
/* Hidden by the tag filter */
.card[hidden] { display: none; }

/* Featured project — spans two columns where there's room for it */
@media (min-width: 800px) {
  .card--featured { grid-column: span 2; }
  .card--featured .card__link { display: grid; grid-template-columns: 1.1fr 1fr; }
  .card--featured .card__media {
    aspect-ratio: auto;
    height: 100%;
    border-bottom: 0;
    border-right: 1px solid var(--border);
  }
  .card--featured .card__body { padding: 2rem; align-self: center; }
  .card--featured .card__title { font-size: var(--step-2); }
  .card--featured .card__desc { font-size: var(--step-0); }
}

.card__link { display: block; height: 100%; }

.card__media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.card:hover .card__media img { transform: scale(1.05); }

.card__body { padding: 1.5rem; }

.card__meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-faint);
  margin-bottom: 0.6rem;
}
.card__dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
}

.card__title { font-size: var(--step-1); margin-bottom: 0.6rem; }

.card__desc {
  color: var(--text-muted);
  font-size: var(--step--1);
  margin-bottom: 1.1rem;
}

.card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.1rem;
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--accent-2);
}
.card__cta span { transition: transform 0.25s var(--ease); }
.card:hover .card__cta span { transform: translateX(4px); }

.grid__empty {
  padding: 3rem 0;
  text-align: center;
  color: var(--text-muted);
}

/* ─── About ─── */
.about {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}
.about__text p { color: var(--text-muted); max-width: 58ch; }
.about__subhead {
  font-size: var(--step-1);
  margin: 2.2rem 0 1rem;
}

.portrait {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.portrait img { width: 100%; aspect-ratio: 6 / 7; object-fit: cover; }

.facts { margin-top: 1.5rem; }
.facts > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}
.facts > div:last-child { border-bottom: 0; }
.facts dt { color: var(--text-faint); font-size: var(--step--1); }
.facts dd { margin: 0; font-weight: 600; font-size: var(--step--1); text-align: right; }

/* ─── Experience timeline ─── */
.timeline {
  position: relative;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border);
}
.timeline__item {
  /* Explicitly positioned so the dot below anchors to the item, not the rail.
     (.reveal's transform would otherwise make this containing block appear
     only mid-animation and the dots would jump.) */
  position: relative;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.5rem;
  padding-bottom: 2.75rem;
}
.timeline__item:last-child { padding-bottom: 0; }
/* The dot on the rail — pulled back over the 1.5rem padding to sit on it */
.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1.5rem - 5px);
  top: 0.55rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gradient);
}
.timeline__when {
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--text-faint);
  padding-top: 0.15rem;
}
.timeline__what h3 { font-size: var(--step-1); margin-bottom: 0.5rem; }
.timeline__at { color: var(--text-muted); font-weight: 500; }
.timeline__what p { color: var(--text-muted); font-size: var(--step--1); max-width: 60ch; }

/* ─── Contact ─── */
.contact { position: relative; text-align: center; }
.contact__inner { max-width: 700px; margin-inline: auto; }
.contact__title { font-size: var(--step-3); margin-bottom: 1.2rem; }
.contact__lede {
  color: var(--text-muted);
  font-size: var(--step-1);
  margin-bottom: 2.5rem;
}
.contact__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.8rem;
  margin-top: 2.5rem;
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--text-muted);
}
.contact__links a:hover { color: var(--text); }

/* ─── Footer ─── */
.footer {
  padding-block: 2.5rem;
  border-top: 1px solid var(--border);
  font-size: var(--step--1);
  color: var(--text-faint);
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
}
.footer p { margin: 0; }


/* ═══ 6. MOTION & RESPONSIVE ═══════════════════════════════════════════ */

/* Scroll reveal — JS adds .is-visible via IntersectionObserver */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* Stagger the hero's children so they cascade in */
.hero .reveal:nth-child(1) { transition-delay: 0.05s; }
.hero .reveal:nth-child(2) { transition-delay: 0.12s; }
.hero .reveal:nth-child(3) { transition-delay: 0.19s; }
.hero .reveal:nth-child(4) { transition-delay: 0.26s; }
.hero .reveal:nth-child(5) { transition-delay: 0.33s; }

@media (max-width: 800px) {
  .nav__burger { display: flex; }

  /* Mobile menu: full-width panel that drops below the bar */
  .nav__links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    margin: 0;
    padding: 0 var(--space);
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s var(--ease), padding 0.35s var(--ease);
  }
  .nav__links.is-open { max-height: 320px; padding-block: 0.5rem 1.5rem; }
  .nav__links a { width: 100%; padding: 0.85rem 0; font-size: var(--step-0); }
  .nav__links a::after { display: none; }
  .nav__resume { margin-top: 0.6rem; text-align: center; }

  .about { grid-template-columns: 1fr; }
  .about__side { max-width: 380px; }

  .timeline__item { grid-template-columns: 1fr; gap: 0.4rem; }
}

@media (max-width: 480px) {
  .grid { grid-template-columns: 1fr; }
  .hero__cta .btn { flex: 1 1 auto; }
  .hero__social { gap: 1.2rem; }
}

/* Respect people who ask for less animation */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* Print — collapse to a clean résumé-ish document */
@media print {
  .nav, .hero__glow, .filters, .footer, .btn { display: none; }
  body { background: #fff; color: #000; }
  .section { padding-block: 1.5rem; }
}