/* ============================================================
   Dr. Pooya Eini — Personal Academic Site
   ============================================================ */

:root {
  --bg: #0b1420;
  --bg-tint: #0f1c2c;
  --surface: #121f30;
  --ink: #eaf0f7;
  --ink-soft: #a9b7c8;
  --ink-faint: #78899e;
  --line: #223247;
  --navy: #0a1f36;
  --navy-deep: #06121f;
  --accent: #2fc4c4;
  --accent-bright: #46dede;
  --accent-soft: #10333a;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, .45);
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1120px;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--sans);
  background: transparent;
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ---------- SCROLL-SCRUBBED BACKGROUND ---------- */
.bg-canvas {
  position: fixed; inset: 0; z-index: -1;
  width: 100vw; height: 100vh;
  background: var(--navy-deep);
}
.page { position: relative; z-index: 1; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--navy); color: #fff; padding: .6rem 1rem; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- NAV ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--maxw); margin: 0 auto; padding: .85rem 1.5rem;
  display: flex; align-items: center; gap: 1.5rem;
}
.nav__brand { display: flex; align-items: center; gap: .6rem; color: var(--ink); font-weight: 600; }
.nav__brand:hover { text-decoration: none; }
.nav__brand-mark {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--navy); color: var(--accent-bright);
  font-family: var(--serif); font-weight: 700; font-size: .95rem; letter-spacing: .5px;
}
.nav__brand-text { font-size: 1rem; letter-spacing: -.01em; }
.nav__links { margin-left: auto; display: flex; gap: 1.6rem; }
.nav__links a {
  color: var(--ink-soft); font-weight: 500; font-size: .92rem;
  position: relative; padding: .2rem 0;
}
.nav__links a:hover { color: var(--ink); text-decoration: none; }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--accent); transition: width .25s ease;
}
.nav__links a:hover::after { width: 100%; }

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .8rem 1.5rem; border-radius: 999px; font-weight: 600; font-size: .95rem;
  cursor: pointer; border: 1.5px solid transparent; transition: all .22s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: #fff; box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 38%, transparent); }
.btn--primary:hover { background: var(--accent-bright); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--lg { padding: 1rem 2rem; font-size: 1.05rem; }

/* ---------- HERO ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, color-mix(in srgb, var(--navy-deep) 78%, transparent), color-mix(in srgb, var(--navy) 68%, transparent) 55%, color-mix(in srgb, #113a5c 55%, transparent));
  color: #eef4fb;
  padding: clamp(4rem, 10vw, 7rem) 1.5rem clamp(3rem, 7vw, 5rem);
}
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(600px 320px at 82% 12%, color-mix(in srgb, var(--accent-bright) 30%, transparent), transparent 70%),
    radial-gradient(520px 300px at 8% 92%, rgba(41, 130, 190, .3), transparent 70%);
  opacity: .9;
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(80% 80% at 50% 30%, #000, transparent 90%);
}
.hero__inner {
  position: relative; max-width: var(--maxw); margin: 0 auto;
  display: grid; grid-template-columns: 1.55fr .85fr; gap: clamp(2rem, 5vw, 4rem); align-items: center;
}
.hero__content { min-width: 0; }

/* Hero portrait */
.hero__portrait { display: flex; flex-direction: column; align-items: center; gap: .9rem; }
.hero__portrait-frame {
  position: relative; width: min(320px, 72vw); aspect-ratio: 1; border-radius: 24px;
  padding: 6px; background: linear-gradient(150deg, var(--accent-bright), transparent 55%, rgba(255,255,255,.25));
  box-shadow: 0 24px 60px rgba(0,0,0,.45); animation: floaty 6s ease-in-out infinite;
}
.hero__portrait-frame::before {
  content: ""; position: absolute; inset: -14px; border-radius: 30px; z-index: -1;
  background: radial-gradient(circle at 50% 40%, color-mix(in srgb, var(--accent-bright) 45%, transparent), transparent 70%);
  filter: blur(6px);
}
.hero__portrait-frame img {
  width: 100%; height: 100%; object-fit: cover; border-radius: 19px; display: block;
  border: 1px solid rgba(255,255,255,.14);
}
.hero__portrait-cap {
  font-family: var(--serif); font-style: italic; color: #cfe0f0; font-size: .95rem; letter-spacing: .01em;
}
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@media (prefers-reduced-motion: reduce) { .hero__portrait-frame { animation: none; } }
.hero__eyebrow {
  text-transform: uppercase; letter-spacing: .22em; font-size: .78rem; font-weight: 600;
  color: var(--accent-bright); margin-bottom: 1rem;
}
.hero__name {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(2.8rem, 8vw, 5.2rem); line-height: 1.02; letter-spacing: -.02em;
}
.hero__md { color: var(--accent-bright); font-weight: 400; }
.hero__title {
  font-family: var(--serif); font-weight: 500; font-style: italic;
  font-size: clamp(1.25rem, 3.4vw, 1.9rem); color: #cfe0f0; margin-top: .5rem;
}
.hero__lede {
  max-width: 62ch; margin-top: 1.6rem; font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: #b9cadd; line-height: 1.75;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2.2rem; }
.hero .btn--ghost { color: #eef4fb; border-color: rgba(255,255,255,.28); }
.hero .btn--ghost:hover { border-color: var(--accent-bright); color: var(--accent-bright); }

.hero__stats {
  list-style: none; display: flex; flex-wrap: wrap; gap: clamp(1.5rem, 5vw, 3.5rem);
  margin-top: 3rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,.14);
}
.hero__stats li { display: flex; flex-direction: column; }
.stat__num {
  font-family: var(--serif); font-weight: 600; font-size: clamp(2rem, 5vw, 2.9rem);
  line-height: 1; color: #fff;
}
.stat__label { font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; color: #9fb4c9; margin-top: .45rem; }
.hero__stats-note { margin-top: 1rem; font-size: .78rem; color: #7f96ad; }

/* ---------- SECTIONS ---------- */
.section {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 6rem) 1.5rem;
  background: color-mix(in srgb, var(--bg) 65%, transparent);
  backdrop-filter: blur(3px);
}
.section--tint { max-width: none; background: color-mix(in srgb, var(--bg-tint) 65%, transparent); backdrop-filter: blur(3px); border-block: 1px solid var(--line); }
.section--tint > * { max-width: var(--maxw); margin-inline: auto; }
.section__head { margin-bottom: 2.8rem; }
.section__kicker {
  display: inline-block; text-transform: uppercase; letter-spacing: .18em;
  font-size: .76rem; font-weight: 600; color: var(--accent); margin-bottom: .7rem;
}
.section__title {
  font-family: var(--serif); font-weight: 600; letter-spacing: -.02em;
  font-size: clamp(1.9rem, 4.5vw, 2.8rem);
}
.section__sub { margin-top: .9rem; color: var(--ink-soft); max-width: 66ch; }

/* ---------- ABOUT ---------- */
.about { display: grid; grid-template-columns: 1.6fr 1fr; gap: 2.5rem; align-items: start; }
.about__body p { color: var(--ink-soft); font-size: 1.06rem; margin-bottom: 1.1rem; }
.about__body strong { color: var(--ink); font-weight: 600; }
.about__meta { margin-top: 1.8rem; display: grid; gap: 1.1rem; }
.about__meta-item { display: grid; gap: .15rem; }
.about__meta-label {
  font-size: .74rem; text-transform: uppercase; letter-spacing: .12em;
  color: var(--accent); font-weight: 600;
}
.about__meta-value { color: var(--ink); font-weight: 500; }

.about__card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.8rem; box-shadow: var(--shadow-sm); position: sticky; top: 90px;
}
.about__photo { margin: -.4rem 0 1.3rem; border-radius: var(--radius-sm); overflow: hidden; aspect-ratio: 4/3; }
.about__photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.about__card-title { font-family: var(--serif); font-size: 1.15rem; margin-bottom: 1.1rem; }
.taglist { list-style: none; display: flex; flex-wrap: wrap; gap: .5rem; }
.taglist li {
  font-size: .84rem; font-weight: 500; padding: .4rem .8rem; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent-bright); border: 1px solid transparent;
}

/* ---------- CARDS ---------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.3rem; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.card__media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--navy-deep); }
.card__media img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform .5s ease; filter: saturate(1.05);
}
.card:hover .card__media img { transform: scale(1.06); }
.card__media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, color-mix(in srgb, var(--surface) 70%, transparent), transparent 45%);
}
.card__body { padding: 1.4rem 1.5rem 1.7rem; }
.card__title { font-family: var(--serif); font-size: 1.22rem; margin-bottom: .5rem; }
.card__text { color: var(--ink-soft); font-size: .95rem; }

/* ---------- PUBLICATIONS ---------- */
.pubfilter { display: flex; flex-wrap: wrap; gap: .6rem; margin-bottom: 2rem; }
.pubfilter__btn {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-soft);
  padding: .5rem 1.1rem; border-radius: 999px; font-family: var(--sans);
  font-size: .88rem; font-weight: 500; cursor: pointer; transition: all .2s ease;
}
.pubfilter__btn:hover { border-color: var(--accent); color: var(--accent); }
.pubfilter__btn.is-active { background: var(--accent); color: #fff; border-color: var(--accent); }

.pubs { list-style: none; counter-reset: pub; display: grid; gap: .2rem; }
.pub {
  display: grid; grid-template-columns: 84px 1fr; gap: 1rem; align-items: baseline;
  padding: 1.3rem 1rem; border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--line); transition: background .2s ease, transform .2s ease;
}
.pub:hover { background: var(--surface); transform: translateX(4px); box-shadow: var(--shadow-sm); }
.pub.is-hidden { display: none; }
.pub__year {
  font-family: var(--serif); font-weight: 600; font-size: 1.05rem; color: var(--accent);
}
.pub__title { font-size: 1.06rem; font-weight: 600; line-height: 1.4; letter-spacing: -.01em; }
.pub__meta { margin-top: .4rem; color: var(--ink-faint); font-size: .9rem; }
.pub__venue { color: var(--ink-soft); font-style: italic; font-weight: 500; }
.pub__cite {
  display: inline-block; background: var(--accent-soft); color: var(--accent-bright);
  padding: .05rem .55rem; border-radius: 999px; font-size: .8rem; font-weight: 600;
}

.pubs__more { margin-top: 2rem; }

.underreview {
  margin-top: 3rem; background: var(--surface); border: 1px solid var(--line);
  border-left: 4px solid var(--accent); border-radius: var(--radius);
  padding: 1.8rem 2rem; box-shadow: var(--shadow-sm);
}
.underreview__title { font-family: var(--serif); font-size: 1.2rem; margin-bottom: 1rem; }
.underreview ul { list-style: none; display: grid; gap: .8rem; }
.underreview li { padding-left: 1.5rem; position: relative; color: var(--ink-soft); }
.underreview li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); }

/* ---------- TIMELINE ---------- */
.timeline { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.timeline__heading { font-family: var(--serif); font-size: 1.3rem; margin-bottom: 1.5rem; }
.timeline__heading--sp { margin-top: 2.5rem; }
.tl { position: relative; padding-left: 1.6rem; }
.tl::before { content: ""; position: absolute; left: 5px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.tl__item { position: relative; padding-bottom: 1.8rem; }
.tl__item:last-child { padding-bottom: 0; }
.tl__dot {
  position: absolute; left: -1.6rem; top: 5px; width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--bg-tint); box-shadow: 0 0 0 1px var(--accent);
}
.tl__date { font-size: .8rem; font-weight: 600; letter-spacing: .05em; color: var(--accent); text-transform: uppercase; }
.tl__role { font-size: 1.08rem; margin-top: .2rem; }
.tl__org { color: var(--ink-soft); font-size: .95rem; }

.training { list-style: none; display: grid; gap: .75rem; }
.training li {
  display: flex; flex-direction: column; padding: .8rem 1rem; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
}
.training li span { font-weight: 500; font-size: .95rem; }
.training li em { color: var(--ink-faint); font-size: .82rem; font-style: normal; margin-top: .1rem; }

/* ---------- CONTACT ---------- */
.section--contact {
  background: linear-gradient(160deg, color-mix(in srgb, var(--navy-deep) 60%, transparent), color-mix(in srgb, var(--navy) 52%, transparent) 60%, color-mix(in srgb, #113a5c 40%, transparent));
  backdrop-filter: blur(3px);
  color: #eef4fb; max-width: none; margin-top: 0;
}
.contact { max-width: var(--maxw); margin: 0 auto; text-align: center; }
.contact .section__kicker { color: var(--accent-bright); }
.contact__title { font-family: var(--serif); font-weight: 600; font-size: clamp(2rem, 5vw, 3rem); }
.contact__lede { max-width: 56ch; margin: 1rem auto 2rem; color: #b9cadd; font-size: 1.08rem; }
.contact__links { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.8rem; margin-top: 2.5rem; }
.contact__links a { color: #cfe0f0; font-weight: 500; position: relative; }
.contact__links a:hover { color: var(--accent-bright); text-decoration: none; }
.contact__links a::after { content: "↗"; font-size: .7em; margin-left: .25rem; opacity: .6; }

/* ---------- FOOTER ---------- */
.footer { background: var(--navy-deep); color: #8ea3ba; }
.footer__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 1.6rem 1.5rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem;
  font-size: .88rem;
}

/* ---------- REVEAL ANIMATION ---------- */
.section, .pub, .card { --rv: 1; }
@media (prefers-reduced-motion: no-preference) {
  [data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
  [data-reveal].is-visible { opacity: 1; transform: none; }
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 940px) {
  .about { grid-template-columns: 1fr; }
  .about__card { position: static; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: 1fr; gap: 2.5rem; }
}
@media (max-width: 780px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero__portrait { order: -1; }
  .hero__content { min-width: 0; }
  .hero__lede { margin-inline: auto; }
  .hero__actions { justify-content: center; }
  .hero__stats { justify-content: center; }
  .hero__stats li { align-items: center; }
}
@media (max-width: 620px) {
  .nav__links { display: none; }
  .cards { grid-template-columns: 1fr; }
  .pub { grid-template-columns: 1fr; gap: .3rem; }
  .pub__year { font-size: .95rem; }
  .footer__inner { flex-direction: column; }
}