/* =============================================================
   Tasmiah Haque — Portfolio
   Palette: deep ink navy + warm rose/coral accent
   ============================================================= */

:root {
  /* Light theme (default) */
  --bg: #f7f5f2;
  --bg-elev: #ffffff;
  --bg-soft: #efece7;
  --ink: #14213a;
  --ink-soft: #46506a;
  --ink-faint: #8a91a6;
  --line: #e3ded7;
  --accent: #c15b6b; /* dusty rose */
  --accent-2: #1e3a5f; /* deep slate blue */
  --accent-soft: #f2dfe1;
  --ring: rgba(193, 91, 107, 0.35);
  --shadow: 0 18px 40px -22px rgba(20, 33, 58, 0.35);
  --shadow-sm: 0 8px 24px -18px rgba(20, 33, 58, 0.4);
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1120px;
  --nav-h: 68px;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
}

:root[data-theme="dark"] {
  --bg: #0c1424;
  --bg-elev: #121c30;
  --bg-soft: #16223a;
  --ink: #eef1f7;
  --ink-soft: #aeb7cc;
  --ink-faint: #6d7791;
  --line: #22304b;
  --accent: #e08595;
  --accent-2: #7fa8d6;
  --accent-soft: #2a2130;
  --ring: rgba(224, 133, 149, 0.4);
  --shadow: 0 24px 50px -24px rgba(0, 0, 0, 0.7);
  --shadow-sm: 0 10px 28px -18px rgba(0, 0, 0, 0.7);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

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

img {
  max-width: 100%;
  display: block;
}

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 200;
  transition: width 0.1s linear;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--line);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  height: 100%;
  padding: 0 clamp(1.2rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: 0.5px;
}
.nav__brand span {
  color: var(--accent);
}
.nav__links {
  display: flex;
  gap: 2rem;
}
.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  transition: color 0.25s ease;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.25s ease;
}
.nav__links a:hover,
.nav__links a.active {
  color: var(--ink);
}
.nav__links a:hover::after,
.nav__links a.active::after {
  width: 100%;
}
.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  cursor: pointer;
  font-size: 1.1rem;
  display: grid;
  place-items: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.theme-toggle:hover {
  transform: rotate(20deg);
  border-color: var(--accent);
}
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav__burger span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: 0.3s ease;
}
.nav__burger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__burger.open span:nth-child(2) {
  opacity: 0;
}
.nav__burger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 3rem) clamp(1.2rem, 4vw, 2.5rem) 2rem;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  animation: float 16s ease-in-out infinite;
}
.blob--1 {
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, var(--accent), transparent 70%);
  top: -120px;
  right: -80px;
}
.blob--2 {
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, var(--accent-2), transparent 70%);
  bottom: -140px;
  left: -100px;
  animation-delay: -6s;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%);
  opacity: 0.4;
}
@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(20px, -30px) scale(1.08);
  }
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1.3fr 0.85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  flex: 1;
}
.hero__eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.hero__name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.8rem, 7vw, 5rem);
  line-height: 1.02;
  letter-spacing: -1px;
}
.hero__tagline {
  margin-top: 1.4rem;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--ink-soft);
  max-width: 34ch;
}
.hero__cta {
  margin-top: 2.2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.btn {
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.85rem 1.6rem;
  border-radius: 100px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease,
    background 0.25s ease, color 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 12px 26px -12px var(--ring);
}
.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 32px -12px var(--ring);
}
.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}
.hero__socials {
  margin-top: 2rem;
  display: flex;
  gap: 1.4rem;
  flex-wrap: wrap;
}
.hero__socials a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.hero__socials a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.hero__portrait {
  display: flex;
  justify-content: center;
}
.portrait-frame {
  position: relative;
  width: clamp(220px, 26vw, 330px);
  aspect-ratio: 1;
}
.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1;
  animation: morph 12s ease-in-out infinite;
}
.portrait-ring {
  position: absolute;
  inset: -14px;
  border: 2px dashed var(--accent);
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  opacity: 0.5;
  animation: morph 12s ease-in-out infinite reverse, spin 40s linear infinite;
}
@keyframes morph {
  0%,
  100% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }
  50% {
    border-radius: 70% 30% 40% 60% / 60% 40% 60% 40%;
  }
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.hero__stats {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 2.5rem auto 0;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat {
  flex: 1 1 0;
  min-width: 180px;
  background: var(--bg-elev);
  padding: 1.4rem 1.2rem;
  text-align: center;
}
.stat__value {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}
.stat__label {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--ink-soft);
  letter-spacing: 0.3px;
}

/* ---------- Sections ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 7rem) clamp(1.2rem, 4vw, 2.5rem);
}
.section__head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2.8rem;
}
.section__index {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--accent);
  font-weight: 600;
}
.section__title {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 4.5vw, 2.9rem);
  font-weight: 600;
  letter-spacing: -0.5px;
}
.subhead {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 1.4rem;
}

/* ---------- About ---------- */
.about {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
}
.about__lead p {
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  line-height: 1.7;
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 400;
}
.about__side {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  align-self: start;
}
.about__side-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 1rem;
}
.about__interests {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin-bottom: 1.4rem;
}
.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.chips li {
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: 100px;
  background: var(--accent-soft);
  color: var(--accent-2);
  border: 1px solid transparent;
}
:root[data-theme="dark"] .chips li {
  color: var(--accent);
}

/* ---------- Research grid ---------- */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.4rem;
}
.rcard {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.rcard::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.rcard:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: transparent;
}
.rcard:hover::before {
  transform: scaleX(1);
}
.rcard__venue {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--accent);
  text-transform: uppercase;
}
.rcard__period {
  float: right;
  font-size: 0.75rem;
  color: var(--ink-faint);
}
.rcard__title {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0.6rem 0 0.8rem;
  line-height: 1.3;
}
.rcard__desc {
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.rcard__tags {
  margin-top: 1.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.rcard__tags span {
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.3rem 0.7rem;
  border-radius: 100px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
}

/* ---------- Publications ---------- */
.pub-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2rem;
}
.pub-filters button {
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.5rem 1.1rem;
  border-radius: 100px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: 0.25s ease;
}
.pub-filters button:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.pub-filters button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.pub-list {
  list-style: none;
  counter-reset: pub;
}
.pub {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.4rem;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.pub:last-child {
  border-bottom: 1px solid var(--line);
}
.pub__num {
  font-family: var(--serif);
  font-size: 1.3rem;
  color: var(--accent);
  font-weight: 600;
}
.pub__type {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent-2);
  margin-bottom: 0.6rem;
}
:root[data-theme="dark"] .pub__type {
  color: var(--accent);
}
.pub__title {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 0.4rem;
}
.pub__authors {
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.pub__venue {
  font-size: 0.88rem;
  color: var(--ink-faint);
  font-style: italic;
  margin-top: 0.2rem;
}
.pub__year {
  color: var(--accent);
  font-style: normal;
  font-weight: 600;
}
.pub.hide {
  display: none;
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--line);
}
.tl-item {
  position: relative;
  padding: 0 0 2.2rem 1.6rem;
}
.tl-item:last-child {
  padding-bottom: 0;
}
.tl-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--accent);
  transform: translateX(0);
}
.tl-head {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: baseline;
}
.tl-role {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
}
.tl-period {
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 600;
  white-space: nowrap;
}
.tl-org {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin: 0.2rem 0 0.5rem;
}
.tl-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  color: var(--ink-faint);
  margin-bottom: 0.6rem;
}
.tl-points {
  list-style: none;
}
.tl-points li {
  font-size: 0.92rem;
  color: var(--ink-soft);
  padding-left: 1.2rem;
  position: relative;
  margin-bottom: 0.4rem;
}
.tl-points li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent);
}
.tl-note {
  font-size: 0.9rem;
  color: var(--ink-soft);
  font-style: italic;
}

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.4rem;
}
.skill-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.6rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}
.skill-card h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin-bottom: 1rem;
}
.skill-card ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.skill-card li {
  font-size: 0.85rem;
  padding: 0.4rem 0.8rem;
  background: var(--bg-soft);
  border-radius: 8px;
  color: var(--ink);
}

/* ---------- Two column (teaching/awards) ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(2rem, 5vw, 4rem);
}
.teach-item,
.award-item {
  padding: 1.2rem 0;
  border-top: 1px solid var(--line);
}
.teach-item:first-child,
.award-item:first-child {
  border-top: none;
}
.teach-item h4 {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
}
.teach-item .meta {
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 600;
  margin: 0.15rem 0 0.5rem;
}
.teach-item p {
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.teach-points {
  margin: 0.3rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.teach-points li {
  margin: 0.3rem 0;
}
.teach-points strong {
  color: var(--ink);
  font-weight: 600;
}
.subhead--spaced {
  margin-top: 2.2rem;
}
.award-item {
  display: flex;
  gap: 1rem;
  align-items: baseline;
}
.award-item .yr {
  white-space: nowrap;
  font-family: var(--serif);
  font-weight: 600;
  color: var(--accent);
}
.award-item h4 {
  font-size: 1rem;
  font-weight: 600;
}
.award-item span.org {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* ---------- Contact ---------- */
.section--contact {
  text-align: center;
}
.contact {
  max-width: 640px;
  margin: 0 auto;
}
.contact .section__index {
  display: block;
  margin-bottom: 0.5rem;
}
.contact__title {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.5px;
}
.contact__lead {
  margin: 1.2rem auto 2.4rem;
  color: var(--ink-soft);
  font-size: 1.1rem;
  max-width: 46ch;
}
.contact__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ---------- Footer ---------- */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem clamp(1.2rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.footer__top {
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 1rem;
  }
  .hero__portrait {
    order: -1;
  }
  .hero__tagline {
    margin-left: auto;
    margin-right: auto;
  }
  .hero__cta,
  .hero__socials {
    justify-content: center;
  }
  .hero__stats {
    grid-template-columns: 1fr;
  }
  .about,
  .two-col {
    grid-template-columns: 1fr;
  }
  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    background: var(--bg-elev);
    padding: 1.5rem clamp(1.2rem, 4vw, 2.5rem);
    gap: 1.2rem;
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    transition: transform 0.35s ease;
    box-shadow: var(--shadow);
  }
  .nav__links.open {
    transform: translateY(0);
  }
  .nav__burger {
    display: flex;
  }
}
@media (max-width: 460px) {
  .pub {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}