:root {
  --bg: #0d1113;
  --bg-alt: #141b1f;
  --card: #182126;
  --card-strong: #202b31;
  --text: #f5f8f9;
  --muted: #a8b6bc;
  --border: rgba(245, 248, 249, 0.14);
  --accent: #80c9e5;
  --accent-ink: #0d171b;
  --accent-soft: rgba(128, 201, 229, 0.14);
  --shadow: 0 14px 32px rgba(0, 0, 0, 0.2);
  color-scheme: dark;
}

body[data-theme="light"] {
  --bg: #f7fbfc;
  --bg-alt: #edf6f8;
  --card: #ffffff;
  --card-strong: #eff8fa;
  --text: #101518;
  --muted: #5e6b71;
  --border: rgba(16, 21, 24, 0.12);
  --accent: #57afd0;
  --accent-ink: #071216;
  --accent-soft: rgba(87, 175, 208, 0.13);
  --shadow: 0 14px 32px rgba(20, 54, 66, 0.08);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

button,
a {
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

button:focus-visible,
a:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--accent);
}

.site-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding-bottom: 3rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--border);
}

body[data-theme="light"] .site-header {
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.95rem;
}

.brand__mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.8rem;
  object-fit: contain;
  display: block;
  filter: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.3rem;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.theme-toggle,
.menu-toggle {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 999px;
  width: 2.8rem;
  height: 2.8rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: var(--shadow);
}

.theme-toggle:hover,
.menu-toggle:hover {
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: currentColor;
  margin: 0.18rem 0;
  border-radius: 999px;
}

.section {
  padding: 5rem 0;
  scroll-margin-top: 90px;
}

.hero {
  min-height: 88vh;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: center;
  padding-top: 3rem;
}

.error-page {
  min-height: 80vh;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: center;
  padding-top: 3rem;
}

.error-page__lead {
  font-size: clamp(1.04rem, 2vw, 1.3rem);
  color: var(--muted);
  margin-bottom: 1rem;
  max-width: 560px;
}

.error-page__art {
  position: relative;
  min-height: 380px;
  border-radius: 2rem;
  background: var(--card-strong);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.hero__location {
  color: var(--muted);
  margin-bottom: 1rem;
  font-weight: 500;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.3rem, 4vw, 4.2rem);
  line-height: 1.06;
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero__lead {
  font-size: clamp(1.04rem, 2vw, 1.3rem);
  color: var(--text);
  margin-bottom: 1rem;
  max-width: 650px;
}

.hero__description,
.about__text p,
.timeline__content p,
.research__text p,
.contact__card p,
.education-card p,
.project-card p,
.interest-card p,
.skill-group li {
  color: var(--muted);
}

.hero__actions,
.contact__actions,
.project-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.contact__actions {
  justify-content: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.button--primary {
  background: var(--accent);
  border: none;
  color: var(--accent-ink);
}

.button--ghost {
  background: var(--card);
}

.whatsapp-number {
  display: none;
}

.whatsapp-number.is-visible {
  display: inline-flex;
}

.button--icon {
  background: var(--card-strong);
}

.hero__art {
  position: relative;
  min-height: 420px;
  border-radius: 2rem;
  background: var(--card-strong);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(10px);
  opacity: 0.8;
  animation: drift 10s ease-in-out infinite alternate;
}

.orb--one {
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(128, 201, 229, 0.16), transparent 70%);
  top: 2rem;
  right: 3rem;
}

.orb--two {
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(128, 201, 229, 0.1), transparent 70%);
  bottom: -2rem;
  left: -1rem;
}

.grid-card {
  position: absolute;
  inset: 1.6rem;
  border: 1px solid var(--border);
  border-radius: 1.4rem;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(12px);
}

.grid-card__inner {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  padding: 1.4rem;
  height: 100%;
}

.grid-card__inner span {
  display: grid;
  place-items: center;
  border-radius: 1rem;
  border: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--card);
}

.section-heading {
  max-width: 750px;
  margin-bottom: 2rem;
}

.about__content {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 2rem;
  align-items: stretch;
}

.about__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.about__text p {
  margin-bottom: 1rem;
}

.about__stats {
  display: grid;
  gap: 1rem;
  align-content: center;
}

.about__stats article,
.timeline__content,
.research__hero,
.project-card,
.skill-group,
.education-card,
.contact__card,
.interest-card {
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  border-radius: 1.4rem;
  padding: 1.4rem;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.about__stats article {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 108px;
}

.about__stats article:hover,
.timeline__content:hover,
.research__hero:hover,
.project-card:hover,
.skill-group:hover,
.education-card:hover,
.contact__card:hover,
.interest-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.about__stats h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.about__stats p {
  margin: 0;
  color: var(--muted);
}

.timeline {
  display: grid;
  gap: 1.25rem;
}

.timeline__item {
  display: grid;
  grid-template-columns: 1.2rem 1fr;
  gap: 1rem;
  align-items: start;
}

.timeline__marker {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 0.35rem;
  box-shadow: 0 0 0 6px var(--accent-soft);
}

.timeline__role {
  font-weight: 700;
  margin-bottom: 0.25rem;
  color: var(--text);
}

.timeline__meta {
  color: var(--accent);
  margin-bottom: 0.6rem;
  font-size: 0.95rem;
}

.research__hero {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.research__stack {
  display: grid;
  gap: 1.25rem;
}

.research__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text);
}

.research__publications {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin: 2rem 0 1.5rem;
}

.publication-group {
  padding: 1.3rem 1.2rem;
  border-radius: 1.1rem;
  background: var(--card-strong);
  border: 1px solid var(--border);
}

.publication-group h3 {
  margin: 0 0 1rem;
  font-size: 1.04rem;
  color: var(--text);
  font-weight: 700;
  text-transform: none;
}

.publication-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.publication-list li {
  padding: 1rem;
  border-radius: 0.9rem;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: none;
  position: relative;
  overflow: hidden;
}

.publication-list li::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--accent);
}

.publication-item__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}

.publication-item__header strong {
  color: var(--text);
  font-size: 1.08rem;
}

.publication-item__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.publication-item__role,
.publication-item__status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
}

.publication-item__role {
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border);
}

.publication-item__status {
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border);
}

.publication-item__status--accepted {
  background: var(--card-strong);
  border-color: var(--border);
  color: var(--text);
}

.publication-list p,
.publication-list em {
  margin: 0.25rem 0 0;
  display: block;
  color: var(--muted);
  line-height: 1.6;
}

.publication-list p {
  color: var(--muted);
}

.publication-list em {
  color: var(--text);
  font-style: normal;
  font-weight: 600;
}

.publication-item__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.75rem;
}

.publication-list a,
.publication-list .abstract-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  font: inherit;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  cursor: pointer;
}

.publication-list a:hover,
.publication-list .abstract-trigger:hover {
  text-decoration: none;
  background: var(--card-strong);
}

.publication-list a.button--primary {
  padding: 0.9rem 1.2rem;
  color: var(--accent-ink);
  font-weight: 600;
  background: var(--accent);
  border: none;
}

.publication-list a.button--primary:hover {
  background: var(--accent);
}

.research__pillars {
  display: grid;
  gap: 0.8rem;
}

.research__pillars div {
  padding: 0.95rem 1rem;
  border-radius: 1rem;
  background: var(--card-strong);
  border: 1px solid var(--border);
  color: var(--muted);
}

.abstract-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.abstract-modal.is-open {
  display: flex;
}

.abstract-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(6, 10, 12, 0.6);
  backdrop-filter: blur(4px);
}

body[data-theme="light"] .abstract-modal__backdrop {
  background: rgba(16, 21, 24, 0.35);
}

.abstract-modal__dialog {
  position: relative;
  width: min(680px, 100%);
  max-height: min(80vh, 720px);
  overflow-y: auto;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-radius: 1.4rem;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transform: translateY(16px) scale(0.98);
  transition: opacity 220ms ease, transform 220ms ease;
}

.abstract-modal.is-open .abstract-modal__dialog {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.abstract-modal__dialog h3 {
  font-size: 1.3rem;
  line-height: 1.35;
  padding-right: 2rem;
}

.abstract-modal__body p {
  color: var(--muted);
  margin-bottom: 1rem;
}

.abstract-modal__body p:last-child {
  margin-bottom: 0;
}

.abstract-modal__keywords {
  font-size: 0.9rem;
  font-style: italic;
}

.abstract-modal__keywords strong {
  color: var(--text);
  font-style: normal;
}

.abstract-modal__close {
  position: absolute;
  top: 1.1rem;
  right: 1.1rem;
  width: 2.2rem;
  height: 2.2rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card-strong);
  color: var(--text);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
}

.abstract-modal__close:hover {
  background: var(--accent);
  color: var(--accent-ink);
}

@media (max-width: 600px) {
  .abstract-modal {
    padding: 1rem;
  }

  .abstract-modal__dialog {
    max-height: 85vh;
  }
}

.interest-grid,
.project-grid,
.skills__grid {
  display: grid;
  gap: 1.25rem;
}

.interest-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
}

.project-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.skills__grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.project-card__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.project-card__top span {
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.13em;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1rem 0 1.2rem;
}

.project-card__tags span {
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--text);
  font-size: 0.83rem;
}

.skill-group ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  padding: 0;
  margin: 0;
}

.skill-group li {
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  background: var(--card-strong);
  border: 1px solid var(--border);
}

.education-card {
  max-width: 780px;
}

.education-card__school {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.82rem;
  margin-bottom: 0.6rem;
}

.contact__card {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 2rem 0 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer div {
  display: flex;
  gap: 1rem;
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 550ms ease, transform 550ms ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes drift {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(6px, -10px, 0);
  }
}

@media (max-width: 940px) {
  .hero,
  .error-page,
  .about__content,
  .research__hero,
  .project-grid,
  .skills__grid,
  .interest-grid {
    grid-template-columns: 1fr;
  }

  .hero__art,
  .error-page__art {
    min-height: 320px;
  }
}

@media (max-width: 760px) {
  .site-header {
    flex-wrap: wrap;
  }

  .menu-toggle {
    display: inline-grid;
  }

  .site-nav {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    display: none;
    position: absolute;
    top: calc(100% + 0.65rem);
    left: 0;
    right: 0;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 1rem;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav .theme-toggle {
    margin-top: 0.35rem;
  }

  .section {
    padding: 4rem 0;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .research__publications {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
  }

  .publication-group {
    padding: 1rem;
    border-radius: 1rem;
  }

  .publication-group h3 {
    font-size: 0.98rem;
    line-height: 1.4;
  }

  .publication-list {
    gap: 0.8rem;
  }

  .publication-list li {
    padding: 0.9rem 0.85rem 0.9rem 1rem;
  }

  .publication-item__header {
    display: block;
  }

  .publication-item__header strong {
    display: block;
    font-size: 1rem;
    line-height: 1.45;
  }

  .publication-item__meta {
    margin-top: 0.75rem;
  }

  .publication-list p,
  .publication-list em {
    font-size: 0.92rem;
    line-height: 1.5;
  }

  .publication-item__actions a {
    min-height: 2.25rem;
  }
}

@media (max-width: 480px) {
  .site-shell {
    width: min(100% - 1.2rem, 1180px);
  }

  .hero {
    min-height: auto;
    padding-top: 1.5rem;
  }

  .error-page {
    min-height: auto;
    padding-top: 1.5rem;
  }

  h1 {
    font-size: 2.2rem;
  }

  .hero__actions,
  .contact__actions {
    flex-direction: column;
    align-items: center;
  }

  .button {
    width: 100%;
  }

  .contact__actions .button {
    width: min(100%, 14rem);
  }
}

@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;
    scroll-behavior: auto !important;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}