:root {
  --bg: #f5f7f8;
  --surface: #ffffff;
  --surface-muted: #f8fafb;
  --text: #162127;
  --muted: #4f5f67;
  --line: #d8e0e5;
  --accent-strong: #113841;
  --accent-soft: #edf5f6;
  --warm: #9c5a35;
  --shadow: 0 8px 24px rgba(18, 34, 42, 0.05);
  --radius-lg: 20px;
  --radius-md: 14px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--text);
  background: var(--bg);
}

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

p,
li {
  line-height: 1.66;
}

.page-shell {
  position: relative;
}

.site-header,
main,
.site-footer {
  position: relative;
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  padding: 0.95rem 0;
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(245, 247, 248, 0.97);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.85rem;
  height: 2.85rem;
  border-radius: 16px;
  background: var(--accent-strong);
  color: #fff;
  font-family: "Sora", sans-serif;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.brand-copy strong,
.site-nav a,
.eyebrow,
.card-label,
.mini-card span,
.project-tag,
.entry-date,
.experience-group-title,
.cv-link,
.lang-option {
  font-family: "Sora", sans-serif;
}

.brand-copy strong {
  font-size: 1rem;
}

.brand-copy span {
  color: var(--muted);
  font-size: 0.9rem;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.9rem 1rem;
  flex-wrap: wrap;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.site-nav a {
  position: relative;
  font-size: 0.86rem;
  color: var(--muted);
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.28rem;
  width: 100%;
  height: 2px;
  background: var(--warm);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

.utility-links {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.cv-link,
.lang-option {
  font-size: 0.84rem;
}

.cv-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.48rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--accent-strong);
  font-weight: 700;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.15rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.lang-option {
  padding: 0.38rem 0.72rem;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 700;
}

.lang-option.is-current {
  background: var(--accent-strong);
  color: #fff;
}

.section {
  padding: 3rem 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 1.2rem;
  padding-top: 2.7rem;
  align-items: start;
}

.hero-copy h1,
.section-heading h2,
.contact-card h2 {
  margin: 0;
  font-family: "Sora", sans-serif;
}

.hero-copy h1 {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  font-size: clamp(2.55rem, 5.3vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.hero-copy h1 span {
  max-width: 16ch;
  font-size: clamp(1.15rem, 1.95vw, 1.68rem);
  line-height: 1.34;
  letter-spacing: -0.02em;
  color: #32434b;
}

.eyebrow {
  margin: 0 0 0.62rem;
  font-size: 0.82rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--warm);
}

.hero-lead {
  margin: 0.95rem 0 0;
  max-width: 44rem;
  font-size: 1.02rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.25rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.18rem;
  border-radius: 999px;
  font-weight: 700;
  transition:
    transform 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease;
}

.button:hover,
.cv-link:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent-strong);
  color: #fff;
}

.button-secondary {
  background: var(--surface);
  border: 1px solid var(--line);
}

.hero-panel {
  display: grid;
  gap: 0.65rem;
}

.hero-card,
.focus-card,
.entry-card,
.project-card,
.skill-card,
.contact-card,
.mini-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 1.15rem 1.2rem;
  border-radius: var(--radius-lg);
}

.hero-card-accent {
  background: linear-gradient(180deg, #f7fbfc 0%, #eef5f7 100%);
  border-color: #cedae0;
}

.card-label {
  margin: 0 0 0.5rem;
  color: var(--warm);
  font-size: 0.85rem;
  font-weight: 700;
}

.hero-card h2 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.35rem, 2.7vw, 1.82rem);
}

.hero-card-meta,
.hero-card-note {
  margin: 0;
}

.hero-card-meta {
  color: var(--accent-strong);
  font-weight: 700;
}

.hero-card-note {
  margin-top: 0.42rem;
  color: var(--muted);
}

.hero-mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.mini-card {
  padding: 0.82rem 0.95rem;
  border-radius: var(--radius-md);
}

.mini-card span {
  display: block;
  margin-bottom: 0.38rem;
  color: var(--warm);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.mini-card strong {
  display: block;
  font-size: 0.95rem;
  line-height: 1.62;
}

.two-column {
  display: grid;
  grid-template-columns: 0.66fr 1.34fr;
  gap: 1.1rem;
  align-items: start;
}

.section-heading h2 {
  font-size: clamp(1.72rem, 2.8vw, 2.42rem);
  letter-spacing: -0.04em;
}

.section-body p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.section-body p + p {
  margin-top: 0.7rem;
}

.focus-grid,
.project-grid,
.skills-grid,
.experience-columns {
  display: grid;
  gap: 0.75rem;
}

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

.focus-card {
  padding: 1.02rem 1.08rem;
  border-radius: var(--radius-lg);
}

.focus-index {
  display: inline-flex;
  margin-bottom: 0.65rem;
  padding: 0.33rem 0.68rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-family: "Sora", sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
}

.focus-card h3,
.entry-card h4,
.project-card h3,
.skill-card h3 {
  margin: 0 0 0.48rem;
  font-size: 1.1rem;
}

.focus-card p,
.entry-card p,
.project-card p,
.skill-card li,
.contact-card p {
  margin: 0;
  color: var(--muted);
}

.experience-columns {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.experience-group {
  display: grid;
  gap: 0.75rem;
}

.experience-group-title {
  margin: 0;
  font-size: 1.08rem;
}

.entry-card {
  padding: 1rem 1.05rem;
  border-radius: var(--radius-lg);
}

.entry-date {
  margin-bottom: 0.35rem;
  color: var(--warm);
  font-size: 0.88rem;
  font-weight: 700;
}

.entry-meta {
  margin-bottom: 0.45rem !important;
  color: var(--accent-strong) !important;
  font-weight: 700;
}

.project-grid {
  grid-template-columns: 1fr;
}

.project-card {
  padding: 1.05rem 1.1rem;
  border-radius: var(--radius-lg);
}

.featured-card {
  background: var(--surface-muted);
}

.project-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
}

.project-tag {
  display: inline-flex;
  padding: 0.32rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-strong);
}

.project-year {
  color: var(--warm);
  font-family: "Sora", sans-serif;
  font-weight: 700;
}

.publication-ref {
  margin-top: 0.7rem !important;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
  font-size: 0.94rem;
}

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

.skill-card {
  padding: 1rem 1.05rem;
  border-radius: var(--radius-lg);
}

.skill-card ul {
  margin: 0;
  padding-left: 1.08rem;
}

.contact-section {
  padding-bottom: 3.4rem;
}

.contact-card {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.15rem;
  padding: 1.45rem 1.5rem;
  border-radius: 22px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.55rem;
}

.contact-links a {
  font-family: "Sora", sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent-strong);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 0 1.5rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.35s ease,
    transform 0.35s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1100px) {
  .hero,
  .two-column,
  .focus-grid,
  .skills-grid,
  .experience-columns {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 860px) {
  .site-header,
  .header-actions,
  .site-nav,
  .contact-card,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    gap: 0.7rem;
  }

  .utility-links {
    width: 100%;
    justify-content: flex-start;
  }

  .hero-mini-grid {
    grid-template-columns: 1fr;
  }

  .contact-links {
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .site-header,
  main,
  .site-footer {
    width: min(calc(100% - 1.2rem), var(--max-width));
  }

  .section {
    padding: 2.55rem 0;
  }

  .hero {
    padding-top: 2.2rem;
  }

  .hero-copy h1 {
    font-size: clamp(2.1rem, 12vw, 3.2rem);
  }

  .button {
    width: 100%;
  }

  .contact-links a {
    font-size: 0.94rem;
    word-break: break-word;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .button,
  .cv-link,
  .site-nav a::after {
    transition: none;
  }
}