:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --text: #000000;
  --muted: #555555;
  --link: #337ab7;
  --link-hover: #2e6da4;
  --border: #dddddd;
  --card-shadow: none;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

a {
  color: var(--link);
  text-decoration: underline;
}

a:hover {
  opacity: 0.85;
}

.site {
  max-width: 1040px;
  margin: 0 auto;
  padding: 2.5rem 1.75rem 4rem;
}

/* Intro (home) */
.intro {
  margin-bottom: 2rem;
}

.intro-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.intro-header h1 {
  font-family: inherit;
  font-size: 2.5rem;
  font-weight: 500;
  margin: 0 0 0.35rem;
  line-height: 1.15;
  color: var(--text);
}

.intro-header .email {
  margin: 0;
  font-size: 1rem;
  color: var(--text);
}

.intro-header .email a {
  color: var(--link);
  text-decoration: underline;
}

.intro-body {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2rem;
  align-items: start;
}

.profile-photo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  text-align: center;
  width: 220px;
}

.profile-photo {
  width: 220px;
  height: 220px;
  object-fit: cover;
  border-radius: 18px;
  border: none;
  box-shadow: none;
  background: var(--surface);
}

.profile-nav-piped {
  font-size: 0.88rem;
  line-height: 1.35;
  width: 100%;
}

.profile-nav-piped p {
  margin: 0;
  color: var(--text);
}

.profile-nav-piped a {
  color: var(--link);
  text-decoration: none;
  white-space: nowrap;
}

.profile-nav-piped a:hover {
  text-decoration: underline;
}

.x-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  background: #000000;
  color: #ffffff;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  text-decoration: none;
  width: fit-content;
  margin-top: 0.15rem;
}

.x-button:hover {
  background: #333333;
  color: #ffffff;
  text-decoration: none;
}

.x-button svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
}

.bio {
  margin-bottom: 0;
  text-align: justify;
  text-justify: inter-word;
  font-size: 1rem;
  line-height: 1.7;
}

.bio p {
  margin: 0 0 1rem;
  color: var(--text);
}

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

.bio a {
  color: var(--link);
  text-decoration: none;
}

.bio a:hover {
  text-decoration: underline;
}

/* Page header (subpages) */
.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-family: inherit;
  font-size: 2.1rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  line-height: 1.2;
  color: var(--text);
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--text);
  display: inline-block;
}

.back-link {
  margin: 0.5rem 0 0;
  font-size: 0.92rem;
  font-weight: 600;
}

.back-link a {
  color: var(--link);
  text-decoration: none;
}

.back-link a:hover {
  text-decoration: underline;
}

.section-intro {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 640px;
}

/* Navigation */
.section-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  padding: 0.85rem 0;
  margin-bottom: 2rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
  font-weight: 500;
}

.section-nav a {
  color: var(--link);
  text-decoration: none;
}

.section-nav a:hover,
.section-nav a.active {
  text-decoration: underline;
}

/* Sections */
section {
  margin-bottom: 3rem;
}

h2 {
  font-family: inherit;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 1.25rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--text);
  display: inline-block;
}

h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
  color: var(--text);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 1.25rem;
  box-shadow: none;
}

.project-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--text);
  font-weight: 600;
}

.project-card p {
  margin: 0.4rem 0;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
}

.project-card a {
  color: var(--link);
  text-decoration: none;
}

.project-card a:hover {
  text-decoration: underline;
}

.project-card img,
.project-video {
  width: 100%;
  height: auto;
  border-radius: 0;
  margin-top: 0.85rem;
  display: block;
}

.project-video {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: 50% 70%;
}

/* Publications */
.publication-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 1.15rem 1.25rem;
  margin-bottom: 0.85rem;
  box-shadow: none;
}

.publication-card .year {
  color: var(--text);
  font-weight: 700;
  font-size: 0.82rem;
  margin-bottom: 0.35rem;
}

.publication-card .title {
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
  line-height: 1.5;
}

.publication-card .title a {
  color: var(--link);
  text-decoration: none;
}

.publication-card .title a:hover {
  text-decoration: underline;
}

.publication-card .journal {
  color: var(--muted);
  font-size: 0.85rem;
  font-style: italic;
  line-height: 1.5;
}

.pub-list p,
.list-block li {
  margin: 0.5rem 0;
  font-size: 0.95rem;
  color: var(--text);
}

.pub-list a,
.list-block a {
  color: var(--link);
  text-decoration: none;
}

.pub-list a:hover,
.list-block a:hover {
  text-decoration: underline;
}

.list-block {
  margin: 0;
  padding-left: 1.25rem;
}

.list-block ul {
  margin: 0.25rem 0 0.75rem;
  padding-left: 1.25rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.more-link {
  margin-top: 1rem;
  font-size: 0.92rem;
  font-weight: 600;
}

.more-link a {
  color: var(--link);
  text-decoration: none;
}

.more-link a:hover {
  text-decoration: underline;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem 2rem;
  max-width: 640px;
}

.skill-item {
  margin-bottom: 0.25rem;
}

.skill-label {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text);
}

.skill-bar {
  background: #eeeeee;
  border-radius: 0;
  height: 8px;
  overflow: hidden;
}

.skill-level {
  height: 100%;
  background: #000000;
  border-radius: 0;
}

/* Competitions */
.competitions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.competition-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 1.25rem;
  box-shadow: none;
}

.competition-card .header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.competition-card .title {
  color: var(--text);
  font-weight: 600;
  font-size: 1rem;
}

.competition-card .date {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.competition-card .organizer {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 0.65rem;
}

.competition-card .achievement {
  background: #f5f5f5;
  border-left: 3px solid #000000;
  padding: 0.5rem 0.85rem;
  margin: 0.65rem 0;
  font-size: 0.88rem;
  color: var(--text);
}

.competition-card .description {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.competition-card .description ul {
  margin: 0;
  padding-left: 1.2rem;
}

.competition-card .description li {
  margin-bottom: 0.35rem;
  color: var(--muted);
}

.competition-card .images {
  margin-top: 1rem;
  column-count: 2;
  column-gap: 0.5rem;
}

.competition-card .images img {
  width: 100%;
  height: auto;
  border-radius: 0;
  display: block;
  margin-bottom: 0.5rem;
  border: 1px solid var(--border);
}

.competition-card .images.single {
  column-count: 1;
}

/* Contact */
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

.contact-list li {
  font-size: 0.95rem;
}

.contact-list a {
  color: var(--link);
  text-decoration: none;
}

.contact-list a:hover {
  text-decoration: underline;
}

@media (max-width: 760px) {
  .intro-body {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .profile-photo-wrap {
    align-items: center;
    text-align: center;
  }

  .x-button {
    margin: 0 auto;
  }

  .intro-header h1,
  .page-header h1 {
    font-size: 1.9rem;
  }

  .projects-grid,
  .skills-grid,
  .competitions-grid {
    grid-template-columns: 1fr;
  }

  .profile-photo {
    width: 180px;
    height: 180px;
  }
}