:root {
  --text: #222;
  --muted: #666;
  --faint: #888;
  --line: #e4e4e4;
  --bg: #fff;
  --soft: #f7f7f7;
  --link: #245f9e;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", Helvetica,
    Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

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

a:hover {
  text-decoration: underline;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 980px;
  margin: 0 auto;
  padding: 22px 24px 16px;
  border-bottom: 1px solid var(--line);
}

.site-title {
  color: var(--text);
  font-weight: 700;
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  font-size: 14px;
}

.topbar nav a {
  color: var(--muted);
}

.search-toggle {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
}

.search-toggle svg,
.search-field svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.search-toggle:hover {
  color: var(--link);
}

.page {
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 44px;
  align-items: start;
}

h1 {
  margin: 0 0 6px;
  font-size: 34px;
  line-height: 1.2;
}

.roleline {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
}

h2 {
  margin: 0 0 18px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
  font-size: 24px;
  line-height: 1.3;
}

h3 {
  margin: 0 0 4px;
  font-size: 18px;
  line-height: 1.35;
}

p {
  margin: 0 0 14px;
}

mark {
  border-radius: 3px;
  background: #eaf3fb;
  color: #1e5b91;
  padding: 1px 3px;
}

.subtitle {
  color: var(--muted);
  font-size: 17px;
}

.keywords {
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 18px;
}

.links span {
  color: var(--faint);
}

.profile-image {
  width: 190px;
  height: 190px;
  border-radius: 4px;
  object-fit: cover;
  object-position: 18% 58%;
}

.section {
  margin-top: 56px;
}

.recommender-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid #f0f0f0;
  padding: 18px 0;
}

.recommender-box p {
  color: var(--muted);
  margin-bottom: 0;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border: 1px solid var(--link);
  border-radius: 4px;
  color: var(--link);
  font-size: 14px;
  font-weight: 700;
  padding: 8px 14px;
  white-space: nowrap;
}

.button-link:hover {
  background: #f5f8fb;
  text-decoration: none;
}

.search-open {
  overflow: hidden;
}

.search-panel[hidden] {
  display: none;
}

.search-panel {
  position: fixed;
  inset: 0;
  z-index: 20;
}

.search-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.74);
  backdrop-filter: blur(2px);
}

.search-dialog {
  position: relative;
  max-width: 640px;
  margin: 88px auto 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 50px rgba(31, 61, 91, 0.16);
  overflow: hidden;
}

.search-field {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) 32px;
  gap: 10px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 12px 14px;
  color: var(--muted);
}

.search-field input {
  width: 100%;
  border: 0;
  outline: 0;
  color: var(--text);
  font: inherit;
}

.search-field button {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

.search-results {
  max-height: 420px;
  overflow: auto;
  padding: 6px;
}

.search-result {
  display: grid;
  gap: 2px;
  width: 100%;
  border: 0;
  border-radius: 5px;
  background: transparent;
  cursor: pointer;
  padding: 10px;
  text-align: left;
}

.search-result:hover {
  background: #f5f8fb;
}

.search-result strong {
  color: var(--text);
  font-size: 14px;
}

.search-result span,
.search-empty {
  color: var(--muted);
  font-size: 13px;
}

.search-empty {
  margin: 0;
  padding: 16px;
}

.section-note,
.meta {
  color: var(--muted);
}

.meta {
  margin-bottom: 12px;
  font-size: 14px;
}

.news-list,
.compact-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-list li,
.compact-list li {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 18px;
  padding: 7px 0;
  border-bottom: 1px solid #f0f0f0;
}

.news-link {
  color: var(--text);
  font-weight: 500;
}

.news-link::after {
  color: var(--link);
  content: " ↗";
  font-size: 12px;
  font-weight: 700;
}

.news-link:hover {
  color: var(--link);
  text-decoration: none;
}

time {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.timeline-meta {
  display: grid;
  gap: 10px;
  align-content: start;
}

.project-thumb {
  width: 112px;
  height: 74px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--soft);
  object-fit: contain;
  object-position: center;
}

.project-thumb.logo-thumb {
  border: 0;
  background: #fff;
  padding: 6px;
}

.logo-pair {
  display: grid;
  gap: 6px;
  width: 112px;
}

.logo-pair .project-thumb {
  height: 44px;
}

.project-thumb.placeholder {
  display: grid;
  place-items: center;
  color: var(--link);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.research-item {
  margin-bottom: 32px;
}

.research-with-logo {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.research-logo {
  width: 64px;
  height: 64px;
  border: 0;
  border-radius: 6px;
  background: #fff;
  object-fit: contain;
  object-position: center;
  padding: 6px;
}

.research-item ul {
  margin: 10px 0 16px;
  padding-left: 22px;
}

.research-item li {
  margin: 7px 0;
}

.timeline {
  position: relative;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.timeline::before {
  position: absolute;
  top: 5px;
  bottom: 5px;
  left: 171px;
  width: 1px;
  background: var(--line);
  content: "";
}

.timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 44px;
  padding: 0 0 26px;
}

.timeline > li::before {
  position: absolute;
  top: 5px;
  left: 166px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--link);
  border-radius: 50%;
  background: var(--bg);
  content: "";
}

.timeline > li.current::before {
  background: var(--link);
}

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

.timeline .tech {
  margin-top: 6px;
  color: var(--text);
  font-size: 14px;
}

.project-card {
  border-bottom: 1px solid #f0f0f0;
  padding-bottom: 18px;
}

.static-project {
  display: grid;
  gap: 10px;
}

.project-card summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}

.project-card summary::-webkit-details-marker {
  display: none;
}

.project-card summary::after {
  color: var(--faint);
  content: "+";
  font-size: 20px;
  line-height: 1.2;
}

.project-card[open] summary::after {
  content: "–";
}

.project-card small {
  color: var(--muted);
  display: block;
  font-size: 14px;
  margin-top: 3px;
}

.project-detail {
  margin-top: 14px;
}

.stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
  padding: 0;
  list-style: none;
}

.stack li {
  border: 0;
  border-left: 3px solid var(--link);
  border-radius: 0;
  background: #f5f8fb;
  color: #244a72;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  padding: 7px 10px;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 16px 0 4px;
  padding-top: 12px;
  border-top: 1px solid #f0f0f0;
  font-size: 14px;
}

.project-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  border: 1px solid #c8d8ec;
  border-radius: 5px;
  background: #fbfdff;
  color: var(--link);
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
  padding: 0 12px;
}

.project-links a::before {
  content: "GitHub";
  border-right: 1px solid #dbe7f4;
  color: #4f7398;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0;
  padding-right: 7px;
  text-transform: uppercase;
}

.project-links a:hover {
  border-color: var(--link);
  background: #f5f8fb;
  text-decoration: none;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 8px;
}

.gallery.single {
  grid-template-columns: minmax(0, 1fr);
}

.gallery img {
  display: block;
  width: 100%;
  height: 220px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fafafa;
  object-fit: contain;
  object-position: center;
}

.gallery.single img {
  height: auto;
  max-height: 420px;
}

.media-block {
  margin-top: 18px;
}

.media-block h4 {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.award-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.award-row {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr) 92px;
  align-items: start;
  gap: 18px;
  border: 0;
  border-bottom: 1px solid #f0f0f0;
  border-radius: 0;
  background: #fff;
  padding: 13px 0;
  box-shadow: none;
}

.award-row h3 {
  margin: 0;
  color: var(--text);
  font-size: 16px;
}

.award-main p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.award-row time {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  text-align: right;
}

.award-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  min-height: auto;
  border-radius: 0;
  background: transparent;
  color: var(--link);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.1;
  padding: 2px 0 0;
  text-align: left;
  text-transform: uppercase;
}

.award-badge small {
  margin-top: 3px;
  color: var(--faint);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.1;
  text-transform: none;
}

.award-row.featured {
  border-left: 0;
}

.award-row.featured .award-badge {
  color: var(--link);
}

.award-row.gold .award-badge,
.award-row.green .award-badge {
  color: var(--link);
}

.award-row.blue .award-badge,
.award-row.global .award-badge {
  color: var(--link);
}

.award-row.purple .award-badge {
  color: var(--link);
}

.award-row.cert .award-badge,
.award-row.silver .award-badge {
  color: var(--link);
}

.global-list {
  position: relative;
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.global-list::before {
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 15px;
  width: 1px;
  background: var(--line);
  content: "";
}

.global-list li {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.global-index {
  z-index: 1;
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid #c8d8ec;
  border-radius: 50%;
  background: #fff;
  color: var(--link);
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
}

.global-list li > div {
  display: flex;
  gap: 28px;
  align-items: center;
  justify-content: flex-start;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  padding: 14px 16px;
}

.global-copy {
  flex: 0 1 auto;
  min-width: 0;
  max-width: 650px;
}

.global-logo {
  display: block;
  flex: 0 0 auto;
  width: 96px;
  max-width: 100%;
  max-height: 74px;
  object-fit: contain;
}

.global-logo.seal {
  width: 76px;
  max-height: 76px;
}

.global-logo.wide {
  width: 138px;
}

.global-list h3 {
  margin: 0 0 3px;
  color: var(--text);
  font-size: 16px;
}

.global-list p {
  margin: 4px 0 0;
}

.global-list em {
  color: var(--link);
  font-style: italic;
  font-weight: 600;
}

.hobby-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.hobby-card {
  border: 1px solid #dce8f3;
  border-radius: 8px;
  background: linear-gradient(180deg, #fbfdff 0%, #fff 100%);
  box-shadow: 0 4px 14px rgba(31, 61, 91, 0.04);
  overflow: hidden;
}

.hobby-card summary {
  display: grid;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  padding: 14px 12px 12px;
}

.hobby-card summary::-webkit-details-marker {
  display: none;
}

.hobby-card img {
  width: 100%;
  height: 150px;
  border-radius: 0;
  background: transparent;
  object-fit: contain;
  object-position: center;
}

.hobby-card span {
  display: block;
  margin: 0;
  color: #142542;
  font-size: 16px;
  font-weight: 800;
  text-align: center;
}

.hobby-card p {
  margin: 0;
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 12px 14px 14px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.award-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.award-card {
  border: 1px solid var(--line);
  border-left: 4px solid #b8c7d8;
  border-radius: 6px;
  background: #fff;
  padding: 16px;
}

.award-card.highlight {
  border-left-color: var(--link);
  background: #fbfdff;
}

.award-date {
  display: block;
  margin-bottom: 8px;
  color: var(--faint);
  font-size: 13px;
  font-weight: 700;
}

.award-card h3 {
  margin-bottom: 5px;
}

.award-card p {
  color: var(--muted);
  margin-bottom: 8px;
}

.award-card strong {
  color: var(--text);
  font-size: 14px;
}

.skill-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 30px;
}

.skill-grid p {
  margin-bottom: 18px;
}

.interest-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.interest-list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 22px;
  padding: 18px 0;
  border-bottom: 1px solid #f0f0f0;
}

.interest-list span {
  color: var(--link);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

.interest-list h3 {
  margin-bottom: 6px;
  color: var(--text);
}

.interest-list p {
  max-width: 720px;
  color: var(--muted);
  font-size: 15px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  max-width: 980px;
  margin: 0 auto;
  padding: 22px 24px 36px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 760px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .topbar nav {
    justify-content: flex-start;
  }

  .search-toggle {
    position: absolute;
    top: 20px;
    right: 24px;
  }

  .page {
    padding-top: 32px;
  }

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

  .profile-image {
    order: -1;
    width: 150px;
    height: 150px;
  }

  .research-with-logo {
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 12px;
  }

  .research-logo {
    width: 48px;
    height: 48px;
  }

  .news-list li,
  .compact-list li,
  .timeline li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .timeline::before,
  .timeline > li::before {
    display: none;
  }

  .timeline-meta {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .project-thumb {
    width: 86px;
    height: 58px;
  }

  .logo-pair {
    width: 86px;
  }

  .logo-pair .project-thumb {
    height: 36px;
  }

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

  .gallery img {
    height: auto;
    max-height: 360px;
  }

  .award-row {
    grid-template-columns: 1fr;
    gap: 5px;
    padding: 12px 0;
  }

  .award-row h3 {
    font-size: 14px;
  }

  .award-row time {
    text-align: left;
  }

  .award-badge {
    min-height: 28px;
    font-size: 12px;
    align-items: flex-start;
  }

  .global-list li {
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 12px;
  }

  .global-list::before {
    left: 14px;
  }

  .global-index {
    width: 28px;
    height: 28px;
    font-size: 12px;
  }

  .global-list li > div {
    display: block;
  }

  .global-logo {
    margin-top: 4px;
  }

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

  .interest-list li {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 14px;
  }

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

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

  .recommender-box {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .button-link {
    justify-self: start;
  }

  .search-dialog {
    width: calc(100% - 32px);
    margin-top: 72px;
  }

  .footer {
    flex-direction: column;
  }
}