:root {
  --text: #2b2b2b;
  --muted: #66717c;
  --blue: #3d6288;
  --blue-dark: #294867;
  --blue-pale: #e8eff6;
  --line: #b8c2cc;
  --soft-line: #dce2e7;
  --page-width: 880px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: #f2f4f6;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Yu Gothic", sans-serif;
  font-size: 15px;
  line-height: 1.7;
}

a {
  color: #165a9b;
}

a:hover {
  color: #a04444;
}

.global-nav {
  width: min(var(--page-width), calc(100% - 24px));
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  margin: 20px auto 0;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--soft-line);
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
}

.site-name {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  color: #273746;
  font-weight: bold;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
}

.nav-links a {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  color: #334b61;
  border-left: 1px solid #e2e7eb;
  font-size: 0.85rem;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.active {
  color: var(--blue-dark);
  background: var(--blue-pale);
}

.hero {
  width: min(var(--page-width), calc(100% - 24px));
  margin: 0 auto;
  padding: 2.2rem 2rem;
  color: #fff;
  background: #365f86;
  border: 0;
}

.hero h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.75rem, 5vw, 2.35rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.hero-copy {
  margin: 0;
  color: #e2eaf1;
}

.hero-actions {
  display: flex;
  gap: 0.4rem;
  margin: 0.8rem 0 0;
  font-size: 0.9rem;
}

.hero-actions a {
  color: #fff;
}

.content {
  width: min(var(--page-width), calc(100% - 24px));
  margin: 0 auto 24px;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--soft-line);
  border-top: 0;
  border-radius: 0 0 8px 8px;
  box-shadow: 0 8px 24px rgba(38, 57, 74, 0.06);
}

.home-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 28px;
  align-items: start;
}

.projects-section {
  grid-column: 1;
  grid-row: 1;
}

.about-section {
  grid-column: 2;
  grid-row: 1;
}

.skills-section {
  grid-column: 1 / -1;
  grid-row: 2;
}

.section {
  min-width: 0;
  margin: 0;
}

.section-heading,
.category-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
  margin: 0 0 14px;
  padding: 0 0 0.45rem;
  color: var(--text);
  background: transparent;
  border: 0;
  border-bottom: 2px solid #6f8eab;
}

.section-heading h2,
.category-heading h2 {
  margin: 0;
  font-size: 1.15rem;
}

.heading-with-link a {
  color: var(--blue);
  font-size: 0.85rem;
}

.about-grid {
  display: block;
}

.card {
  padding: 0.85rem 0.9rem;
  background: #f8fafb;
  border: 1px solid var(--soft-line);
  border-radius: 5px;
}

.social-card {
  margin-top: 10px;
}

.social-card h3 {
  margin: 0 0 0.4rem;
  padding-bottom: 0.2rem;
  color: var(--blue-dark);
  border-bottom: 1px dotted var(--line);
  font-size: 0.9rem;
}

.skills-card {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.profile-list {
  margin: 0;
}

.profile-item {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: 0.65rem;
  align-items: start;
  padding: 0.4rem 0;
}

.profile-item + .profile-item {
  border-top: 1px dotted var(--line);
}

.profile-item dt {
  padding-top: 0.15rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
}

.profile-item dd {
  min-width: 0;
  margin: 0;
}

.profile-sub {
  display: block;
  margin-top: 0.1rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.tech-group h3 {
  margin: 0 0 0.4rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
}

.tag-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  min-width: 0;
  min-height: 66px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 0.15rem;
  padding: 0.5rem 0.2rem;
  background: #fff;
  border: 1px solid var(--soft-line);
  border-radius: 4px;
  font-size: 0.72rem;
  text-align: center;
}

.tag-list img {
  width: 25px;
  height: 25px;
  object-fit: contain;
}

.tag-list small {
  color: var(--muted);
  font-size: 0.65rem;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.social-links a {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid var(--soft-line);
  border-radius: 5px;
}

.social-links a:hover {
  background: var(--blue-pale);
  border-color: #9fb0c0;
}

.social-links img {
  width: 19px;
  height: 19px;
}

.brand-disclaimer {
  max-width: 720px;
  margin: 0 auto 0.65rem;
  color: var(--muted);
  font-size: 0.62rem;
  line-height: 1.6;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.project-grid {
  display: grid;
  gap: 12px;
}

.project-card {
  background: #fff;
  border: 1px solid var(--soft-line);
  border-radius: 5px;
  overflow: hidden;
}

.project-card h3 {
  margin: 0;
  padding: 0.5rem 0.75rem;
  color: var(--blue-dark);
  background: #f3f6f9;
  border-bottom: 1px solid var(--soft-line);
  font-size: 1rem;
}

.project-card p {
  margin: 0;
  padding: 0.65rem 0.65rem 0.3rem;
}

.project-card .card-link {
  display: inline-block;
  margin: 0 0.65rem 0.7rem;
  font-size: 0.85rem;
}

.project-number {
  display: none;
}

.eyebrow,
.project-category {
  color: var(--muted);
  font-size: 0.72rem;
}

.page-header {
  margin: 0 0 20px;
  padding: 0 0 1rem;
  border-bottom: 1px dotted var(--line);
}

.page-header h1 {
  margin: 0.15rem 0 0.4rem;
  color: var(--blue-dark);
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  line-height: 1.35;
}

.page-header p {
  margin: 0.4rem 0;
}

.category-heading {
  justify-content: flex-start;
  gap: 0.5rem;
  margin-top: 28px;
}

.category-heading span {
  font-size: 0.75rem;
}

.tool,
.memo {
  margin-bottom: 14px;
  padding: 1rem 1.1rem;
  background: #fff;
  border: 1px solid var(--soft-line);
  border-radius: 5px;
}

.tool h2,
.memo h2 {
  margin: 0 0 0.45rem;
  padding-bottom: 0.3rem;
  color: var(--blue-dark);
  border-bottom: 1px dotted var(--line);
  font-size: 1.15rem;
}

.tool h2 small {
  color: var(--muted);
  font-size: 0.75em;
  font-weight: normal;
}

.tool > p {
  max-width: 680px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.button,
.github-button,
.info-button {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.65rem;
  color: #214b72;
  background: #eef3f7;
  border: 1px solid #9eafbe;
  border-radius: 3px;
  font-size: 0.82rem;
  text-decoration: none;
}

.button:hover,
.github-button:hover,
.info-button:hover {
  color: #fff;
  background: var(--blue);
}

.github-button img,
.info-button img {
  width: 16px;
  height: 16px;
  object-fit: contain;
}

.status-label {
  padding: 0.25rem 0.5rem;
  color: #765c12;
  background: #fff8d8;
  border: 1px solid #dccd83;
  font-size: 0.82rem;
}

.memo time {
  color: var(--muted);
  font-size: 0.78rem;
}

.empty-note {
  padding: 0.7rem;
  color: var(--muted);
  text-align: center;
  border: 1px dashed var(--line);
}

.blog-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

.rss-link {
  flex: 0 0 auto;
  font-size: 0.85rem;
}

.blog-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 0.8rem;
  margin-bottom: 0.8rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--soft-line);
}

.blog-controls-label {
  color: var(--muted);
  font-size: 0.78rem;
}

.blog-tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.blog-tag-filter button {
  padding: 0.3rem 0.65rem;
  color: var(--blue-dark);
  background: #fff;
  border: 1px solid #b9c4ce;
  border-radius: 999px;
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
}

.blog-tag-filter button:hover,
.blog-tag-filter button:focus-visible,
.blog-tag-filter button.active {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.blog-result-count {
  margin: 0 0 0.6rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.blog-list {
  display: grid;
  gap: 0.8rem;
}

.blog-card {
  padding: 1.1rem 1.2rem;
  background: #fff;
  border: 1px solid var(--soft-line);
  border-radius: 5px;
}

.blog-card[hidden] {
  display: none;
}

.blog-card h2 {
  margin: 0.35rem 0;
  font-size: 1.25rem;
}

.blog-card h2 a {
  color: var(--blue-dark);
}

.blog-card > p {
  margin: 0.4rem 0 0.7rem;
}

.blog-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.blog-tag {
  padding: 0.08rem 0.4rem;
  color: var(--blue-dark);
  background: var(--blue-pale);
  border-radius: 3px;
}

.read-more {
  font-size: 0.85rem;
}

.blog-empty {
  padding: 2rem 1rem;
  color: var(--muted);
  text-align: center;
  border: 1px dashed var(--line);
}

.blog-post {
  max-width: 720px;
  margin: 0 auto;
}

.blog-post-header {
  margin-bottom: 2rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--soft-line);
}

.blog-post-header h1 {
  margin: 0.5rem 0 0;
  color: var(--blue-dark);
  font-size: clamp(1.7rem, 5vw, 2.3rem);
  line-height: 1.45;
}

.blog-post-body {
  font-size: 1rem;
  line-height: 1.9;
}

.blog-post-body p {
  margin: 0 0 1.4rem;
}

.blog-post-body h2 {
  margin: 2.2rem 0 0.8rem;
  padding-bottom: 0.35rem;
  color: var(--blue-dark);
  border-bottom: 1px solid var(--soft-line);
  font-size: 1.3rem;
}

.blog-post-body ul {
  margin: 0 0 1.5rem;
  padding-left: 1.4rem;
}

.blog-post-body li + li {
  margin-top: 0.4rem;
}

.post-navigation {
  max-width: 720px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  margin: 2.5rem auto 0;
  padding-top: 1rem;
  border-top: 1px solid var(--soft-line);
}

.command {
  margin: 1rem 0;
  padding: 0.7rem 0.85rem;
  background: #f4f6f8;
  border: 1px solid #d1d8de;
}

.command h3 {
  margin: 0 0 0.4rem;
  color: var(--blue-dark);
  font-family: Consolas, monospace;
  font-size: 0.95rem;
}

code {
  padding: 0.1rem 0.25rem;
  color: #333;
  background: #e5e8eb;
  border: 1px solid #d3d6d9;
  font-family: Consolas, monospace;
  font-size: 0.9em;
}

.content .tool .img img {
  display: block;
  width: min(100%, 680px);
  height: auto;
  margin-top: 0.75rem;
  border: 1px solid var(--line);
}

.notice {
  padding: 0.6rem 0.75rem;
  color: #5d4a11;
  background: #fff9dd;
  border: 1px solid #d9ca7f;
}

footer {
  width: min(var(--page-width), calc(100% - 24px));
  margin: 0 auto 24px;
  padding: 0.85rem;
  color: #53616d;
  background: transparent;
  border: 0;
  font-size: 0.78rem;
  text-align: center;
}

@media (max-width: 640px) {
  .global-nav {
    display: block;
    margin-top: 12px;
  }

  .site-name {
    border-bottom: 1px solid #b6c4d0;
  }

  .nav-links a:first-child {
    border-left: 0;
  }

  .hero {
    padding: 1.35rem 1rem;
  }

  .content {
    padding: 12px;
  }

  .blog-header {
    align-items: start;
  }

  .home-content {
    display: flex;
    flex-direction: column;
  }

  .projects-section,
  .about-section,
  .skills-section {
    width: 100%;
  }

  .projects-section {
    order: 1;
  }

  .about-section {
    order: 2;
  }

  .skills-section {
    order: 3;
  }

  .skills-card {
    grid-template-columns: 1fr;
  }

  .tech-group + .tech-group {
    margin-top: 0.5rem;
  }
}

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