@layer base, layout, components, utilities;

@layer base {
  :root {
    color-scheme: light;
    --bg: #f7f9fc;
    --surface: #ffffff;
    --surface-soft: #f1f6f5;
    --surface-warm: #fff8ed;
    --ink: #1f2933;
    --muted: #667085;
    --line: #d9e2ec;
    --line-strong: #b8c4d2;
    --accent: #0f766e;
    --accent-strong: #115e59;
    --accent-soft: #e6f4f1;
    --warn: #b45309;
    --rose: #be123c;
    --green: #15803d;
    --blue: #2563eb;
    --shadow: 0 14px 34px rgb(31 41 51 / 0.08);
    --radius: 8px;
    --radius-sm: 6px;
    --content: 68rem;
    --article: 48rem;
  }

  :where(*, *::before, *::after) {
    box-sizing: border-box;
  }

  html {
    background: var(--bg);
  }

  body {
    margin: 0;
    color: var(--ink);
    background: var(--bg);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
    font-size: 1rem;
    line-height: 1.85;
    letter-spacing: 0;
    overflow-wrap: break-word;
  }

  a {
    color: var(--accent-strong);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.18em;
  }

  a:hover {
    color: var(--accent);
  }

  a:focus-visible,
  button:focus-visible,
  input:focus-visible {
    outline: 3px solid color-mix(in oklab, var(--accent) 60%, white);
    outline-offset: 3px;
  }

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

  h1,
  h2,
  h3 {
    line-height: 1.35;
    letter-spacing: 0;
    text-wrap: balance;
  }

  h1 {
    margin-block-end: 0.65em;
    font-size: 2rem;
  }

  h2 {
    margin-block: 2.3em 0.75em;
    font-size: 1.28rem;
  }

  h3 {
    margin-block-end: 0.4em;
    font-size: 1.05rem;
  }

  p {
    margin-block-end: 1em;
    text-wrap: pretty;
  }

  ul,
  ol,
  dl {
    margin-block: 0;
  }

  button,
  input {
    font: inherit;
  }
}

@layer layout {
  .container {
    inline-size: min(100% - 2rem, var(--content));
    margin-inline: auto;
  }

  .site-header {
    border-block-end: 1px solid var(--line);
    background: rgb(255 255 255 / 0.96);
  }

  .header-inner {
    display: grid;
    grid-template-columns: minmax(14rem, 1fr) minmax(18rem, 28rem);
    gap: 0.9rem 1.25rem;
    align-items: center;
    padding-block: 1rem;
  }

  .brand-block {
    min-inline-size: 0;
  }

  main.container {
    inline-size: min(100% - 2rem, var(--article));
    padding-block: 2rem 4.5rem;
  }

  .site-footer {
    border-block-start: 1px solid var(--line);
    background: #ffffff;
  }

  .footer-inner {
    display: grid;
    grid-template-columns: minmax(14rem, 1fr) minmax(16rem, 28rem);
    gap: 1rem 1.5rem;
    padding-block: 1.5rem;
  }

  @media (max-width: 760px) {
    .container,
    main.container {
      inline-size: min(100% - 1.25rem, var(--content));
    }

    .header-inner,
    .footer-inner {
      grid-template-columns: 1fr;
    }

    main.container {
      padding-block-start: 1.5rem;
    }

    h1 {
      font-size: 1.72rem;
    }

    h2 {
      font-size: 1.18rem;
    }
  }
}

@layer components {
  .site-logo {
    display: inline-flex;
    align-items: center;
    color: var(--ink);
    font-size: 1.2rem;
    font-weight: 800;
    line-height: 1.25;
    text-decoration: none;
  }

  .site-logo:hover {
    color: var(--accent-strong);
    text-decoration: none;
  }

  .site-tagline {
    margin-block: 0.25rem 0;
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.55;
  }

  .site-nav,
  .footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    grid-column: 1 / -1;
  }

  .site-nav a,
  .footer-nav a,
  .home-actions a {
    display: inline-flex;
    min-block-size: 2rem;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 0.28rem 0.65rem;
    background: var(--surface);
    color: var(--ink);
    font-size: 0.86rem;
    line-height: 1.35;
    text-decoration: none;
  }

  .site-nav a:hover,
  .footer-nav a:hover,
  .home-actions a:hover {
    border-color: var(--accent);
    color: var(--accent-strong);
    text-decoration: none;
  }

  .footer-nav {
    grid-column: auto;
    justify-content: flex-start;
  }

  .footer-title {
    margin-block-end: 0.25rem;
    font-weight: 800;
  }

  .footer-note,
  .muted,
  .term-updated,
  .section-note {
    color: var(--muted);
  }

  .footer-note,
  .term-updated,
  .section-note {
    font-size: 0.88rem;
    line-height: 1.65;
  }

  .site-search {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.45rem;
    inline-size: 100%;
  }

  .site-search input {
    min-inline-size: 0;
    min-block-size: 2.75rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    padding: 0.62rem 0.75rem;
    background: var(--surface);
    color: var(--ink);
  }

  .site-search input::placeholder {
    color: #7d8897;
  }

  .site-search button {
    min-block-size: 2.75rem;
    border: 1px solid var(--accent-strong);
    border-radius: var(--radius-sm);
    padding-inline: 1rem;
    background: var(--accent-strong);
    color: #ffffff;
    cursor: pointer;
  }

  .site-search button:hover {
    background: var(--accent);
  }

  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    align-items: center;
    margin-block-end: 1.1rem;
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1.55;
  }

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

  .breadcrumb .sep {
    color: #9aa5b1;
  }

  .home-hero,
  .term-head,
  .term-conclusion,
  .compare-summary {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .home-hero {
    padding: 1.5rem;
  }

  .home-kicker,
  .term-conclusion-label {
    margin-block-end: 0.45rem;
    color: var(--accent-strong);
    font-size: 0.82rem;
    font-weight: 800;
  }

  .home-lead {
    max-inline-size: 42rem;
    color: #344054;
    font-size: 1.03rem;
  }

  .home-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-block-start: 1rem;
  }

  .home-block,
  .term-section,
  .category,
  .comparison,
  .search-page {
    margin-block-start: 1.75rem;
  }

  .home-block h2,
  .term-section h2,
  .search-page h1,
  .category h1,
  .comparison h1 {
    position: relative;
  }

  .home-block h2::before,
  .term-section h2::before {
    content: "";
    display: inline-block;
    inline-size: 0.45rem;
    block-size: 1.25em;
    margin-inline-end: 0.55rem;
    border-radius: 999px;
    background: var(--accent);
    vertical-align: -0.22em;
  }

  .term-head {
    padding: 1.25rem 1.35rem;
  }

  .term-title-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem 1rem;
    align-items: flex-start;
    justify-content: space-between;
  }

  .term-title {
    margin-block-end: 0.2rem;
    font-size: 2.35rem;
    overflow-wrap: anywhere;
  }

  .term-reading {
    margin-block: 0.25rem 0;
    color: var(--muted);
    font-size: 0.95rem;
  }

  .term-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    align-items: center;
    padding-block-start: 0.25rem;
  }

  .badge,
  .tone-tag {
    display: inline-flex;
    justify-self: start;
    min-block-size: 1.7rem;
    align-items: center;
    border-radius: 999px;
    padding: 0.16rem 0.62rem;
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.35;
  }

  .badge {
    color: #ffffff;
  }

  .badge-stable {
    background: var(--green);
  }

  .badge-sns {
    background: var(--blue);
  }

  .badge-trend {
    background: var(--warn);
  }

  .badge-caution {
    background: var(--rose);
  }

  .tone-tag {
    border: 1px solid var(--line);
    background: var(--surface-soft);
    color: var(--accent-strong);
  }

  .term-conclusion,
  .compare-summary {
    margin-block: 1rem 1.35rem;
    padding: 1.15rem 1.25rem;
    background: var(--surface-soft);
  }

  .term-conclusion p:last-child,
  .compare-summary p:last-child {
    margin-block-end: 0;
  }

  .term-section {
    border-block-start: 1px solid var(--line);
    padding-block-start: 0.15rem;
  }

  .term-section p {
    color: #344054;
  }

  .info-list {
    display: grid;
    grid-template-columns: minmax(6rem, 10rem) 1fr;
    gap: 0.5rem 1rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1rem;
    background: var(--surface);
  }

  .info-list dt {
    color: var(--muted);
    font-weight: 700;
  }

  .info-list dd {
    margin: 0;
  }

  .example-list,
  .link-list,
  .term-grid,
  .category-list,
  .compare-list {
    list-style: none;
    padding: 0;
  }

  .example-list {
    display: grid;
    gap: 0.65rem;
  }

  .example-list li {
    display: grid;
    gap: 0.15rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.9rem 1rem;
    background: var(--surface);
  }

  .ex-en {
    color: var(--ink);
    font-weight: 800;
    line-height: 1.55;
    overflow-wrap: anywhere;
  }

  .ex-ja {
    color: #344054;
    line-height: 1.65;
  }

  .ex-note {
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1.55;
  }

  .link-list,
  .category-list,
  .compare-list {
    display: grid;
    gap: 0.55rem;
  }

  .link-list li,
  .category-list li,
  .compare-list li {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
  }

  .link-list a,
  .category-list a,
  .compare-list a {
    display: block;
    padding: 0.72rem 0.85rem;
    color: var(--ink);
    text-decoration: none;
  }

  .link-list a:hover,
  .category-list a:hover,
  .compare-list a:hover {
    color: var(--accent-strong);
    text-decoration: none;
  }

  .term-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
    gap: 0.75rem;
  }

  .term-card a {
    display: grid;
    gap: 0.45rem;
    block-size: 100%;
    min-block-size: 9rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.95rem;
    background: var(--surface);
    color: var(--ink);
    text-decoration: none;
  }

  .term-card a:hover {
    border-color: var(--accent);
    box-shadow: 0 10px 22px rgb(31 41 51 / 0.08);
    text-decoration: none;
  }

  .card-term {
    font-size: 1.16rem;
    font-weight: 850;
    line-height: 1.35;
    overflow-wrap: anywhere;
  }

  .card-reading {
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 700;
    line-height: 1.45;
  }

  .card-meaning {
    color: var(--muted);
    font-size: 0.86rem;
    line-height: 1.65;
  }

  .category-intro {
    color: #344054;
  }

  .compare-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
  }

  .compare-table th,
  .compare-table td {
    border-block-end: 1px solid var(--line);
    border-inline-end: 1px solid var(--line);
    padding: 0.75rem;
    text-align: left;
    vertical-align: top;
    font-size: 0.93rem;
    line-height: 1.7;
  }

  .compare-table th {
    background: var(--surface-soft);
    font-weight: 800;
    text-wrap: balance;
  }

  .compare-table tr:last-child > * {
    border-block-end: 0;
  }

  .compare-table tr > *:last-child {
    border-inline-end: 0;
  }

  .faq-item {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.95rem 1rem;
    background: var(--surface);
  }

  .faq-item + .faq-item {
    margin-block-start: 0.65rem;
  }

  .faq-q {
    display: flex;
    gap: 0.45rem;
    align-items: baseline;
  }

  .faq-q::before {
    content: "Q";
    display: inline-grid;
    flex: 0 0 auto;
    inline-size: 1.45rem;
    block-size: 1.45rem;
    place-items: center;
    border-radius: 999px;
    background: var(--accent);
    color: #ffffff;
    font-size: 0.78rem;
    line-height: 1;
  }

  .faq-a {
    margin-block-end: 0;
    color: #344054;
  }

  #search-status {
    min-block-size: 1.8rem;
  }

  @media (max-width: 760px) {
    .site-search {
      grid-template-columns: 1fr;
    }

    .site-nav,
    .footer-nav {
      gap: 0.4rem;
    }

    .site-nav a,
    .footer-nav a,
    .home-actions a {
      min-block-size: 2.25rem;
      font-size: 0.84rem;
    }

    .home-hero,
    .term-head,
    .term-conclusion,
    .compare-summary {
      padding: 1rem;
    }

    .term-title {
      font-size: 2rem;
    }

    .info-list {
      grid-template-columns: 1fr;
      gap: 0.2rem;
    }

    .info-list dd:not(:last-child) {
      margin-block-end: 0.55rem;
    }

    .compare-table {
      display: block;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

    .compare-table th,
    .compare-table td {
      min-inline-size: 10rem;
    }
  }
}

@layer utilities {
  .muted {
    color: var(--muted);
  }
}