:root {
  color-scheme: light;
  --ink: #17243b;
  --muted: #53627a;
  --blue: #2055e5;
  --line: #dfe5ee;
  --page: #f7f9fc;
  --white: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; }
body { margin: 0; color: var(--ink); background: var(--page); line-height: 1.65; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
.skip-link { position: fixed; top: -6rem; left: 1rem; z-index: 10; padding: .75rem 1rem; background: var(--blue); color: white; border-radius: .5rem; }
.skip-link:focus { top: 1rem; }
.site-header { background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); }
.header-inner { max-width: 1480px; margin: auto; min-height: 82px; padding: 1rem 2.5rem; display: flex; align-items: center; gap: 2rem; }
.brand { display: inline-flex; align-items: center; gap: .625rem; font-family: "Arial", sans-serif; font-size: 1.8rem; font-weight: 750; letter-spacing: -.07rem; line-height: 1.2; }
.brand-blue { color: var(--blue); }
.brand-mark { width: 32px; height: 32px; display: grid; grid-template-columns: 1fr 1fr; gap: 3px; padding: 6px; background: var(--blue); border-radius: 7px; flex: 0 0 auto; }
.brand-mark i { background: white; border-radius: 1px; }
.header-label { border-left: 1px solid var(--line); padding-left: 2rem; color: var(--muted); font-size: .875rem; }
.header-index { margin-left: auto; display: flex; gap: .8rem; font-size: .75rem; letter-spacing: .08em; font-weight: 600; color: var(--muted); white-space: nowrap; }
.header-index span { color: var(--blue); }
.workspace { display: grid; grid-template-columns: 204px minmax(0, 1fr); gap: 3.25rem; max-width: 1480px; padding: 0 2.5rem; margin: auto; }
.sidebar { border-right: 1px solid var(--line); padding: 3rem 1.5rem 0 0; }
.sidebar-sticky { position: sticky; top: 2rem; }
.sidebar-title { padding-left: .8rem; margin-bottom: 1rem; font-size: .875rem; font-weight: 650; color: var(--muted); }
.category-nav { display: flex; flex-direction: column; gap: .5rem; }
.category-nav a { display: flex; align-items: center; gap: .65rem; padding: .85rem .8rem; border-radius: 7px; font-size: .9375rem; font-weight: 650; transition: background .18s, color .18s; }
.category-nav a:hover { background: #eaf0ff; color: var(--blue); }
.nav-number { color: #667794; font: .75rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; }
.nav-count { margin-left: auto; color: #65738b; font-size: .75rem; font-weight: 500; }
.sidebar-total { padding: 1.9rem .8rem; border-top: 1px solid var(--line); margin-top: 2.4rem; }
.sidebar-total strong { display: block; font-size: 3.9rem; line-height: 1.1; font-weight: 550; letter-spacing: -.2rem; color: var(--blue); }
.sidebar-total strong span { margin-left: .5rem; font-size: .875rem; letter-spacing: 0; font-weight: 500; }
.sidebar-total > span { display: block; margin-top: .7rem; font-size: .75rem; color: var(--muted); line-height: 1.8; }
main { min-width: 0; padding-top: 2.85rem; }
.page-heading { display: flex; justify-content: space-between; gap: 1.5rem; align-items: flex-end; margin-bottom: 2.8rem; }
.eyebrow { margin: 0 0 .7rem; color: var(--blue); font-size: .75rem; letter-spacing: .13em; font-weight: 700; }
h1 { font-size: 2.15rem; line-height: 1.4; letter-spacing: -.025em; margin: 0; display: flex; align-items: center; gap: .75rem; }
.total-badge { display: inline-flex; padding: .15rem .65rem; border: 1px solid #c8d7ff; border-radius: 6px; color: var(--blue); background: #eaf0ff; font-size: .9rem; line-height: 1.5; letter-spacing: 0; font-weight: 600; }
.page-description { color: var(--muted); margin: .75rem 0 0; font-size: 1rem; }
.open-note { flex-shrink: 0; font-size: .75rem; color: var(--muted); margin: 0 0 .1rem; }
.open-note span { font-size: 1rem; margin-right: .2rem; }
.tool-section { margin-bottom: 2.75rem; scroll-margin-top: 2rem; }
.section-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; gap: 1rem; }
.section-title { display: flex; flex-wrap: wrap; align-items: center; gap: .65rem; }
.section-number { font: .75rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--blue); padding-right: .3rem; }
h2 { font-size: 1.25rem; line-height: 1.5; letter-spacing: .02em; margin: 0; }
.section-subtitle { color: #687890; font-size: .75rem; letter-spacing: .08em; margin-left: .35rem; }
.section-count { font-size: .75rem; color: #63728b; white-space: nowrap; }
.tool-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.tool-grid-paired { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tool-card { padding: 1.3rem 1.35rem 1rem; border: 1px solid var(--line); border-radius: 12px; background: var(--white); display: flex; flex-direction: column; min-width: 0; transition: border-color .18s, box-shadow .18s, transform .18s; position: relative; }
.tool-card:hover { border-color: #8ba9f3; box-shadow: 0 6px 20px rgba(27,64,145,.065); transform: translateY(-3px); }
.tool-card:focus-visible { border-color: var(--blue); }
.card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.05rem; gap: 1rem; }
.tool-symbol { height: 44px; min-width: 44px; padding: 0 .3rem; display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; font-family: "Arial", sans-serif; font-size: 1.2rem; font-weight: 700; letter-spacing: -.04em; line-height: 1; }
.tool-symbol span { font-weight: 500; margin-left: .05rem; font-size: 1rem; }
.symbol-small { font-size: .875rem; letter-spacing: -.035em; }
.image-symbol { color: #2055d9; background: #eaf0ff; }
.pdf-symbol { color: #b74b27; background: #fff0e9; }
.creative-symbol { color: #6650b2; background: #f0ecfc; }
.social-symbol { color: #167267; background: #e8f5f1; }
.card-index { color: #65748d; font: .75rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }
h3 { font-size: 1.125rem; line-height: 1.6; letter-spacing: 0; margin: 0 0 .55rem; font-weight: 700; overflow-wrap: anywhere; }
.tool-card > p { margin: 0 0 1.25rem; color: var(--muted); line-height: 1.85; font-size: 1rem; flex: 1; overflow-wrap: anywhere; }
.card-bottom { border-top: 1px solid #edf0f5; padding-top: .8rem; display: flex; align-items: center; gap: .75rem; justify-content: space-between; }
.tool-detail { min-width: 0; overflow-wrap: anywhere; font-size: .875rem; color: var(--muted); line-height: 1.75; }
.card-arrow { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 28px; width: 28px; height: 28px; border-radius: 50%; color: var(--blue); background: #f1f5ff; font-size: 1.25rem; transition: color .18s, background .18s; }
.tool-card:hover .card-arrow { background: var(--blue); color: white; }
.access-note, .setup-note { display: inline-block; margin-left: .6rem; color: #67552e; background: #f8f3e8; font-size: .75rem; padding: .05rem .4rem; border-radius: 4px; }
.access-note { display: block; width: fit-content; margin: .35rem 0 0; }
.site-footer { padding: 1.4rem 0 2rem; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 1rem; color: var(--muted); font-size: .8125rem; }
.site-footer a { font-size: .875rem; padding: .5rem 0; }
.site-footer a:hover { color: var(--blue); }
.site-footer a span { padding-left: .5rem; }
@media (max-width: 1180px) {
  .header-inner { padding-inline: 1.75rem; }
  .workspace { grid-template-columns: 180px minmax(0, 1fr); gap: 2rem; padding-inline: 1.75rem; }
  .sidebar { padding-right: 1rem; }
  .page-heading { display: block; }
  .open-note { margin-top: 1rem; }
  .tool-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tool-grid:not(.tool-grid-paired) .tool-card:last-child { grid-column: 1 / -1; }
  .tool-grid:not(.tool-grid-paired) .tool-card:last-child > p { max-width: 38rem; }
}
@media (max-width: 820px) {
  .header-inner { min-height: 72px; padding: 1rem 1.5rem; }
  .header-label { border: 0; margin-left: auto; padding: 0; font-size: .75rem; }
  .header-index { display: none; }
  .workspace { display: block; padding-inline: 1.5rem; }
  .sidebar { border: 0; padding: 1.5rem 0 0; }
  .sidebar-sticky { position: static; }
  .sidebar-title, .sidebar-total { display: none; }
  .category-nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .5rem; }
  .category-nav a { justify-content: center; padding: .6rem .5rem; border: 1px solid var(--line); border-radius: 7px; background: white; font-size: .875rem; gap: .4rem; }
  .nav-number { display: none; }
  .nav-count { margin-left: .1rem; }
  main { padding-top: 2rem; }
  .page-heading { margin-bottom: 2rem; }
}
@media (max-width: 540px) {
  .header-inner { padding: 1rem 1.125rem; flex-wrap: wrap; gap: .5rem 1rem; }
  .brand { font-size: 1.55rem; }
  .brand-mark { width: 29px; height: 29px; }
  .header-label { font-size: .75rem; max-width: 8.7rem; line-height: 1.6; }
  .workspace { padding-inline: 1.125rem; }
  .category-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-nav a { justify-content: flex-start; padding: .65rem .85rem; }
  .nav-count { margin-left: auto; }
  h1 { font-size: 1.9rem; }
  .page-description { max-width: 20rem; }
  .tool-grid, .tool-grid-paired { grid-template-columns: minmax(0, 1fr); gap: .75rem; }
  .tool-grid:not(.tool-grid-paired) .tool-card:last-child { grid-column: auto; }
  .tool-card { padding: 1.2rem; }
  .card-top { margin-bottom: .85rem; }
  .tool-section { margin-bottom: 2rem; }
  .section-title { gap: .45rem; }
  .section-subtitle { font-size: .75rem; margin-left: .1rem; }
  .section-count { display: none; }
  .card-index { font-size: .75rem; }
  .tool-detail { font-size: .875rem; }
  .access-note { display: inline-block; margin: .2rem 0 .2rem .5rem; }
  .site-footer { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
  .tool-card:hover { transform: none; }
}