/* Tokens: see DESIGN.md */
:root {
  --accent: #9fe870; --accent-pale: #e2f6d5; --on-accent: #0e0f0c;
  --ink: #0e0f0c; --body: #454745; --mute: #5f625e;
  --canvas: #ffffff; --canvas-soft: #e8ebe6; --line: #d5d9d2; --mod: #dde2da;
  --r-key: 12px; --r-card: 24px; --gap: 6px;
  --ui: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --accent-pale: #23361a; --ink: #eef1ec; --body: #c3c7c1; --mute: #8d918b;
    --canvas: #1b1d1a; --canvas-soft: #0f110e; --line: #2d312b; --mod: #262a24; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --accent-pale: #23361a; --ink: #eef1ec; --body: #c3c7c1; --mute: #8d918b;
  --canvas: #1b1d1a; --canvas-soft: #0f110e; --line: #2d312b; --mod: #262a24; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--canvas-soft); color: var(--ink); font: 400 16px/1.5 var(--ui); }
a { color: inherit; text-underline-offset: 3px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

/* header */
.site-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; }
.logo { font-weight: 800; font-size: 18px; text-decoration: none; letter-spacing: -0.02em; display: flex; align-items: center; gap: 8px; }
.logo-mark { width: 30px; height: 30px; flex: none; display: block; }
.site-head nav { display: flex; align-items: center; gap: 12px; }
.theme-btn {
  width: 38px; height: 38px; border-radius: 9999px; border: 0; background: var(--canvas); color: var(--ink);
  display: inline-flex; align-items: center; justify-content: center; cursor: pointer; padding: 0;
}
.theme-btn:hover { background: var(--accent-pale); }
.theme-btn:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.theme-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.theme-btn .i-sun, .theme-btn[aria-pressed="true"] .i-moon { display: none; }
.theme-btn[aria-pressed="true"] .i-sun { display: block; }
.site-head nav a { font-weight: 600; font-size: 14px; text-decoration: none; }

h1 { font-size: clamp(22px, 4vw, 34px); line-height: 1.15; font-weight: 800; letter-spacing: -0.03em; margin: 4px 0 12px; }
h1 .native { font-weight: 600; color: var(--body); }

/* text card */
.card { background: var(--canvas); border-radius: var(--r-card); padding: 16px; }
.tool .card { position: relative; }
#vk-text {
  display: block; width: 100%; min-height: 7.5em; resize: vertical; border: 0; outline: 0; background: transparent;
  color: var(--ink); font: 400 22px/1.5 var(--script, var(--ui)); padding: 4px 2px; unicode-bidi: plaintext;
}
#vk-text::placeholder { color: var(--mute); }
.card:focus-within { box-shadow: 0 0 0 2px var(--accent); }
#vk-comp {
  position: absolute; right: 16px; top: -14px; background: var(--accent-pale); color: var(--ink);
  border-radius: 9999px; padding: 2px 12px; font: 600 16px/1.6 var(--script, var(--ui));
}
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; border-top: 1px solid var(--line); padding-top: 12px; margin-top: 8px; }
.btn {
  border: 0; border-radius: 9999px; padding: 8px 16px; font: 600 15px/1.4 var(--ui); cursor: pointer;
  background: var(--canvas-soft); color: var(--ink); min-height: 40px;
}
.btn:hover { background: var(--mod); }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: #b6f08e; }
.btn:focus-visible, .vk-key:focus-visible, .switch input:focus-visible + span { outline: 2px solid var(--ink); outline-offset: 2px; }
#vk-count { margin-left: auto; color: var(--mute); font-size: 13px; }

/* switches row */
.modes { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; margin: 14px 0 10px; font-size: 14px; color: var(--body); }
.switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch > input + span { width: 38px; height: 22px; border-radius: 9999px; background: var(--line); position: relative; transition: background .15s; flex: none; }
.switch > input + span::after { content: ""; position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; border-radius: 50%; background: var(--canvas); transition: transform .15s; }
.switch input:checked + span { background: var(--accent); }
.switch input:checked + span::after { transform: translateX(16px); background: var(--on-accent); }
.kbd { font: 600 12px/1 var(--ui); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 6px; padding: 2px 6px; background: var(--canvas); }
#vk-phonekb { display: none; background: var(--canvas); }
@media (pointer: coarse) { #vk-phonekb { display: inline-flex; } .desk-only { display: none !important; } }

/* keyboard */
.vk { background: var(--canvas); border-radius: var(--r-card); padding: 10px; user-select: none; -webkit-user-select: none; touch-action: manipulation; }
.vk-row { display: flex; gap: var(--gap); margin-bottom: var(--gap); }
.vk-row:last-child { margin-bottom: 0; }
.vk-key, .vk-spacer { flex: 1 1 0; min-width: 0; }
.vk-key {
  position: relative; height: 54px; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: var(--r-key);
  background: var(--canvas); color: var(--ink); cursor: pointer; padding: 0; font: 400 21px/1 var(--script, var(--ui));
  display: flex; align-items: center; justify-content: center; -webkit-tap-highlight-color: transparent;
}
.vk-key:hover { background: var(--accent-pale); }
.vk-key:disabled { cursor: default; background: transparent; border-color: transparent; }
.vk-key.is-down { background: var(--accent); color: var(--on-accent); transform: translateY(1px); }
.vk-hint { position: absolute; top: 5px; left: 7px; font: 600 10px/1 var(--ui); color: var(--mute); }
.vk-mod { background: var(--mod); border-color: transparent; font: 600 14px/1 var(--ui); color: var(--body); }
.vk-mod.is-on { background: var(--accent); color: var(--on-accent); }
.vk-back, .vk-enter, .vk-shift { font-size: 20px; }
.vk-glyph { pointer-events: none; }

#vk-toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--ink); color: var(--canvas);
  padding: 10px 18px; border-radius: 9999px; font-weight: 600; z-index: 10;
}

/* content below the tool */
.content { padding: 32px 0 48px; max-width: 760px; }
.content h2 { font-size: 22px; letter-spacing: -0.02em; margin: 28px 0 8px; }
.content p, .content li { color: var(--body); }
.site-foot { background: #0e0f0c; color: #e8ebe6; padding: 40px 0 28px; font-size: 14px; margin-top: 24px; }
.site-foot a { color: #e8ebe6; }

/* index grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 8px; padding: 0; list-style: none; }
.grid a { display: block; background: var(--canvas); border-radius: 14px; padding: 10px 14px; text-decoration: none; font-weight: 600; }
.grid a:hover { background: var(--accent-pale); }
.grid small { display: block; color: var(--mute); font-weight: 400; }

/* phone */
@media (max-width: 639px) {
  :root { --r-key: 8px; --gap: 4px; }
  .wrap { padding: 0 8px; }
  .site-head { padding: 8px 4px; }
  .logo { font-size: 16px; }
  .site-head nav a { display: none; }
  h1 { font-size: 20px; margin: 0 4px 8px; }
  .card { padding: 12px; border-radius: 18px; }
  #vk-text { font-size: 20px; min-height: 4.6em; }
  .toolbar { gap: 6px; }
  .btn { padding: 6px 12px; font-size: 14px; min-height: 36px; }
  [data-act="download"], #vk-count { display: none; }
  .modes { margin: 8px 4px; }
  .vk { padding: 6px 4px; border-radius: 16px; }
  .vk-key { height: 48px; font-size: 19px; border-radius: var(--r-key); }
  .vk-hint { display: none; }
  .vk-mod { font-size: 13px; }
  html.vk-native .vk { display: none; }
}

/* SEO page parts */
.crumbs { font-size: 13px; color: var(--mute); margin: 2px 0 4px; }
.crumbs a { color: var(--body); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: -4px 0 12px; padding: 0; }
.chip { background: var(--canvas); border-radius: 9999px; padding: 3px 12px; font-size: 13px; font-weight: 600; color: var(--body); }
.layout-pick { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; }
.layout-pick select {
  font: 600 14px/1.2 var(--ui); color: var(--ink); background: var(--canvas); border: 1px solid var(--line);
  border-radius: 9999px; padding: 8px 12px; min-height: 38px;
}
.content h3 { font-size: 17px; margin: 18px 0 4px; }
.table-wrap { overflow-x: auto; background: var(--canvas); border-radius: 18px; padding: 4px 8px; }
table.letters { border-collapse: collapse; width: 100%; font-size: 15px; }
table.letters th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--mute); padding: 10px 8px; }
table.letters td { padding: 7px 8px; border-top: 1px solid var(--line); color: var(--body); }
table.letters td.ch { font: 400 24px/1.2 var(--script, var(--ui)); color: var(--ink); width: 3.2em; text-align: center; }
kbd { font: 600 13px/1.4 var(--ui); background: var(--canvas-soft); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 6px; padding: 1px 7px; color: var(--ink); white-space: nowrap; }
ul.related { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; list-style: none; }
ul.related a { display: inline-block; background: var(--canvas); border-radius: 9999px; padding: 6px 14px; text-decoration: none; font-weight: 600; font-size: 14px; color: var(--ink); }
ul.related a:hover { background: var(--accent-pale); }
.source { font-size: 13px; color: var(--mute) !important; }
.foot-links { line-height: 2; }
.prose { padding-top: 16px; }
.prose code { font-size: 14px; }
@media (max-width: 639px) {
  .content { padding: 24px 4px 40px; }
  table.letters td.ch { font-size: 22px; }
  .chips { margin: -2px 4px 10px; }
}
table.keydata td.ch { font-size: 18px; width: 4.5em; }

/* guides */
.site-head nav a + a { margin-left: 4px; }
.guide { max-width: 760px; }
.byline { color: var(--mute); font-size: 14px; margin: -4px 0 16px; }
.lede p { font-size: 19px; line-height: 1.55; color: var(--ink); margin: 0 0 16px; }
dl.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; margin: 0 0 20px; }
dl.stats div { background: var(--canvas); border-radius: 18px; padding: 14px 16px; }
dl.stats dt { font-size: 28px; font-weight: 800; letter-spacing: -0.03em; }
dl.stats dd { margin: 0; color: var(--body); font-size: 14px; }
.toc { background: var(--canvas); border-radius: 18px; padding: 14px 20px; margin-bottom: 8px; font-size: 15px; }
.toc ol { margin: 6px 0 0; padding-left: 20px; columns: 2; column-gap: 24px; }
.toc a { color: var(--body); }
.guide-body { padding-top: 8px; }
.guide-body p, .guide-body li { font-size: 17px; line-height: 1.65; }
.guide-body ol li, .guide-body ul li { margin-bottom: 4px; }
.gch { font-size: 1.25em; font-family: var(--script, var(--ui)); }
table.letters td .gch { font-size: 24px; }
table.kana td { text-align: center; line-height: 1.5; }
table.kana small { color: var(--mute); font-size: 12px; }
ul.sources li { font-size: 14px; }
ul.guide-list { list-style: none; padding: 0; display: grid; gap: 8px; }
ul.guide-list a { display: block; background: var(--canvas); border-radius: 18px; padding: 14px 18px; text-decoration: none; }
ul.guide-list a:hover { background: var(--accent-pale); }
ul.guide-list b { display: block; font-size: 17px; }
ul.guide-list span { color: var(--body); font-size: 14px; }
@media (max-width: 639px) {
  .toc ol { columns: 1; }
  .lede p { font-size: 17px; }
  .guide-body p, .guide-body li { font-size: 16px; }
  .site-head nav a[href$="#all"] { display: none; }
}

/* learning layer: what the last key typed */
.vk-info { min-height: 28px; margin: 8px 4px 0; color: var(--body); font-size: 14px; }
.vk-info b { font: 400 22px/1 var(--script, var(--ui)); color: var(--ink); margin-right: 6px; vertical-align: -2px; }
.vk-info span { color: var(--mute); font-size: 12px; margin-left: 6px; }

table.fidel td { text-align: center; }
table.fidel td.ch { font-size: 22px; line-height: 1.2; width: auto; }
table.fidel small { font: 600 11px/1 var(--ui); color: var(--mute); }

.lang-search { width: 100%; max-width: 420px; font: 400 16px/1.4 var(--ui); padding: 10px 16px; border-radius: 9999px;
  border: 1px solid var(--line); background: var(--canvas); color: var(--ink); margin: 0 0 12px; }
.lang-search:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

/* cookie banner */
.consent { position: fixed; left: 12px; right: 12px; bottom: calc(12px + env(safe-area-inset-bottom)); z-index: 50; max-width: 620px;
  margin: 0 auto; background: var(--canvas); color: var(--ink); border-radius: 20px; padding: 14px 16px;
  box-shadow: 0 8px 30px rgba(0,0,0,.18); }
.consent p { margin: 0 0 10px; font-size: 15px; line-height: 1.45; color: var(--body); }
.consent a { color: var(--ink); }
.consent-btns { display: flex; gap: 8px; }
.consent-btns .btn { flex: 1 1 120px; }
body.has-consent { padding-bottom: 150px; }

/* accessibility: 24px minimum touch targets in the table of contents */
.toc li { margin: 2px 0; }
.toc a { display: inline-block; padding: 3px 0; min-height: 24px; }
.table-wrap:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* reserve the keyboard's height before JavaScript draws it (no layout shift) */
.vk { min-height: 318px; }
@media (max-width: 639px) { .vk { min-height: 222px; } }

/* footer */
.foot-h { font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: #9fe870; margin: 0 0 12px; }
.all-kb ul { list-style: none; margin: 0; padding: 0; columns: 6 130px; column-gap: 24px; }
.all-kb li { break-inside: avoid; line-height: 1.5; padding: 3px 0; }
.all-kb a, .foot-legal a { color: #c3c7c1; text-decoration: none; }
.all-kb a:hover, .foot-legal a:hover { color: #ffffff; text-decoration: underline; }
.foot-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px 24px;
  border-top: 1px solid #2d312b; margin-top: 28px; padding-top: 18px; }
.foot-brand { font-weight: 800; color: #e8ebe6; }
.foot-legal { display: flex; flex-wrap: wrap; gap: 6px 20px; }
.foot-legal a { display: inline-block; padding: 3px 0; }
@media (max-width: 639px) { .all-kb ul { columns: 3; column-gap: 14px; font-size: 13px; } .site-foot { padding: 32px 4px 24px; } }