/* =========================================================
   絵描きの帳場 — デザインシステム
   コンセプト：文房具屋 × ネオブルータリズム
   ・方眼紙の地、太い黒線、ずらした硬い影
   ・極太の見出し（Dela Gothic One）と、伝票のような等幅の数字
   ・ツールごとの色：手取り＝蛍光ペンの黄、依頼表＝朱色
   ・ライトが標準。ダークは利用者が選んだときだけ
   ========================================================= */
:root {
  --paper: #fffcf2;
  --grid: rgba(18, 18, 18, .055);
  --surface: #ffffff;
  --surface-2: #f4efe0;
  --ink: #121212;
  --ink-2: #3b3830;
  --ink-3: #6b665a;
  --line: #121212;
  --line-soft: rgba(18, 18, 18, .2);
  --yellow: #ffd60a;
  --vermilion: #ff5b24;
  --blue: #3d5afe;
  --mint: #19c38e;
  --pink: #ff8fc8;
  --accent: var(--vermilion);
  --accent-ink: #121212;
  --accent-soft: #ffe3d6;
  --good: #0a8a57;
  --good-soft: #d9f5e8;
  --fee: #e3321b;
  --fee-soft: #ffe1db;
  --tax: #b87400;
  --tax-soft: #fff0c7;
  --focus: var(--blue);
  --shadow: 4px 4px 0 var(--ink);
  --shadow-sm: 2px 2px 0 var(--ink);
  --shadow-lg: 7px 7px 0 var(--ink);
  --radius: 8px;
  --radius-sm: 5px;
  --font: "Zen Kaku Gothic New", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  --display: "Dela Gothic One", "Zen Kaku Gothic New", "Hiragino Sans", sans-serif;
  --mono: "Space Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --max: 1180px;
  color-scheme: light;
}
/* ツールごとの色 */
body[data-tool="tedori"] { --accent: var(--yellow); --accent-ink: #121212; --accent-soft: #fff4b8; }
body[data-tool="irai"] { --accent: var(--vermilion); --accent-ink: #121212; --accent-soft: #ffe3d6; }

/* ダーク（選んだときだけ） */
:root[data-theme="dark"] {
  --paper: #17160f;
  --grid: rgba(255, 250, 230, .05);
  --surface: #211f17;
  --surface-2: #2b281e;
  --ink: #f6f0dc;
  --ink-2: #d6cfb9;
  --ink-3: #a19a85;
  --line: #f6f0dc;
  --line-soft: rgba(246, 240, 220, .22);
  --accent-soft: #3b2a1c;
  --good: #3fd69a;
  --good-soft: #143326;
  --fee: #ff7a63;
  --fee-soft: #3d1d17;
  --tax: #ffc24a;
  --tax-soft: #3a2d11;
  --focus: #8ea0ff;
  --shadow: 4px 4px 0 #000;
  --shadow-sm: 2px 2px 0 #000;
  --shadow-lg: 7px 7px 0 #000;
  color-scheme: dark;
}
:root[data-theme="dark"] body[data-tool="tedori"] { --accent-soft: #3a3410; }

/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
body {
  margin: 0; color: var(--ink); font-family: var(--font); font-size: 16px; line-height: 1.75;
  background-color: var(--paper);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-font-smoothing: antialiased; overflow-x: clip;
}
img, svg, canvas { max-width: 100%; display: block; }
a { color: var(--ink); text-decoration-color: var(--accent); text-decoration-thickness: 3px; text-underline-offset: 4px; }
a:hover { background: var(--accent-soft); }
h1, h2, h3 { line-height: 1.3; margin: 0 0 .5em; word-break: auto-phrase; text-wrap: balance; }
h1 { font-family: var(--display); font-weight: 400; font-size: clamp(2rem, 1.3rem + 3.2vw, 3.6rem); letter-spacing: .02em; line-height: 1.15; }
h2 { font-family: var(--display); font-weight: 400; font-size: clamp(1.3rem, 1.1rem + .8vw, 1.7rem); letter-spacing: .02em; }
h3 { font-size: 1.08rem; font-weight: 700; }
p { margin: 0 0 1em; }
strong { font-weight: 700; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
[hidden] { display: none !important; }
.sr-only { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.skip { position: absolute; left: 12px; top: -60px; background: var(--ink); color: var(--paper); padding: 8px 14px; z-index: 100; }
.skip:focus { top: 12px; }
::selection { background: var(--yellow); color: #121212; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 28px; } }

/* 蛍光ペンの線 */
.mark { background: linear-gradient(transparent 58%, var(--yellow) 58%, var(--yellow) 92%, transparent 92%); padding: 0 .1em; }
:root[data-theme="dark"] .mark { background: linear-gradient(transparent 58%, rgba(255, 214, 10, .45) 58%, rgba(255, 214, 10, .45) 92%, transparent 92%); }

/* ===== Header ===== */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--paper); border-bottom: 2px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; gap: 10px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; white-space: nowrap; }
.brand:hover { background: none; }
.brand svg { width: 34px; height: 34px; flex: none; }
.brand-name { font-family: var(--display); font-size: 1.1rem; letter-spacing: .02em; }
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav a {
  color: var(--ink); text-decoration: none; font-size: .9rem; font-weight: 700; padding: 6px 12px; white-space: nowrap;
  border: 2px solid transparent; border-radius: var(--radius-sm);
}
.nav a:hover { border-color: var(--line); background: var(--surface); }
.nav a[aria-current="page"] { background: var(--accent); color: var(--accent-ink); border-color: var(--line); box-shadow: var(--shadow-sm); }
.theme-switch { display: inline-flex; border: 2px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; margin-left: 6px; background: var(--surface); }
.theme-switch button { font: inherit; font-size: .78rem; font-weight: 700; border: 0; background: none; color: var(--ink-3); padding: 5px 9px; cursor: pointer; display: inline-flex; align-items: center; gap: 5px; }
.theme-switch button + button { border-left: 2px solid var(--line); }
.theme-switch button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.theme-switch svg { width: 14px; height: 14px; }
@media (max-width: 640px) {
  .nav .nav-long { display: none; }
  .nav a { padding: 5px 8px; font-size: .84rem; }
  .theme-switch .t-label { display: none; }
}
@media (max-width: 440px) { .brand-name { display: none; } }

/* ===== Footer ===== */
.site-footer { background: var(--ink); color: var(--paper); margin-top: 88px; padding: 48px 0 56px; border-top: 2px solid var(--line); }
:root[data-theme="dark"] .site-footer { background: #0c0b07; color: var(--ink); }
.site-footer .wrap { display: grid; gap: 28px; }
.footer-word { font-family: var(--display); font-size: clamp(2.2rem, 1rem + 6vw, 5.2rem); line-height: 1; letter-spacing: .02em; }
.footer-word span { color: var(--yellow); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: .9rem; }
.site-footer a { color: inherit; text-decoration-color: var(--yellow); }
.site-footer a:hover { background: none; color: var(--yellow); }
.footer-meta { font-size: .8rem; opacity: .7; font-family: var(--mono); }

/* ===== Components ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 18px;
  border-radius: var(--radius-sm); border: 2px solid var(--line); background: var(--surface); color: var(--ink);
  font: inherit; font-weight: 700; font-size: .95rem; cursor: pointer; text-decoration: none; box-shadow: var(--shadow-sm);
  transition: transform .08s, box-shadow .08s, background .12s;
}
.btn:hover { transform: translate(-1px, -1px); box-shadow: 3px 3px 0 var(--ink); background: var(--surface); }
:root[data-theme="dark"] .btn:hover { box-shadow: 3px 3px 0 #000; }
.btn:active { transform: translate(2px, 2px); box-shadow: 0 0 0 var(--ink); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { background: var(--ink); }
.btn-ghost { border-color: transparent; box-shadow: none; background: transparent; }
.btn-ghost:hover { border-color: var(--line); background: var(--surface); box-shadow: var(--shadow-sm); }
.btn-sm { min-height: 36px; padding: 0 12px; font-size: .85rem; }
.btn svg { width: 18px; height: 18px; flex: none; }

.card { background: var(--surface); border: 2px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }

.field { display: grid; gap: 6px; }
.field > label, .label { font-size: .82rem; font-weight: 700; color: var(--ink); letter-spacing: .02em; }
.hint { font-size: .8rem; color: var(--ink-3); line-height: 1.6; }
.input, .select, .textarea {
  width: 100%; min-height: 46px; padding: 9px 12px; border: 2px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--ink); font: inherit; font-size: 16px; transition: box-shadow .1s;
}
.textarea { min-height: 84px; resize: vertical; line-height: 1.6; }
.input:focus, .select:focus, .textarea:focus { outline: none; box-shadow: 4px 4px 0 var(--accent); }
.input::placeholder, .textarea::placeholder { color: var(--ink-3); opacity: .8; }
.select { appearance: none; padding-right: 38px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%23121212' stroke-width='2.5'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; }
:root[data-theme="dark"] .select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%23f6f0dc' stroke-width='2.5'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E"); }

/* 切り替え（セグメント） */
.seg { display: inline-flex; border: 2px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); overflow: hidden; box-shadow: var(--shadow-sm); }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label { padding: 9px 16px; font-size: .9rem; font-weight: 700; color: var(--ink-2); cursor: pointer; min-height: 42px; display: inline-flex; align-items: center; justify-content: center; }
.seg label + input + label, .seg input + label ~ label { border-left: 2px solid var(--line); }
.seg input:checked + label { background: var(--ink); color: var(--paper); }
.seg input:focus-visible + label { outline: 3px solid var(--focus); outline-offset: -5px; }

/* チップ（チェックボックス） */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span {
  display: inline-flex; align-items: center; gap: 6px; min-height: 38px; padding: 5px 12px; border-radius: var(--radius-sm);
  border: 2px solid var(--line); background: var(--surface); font-size: .86rem; font-weight: 700; color: var(--ink-2); transition: transform .08s;
}
.chip input:checked + span { background: var(--accent); color: var(--accent-ink); box-shadow: var(--shadow-sm); transform: translate(-1px, -1px); }
.chip input:checked + span::before { content: "✓"; font-family: var(--mono); font-weight: 700; }
.chip input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }

/* スイッチ */
.switch { display: flex; align-items: flex-start; gap: 12px; cursor: pointer; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch .track { flex: none; width: 48px; height: 28px; border-radius: var(--radius-sm); border: 2px solid var(--line); background: var(--surface-2); position: relative; transition: background .12s; margin-top: 1px; }
.switch .track::after { content: ""; position: absolute; top: 2px; left: 2px; width: 20px; height: 20px; border-radius: 3px; background: var(--ink); transition: transform .12s; }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(20px); }
.switch input:focus-visible + .track { outline: 3px solid var(--focus); outline-offset: 2px; }
.switch .switch-text { font-size: .92rem; line-height: 1.5; font-weight: 700; }
.switch .switch-text small { display: block; color: var(--ink-3); font-size: .8rem; font-weight: 500; }

.badge { display: inline-flex; align-items: center; gap: 4px; font-size: .7rem; font-weight: 700; padding: 1px 7px; border-radius: 3px; background: var(--surface); color: var(--ink); border: 1.5px solid var(--line); white-space: nowrap; letter-spacing: .03em; }
.badge-good { background: var(--good-soft); color: var(--good); border-color: var(--good); }
.badge-accent { background: var(--accent); color: var(--accent-ink); }

/* ステッカー（見出しの横に貼る札） */
.stickers { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 0; padding: 0; list-style: none; }
.sticker { display: inline-block; font-weight: 700; font-size: .85rem; padding: 5px 12px; border: 2px solid var(--line); background: var(--surface); box-shadow: var(--shadow-sm); border-radius: var(--radius-sm); transform: rotate(var(--r, -2deg)); transition: transform .15s; }
.sticker:nth-child(2) { --r: 1.5deg; background: var(--accent); color: var(--accent-ink); }
.sticker:nth-child(3) { --r: -1deg; background: var(--mint); color: #121212; }
.sticker:nth-child(4) { --r: 2deg; background: var(--pink); color: #121212; }
.sticker:hover { transform: rotate(0) scale(1.04); }

/* ===== Page hero ===== */
.page-hero { padding: 12px 0 28px; display: grid; gap: 4px; }
.page-hero .eyebrow { font-family: var(--mono); font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.page-hero .lead { color: var(--ink-2); font-size: 1.04rem; max-width: 720px; margin: 6px 0 0; }

/* ===== Article (SEO body) ===== */
.prose { max-width: 780px; }
.prose h2 { margin-top: 2.4em; padding-bottom: .25em; border-bottom: 3px solid var(--line); }
.prose h3 { margin-top: 1.6em; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 1em; }
.prose li { margin: .3em 0; }
.prose li::marker { color: var(--accent); }
body[data-tool="tedori"] .prose li::marker { color: var(--ink); }
.prose table { width: 100%; border-collapse: collapse; margin: 0 0 1.4em; font-size: .92rem; background: var(--surface); border: 2px solid var(--line); }
.prose th, .prose td { border-bottom: 1.5px solid var(--line-soft); padding: 9px 12px; text-align: left; vertical-align: top; }
.prose table.kv th { width: 1%; white-space: nowrap; }
.prose thead th { background: var(--ink); color: var(--paper); font-weight: 700; border-bottom: 0; }
.prose td.r, .prose th.r { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; }
.prose thead th.r { font-family: var(--font); }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 0 1.4em; border: 2px solid var(--line); border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); }
.table-scroll table { margin: 0; min-width: 520px; border: 0; }
.callout { border: 2px dashed var(--line); background: var(--accent-soft); padding: 12px 16px; border-radius: var(--radius-sm); margin: 0 0 1.2em; font-size: .93rem; }
.faq details { border: 2px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 13px 52px 13px 16px; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 12px; top: 50%; transform: translateY(-50%); width: 26px; height: 26px; display: grid; place-items: center; border: 2px solid var(--line); border-radius: 3px; font-family: var(--mono); font-weight: 700; background: var(--accent); color: var(--accent-ink); }
.faq details[open] summary::after { content: "−"; }
.faq details[open] summary { border-bottom: 2px dashed var(--line-soft); }
.faq details > div { padding: 12px 16px 14px; color: var(--ink-2); }
.breadcrumb { font-size: .8rem; color: var(--ink-3); margin: 22px 0 10px; font-family: var(--mono); }
.breadcrumb ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumb li + li::before { content: "→"; margin-right: 6px; }
.breadcrumb a { color: var(--ink-2); text-decoration: none; }

.related { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); margin: 0 0 1.4em; }
.related a { display: block; padding: 14px 16px; text-decoration: none; color: var(--ink); font-weight: 700; position: relative; transition: transform .1s, box-shadow .1s; }
.related a::after { content: "→"; position: absolute; right: 14px; top: 14px; font-family: var(--mono); }
.related a:hover { background: var(--accent); color: var(--accent-ink); transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--ink); }
.related small { display: block; color: inherit; opacity: .75; font-size: .8rem; font-weight: 500; margin-top: 2px; }

/* toast */
.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); background: var(--ink); color: var(--paper); padding: 10px 18px; border: 2px solid var(--line); border-radius: var(--radius-sm); font-size: .9rem; font-weight: 700; opacity: 0; pointer-events: none; transition: all .18s; z-index: 200; box-shadow: 4px 4px 0 var(--accent); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.kofi-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; padding: 20px 22px; margin: 40px 0 0; background: var(--yellow); color: #121212; }
.kofi-cta p { margin: 0; flex: 1 1 260px; font-weight: 700; }
.kofi-cta .btn { background: #121212; color: #fffcf2; }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }