:root {
  --ink: #1C2B49;
  --deep: #14213D;
  --coral: #EE5B43;
  --coral-dark: #C9432D;
  --pale: #DCE7F2;
  --paper: #FDFDFB;
  --card: #FFFFFF;
  --rule: #C9D5E6;
  --sub: #495161;
  --mark: #FFF1C2;
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 64px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.85;
  -webkit-text-size-adjust: 100%;
}

.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }

a { color: var(--ink); }

/* 上の帯 */
.hero { background: var(--deep); color: #fff; padding: 48px 0 40px; }
.eyebrow { margin: 0 0 8px; font-size: 14px; letter-spacing: .08em; opacity: .8; }
.hero h1 { margin: 0; font-size: clamp(24px, 4vw, 34px); line-height: 1.4; display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.round { background: var(--coral); color: #fff; border-radius: 6px; padding: 2px 12px; font-size: .75em; }
.pc-note { margin: 20px 0 0; padding: 12px 16px; background: rgba(255,255,255,.1); border-left: 4px solid var(--coral); border-radius: 4px; font-size: 15px; }

/* 移動の帯 */
.toc { position: sticky; top: 0; z-index: 10; background: rgba(253,253,251,.96); border-bottom: 1px solid var(--rule); backdrop-filter: blur(6px); }
.toc-inner { display: flex; gap: 4px; overflow-x: auto; padding-top: 8px; padding-bottom: 8px; scrollbar-width: thin; }
.toc a { flex: none; text-decoration: none; padding: 6px 12px; border-radius: 999px; font-size: 14px; font-weight: 600; color: var(--ink); }
.toc a:hover, .toc a:focus-visible { background: var(--pale); }

/* 区画 */
.block { padding: 40px 0 8px; border-bottom: 1px solid var(--rule); }
.block:last-of-type { border-bottom: none; }
.block h2 { font-size: 24px; margin: 0 0 16px; display: flex; align-items: center; gap: 12px; }
.step { flex: none; width: 34px; height: 34px; border-radius: 50%; background: var(--ink); color: #fff; display: inline-grid; place-items: center; font-size: 17px; }
.lead { margin: 0 0 16px; }
.note { font-size: 14px; color: var(--sub); }

.prose h3 { font-size: 18px; margin: 28px 0 8px; }
.prose h4 { font-size: 16px; margin: 20px 0 6px; }
.prose ul, .prose ol { padding-left: 1.5em; }
.prose li { margin: 4px 0; }
.prose code, .trouble-body code { background: var(--pale); padding: 1px 6px; border-radius: 4px; font-size: .92em; }

.table-wrap { overflow-x: auto; margin: 12px 0; }
table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 14px; background: var(--card); }
th, td { border: 1px solid var(--rule); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--pale); }

/* ボタン */
.big-btn {
  display: inline-block; background: var(--coral); color: #fff; text-decoration: none; font-weight: 700;
  padding: 14px 24px; border-radius: 8px; margin: 4px 0 16px; box-shadow: 0 2px 0 var(--coral-dark);
}
.big-btn:hover, .big-btn:focus-visible { background: var(--coral-dark); }

/* たたむ部分 */
.fold { background: var(--card); border: 1px solid var(--rule); border-radius: 8px; padding: 0 16px; }
.fold > summary { cursor: pointer; font-weight: 700; padding: 12px 0; }
.fold[open] > summary { border-bottom: 1px solid var(--rule); margin-bottom: 8px; }

/* 指示文 */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 20px; }
.chip { text-decoration: none; border: 1px solid var(--ink); border-radius: 999px; padding: 2px 14px; font-weight: 700; font-size: 14px; }
.chip:hover, .chip:focus-visible { background: var(--ink); color: #fff; }

.prompt { background: var(--card); border: 1px solid var(--rule); border-radius: 10px; margin: 0 0 20px; overflow: hidden; }
.prompt-head { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: var(--pale); }
.prompt-head h3 { margin: 0; font-size: 17px; }
.prompt-no { flex: none; background: var(--ink); color: #fff; border-radius: 6px; padding: 2px 10px; font-weight: 700; font-size: 14px; }
.prompt-body { position: relative; padding: 16px; }
.prompt-text {
  margin: 0; white-space: pre-wrap; word-break: break-word; font-family: inherit; font-size: 15px; line-height: 1.8;
  background: #F6F8FB; border: 1px dashed var(--rule); border-radius: 6px; padding: 14px 16px 14px;
}
.copy-btn {
  display: block; margin: 12px 0 0 auto; background: var(--ink); color: #fff; border: none; border-radius: 6px;
  padding: 10px 28px; font-size: 15px; font-weight: 700; cursor: pointer; font-family: inherit;
}
.copy-btn:hover, .copy-btn:focus-visible { background: var(--deep); }
.copy-btn.done { background: #2E7D4F; }
.prompt-memo { margin: 0; padding: 0 16px 16px; font-size: 14px; color: var(--sub); }
mark.blank { background: var(--mark); color: var(--ink); padding: 0 2px; border-radius: 3px; }

/* スライド */
.viewer { background: var(--deep); border-radius: 10px; padding: 12px; }
.stage img { display: block; width: 100%; height: auto; border-radius: 4px; background: #fff; cursor: zoom-in; }
.controls { display: flex; justify-content: center; align-items: center; gap: 16px; padding: 12px 0; color: #fff; }
.nav-btn { background: #fff; color: var(--ink); border: none; border-radius: 6px; padding: 8px 18px; font-weight: 700; cursor: pointer; font-family: inherit; font-size: 15px; }
.nav-btn:disabled { opacity: .35; cursor: default; }
.counter { min-width: 70px; text-align: center; font-weight: 700; }
.thumbs { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 4px; }
.thumb { flex: none; border: 2px solid transparent; border-radius: 4px; padding: 0; background: none; cursor: pointer; opacity: .6; }
.thumb img { display: block; width: 96px; height: auto; border-radius: 2px; }
.thumb.active { border-color: var(--coral); opacity: 1; }

/* 困った時 */
.trouble { background: var(--card); border: 1px solid var(--rule); border-radius: 8px; margin: 0 0 10px; }
.trouble > summary { cursor: pointer; font-weight: 700; padding: 12px 16px; }
.trouble-body { padding: 0 16px 12px; border-top: 1px solid var(--rule); }
.trouble-body ul { padding-left: 1.2em; }
.indent, .indent-line { color: var(--sub); }
.indent-line { padding-left: 1em; margin: 2px 0; }
.contact { margin: 16px 0; padding: 12px 16px; background: var(--pale); border-radius: 8px; }
.pending { padding: 12px 16px; background: var(--pale); border-radius: 8px; color: var(--sub); }

.foot { background: var(--deep); color: rgba(255,255,255,.75); padding: 24px 0; margin-top: 40px; font-size: 14px; }
.foot p { margin: 0; }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px); opacity: 0;
  background: var(--ink); color: #fff; padding: 10px 20px; border-radius: 999px; font-weight: 700; transition: .2s; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  .hero { padding: 32px 0 28px; }
  .block h2 { font-size: 20px; }
  .copy-btn { width: 100%; }
  .thumb img { width: 72px; }
}

/* ===== 図 ===== */
.overview { padding-top: 32px; }
.journey { display: grid; grid-template-columns: 1fr 1.25fr 1fr; gap: 12px; }
.phase { background: var(--card); border: 1px solid var(--rule); border-radius: 10px; padding: 12px 14px 4px; position: relative; }
.phase.main { border: 2px solid var(--ink); }
.phase:nth-child(-n+2)::after {
  content: "→"; position: absolute; right: -14px; top: 40%; color: var(--coral); font-weight: 900; font-size: 20px; z-index: 2;
}
.phase-name { margin: 0 0 6px; font-weight: 800; color: var(--coral-dark); font-size: 14px; letter-spacing: .05em; }
.phase-steps { margin: 0; padding-left: 1.3em; font-size: 15px; line-height: 1.6; }
.phase-steps li { margin: 4px 0; }
.phase-steps a { text-decoration: none; font-weight: 700; }
.phase-steps a:hover { text-decoration: underline; }
.phase-drop { margin: 8px 0 0; text-align: center; color: var(--coral-dark); font-weight: 800; font-size: 13px; }
.folder-bar { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1.25fr 1fr; gap: 12px; background: #EEF3F9; border: 2px dashed var(--ink); border-radius: 12px; padding: 36px 12px 12px; position: relative; }
.folder-label { position: absolute; top: 8px; left: 14px; margin: 0; font-weight: 800; }
.folder-label small { font-weight: 500; color: var(--sub); margin-left: 10px; font-size: 13px; }
.folder-seg { display: flex; flex-wrap: wrap; gap: 6px; align-content: flex-start; }
.fchip { background: #fff; border: 1px solid var(--rule); border-radius: 6px; padding: 2px 8px; font-size: 13px; font-weight: 600; }
.fchip.new { border-color: var(--coral); color: var(--coral-dark); }
.more, .next { font-size: 13px; color: var(--sub); align-self: center; }
.next { font-weight: 700; color: var(--ink); }

.flowline, .mech, .hw-row { display: flex; align-items: stretch; gap: 0; margin: 8px 0 20px; flex-wrap: nowrap; overflow-x: auto; padding-bottom: 8px; }
.node { flex: 1 1 0; min-width: 160px; background: var(--card); border: 1px solid var(--rule); border-radius: 10px; padding: 10px 12px; text-align: center; font-size: 22px; line-height: 1.3; position: relative; }
.node b { display: block; font-size: 15px; margin-top: 4px; }
.node small { display: block; font-size: 12.5px; color: var(--sub); margin-top: 4px; line-height: 1.5; }
.node.accent { background: var(--ink); color: #fff; border-color: var(--ink); }
.node.accent small { color: rgba(255,255,255,.8); }
.node.folder { background: #EEF3F9; border: 2px dashed var(--ink); }
.arrow { flex: 0 0 auto; min-width: 64px; max-width: 96px; display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 0 6px; color: var(--coral-dark); font-weight: 800; font-size: 13px; text-align: center; }
.arrow::after { content: "→"; font-size: 28px; line-height: 1; color: var(--coral); order: 1; }
.arrow span { order: 0; }
.arrow small { order: 2; font-weight: 600; color: var(--sub); font-size: 11.5px; line-height: 1.4; }
.howto { margin-top: 10px; font-size: 12.5px; line-height: 1.5; background: var(--pale); border-radius: 6px; padding: 6px 8px; text-align: left; font-weight: 600; }
.branch { margin-top: 8px; font-size: 12.5px; line-height: 1.5; background: var(--mark); border-radius: 6px; padding: 6px 8px; color: var(--ink); text-align: left; }
.branch::before { content: "↳ "; font-weight: 800; color: var(--coral-dark); }

.mech { align-items: center; }
.arrow.both::after { content: "⇄"; }
.loop { flex: 1 1 0; min-width: 150px; display: flex; flex-direction: column; align-items: center; margin-left: 12px; }
.loop-arrow { font-weight: 800; color: var(--coral-dark); font-size: 13px; }
.loop .node { width: 100%; }

.hw-map { margin: 8px 0 20px; }
.hw-row { margin: 0 0 10px; }

/* 指示文の地図 */
.prompt-map { list-style: none; padding: 0; margin: 8px 0 28px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px 18px; counter-reset: none; }
.map-step { display: flex; flex-direction: column; gap: 6px; position: relative; }
.map-step:not(:nth-child(4n))::after { content: "→"; position: absolute; right: -16px; top: 50%; color: var(--coral); font-weight: 900; }
.map-in { min-height: 44px; display: flex; flex-wrap: wrap; gap: 4px; align-content: flex-end; }
.file-chip, .use-chip { font-size: 12px; border-radius: 6px; padding: 1px 7px; text-decoration: none; line-height: 1.6; }
.file-chip { background: #fff; border: 1px solid var(--rule); color: var(--ink); }
.file-chip:hover { border-color: var(--ink); }
.use-chip { background: var(--pale); color: var(--sub); }
.map-node { display: block; text-decoration: none; background: var(--ink); color: #fff; border-radius: 10px; padding: 10px 12px; }
.map-node:hover { background: var(--deep); outline: 3px solid var(--coral); }
.map-no { display: inline-block; background: var(--coral); border-radius: 5px; padding: 0 8px; font-weight: 800; font-size: 13px; margin-bottom: 4px; }
.map-scene { display: block; font-weight: 700; font-size: 14px; line-height: 1.5; }
.map-out { font-size: 13px; font-weight: 700; background: #FFF6F3; border: 1px solid #F6C4B8; border-radius: 8px; padding: 6px 8px; line-height: 1.5; }
.out-arrow { display: block; font-size: 11px; color: var(--coral-dark); }
.out-arrow::before { content: "↓ "; }

/* 送る1文 */
.copy-block { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 10px 0; }
.send-text { flex: 1 1 220px; min-width: 0; margin: 0; white-space: pre-wrap; font-family: inherit; background: #F6F8FB; border: 1px dashed var(--rule); border-radius: 6px; padding: 10px 14px; font-weight: 700; }
.copy-btn.small { margin: 0; padding: 8px 16px; font-size: 14px; flex: none; }

/* 資料フォルダの中身 */
.sub { font-size: 19px; margin: 32px 0 8px; }
.caution { background: var(--mark); border-radius: 8px; padding: 10px 14px; font-size: 14.5px; }
.tree { list-style: none; padding: 12px 16px; margin: 0 0 16px; background: var(--card); border: 1px solid var(--rule); border-radius: 10px; columns: 2; column-gap: 24px; }
.tree li { break-inside: avoid; }
.tree ul { list-style: none; padding-left: 18px; margin: 2px 0 8px; border-left: 2px solid var(--pale); }
.tree-name { font-weight: 800; display: block; margin-top: 6px; }
.tree-file { display: flex; align-items: baseline; gap: 6px; text-decoration: none; padding: 3px 6px; border-radius: 6px; font-size: 14.5px; }
.tree-file:hover { background: var(--pale); }
.tree-icon { flex: none; }
.tree-kind { margin-left: auto; font-size: 11.5px; color: var(--sub); flex: none; padding-left: 8px; }
.file-link { color: var(--ink); text-decoration: underline; text-decoration-color: var(--coral); text-underline-offset: 3px; font-weight: 600; }
.callout { background: #FFF6F3; border-left: 4px solid var(--coral); border-radius: 8px; padding: 4px 16px 4px; margin: 20px 0; }
.callout h3 { margin: 12px 0 0; font-size: 17px; }
.made h3 { font-size: 17px; }

/* 困った時のタイル */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 8px; margin: 0 0 16px; }
.tile { text-align: left; background: var(--card); border: 1px solid var(--rule); border-left: 4px solid var(--coral); border-radius: 8px; padding: 10px 12px; font-family: inherit; font-size: 14px; font-weight: 700; color: var(--ink); cursor: pointer; line-height: 1.5; }
.tile:hover { border-color: var(--ink); border-left-color: var(--coral); background: #FFF6F3; }

strong { color: var(--deep); background: linear-gradient(transparent 62%, rgba(238,91,67,.22) 62%); font-weight: 800; }
.hero strong, .node.accent strong { background: none; color: inherit; }

/* ファイルの表示ページ */
.vhead { background: var(--deep); color: #fff; padding: 16px 0; position: sticky; top: 0; z-index: 10; }
.vhead-inner { display: flex; gap: 20px; align-items: center; }
.back { color: #fff; text-decoration: none; background: rgba(255,255,255,.12); border-radius: 6px; padding: 6px 12px; font-weight: 700; flex: none; font-size: 14px; }
.vpath { margin: 0; font-size: 12px; opacity: .75; }
.vhead h1 { margin: 0; font-size: 20px; }
.vmain { padding: 20px 20px 60px; }
.vactions { display: flex; justify-content: flex-end; margin: 0 0 12px; }
.pair { font-size: 13.5px; color: var(--sub); }
.doc { background: var(--card); border: 1px solid var(--rule); border-radius: 10px; padding: 8px 24px 20px; }
.doc h2 { font-size: 20px; margin: 24px 0 8px; }
.plain { white-space: pre-wrap; word-break: break-word; font-family: inherit; font-size: 15px; line-height: 1.85; margin: 12px 0; }

@media (max-width: 760px) {
  .journey, .folder-bar { grid-template-columns: 1fr; }
  .phase:nth-child(-n+2)::after { content: "↓"; right: 50%; top: auto; bottom: -18px; }
  .folder-bar { padding-top: 56px; }
  .prompt-map { grid-template-columns: repeat(2, 1fr); }
  .map-step:not(:nth-child(4n))::after { display: none; }
  .tree { columns: 1; }
}