:root {
  --paper: #f5efe3;
  --paper-deep: #ece3d0;
  --card: #fbf7ee;
  --ink: #2b2620;
  --ink-soft: #6f6657;
  --vermilion: #c1442e;
  --vermilion-deep: #a23420;
  --rule: #d8ccb4;
  --serif: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  --sans: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
  --sidebar-w: 264px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(193, 68, 46, 0.05), transparent 34%),
    repeating-linear-gradient(0deg, transparent 0 31px, rgba(43, 38, 32, 0.035) 31px 32px);
  line-height: 1.75;
  overflow-wrap: anywhere;
}

/* ===== header ===== */
.site-header {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  width: 100%;
  padding: 14px clamp(16px, 4vw, 36px);
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 40;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px clamp(16px, 4vw, 36px);
  border-bottom: 1px solid var(--rule);
  background: var(--card);
  font-size: 0.85rem;
  position: sticky;
  top: var(--header-h, 68px);
  z-index: 39;
}
.breadcrumb .bc-home { color: var(--ink-soft); text-decoration: none; }
.breadcrumb .bc-home:hover { color: var(--vermilion); }
.bc-sep { color: var(--ink-soft); }
.bc-select {
  font-family: inherit;
  font-size: 0.85rem;
  padding: 4px 10px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 9px;
  background: none;
  border: 1.5px solid var(--ink);
  border-radius: 4px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
  min-width: 0;
}

.brand-seal {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 24px;
  color: #fff;
  background: var(--vermilion);
  border-radius: 6px;
  box-shadow: 2px 2px 0 var(--ink);
  transform: rotate(-3deg);
}

.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-name {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  line-height: 1.3;
}
.brand-sub {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}

.header-link {
  margin-left: auto;
  font-size: 0.82rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}
.header-link:hover { color: var(--vermilion); border-color: var(--vermilion); }

/* ===== layout ===== */
.layout {
  display: flex;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  align-items: flex-start;
}

/* ===== sidebar ===== */
.sidebar {
  width: var(--sidebar-w);
  flex: none;
  position: sticky;
  top: 73px;
  max-height: calc(100vh - 73px);
  overflow-y: auto;
  padding: 22px 18px 28px;
  border-right: 1px solid var(--rule);
}

.sidebar-title {
  margin: 0 0 14px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.cat-block { margin-bottom: 18px; }

.cat-name {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 6px;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: 0.08em;
}

.cat-mark {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  flex: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--vermilion);
  border: 1.5px solid var(--vermilion);
  border-radius: 50%;
}

.tpl-list { list-style: none; margin: 0; padding: 0 0 0 32px; }

.tpl-link {
  display: block;
  width: 100%;
  padding: 5px 8px;
  border: none;
  background: none;
  text-align: left;
  font-family: var(--sans);
  font-size: 0.88rem;
  color: var(--ink);
  cursor: pointer;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
}
.tpl-link:hover { background: var(--paper-deep); }
.tpl-link.active {
  border-left-color: var(--vermilion);
  background: var(--paper-deep);
  font-weight: 700;
}

.sidebar-foot {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px dashed var(--rule);
  font-size: 0.72rem;
  color: var(--ink-soft);
}
.sidebar-foot p { margin: 0 0 4px; }

.sidebar-overlay {
  display: none;
}

/* ===== main / hero ===== */
.main {
  flex: 1;
  min-width: 0;
  padding: clamp(24px, 4vw, 48px) clamp(16px, 4vw, 44px) 64px;
}

.hero { margin-bottom: 40px; }

.hero-kicker {
  margin: 0 0 8px;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--vermilion);
  font-weight: 700;
}

.hero h1 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  line-height: 1.45;
  letter-spacing: 0.03em;
}

.hero h1 em {
  font-style: normal;
  color: var(--vermilion);
  background-image: linear-gradient(transparent 72%, rgba(193, 68, 46, 0.25) 72%);
}

.hero-lead {
  margin: 0 0 26px;
  max-width: 640px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.hero-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 18px 9px 10px;
  font-size: 0.88rem;
  font-weight: 700;
}

.step-no {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: none;
  font-family: var(--serif);
  color: #fff;
  background: var(--ink);
  border-radius: 50%;
  font-size: 0.85rem;
}

/* ===== hero benefits ===== */
.hero-benefits {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 4px 0 28px;
}

.benefit {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  flex: 1 1 200px;
  padding: 12px 16px;
}

.benefit-icon {
  font-size: 0.75rem;
  color: var(--vermilion);
  padding-top: 3px;
  flex: none;
}

.benefit-title {
  margin: 0 0 2px;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 0.92rem;
  letter-spacing: 0.05em;
}

.benefit-text {
  margin: 0;
  font-size: 0.78rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.content-lang-note {
  margin: -16px 0 20px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--vermilion);
}
.content-lang-note:empty { display: none; }

.hero-fork {
  margin: 0 0 24px;
}
.fork-intro {
  margin: 0 0 10px;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.fork-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.fork-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  text-decoration: none;
  background: var(--card);
  border: 1.5px solid var(--ink);
  border-radius: 8px;
  box-shadow: 3px 3px 0 var(--rule);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.fork-card-loop { box-shadow: 3px 3px 0 var(--vermilion); }
.fork-card:hover { transform: translate(1px, 1px); box-shadow: 2px 2px 0 var(--rule); }
.fork-card-loop:hover { box-shadow: 2px 2px 0 var(--vermilion); }
.fork-card:active { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--rule); }
.fork-q {
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
}
.fork-a {
  font-family: var(--sans);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--vermilion);
}
@media (max-width: 640px) {
  .fork-cards { grid-template-columns: 1fr; }
}

.hero-categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 12px;
}

.hero-cat {
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  text-align: left;
  cursor: pointer;
  font-family: var(--sans);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.hero-cat:hover {
  transform: translateY(-2px);
  border-color: var(--vermilion);
  box-shadow: 0 6px 14px rgba(43, 38, 32, 0.12);
}
.hero-cat .hc-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 4px;
}
.hero-cat .hc-count { font-size: 0.75rem; color: var(--ink-soft); }

/* ===== workbench ===== */
.workbench {
  scroll-margin-top: 96px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-bottom: 56px;
}

.panes {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  align-items: flex-start;
}

.form-pane, .preview-pane {
  flex: 1 1 340px;
  min-width: 0;
}

.pane-label {
  margin: 0 0 10px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: var(--ink-soft);
}

.template-head { margin-bottom: 18px; }

.template-category {
  margin: 0;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--vermilion);
  letter-spacing: 0.1em;
}

.template-head h2 {
  margin: 2px 0 6px;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 0.04em;
}

.template-desc {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

#tplForm { display: flex; flex-direction: column; gap: 16px; }

.field { display: flex; flex-direction: column; gap: 6px; }

.field-label {
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.req-badge {
  font-size: 0.66rem;
  font-weight: 700;
  color: #fff;
  background: var(--vermilion);
  padding: 1px 7px;
  border-radius: 3px;
  letter-spacing: 0.08em;
}

.field input[type="text"],
.field textarea,
.field select {
  width: 100%;
  font-family: var(--sans);
  font-size: 0.92rem;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 10px 12px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field textarea { min-height: 96px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--vermilion);
  box-shadow: 0 0 0 3px rgba(193, 68, 46, 0.14);
}

.form-note {
  font-size: 0.72rem;
  color: var(--ink-soft);
  margin: 4px 0 0;
}

/* ===== letter preview ===== */
.letter {
  position: relative;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  box-shadow: 0 10px 24px rgba(43, 38, 32, 0.12), 0 2px 6px rgba(43, 38, 32, 0.08);
  padding: 6px;
}

.letter::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  pointer-events: none;
}

.letter-body {
  margin: 0;
  padding: 22px 22px 26px;
  min-height: 280px;
  max-height: 520px;
  overflow-y: auto;
  font-family: var(--sans);
  font-size: 0.88rem;
  line-height: 1.9;
  white-space: pre-wrap;
  word-break: break-word;
  background-image: repeating-linear-gradient(0deg, transparent 0 calc(1.9em - 1px), rgba(193, 68, 46, 0.12) calc(1.9em - 1px) 1.9em);
}

.letter-body .ph {
  color: var(--vermilion);
  background: rgba(193, 68, 46, 0.08);
  border-bottom: 1px dashed var(--vermilion);
  padding: 0 2px;
}

/* ===== actions ===== */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 18px;
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 22px 10px 10px;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  background: var(--ink);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--vermilion);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.copy-btn:hover { transform: translate(1px, 1px); box-shadow: 2px 2px 0 var(--vermilion); }
.copy-btn:active { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--vermilion); }

.copy-seal {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 17px;
  background: var(--vermilion);
  border-radius: 5px;
  transform: rotate(-4deg);
}

.copy-btn.copied .copy-seal { animation: stamp 0.45s ease; }

@keyframes stamp {
  0% { transform: rotate(-4deg) scale(1); }
  35% { transform: rotate(-4deg) scale(1.5); }
  60% { transform: rotate(-4deg) scale(0.92); }
  100% { transform: rotate(-4deg) scale(1); }
}

.reset-btn {
  padding: 10px 18px;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-soft);
  background: none;
  border: 1.5px solid var(--rule);
  border-radius: 8px;
  cursor: pointer;
}
.reset-btn:hover { border-color: var(--ink); color: var(--ink); }

.copy-done {
  margin: 12px 0 0;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--vermilion);
}

/* ===== code blocks (markdown pages) ===== */
.page-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--paper-deep);
  padding: 1px 6px;
  border-radius: 4px;
}
.page-content pre {
  position: relative;
  margin: 18px 0;
  padding: 16px 18px;
  background: var(--ink);
  border-radius: 8px;
  overflow-x: auto;
}
.page-content pre.has-copy { padding-top: 44px; }
.page-content pre code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.65;
  color: #f3ead8;
  background: none;
  padding: 0;
  border-radius: 0;
  white-space: pre;
}
.code-copy-btn {
  position: absolute;
  top: 9px;
  right: 9px;
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 700;
  line-height: 1;
  padding: 6px 12px;
  color: var(--ink);
  background: var(--card);
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 2px 2px 0 var(--vermilion);
  transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease, color 0.1s ease;
}
.code-copy-btn:hover { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--vermilion); }
.code-copy-btn:active { transform: translate(2px, 2px); box-shadow: 0 0 0 var(--vermilion); }
.code-copy-btn.copied { background: var(--vermilion); color: #fff; border-color: var(--vermilion-deep); }

/* ===== about ===== */
.about {
  border-top: 2px solid var(--ink);
  padding-top: 28px;
}

.about h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.3rem;
  margin: 0 0 18px;
}

.about-mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: none;
  font-size: 15px;
  color: var(--vermilion);
  border: 1.5px solid var(--vermilion);
  border-radius: 50%;
}

.about-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.about-cols h3 {
  font-family: var(--serif);
  font-size: 1rem;
  margin: 0 0 6px;
  letter-spacing: 0.06em;
}

.about-cols p {
  margin: 0;
  font-size: 0.86rem;
  color: var(--ink-soft);
}

/* ===== links section ===== */
.links {
  border-top: 2px solid var(--ink);
  padding-top: 28px;
}

.links h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.3rem;
  margin: 0 0 18px;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.links-group-title {
  font-family: var(--serif);
  font-size: 1rem;
  margin: 0 0 10px;
  letter-spacing: 0.06em;
}

.links-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.links-list a {
  color: var(--vermilion);
  text-decoration: none;
  font-size: 0.92rem;
}

.links-list a:hover { text-decoration: underline; }

.link-note {
  font-size: 0.82rem;
  color: var(--ink-soft);
}

/* ===== static pages (about/privacy/terms) ===== */
.page-content {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px) clamp(16px, 4vw, 36px) 72px;
}
.page-content h1 {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.7rem;
  letter-spacing: 0.04em;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 10px;
  margin: 0 0 24px;
}
.page-content h2 {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.15rem;
  margin: 32px 0 10px;
}
.page-content p, .page-content li {
  font-size: 0.92rem;
  color: var(--ink);
}
.page-content a { color: var(--vermilion); }

/* ===== topic cards (markdown pages) ===== */
.page-content .topic {
  background: var(--card);
  border: 1.5px solid var(--ink);
  border-left: 5px solid var(--vermilion);
  box-shadow: 4px 4px 0 var(--rule);
  border-radius: 2px;
  padding: 6px 26px 26px;
  margin: 0 0 30px;
}
.page-content .topic:nth-of-type(even) {
  background: var(--paper-deep);
  border-left-color: var(--ink);
}
.page-content .topic > h2 {
  margin-top: 22px;
}
.page-content .topic > *:last-child {
  margin-bottom: 0;
}
@media (max-width: 860px) {
  .page-content .topic {
    padding: 4px 18px 20px;
  }
}

/* ===== header nav (page-template) ===== */
.header-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-left: auto;
}
.header-nav a {
  font-size: 0.82rem;
  color: var(--ink-soft);
  text-decoration: none;
  white-space: nowrap;
}
.header-nav a:hover { color: var(--vermilion); }

/* ===== footer ===== */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: 20px clamp(16px, 4vw, 36px);
  text-align: center;
  font-size: 0.78rem;
  color: var(--ink-soft);
}
.site-footer a { color: var(--ink-soft); }
.site-footer a:hover { color: var(--vermilion); }
.site-version { margin-top: 6px; font-size: 0.7rem; opacity: 0.65; }

/* ===== mobile ===== */
@media (max-width: 860px) {
  .menu-toggle { display: flex; }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    max-height: 100vh;
    z-index: 60;
    background: var(--paper);
    border-right: 2px solid var(--ink);
    transform: translateX(-105%);
    transition: transform 0.22s ease;
    box-shadow: 8px 0 24px rgba(43, 38, 32, 0.2);
    width: min(var(--sidebar-w), 84vw);
  }
  .sidebar.open { transform: translateX(0); }

  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 50;
    background: rgba(43, 38, 32, 0.4);
  }
  .sidebar-overlay[hidden] { display: none; }

  .header-link { display: none; }

  .workbench { gap: 30px; }

  .hero-benefits { gap: 10px; }
  .benefit { flex: 1 1 100%; }

  .field input[type="text"],
  .field textarea,
  .field select {
    min-height: 44px;
    font-size: 1rem;
  }

  .copy-btn, .reset-btn {
    min-height: 48px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .copy-btn { flex: 1; justify-content: center; }

  .actions { flex-direction: column; align-items: stretch; }
}

/* ===== prompt-options ===== */
.prompt-options {
  border-top: 1px solid var(--rule);
  margin-top: 4px;
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.opt-title {
  margin: 0 0 2px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
}

.opt-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.opt-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.opt-hint {
  margin: 0;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--ink-soft);
}
.opt-hint-check {
  margin-left: 24px;
}

.opt-model-label {
  font-size: 0.83rem;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.opt-model {
  font-family: var(--sans);
  font-size: 0.83rem;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 5px 10px;
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.opt-model:focus {
  outline: none;
  border-color: var(--vermilion);
  box-shadow: 0 0 0 3px rgba(193, 68, 46, 0.14);
}

.opt-check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.83rem;
  color: var(--ink);
  cursor: pointer;
  padding: 4px 0;
  user-select: none;
}
.opt-check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  flex: none;
  accent-color: var(--vermilion);
  cursor: pointer;
}

/* ===== skill tabs & cards (skill-merits / ai-skills) ===== */
.skill-tabs { margin: 22px 0 34px; }

/* 駅の方向幕／案内表示板スタイルのタブ */
.skill-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  background: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 5px;
  padding: 5px;
  margin-bottom: 22px;
  box-shadow: 4px 4px 0 rgba(43, 38, 32, 0.2);
}
.skill-tab {
  font-family: var(--sans);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #c8bca3;
  background: transparent;
  border: none;
  border-radius: 3px;
  padding: 9px 17px;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.18s ease, background 0.18s ease;
}
.skill-tab:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}
.skill-tab.is-active {
  color: #fff;
  background: var(--vermilion);
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.22);
}
.skill-tab:focus-visible {
  outline: 2px solid var(--vermilion);
  outline-offset: 2px;
}

.skill-panel { animation: skillFade 0.22s ease; }
.skill-panel[hidden] { display: none; }
.skill-panel-intro {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin: 0 0 18px;
  line-height: 1.8;
  padding-left: 13px;
  border-left: 3px solid var(--rule);
}

.skill-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
  gap: 16px;
}

/* きっぷ（切符）スタイルのカード */
.skill-card {
  background: #fffdf8;
  border: 1.5px solid var(--ink);
  border-radius: 3px;
  padding: 0;
  box-shadow: 3px 3px 0 rgba(43, 38, 32, 0.16);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.skill-card-name {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--ink);
  padding: 14px 16px 0;
  border-left: 4px solid var(--vermilion);
}
.skill-card-desc {
  font-size: 0.82rem;
  color: var(--ink-soft);
  line-height: 1.65;
  margin: 0;
  padding: 8px 16px 13px;
  border-left: 4px solid var(--vermilion);
}
.skill-card-pro,
.skill-card-con {
  font-size: 0.8rem;
  line-height: 1.55;
  margin: 0;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 16px;
  background: rgba(43, 38, 32, 0.025);
}
.skill-card-desc + .skill-card-pro,
.skill-card-desc + .skill-card-con {
  border-top: 1.5px dashed var(--rule);
  padding-top: 12px;
}
.skill-card-pro:last-child,
.skill-card-con:last-child {
  padding-bottom: 14px;
}
.skill-tag {
  flex: 0 0 auto;
  min-width: 5.2em;
  text-align: center;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}
.skill-tag-pro { color: #2f6b45; background: #e4efe4; }
.skill-tag-con { color: var(--vermilion-deep); background: #f4e0d9; }
.skill-tag-use { color: #5a4a2f; background: #efe7d6; }
.skill-tag-fit { color: #3a5566; background: #dde7ec; }
.skill-card-link { font-size: 0.78rem; margin: 2px 0 0; }
.skill-card code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.74rem;
  background: rgba(43, 38, 32, 0.07);
  padding: 1px 5px;
  border-radius: 4px;
  white-space: nowrap;
}
@keyframes skillFade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}
@media (max-width: 560px) {
  .skill-cards { grid-template-columns: 1fr; }
  .skill-tab { font-size: 0.8rem; padding: 8px 13px; }
}

/* ===== usage mode switch (simple / pro) ===== */
.mode-switch {
  display: flex;
  width: 100%;
  max-width: 520px;
  align-self: flex-start;
  margin-bottom: 2px;
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  overflow: hidden;
  background: var(--card);
  box-shadow: 3px 3px 0 var(--rule);
}
.mode-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 9px 14px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--serif);
  color: var(--ink);
  transition: background 0.15s ease, color 0.15s ease;
}
.mode-btn + .mode-btn { border-left: 1.5px solid var(--rule); }
.mode-btn.is-active { background: var(--vermilion); color: #fff; }
.mode-btn.is-active .mode-desc { color: rgba(255, 255, 255, 0.82); }
.mode-name { font-size: 0.98rem; font-weight: 800; letter-spacing: 0.1em; }
.mode-desc {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
}

/* ===== pro options（技法指定票） ===== */
.pro-options {
  margin-top: 18px;
  padding: 18px 20px 22px;
  background: var(--paper-deep);
  border: 1.5px solid var(--ink);
  border-left: 5px solid var(--vermilion);
  box-shadow: 4px 4px 0 var(--rule);
  border-radius: 2px;
  display: flex;
  flex-direction: column;
  gap: 17px;
}
.opt-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
}
.opt-seal {
  flex: none;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1rem;
  color: #fff;
  background: var(--vermilion);
  border-radius: 3px;
  box-shadow: 2px 2px 0 var(--vermilion-deep);
}
.pro-options .opt-title {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--ink);
}
.opt-field-label {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--serif);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--ink);
}
.pro-options .opt-field-label::before {
  content: "";
  flex: none;
  width: 4px;
  height: 15px;
  background: var(--vermilion);
  border-radius: 1px;
}
.opt-item > .opt-field-label { margin-bottom: 6px; }
.opt-input {
  width: 100%;
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 10px 13px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.opt-input:focus {
  outline: none;
  border-color: var(--vermilion);
  box-shadow: 0 0 0 3px rgba(193, 68, 46, 0.14);
}
.opt-sentence {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0;
}
.opt-sentence-text {
  font-size: 0.92rem;
  color: var(--ink);
  white-space: nowrap;
}
.opt-input.opt-blank {
  flex: 1;
  width: auto;
  min-width: 11em;
}
.opt-model-full {
  width: 100%;
  font-size: 0.9rem;
  padding: 10px 13px;
}
.opt-grid3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}
.opt-sub {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.opt-sub > span {
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}
.pro-options .opt-check {
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 600;
}

/* few-shot examples */
.shots { display: flex; flex-direction: column; gap: 10px; }
.shot-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 10px;
  border: 1px dashed var(--rule);
  border-radius: 8px;
  background: rgba(251, 247, 238, 0.5);
}
.shot-row textarea {
  width: 100%;
  min-height: 60px;
  resize: vertical;
  font-family: var(--sans);
  font-size: 0.86rem;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 8px 10px;
}
.shot-row textarea:focus {
  outline: none;
  border-color: var(--vermilion);
  box-shadow: 0 0 0 3px rgba(193, 68, 46, 0.14);
}
.shot-remove {
  grid-column: 1 / -1;
  justify-self: end;
  font-family: var(--sans);
  font-size: 0.74rem;
  color: var(--ink-soft);
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 4px;
}
.shot-remove:hover { color: var(--vermilion); }
.shot-add {
  align-self: flex-start;
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--vermilion);
  background: none;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  transition: border-color 0.15s ease;
}
.shot-add:hover { border-color: var(--vermilion); }
.shot-add:disabled { color: var(--ink-soft); cursor: default; opacity: 0.6; }

/* editable preview */
#preview[contenteditable="true"] {
  outline: 2px dashed var(--vermilion);
  outline-offset: 4px;
  cursor: text;
  background: rgba(255, 255, 255, 0.45);
}
#editToggle.is-active { border-color: var(--vermilion); color: var(--vermilion); }

@media (max-width: 560px) {
  .mode-switch { max-width: none; }
  .opt-grid3 { grid-template-columns: 1fr; }
  .shot-row { grid-template-columns: 1fr; }
}