:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --ink: #1b1e28;
  --ink-soft: #4a4f60;
  --border: #e2e5ec;
  --accent: #4f46e5;
  --accent-soft: #eae8fb;
  --ok: #0d9488;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}

.container {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px;
}

/* header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  text-decoration: none;
}
.site-nav { display: flex; align-items: center; gap: 16px; font-size: .9rem; }
.site-nav a { color: var(--accent); text-decoration: none; }
.site-nav a:hover { text-decoration: underline; }
.nav-user { font-weight: 600; }
.nav-muted { color: var(--ink-soft); }

/* messages */
.messages { list-style: none; padding: 0; margin: 16px 0 0; }
.msg {
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--accent-soft);
  margin-bottom: 8px;
}

/* main */
main { padding: 40px 20px 64px; }

.hero { margin-bottom: 32px; }
.hero h1 { font-size: 1.9rem; margin: 0 0 12px; letter-spacing: .01em; }
.hero .lead { color: var(--ink-soft); font-size: 1.05rem; margin: 0; max-width: 60ch; }

.status-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 26px;
  box-shadow: 0 1px 2px rgba(20,22,30,.04), 0 4px 14px rgba(20,22,30,.04);
}
.status-card h2 { margin: 0 0 10px; font-size: 1.15rem; }

.todo-list { list-style: none; padding: 0; margin: 16px 0 0; }
.todo-list li {
  position: relative;
  padding: 6px 6px 6px 30px;
  color: var(--ink-soft);
  border-top: 1px solid var(--border);
}
.todo-list li::before {
  content: "○";
  position: absolute;
  left: 6px;
  color: var(--ink-soft);
}
.todo-list li.done { color: var(--ink); }
.todo-list li.done::before { content: "✓"; color: var(--ok); font-weight: 700; }

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  color: var(--ink-soft);
}

/* --- nav buttons --- */
.logout-form { display: inline; margin: 0; }
.linkbtn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
  padding: 0;
}
.linkbtn:hover { text-decoration: underline; }

/* --- buttons --- */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 9px 18px;
  border: none;
  border-radius: 9px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn-x {
  background: #111;
}
.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-ghost:hover { background: var(--accent-soft); filter: none; }
.cta-row { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }

/* --- forms --- */
.auth-card, .form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 30px;
  max-width: 460px;
  margin: 8px auto;
  box-shadow: 0 1px 2px rgba(20,22,30,.04), 0 4px 14px rgba(20,22,30,.04);
}
.form-card { max-width: 560px; }
.auth-card h1, .form-card h1 { margin: 0 0 18px; font-size: 1.4rem; }
.form-lead { color: var(--ink-soft); font-size: .9rem; margin: -8px 0 18px; }
.form-row { margin-bottom: 16px; display: flex; flex-direction: column; gap: 5px; }
.form-row label { font-weight: 600; font-size: .9rem; }
.form-row input[type="text"],
.form-row input[type="email"],
.form-row input[type="password"],
.form-row input[type="url"],
.form-row textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: var(--bg);
}
.form-row input:focus, .form-row textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}
.form-row .help { color: var(--ink-soft); font-size: .8rem; }
.form-row .errorlist { color: #be123c; font-size: .82rem; margin: 2px 0 0; padding-left: 18px; }
.auth-alt { margin-top: 18px; font-size: .9rem; color: var(--ink-soft); }

/* --- page head --- */
.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.page-head h1 { font-size: 1.7rem; margin: 0; }

/* --- wiki list --- */
.wiki-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 14px; }
.wiki-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}
.wiki-title { font-size: 1.15rem; font-weight: 700; color: var(--ink); text-decoration: none; }
.wiki-title:hover { color: var(--accent); }
.wiki-desc { color: var(--ink-soft); margin: 6px 0; }
.wiki-meta { color: var(--ink-faint, var(--ink-soft)); font-size: .82rem; }

/* --- wiki detail --- */
.cover {
  width: 100%;
  max-height: 280px;
  object-fit: cover;
  border-radius: 14px;
  margin-bottom: 18px;
}
.prose { margin: 14px 0 8px; color: var(--ink); }
.block { margin-top: 34px; }
.block h2 {
  font-size: 1.15rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}
.page-list, .work-list { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 8px; }
.cat-tag {
  display: inline-block;
  font-size: .72rem;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 1px 8px;
  border-radius: 20px;
  margin-right: 6px;
}
.work-list a { color: var(--accent); }
.empty { color: var(--ink-soft); }

/* --- work cards --- */
.work-cards { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 14px; }
.work-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}
.work-title { font-size: 1.1rem; font-weight: 700; color: var(--accent); text-decoration: none; }
.work-title:hover { text-decoration: underline; }
.work-meta { color: var(--ink-soft); font-size: .85rem; margin: 6px 0; }
.work-meta a { color: var(--accent); }
.work-summary { margin: 6px 0 12px; }
.work-actions { display: flex; gap: 14px; align-items: center; }
.linkbtn.danger { color: #be123c; }

/* --- pagination --- */
.pagination { display: flex; gap: 16px; align-items: center; margin-top: 22px; color: var(--ink-soft); }
.pagination a { color: var(--accent); text-decoration: none; }

/* --- select / textarea --- */
.form-row select {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: var(--bg);
}
.wide-form { max-width: 760px; }
.form-actions { display: flex; gap: 12px; align-items: center; }
.md-hint { color: var(--ink-soft); font-size: .82rem; margin: -4px 0 14px; }
.md-hint code { background: var(--surface-2); padding: 0 4px; border-radius: 4px; }

/* --- breadcrumb / heads --- */
.crumb { font-size: .85rem; color: var(--ink-soft); margin: 0 0 6px; }
.crumb a { color: var(--accent); text-decoration: none; }
.head-actions { display: flex; gap: 10px; align-items: center; }
.block-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.block-head h2 { border: none; padding: 0; }
.btn-sm { padding: 6px 12px; font-size: .85rem; border-radius: 8px; }

/* --- prose (Markdown output) --- */
.md-body { line-height: 1.8; }
.md-body h1, .md-body h2, .md-body h3 { line-height: 1.3; margin: 1.4em 0 .5em; }
.md-body h1 { font-size: 1.5rem; }
.md-body h2 { font-size: 1.25rem; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.md-body h3 { font-size: 1.1rem; }
.md-body p { margin: .8em 0; }
.md-body ul, .md-body ol { padding-left: 1.4em; }
.md-body li { margin: .3em 0; }
.md-body a { color: var(--accent); }
.md-body code {
  background: var(--surface-2);
  padding: 1px 5px;
  border-radius: 5px;
  font-family: var(--font-mono, ui-monospace, Menlo, Consolas, monospace);
  font-size: .9em;
}
.md-body pre {
  background: var(--surface-2);
  padding: 14px 16px;
  border-radius: 10px;
  overflow-x: auto;
}
.md-body pre code { background: none; padding: 0; }
.md-body blockquote {
  border-left: 3px solid var(--border);
  margin: 1em 0;
  padding: 2px 0 2px 14px;
  color: var(--ink-soft);
}
.md-body table { border-collapse: collapse; margin: 1em 0; }
.md-body th, .md-body td { border: 1px solid var(--border); padding: 6px 10px; }

.old-notice {
  background: #fff7e6;
  border: 1px solid #f0d9a8;
  color: #7c4a03;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: .9rem;
}
.rev-label { color: var(--ink-soft); font-weight: 400; }

/* --- history table --- */
.table-scroll { overflow-x: auto; }
.history { border-collapse: collapse; width: 100%; margin-top: 18px; font-size: .9rem; }
.history th, .history td { border-bottom: 1px solid var(--border); padding: 9px 12px; text-align: left; vertical-align: top; }
.history th { color: var(--ink-soft); font-weight: 600; }
.history .nowrap { white-space: nowrap; }
.row-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row-actions a { color: var(--accent); text-decoration: none; }
.inline-form { display: inline; margin: 0; }
.badge-current {
  display: inline-block;
  font-size: .68rem;
  background: var(--ok);
  color: #fff;
  padding: 1px 7px;
  border-radius: 20px;
  margin-left: 5px;
}

/* --- diff --- */
.diff {
  margin-top: 16px;
  font-family: var(--font-mono, ui-monospace, Menlo, Consolas, monospace);
  font-size: .85rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: auto;
}
.diff > div { padding: 2px 12px; white-space: pre-wrap; word-break: break-all; }
.d-add { background: #e6f6ea; color: #14622a; }
.d-del { background: #fce8e8; color: #8a1f1f; }
.d-hunk { background: var(--surface-2); color: var(--ink-soft); }
.d-meta { color: var(--ink-faint, var(--ink-soft)); }
.d-ctx { color: var(--ink); }

@media (prefers-color-scheme: dark) {
  .old-notice { background: #33280f; border-color: #6b551f; color: #fbbf24; }
  .d-add { background: #10321a; color: #7ee29a; }
  .d-del { background: #331515; color: #f0a0a0; }
}