/* =========================================================
   Claude 導入マニュアル 共通スタイル
   ========================================================= */

:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f7f7f4;
  --color-bg-card: #ffffff;
  --color-text: #1c2434;
  --color-text-soft: #4a5568;
  --color-muted: #8a93a4;
  --color-border: #e3e6ec;
  --color-accent: #d97757;
  --color-accent-soft: #f7e9e1;
  --color-link: #2b5797;
  --color-warn-bg: #fff8e1;
  --color-warn-border: #f0c969;
  --color-info-bg: #eaf4ed;
  --color-info-border: #8fbf9f;
  --color-danger-bg: #fdecec;
  --color-danger-border: #e08585;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(20, 30, 50, 0.06), 0 4px 12px rgba(20, 30, 50, 0.04);
  --font-sans: "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic",
    "Meiryo", "Noto Sans JP", system-ui, -apple-system, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  --font-mono: Consolas, "Source Code Pro", "Cascadia Code", Menlo,
    "Hiragino Kaku Gothic ProN", monospace;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  background: var(--color-bg-soft);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.02em;
}

a {
  color: var(--color-link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ===== Layout ===== */

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px;
}

.site-header-inner {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.06em;
}

.site-title a {
  color: inherit;
}

.site-title .brand-mark {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
}

.site-nav-mini a {
  font-size: 13px;
  color: var(--color-text-soft);
  margin-left: 16px;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px;
  color: var(--color-muted);
  font-size: 12px;
  text-align: center;
  background: var(--color-bg);
}

/* ===== Typography ===== */

h1, h2, h3, h4 {
  color: var(--color-text);
  line-height: 1.45;
}

h1 {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 28px 0 10px;
  padding-left: 12px;
  border-left: 4px solid var(--color-accent);
}

h4 {
  font-size: 15px;
  font-weight: 600;
  margin: 20px 0 8px;
  color: var(--color-text-soft);
}

p {
  margin: 0 0 14px;
}

ul, ol {
  margin: 0 0 16px;
  padding-left: 1.6em;
}

li {
  margin-bottom: 6px;
}

strong {
  color: var(--color-text);
}

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--color-bg-soft);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
}

/* ===== Chapter heading block ===== */

.chapter-eyebrow {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 6px;
}

.chapter-lead {
  font-size: 15px;
  color: var(--color-text-soft);
  margin: 12px 0 32px;
  padding-left: 16px;
  border-left: 3px solid var(--color-border);
}

/* ===== Card / TOC ===== */

.intro-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.meta-list li {
  font-size: 13px;
  color: var(--color-text-soft);
}

.meta-list strong {
  color: var(--color-text);
  margin-right: 6px;
}

.toc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.toc-card {
  display: block;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 22px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.12s ease, box-shadow 0.12s ease,
    border-color 0.12s ease;
  position: relative;
}

.toc-card:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--color-accent);
}

.toc-card .num {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  font-weight: 700;
}

.toc-card h3 {
  margin: 4px 0 8px;
  padding: 0;
  border: none;
  font-size: 16px;
}

.toc-card p {
  font-size: 13px;
  color: var(--color-text-soft);
  margin: 0;
  line-height: 1.7;
}

.toc-recommend {
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 32px 0 0;
  font-size: 14px;
}

.toc-recommend strong {
  color: var(--color-accent);
}

/* ===== Callouts ===== */

.callout {
  border-left: 4px solid var(--color-info-border);
  background: var(--color-info-bg);
  padding: 14px 18px;
  border-radius: 4px;
  margin: 18px 0;
  font-size: 14.5px;
}

.callout.warn {
  border-left-color: var(--color-warn-border);
  background: var(--color-warn-bg);
}

.callout.danger {
  border-left-color: var(--color-danger-border);
  background: var(--color-danger-bg);
}

.callout .label {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  margin-right: 8px;
  padding: 2px 8px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.6);
  color: var(--color-text);
  vertical-align: middle;
}

/* ===== Prompt blocks ===== */

.prompt {
  background: #2b3142;
  color: #f3f5fa;
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 14px 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.prompt-label {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  font-weight: 700;
  margin: 14px 0 4px;
}

.example-pair {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 16px 0;
  background: var(--color-bg-card);
}

.example-pair .bad {
  color: #a04545;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.12em;
}

.example-pair .good {
  color: #2c7a4e;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.12em;
}

.example-pair p {
  margin: 4px 0 14px;
}

/* ===== Tables ===== */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

th, td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

th {
  background: var(--color-bg-soft);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.04em;
}

tr:last-child td {
  border-bottom: none;
}

/* ===== Step lists ===== */

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 16px 0;
}

.steps > li {
  position: relative;
  padding: 14px 16px 14px 56px;
  margin-bottom: 10px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  counter-increment: step;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 14px;
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}

/* ===== Chapter navigation ===== */

.chapter-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 48px 0 0;
  padding: 16px 0;
  border-top: 1px solid var(--color-border);
  font-size: 13.5px;
}

.chapter-nav a {
  color: var(--color-text-soft);
  padding: 8px 12px;
  border-radius: 6px;
  transition: background 0.1s ease;
}

.chapter-nav a:hover {
  background: var(--color-bg-soft);
  text-decoration: none;
  color: var(--color-accent);
}

.chapter-nav .spacer {
  color: var(--color-muted);
}

.chapter-nav .center a {
  font-weight: 600;
}

/* ===== Summary box ===== */

.summary {
  background: var(--color-accent-soft);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-top: 40px;
  border-left: 4px solid var(--color-accent);
}

.summary h3 {
  margin-top: 0;
  padding-left: 0;
  border-left: none;
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.summary ul {
  margin: 0;
  padding-left: 1.4em;
}

/* ===== Placeholders ===== */

.placeholder {
  display: inline-block;
  background: #fff4d6;
  border: 1px dashed #c5a447;
  color: #6c5316;
  padding: 1px 8px;
  border-radius: 3px;
  font-size: 0.9em;
  font-weight: 600;
}

.screenshot-placeholder {
  background: repeating-linear-gradient(
    45deg,
    #f1f1ef,
    #f1f1ef 8px,
    #e7e7e3 8px,
    #e7e7e3 16px
  );
  border: 1px dashed #b8bcc4;
  border-radius: var(--radius);
  padding: 36px 16px;
  text-align: center;
  color: var(--color-muted);
  font-size: 13px;
  margin: 14px 0;
}

figure.screenshot {
  margin: 18px 0;
  padding: 0;
  text-align: center;
}

figure.screenshot img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border: 1px solid #d7d8d2;
  border-radius: var(--radius);
  background: #fff;
}

figure.screenshot figcaption {
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.5;
}

/* ===== Responsive ===== */

@media (max-width: 640px) {
  body {
    font-size: 15px;
    line-height: 1.75;
  }
  .page {
    padding: 24px 16px 56px;
  }
  h1 {
    font-size: 23px;
  }
  h2 {
    font-size: 19px;
    margin-top: 36px;
  }
  h3 {
    font-size: 15.5px;
  }
  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .site-nav-mini a {
    margin-left: 0;
    margin-right: 14px;
  }
  .toc-grid {
    grid-template-columns: 1fr;
  }
  .chapter-nav {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
  .steps > li {
    padding-left: 50px;
  }
}

/* ===== Print ===== */

@media print {
  body {
    background: #fff;
    color: #000;
    font-size: 11pt;
    line-height: 1.6;
  }
  .site-header,
  .site-footer,
  .chapter-nav {
    display: none;
  }
  .page {
    max-width: 100%;
    padding: 0;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
  .toc-card,
  .intro-card,
  .summary,
  .callout {
    page-break-inside: avoid;
  }
  h2, h3 {
    page-break-after: avoid;
  }
  .prompt {
    background: #f4f4f4;
    color: #000;
    border: 1px solid #ccc;
  }
}