/* ============================================================
   SDDTDD 教材 共通レイアウト
   レイアウトは全ページ共通。色だけ各ページの <style> で
   --accent 系変数を上書きしてテーマ分けする。
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent:       #1a3a5c;
  --accent-dark:  #132b43;
  --accent-mid:   #2c5282;
  --accent-light: #3a6ea8;
  --accent-50:    #eaf3fb;
  --accent-100:   #cfe3f5;
  --accent-200:   #9cc0e6;
  --text:        #1a202c;
  --text-muted:  #4a5568;
  --border:      #d4dae1;
  --bg:          #f7f9fb;
  --surface:     #ffffff;
  --code-bg:     #111418;
  --code-text:   #e6edf3;
  --note-bg:     #f4f5f7;
  --note-border: #9aa3af;
  --warn-bg:     #fff8ec;
  --warn-border: #e0a94e;
  --before-bg:   #f4efef;
  --before-border: #cdbaba;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 16px; line-height: 1.75;
  color: var(--text); background: var(--bg);
  overflow-wrap: anywhere; word-break: break-word;
}
a { color: var(--accent-light); text-decoration: underline; }
a:hover { color: var(--accent); }

.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }
main { display: block; }
section { padding: 60px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }

h2 { font-size: clamp(21px, 3vw, 27px); font-weight: 700; color: var(--accent); margin-bottom: 26px; padding-left: 15px; border-left: 5px solid var(--accent); line-height: 1.35; }
h3 { font-size: 18px; font-weight: 700; color: var(--accent); margin: 26px 0 12px; }
h4 { font-size: 16px; font-weight: 700; color: var(--accent); margin: 20px 0 8px; }
p  { margin-bottom: 16px; color: var(--text-muted); }
ul, ol { padding-left: 24px; margin-bottom: 16px; color: var(--text-muted); }
li { margin-bottom: 6px; }

.hero { background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 58%, var(--accent-light) 100%); color: #fff; padding: 72px 0 64px; border-bottom: none; }
.hero-eyebrow { font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-100); margin-bottom: 16px; }
.hero h1 { font-size: clamp(28px, 5vw, 44px); font-weight: 700; line-height: 1.25; letter-spacing: -0.01em; margin-bottom: 16px; }
.hero-sub, .hero .catchcopy { font-size: clamp(16px, 2.5vw, 20px); color: var(--accent-50); margin-bottom: 32px; font-weight: 400; }
.hero-quote { max-width: 640px; background: rgba(255,255,255,0.1); border-left: 4px solid var(--accent-100); border-radius: 0 6px 6px 0; padding: 18px 22px; font-size: 15px; color: #fff; }
.hero-quote cite { display: block; margin-top: 10px; font-size: 13px; color: var(--accent-100); font-style: normal; }

.tool-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 8px; }
.tool-card { background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); border-radius: 8px; padding: 20px 24px; color: #fff; }
.tool-card .badge { display: inline-block; background: var(--accent-100); color: var(--accent-dark); font-size: 0.72rem; font-weight: 700; padding: 2px 10px; border-radius: 12px; margin-bottom: 10px; font-family: 'Noto Sans Mono CJK JP', 'Noto Mono', monospace; }
.tool-card h3 { color: #fff; font-size: 1.05rem; margin: 0 0 8px; }
.tool-card p  { font-size: 0.9rem; color: rgba(255,255,255,0.82); margin: 0; }

.cycle-wrap, .flow-wrap, .pyramid-wrap { background: var(--accent-50); border: 1px solid var(--accent-100); border-radius: 12px; padding: 32px 24px; margin: 28px 0; text-align: center; overflow-x: auto; }
.cycle-svg { max-width: 480px; width: 100%; height: auto; }

.table-wrap { overflow-x: auto; margin: 24px 0; }
table, .compare-table { width: auto; max-width: 100%; table-layout: auto; border-collapse: collapse; font-size: 14px; margin: 0; }
.compare-table { width: 100%; }
th, .compare-table th { background: var(--accent); color: #fff; padding: 10px 16px; text-align: left; font-weight: 700; }
td, .compare-table td { padding: 10px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
tr:nth-child(even) td, .compare-table tr:nth-child(even) td { background: var(--accent-50); }

.tip, .note, .warn { border-radius: 0 6px 6px 0; padding: 16px 20px; margin: 20px 0; font-size: 14px; line-height: 1.75; }
.tip  { background: var(--accent-50); border-left: 4px solid var(--accent-light); }
.tip strong  { color: var(--accent); display: block; margin-bottom: 4px; }
.note { background: var(--note-bg); border-left: 4px solid var(--note-border); }
.note strong { color: var(--text); display: block; margin-bottom: 4px; }
.warn { background: var(--warn-bg); border-left: 4px solid var(--warn-border); }
.warn strong { color: #7a5210; display: block; margin-bottom: 4px; }

.two-col, .ba-grid, .compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 24px 0; }
.col-box { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 24px; }
.col-box h3 { margin-top: 0; }
.col-box ul { padding-left: 18px; font-size: 14px; }

.compare-card { border: 1px solid var(--accent-100); border-radius: 8px; padding: 24px; background: var(--surface); }
.compare-card .card-title { font-size: 1.05rem; font-weight: 700; color: var(--accent); margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--accent-100); }
.compare-card ul { list-style: none; padding-left: 0; }
.compare-card li { padding: 6px 0; font-size: 0.9rem; border-bottom: 1px solid var(--bg); color: var(--text-muted); }
.compare-card li:last-child { border-bottom: none; }
.cmd-chip { display: inline-block; background: var(--accent); color: #fff; font-family: 'Noto Sans Mono CJK JP', 'Noto Mono', monospace; font-size: 0.78rem; padding: 2px 8px; border-radius: 4px; margin: 2px 2px 2px 0; }
.compare-card .card-link { margin-top: 14px; font-size: 0.85rem; }

.ba-card { border-radius: 6px; padding: 18px 20px; font-size: 0.9rem; }
.ba-card.before { background: var(--before-bg); border: 1px solid var(--before-border); }
.ba-card.after  { background: var(--accent-50); border: 1px solid var(--accent-100); }
.ba-card .ba-label { font-weight: 700; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 10px; color: var(--text-muted); }

.steps, .step-list { display: flex; flex-direction: column; gap: 20px; margin: 32px 0; }
.step-card, .step-item { display: grid; grid-template-columns: 52px 1fr; gap: 20px; align-items: start; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 20px 24px; }
.step-num, .step-number { width: 44px; height: 44px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 700; font-size: 18px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.step-content h3, .step-content h4 { margin-top: 0; margin-bottom: 8px; font-size: 16px; }
.step-content p { font-size: 14px; margin-bottom: 8px; }
.step-label { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 0.08em; padding: 2px 8px; border-radius: 3px; margin-bottom: 10px; vertical-align: middle; }
.label-red      { background: #fbe0e0; color: #8a2b2b; }
.label-green    { background: #d6f0da; color: #22543d; }
.label-refactor { background: #e7dcf5; color: #44337a; }
.label-ai       { background: var(--accent-100); color: var(--accent); }

pre.codeblock { background: var(--code-bg); color: var(--code-text); font-family: 'Noto Sans Mono CJK JP', 'Noto Mono', 'Courier New', monospace; font-size: 13.5px; line-height: 1.65; padding: 20px 24px; border-radius: 8px; overflow-x: auto; white-space: pre-wrap; overflow-wrap: anywhere; margin: 12px 0; }
pre.codeblock .comment { color: #8b95a1; }
pre.codeblock .keyword { color: #b5cea8; }
pre.codeblock .string  { color: #ce9178; }
.code-label { font-size: 11px; font-weight: 700; color: var(--text-muted); letter-spacing: 0.08em; margin: 16px 0 4px; }

.reason-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; margin: 28px 0; }
.reason-card { background: var(--surface); border: 1px solid var(--border); border-top: 4px solid var(--accent-mid); border-radius: 8px; padding: 24px; }
.reason-card .num { font-size: 32px; font-weight: 700; color: var(--accent-200); line-height: 1; margin-bottom: 8px; }
.reason-card h3 { margin: 0 0 10px; font-size: 16px; }
.reason-card p  { font-size: 14px; margin: 0; }

.refs, .ref-list { list-style: none; padding: 0; margin: 16px 0; }
.refs li, .ref-list li { padding: 16px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.refs li:last-child, .ref-list li:last-child { border-bottom: none; }
.refs .ref-title { font-weight: 700; color: var(--accent); }
.refs .ref-desc  { color: var(--text-muted); margin-top: 4px; }

details { margin: 16px 0; }
summary { cursor: pointer; font-weight: 700; color: var(--accent); padding: 12px 16px; background: var(--accent-50); border-radius: 6px; list-style: none; user-select: none; }
summary::-webkit-details-marker { display: none; }
summary::before { content: "\25B6  "; font-size: 12px; }
details[open] summary::before { content: "\25BC  "; }
details[open] summary { margin-bottom: 4px; }
details > *:not(summary) { padding: 16px; }
.collapse-box { border: 1px solid var(--accent-100); border-radius: 6px; padding: 4px 16px; margin: 16px 0; background: var(--accent-50); }

@media (max-width: 680px) { .two-col, .ba-grid, .compare-grid, .tool-cards { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .step-card, .step-item { grid-template-columns: 1fr; } .step-num, .step-number { width: 38px; height: 38px; font-size: 15px; } }