/* ==========================================================================
   生成AIガイドラインメーカー -- style
   NOVELデザインガイドライン フル適用（正本: templates/brand_design_guideline.md）
   - NOVEL Blue #007ECA / Cyan #74D8EC / Deep Navy #004873 / Ink #080808
   - シグネチャーグラデ 135deg固定・角丸4px（ピルはタグのみ128px）
   - ドロップシャドウ禁止（枠線1px #E3E3E3と色面で立体感）・暖色禁止（エラー赤のみ例外）
   - Noto Sans JP + Outfit ／ 面積比 白70% グラデ青20% ダーク10%
   - CSS変数は assets/tokens.css（--nvl-*）を使用
   ========================================================================== */

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--nvl-font-ja);
  font-weight: 400;
  color: var(--nvl-ink);
  background: #fff;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--nvl-blue); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---- ヘッダー（白地・ロゴ左） ------------------------------------------ */
.site-head { background: #fff; border-bottom: 1px solid var(--nvl-border); }
.head-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.02rem; letter-spacing: 0.05em; color: var(--nvl-ink);
}
.brand::before {
  content: ""; width: 14px; height: 14px; border-radius: 2px;
  background: var(--nvl-gradient); flex: 0 0 auto;
}
.head-link {
  color: var(--nvl-text); text-decoration: none;
  font-size: 14px; font-weight: 500; letter-spacing: 0.1em;
}
.head-link:hover { color: var(--nvl-blue); }

/* ---- ヒーロー（50/50スプリット: 左テキスト＋右グラデ面） ---------------- */
.hero { background: #fff; border-bottom: 1px solid var(--nvl-border); }
.hero .wrap.hero-split {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 0; align-items: stretch; padding: 0 20px;
}
.hero-copy { padding: 72px 48px 72px 0; }
.hero-label {
  display: block; font: 500 14px var(--nvl-font-ja); letter-spacing: 0.1em;
  color: var(--nvl-blue); margin-bottom: 18px;
}
.hero h1 {
  margin: 0 0 18px; font-size: 2.1rem; font-weight: 700;
  line-height: 1.4; letter-spacing: 0.05em; color: var(--nvl-ink);
}
.hero .hl {
  background: var(--nvl-gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede { margin: 0; max-width: 560px; color: var(--nvl-text); font-size: 1rem; line-height: 2.0; }

.hero-visual {
  background: var(--nvl-gradient);
  position: relative; min-height: 300px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-visual-en {
  font: 200 clamp(28px, 4vw, 44px) var(--nvl-font-en);
  color: #fff; letter-spacing: 0.03em; line-height: 1.4; text-align: left;
}
.hero-doc {
  position: absolute; inset: auto 48px 40px auto; width: 150px;
  border-top: 1px solid var(--nvl-line-on-dark); padding-top: 10px;
}
.hero-doc i {
  display: block; height: 1px; background: var(--nvl-line-on-dark); margin: 10px 0;
}
.hero-doc i:nth-child(2) { width: 78%; }
.hero-doc i:nth-child(3) { width: 90%; }
.hero-doc i:nth-child(4) { width: 60%; }

/* ---- セクション見出しの型（英語ラベル＋日本語小ラベル） ----------------- */
.sec-head { margin: 72px 0 28px; }
.sec-en {
  display: block; font-family: var(--nvl-font-en); font-weight: 500;
  font-size: clamp(44px, 7vw, 72px); letter-spacing: 0.03em; line-height: 1.2;
  background: var(--nvl-gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.sec-ja {
  display: block; margin: 6px 0 0; font-size: 14px; font-weight: 500;
  letter-spacing: 0.1em; color: var(--nvl-ink);
}
h2.sec-ja { margin: 6px 0 0; }

/* ---- ステッパー --------------------------------------------------------- */
.stepper { list-style: none; display: flex; gap: 10px; padding: 0; margin: 0 0 20px; }
.stepper .st {
  flex: 1; display: flex; align-items: center; gap: 10px; justify-content: center;
  padding: 12px 8px; background: #fff; border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius); font-size: 14px; letter-spacing: 0.1em;
  color: var(--nvl-text); cursor: pointer; user-select: none; font-weight: 500; text-align: center;
}
.stepper .st-n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 2px; background: var(--nvl-bg-light);
  color: var(--nvl-text); font-family: var(--nvl-font-en); font-weight: 500;
  font-size: 0.85rem; flex: 0 0 auto; letter-spacing: 0;
}
.stepper .st.is-active { color: var(--nvl-ink); border-color: var(--nvl-blue); background: var(--nvl-tint-blue); }
.stepper .st.is-active .st-n { background: var(--nvl-gradient); color: #fff; }
.stepper .st.is-done { color: var(--nvl-text); }
.stepper .st.is-done .st-n { background: var(--nvl-navy); color: #fff; }

/* ---- カード / ステップ -------------------------------------------------- */
.card {
  background: #fff; border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius); padding: 32px 28px; margin-bottom: 24px;
}
.step-title { margin: 0 0 22px; font-size: 24px; font-weight: 700; letter-spacing: 0.05em; color: var(--nvl-ink); }

.field { margin-bottom: 26px; }
.field-label { display: block; font-weight: 700; margin-bottom: 10px; color: var(--nvl-ink); font-size: 1rem; letter-spacing: 0.05em; }
.field-label small { font-weight: 400; color: var(--nvl-text); font-size: 0.8rem; margin-left: 8px; letter-spacing: 0.05em; }

/* 選択ピル（タグ扱い: ピル形128px可） */
.opt-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.opt {
  border: 1px solid var(--nvl-border); background: #fff; color: var(--nvl-ink);
  padding: 10px 18px; border-radius: var(--nvl-radius-pill); font-size: 0.92rem;
  cursor: pointer; font-family: inherit; letter-spacing: 0.03em; line-height: 1.4;
  transition: border-color .12s, background .12s, color .12s;
}
.opt:hover { border-color: var(--nvl-blue); background: var(--nvl-tint-blue); }
.opt.is-sel { background: var(--nvl-blue); border-color: var(--nvl-blue); color: #fff; font-weight: 500; }

.other-tool { margin-top: 14px; display: flex; flex-direction: column; gap: 6px; max-width: 340px; }
.other-tool label { font-size: 0.82rem; color: var(--nvl-text); letter-spacing: 0.05em; }
.other-tool input {
  padding: 10px 12px; border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius); font: inherit; background: #fff;
}
.other-tool input:focus { outline: none; border-color: var(--nvl-blue); }

/* ---- ボタン（tokens.css の .nvl-btn-* を基準に補助修飾のみ） ------------- */
.nvl-btn-primary:hover { opacity: 0.88; }
.nvl-btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.nvl-btn-secondary:hover { background: var(--nvl-tint-blue); }
.nvl-btn-secondary:disabled { opacity: 0.4; cursor: not-allowed; }
.nvl-btn-primary.small, .nvl-btn-secondary.small { padding: 9px 18px; font-size: 13px; }
.nvl-btn-primary.block { display: block; width: 100%; margin-top: 8px; text-align: center; }

.step-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; gap: 10px; }

/* ---- Step 3 結果 -------------------------------------------------------- */
.result-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.result-head .step-title { margin: 0; }

.summary { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.chip {
  background: var(--nvl-tint-blue); color: var(--nvl-navy);
  border: 1px solid var(--nvl-blue); border-radius: var(--nvl-radius-pill);
  padding: 4px 14px; font-size: 0.8rem; font-weight: 500; letter-spacing: 0.05em;
}

.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.actions .nvl-btn-primary, .actions .nvl-btn-secondary { flex: 1 1 auto; min-width: 220px; text-align: center; }

/* ---- 文書プレビュー ----------------------------------------------------- */
.doc-layout { display: grid; grid-template-columns: 210px 1fr; gap: 24px; align-items: start; }
.doc-nav-acc { position: sticky; top: 16px; }
.doc-nav-acc > summary { display: none; }
.doc-nav { display: flex; flex-direction: column; gap: 2px; border-left: 1px solid var(--nvl-border); }
.doc-nav-link {
  color: var(--nvl-text); text-decoration: none; font-size: 13px; letter-spacing: 0.05em;
  padding: 6px 12px; line-height: 1.5; border-left: 2px solid transparent; margin-left: -1px;
}
.doc-nav-link:hover { color: var(--nvl-blue); border-left-color: var(--nvl-blue); background: var(--nvl-tint-blue); }

.doc-preview {
  background: #fff; border: 1px solid var(--nvl-border); border-radius: var(--nvl-radius);
  padding: 40px 44px; font-feature-settings: "palt"; overflow-wrap: break-word;
}
.doc-title { text-align: center; font-size: 1.5rem; font-weight: 700; margin: 0 0 8px; color: var(--nvl-ink); letter-spacing: 0.1em; }
.doc-sub { text-align: center; color: var(--nvl-text); font-size: 0.9rem; margin: 0 0 22px; }
.doc-note {
  background: var(--nvl-tint-blue); border: 1px solid var(--nvl-border);
  border-radius: var(--nvl-radius); padding: 12px 16px;
  font-size: 0.82rem; color: var(--nvl-text); margin: 0 0 28px;
}
.doc-ch {
  font-size: 1.1rem; font-weight: 700; color: var(--nvl-ink); letter-spacing: 0.05em;
  border-bottom: 1px solid var(--nvl-border); padding-bottom: 6px;
  margin: 34px 0 16px; scroll-margin-top: 16px;
}
.doc-clause { margin: 0 0 12px; }
.doc-clause strong { color: var(--nvl-navy); }
.doc-para { margin: 0 0 12px; }
.doc-items { margin: 0 0 14px; padding-left: 1.6em; }
.doc-items li { margin-bottom: 5px; }

.doc-table-wrap { overflow-x: auto; margin: 0 0 16px; }
.doc-table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
.doc-table th, .doc-table td { border: 1px solid var(--nvl-border); padding: 8px 12px; text-align: left; vertical-align: top; }
.doc-table th { background: var(--nvl-navy); color: #fff; font-weight: 500; letter-spacing: 0.05em; white-space: nowrap; }
.doc-table tbody tr:nth-child(even) { background: var(--nvl-tint-blue); }

/* ---- 解説コンテンツ ----------------------------------------------------- */
.prose { max-width: 760px; margin: 0 auto 56px; }
.prose h2 {
  font-size: 24px; font-weight: 700; letter-spacing: 0.05em; color: var(--nvl-ink);
  margin: 40px 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--nvl-border);
}
.prose p { margin: 0 0 16px; color: var(--nvl-text); line-height: 2.0; }
.prose ul, .prose ol { margin: 0 0 18px; padding-left: 1.5em; color: var(--nvl-text); line-height: 1.9; }
.prose li { margin-bottom: 10px; }
.prose b { color: var(--nvl-ink); }

.faq details {
  border: 1px solid var(--nvl-border); border-radius: var(--nvl-radius);
  padding: 2px 18px; margin-bottom: 10px; background: #fff;
}
.faq summary { cursor: pointer; font-weight: 700; letter-spacing: 0.05em; color: var(--nvl-ink); padding: 14px 0; }
.faq summary:hover { color: var(--nvl-blue); }
.faq details[open] summary { border-bottom: 1px solid var(--nvl-border); margin-bottom: 10px; }
.faq p { margin: 0 0 14px; }

/* ---- ダウンロードステータス（生成中・失敗表示。エラー系の赤のみ例外的に可） */
.dl-status { min-height: 20px; font-size: 0.84rem; margin: -8px 0 14px; color: var(--nvl-text); }
.dl-status.is-err { color: #b3261e; }

/* ---- フッター（ダークセクション #121212・文字白単色） ------------------- */
.site-foot { background: var(--nvl-bg-dark); color: #fff; margin-top: 72px; }
.foot-inner { padding: 48px 20px 44px; }
.foot-cross { margin-bottom: 22px; }
.foot-cross-t {
  display: block; font-family: var(--nvl-font-en); font-weight: 400;
  font-size: 13px; letter-spacing: 0.1em; color: #fff; opacity: 0.7; margin-bottom: 6px;
}
.foot-cross a { color: #fff; text-decoration: none; font-weight: 500; letter-spacing: 0.05em; }
.foot-cross a:hover { text-decoration: underline; }
.foot-meta {
  display: flex; gap: 20px; flex-wrap: wrap; font-size: 14px; letter-spacing: 0.05em;
  padding-top: 18px; border-top: 1px solid var(--nvl-line-on-dark);
}
.foot-meta a { color: #fff; }
.foot-note { font-size: 12px; color: #fff; opacity: 0.7; margin: 16px 0 0; line-height: 1.8; }

/* ---- レスポンシブ ------------------------------------------------------- */
@media (max-width: 720px) {
  .hero .wrap.hero-split { grid-template-columns: 1fr; }
  .hero-copy { padding: 36px 0 30px; }
  .hero h1 { font-size: 1.5rem; }
  .hero-visual { min-height: 140px; }
  .hero-doc { display: none; }
  .sec-head { margin: 48px 0 20px; }
  .stepper .st { font-size: 0; gap: 0; padding: 10px 4px; }
  .stepper .st-n { font-size: 0.85rem; }
  .stepper .st.is-active { font-size: 12px; gap: 6px; letter-spacing: 0.05em; }
  .card { padding: 22px 18px; }
  .doc-layout { grid-template-columns: 1fr; }
  .doc-nav-acc { position: static; border: 1px solid var(--nvl-border); border-radius: var(--nvl-radius); background: #fff; }
  .doc-nav-acc > summary { display: block; cursor: pointer; padding: 12px 14px; font-weight: 700; letter-spacing: 0.05em; color: var(--nvl-ink); }
  .doc-nav { border-left: none; padding: 4px 10px 12px; }
  .doc-preview { padding: 24px 18px; }
  .actions { flex-direction: column; }
  .actions .nvl-btn-primary, .actions .nvl-btn-secondary { min-width: 0; width: 100%; }
}