/*
  LINE×スプレッドシート 名刺管理アプリ LP（守成クラブ ブース用）のスタイル
  テーマ：和モダン（NYの美術館の日本展のイメージ）・クリーン
  色は 白・黒・グレー がベース。赤＝申し込みボタンと特別価格だけ。ティール＝ラベル・矢印・チェックなど小さなアクセント
  ベージュ・生成りなど暖色寄りの色は使わない（本人指定・2026-10-03）
  色はすべて白／グレー背景で WCAG AA（4.5:1 以上）を確認済み
*/

/* ---------- 変数 ---------- */
:root {
  --color-ink: #1a1a1a;        /* 本文・黒 */
  --color-paper: #ffffff;      /* 背景・白 */
  --color-gray: #f3f4f5;       /* 交互の背景・ライトグレー */
  --color-sub: #555b61;        /* 補足テキスト・グレー */
  --color-line: #d5d8dc;       /* 罫線 */
  --color-red: #b7282e;        /* 申し込みボタン・特別価格のみ */
  --color-red-dark: #962025;
  --color-teal: #1f6f6a;       /* 小さなアクセント */

  --font-serif: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;

  --header-h: 64px;
  --space-section: clamp(4.5rem, 10vw, 8rem);
  --container: 1080px;
  --narrow: 720px;
}

/* ---------- ベース ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.9;
  letter-spacing: 0.04em;
  padding-bottom: calc(5.5rem + env(safe-area-inset-bottom)); /* スマホの固定ボタン分 */
}

h1, h2, h3 { margin: 0; font-weight: 700; line-height: 1.5; }
/* 見出しは単語の途中で改行しない（改行位置は HTML の <wbr> で指定） */
h1, h2, h3 { word-break: keep-all; overflow-wrap: anywhere; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; }

/* ページ内リンクで見出しが固定ヘッダーに隠れないように */
section[id] { scroll-margin-top: calc(var(--header-h) + 16px); }

:focus-visible {
  outline: 3px solid var(--color-teal);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  background: var(--color-ink);
  color: var(--color-paper);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { top: 1rem; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.narrow { max-width: var(--narrow); }

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0.75rem 2rem;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-align: center;
  border: 1px solid var(--color-ink);
  border-radius: 999px; /* ピル型：d-dizain.com のボタンの形にそろえる */
  background: var(--color-paper);
  color: var(--color-ink);
  transition: background-color 0.2s, color 0.2s;
}
.btn--primary {
  background: var(--color-red);
  border-color: var(--color-red);
  color: #fff;
}
.btn--primary:hover { background: var(--color-red-dark); border-color: var(--color-red-dark); }
.btn--small { min-height: 44px; padding: 0.4rem 1rem; font-size: 0.875rem; }
.btn--small:hover { background: var(--color-ink); color: var(--color-paper); }
.btn--block { display: flex; width: 100%; }

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
}

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--color-line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
}
.site-header__brand {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.25rem;
  letter-spacing: 0.12em;
}

/* ---------- 共通パーツ ---------- */
.tag {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-teal);
  border: 1px solid var(--color-teal);
  padding: 0.15rem 0.75rem;
  letter-spacing: 0.1em;
}

.section { padding: var(--space-section) 0; }
.section--tint { background: var(--color-gray); }
.section--dark { background: var(--color-ink); color: var(--color-paper); }

/* セクション番号：黒の数字＋細い罫線（美術館の展示番号のイメージ） */
.section__num {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-ink);
  letter-spacing: 0.2em;
  margin-bottom: 1.25rem;
}
.section__num::after {
  content: "";
  width: 3rem;
  height: 1px;
  background: var(--color-teal);
}
.section__num--light { color: #fff; }
.section__num--light::after { background: #fff; }

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4.2vw, 2.25rem);
  letter-spacing: 0.08em;
  margin-bottom: 2.5rem;
}

/* ---------- 1. ヒーロー ---------- */
.hero { padding: clamp(3.5rem, 9vw, 7rem) 0 var(--space-section); }
.hero__inner {
  display: grid;
  gap: 3.5rem;
  align-items: center;
}
.hero__text { display: grid; gap: 1.75rem; justify-items: start; }
.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(1.875rem, 6vw, 3.25rem);
  letter-spacing: 0.06em;
  line-height: 1.45;
}
.hero__lead { color: var(--color-sub); }

@media (min-width: 900px) {
  .hero__inner { grid-template-columns: 1.1fr 1fr; }
}

/* 名刺 → LINE → シート の図 */
.flow-visual {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 2rem 1rem;
  border: 1px solid var(--color-line);
  background: var(--color-gray);
}
.flow-visual__item {
  display: grid;
  justify-items: center;
  gap: 0.75rem;
  flex: 1;
}
.flow-visual__label { font-size: 0.875rem; color: var(--color-sub); text-align: center; line-height: 1.5; }
.flow-visual__arrow {
  width: 1.25rem;
  height: 1px;
  background: var(--color-teal);
  position: relative;
  flex-shrink: 0;
}
.flow-visual__arrow::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  border-left: 6px solid var(--color-teal);
  border-top: 3.5px solid transparent;
  border-bottom: 3.5px solid transparent;
}

.mock-card, .mock-chat, .mock-sheet {
  width: 100%;
  max-width: 110px;
  aspect-ratio: 1.65;
  background: #fff;
  border: 1px solid var(--color-ink);
}
.mock-card { display: grid; align-content: center; gap: 6px; padding: 0 12%; position: relative; }
.mock-card::before {
  content: "";
  position: absolute;
  top: 10%;
  right: 10%;
  width: 10px;
  height: 10px;
  background: var(--color-ink);
}
.mock-card__line { height: 3px; background: var(--color-line); }
.mock-card__line--name { height: 5px; width: 60%; background: var(--color-ink); }
.mock-card__line--short { width: 45%; }

.mock-chat {
  aspect-ratio: 0.9;
  max-width: 80px;
  border-radius: 10px;
  display: grid;
  align-content: center;
  gap: 6px;
  padding: 8px;
}
.mock-chat__bubble {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.6875rem;
  line-height: 1.4;
  background: var(--color-gray);
  border-radius: 6px;
  padding: 3px 6px;
  justify-self: start;
}
.mock-chat__bubble--me {
  justify-self: end;
  width: 70%;
  height: 22px;
  background: var(--color-teal);
}
/* 絵文字の代わりのチェック記号 */
.mock-check {
  width: 8px;
  height: 5px;
  border-left: 2px solid var(--color-teal);
  border-bottom: 2px solid var(--color-teal);
  transform: rotate(-45deg) translateY(-1px);
}

.mock-sheet {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-line);
  padding: 1px;
}
.mock-sheet span { background: #fff; }
.mock-sheet span:nth-child(-n+3) { background: var(--color-gray); }

/* ---------- 2. お悩み ---------- */
.pain-list {
  display: grid;
  gap: 1rem;
}
.pain-list li {
  background: var(--color-paper);
  border-left: 3px solid var(--color-ink);
  padding: 1.25rem 1.5rem;
  font-weight: 700;
}
@media (min-width: 900px) {
  .pain-list { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- 4. 特徴 ---------- */
.features {
  display: grid;
  gap: 1.5rem;
}
.feature {
  background: var(--color-paper);
  padding: 2rem 1.75rem;
  border-top: 2px solid var(--color-ink);
}
.feature__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}
@media (min-width: 900px) {
  .features { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- 5. こんな方に ---------- */
.check-list { display: grid; gap: 1rem; }
.check-list li {
  position: relative;
  padding: 0 0 1rem 2rem;
  border-bottom: 1px solid var(--color-line);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0.25rem;
  top: 0.55em;
  width: 0.7rem;
  height: 0.4rem;
  border-left: 2px solid var(--color-teal);
  border-bottom: 2px solid var(--color-teal);
  transform: rotate(-45deg);
}

/* ---------- 6. 料金 ---------- */
.price-card {
  background: var(--color-paper);
  color: var(--color-ink);
  padding: clamp(2rem, 5vw, 3rem);
  display: grid;
  gap: 1.25rem;
}
.price-card__plan {
  font-weight: 700;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-line);
}
.price-card__regular { color: var(--color-sub); }
.price-card__regular small { font-size: 0.875rem; }
.price-card__special { display: grid; gap: 0.25rem; }
.price-card__label { font-size: 0.9375rem; color: var(--color-red); font-weight: 700; letter-spacing: 0.1em; }
.price-card__amount {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 8vw, 3rem);
  line-height: 1.2;
}
.price-card__amount small { font-family: var(--font-sans); font-size: 1rem; margin-left: 0.25rem; }
.price-card__includes { display: grid; gap: 0.5rem; }
.price-card__includes li::before { content: "― "; color: var(--color-teal); }
.price-card__note { font-size: 0.875rem; color: var(--color-sub); text-align: center; }

.support-note {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  text-align: center;
}

/* ---------- 7. 流れ ---------- */
.prepare {
  border: 1px solid var(--color-line);
  padding: 1.5rem 1.75rem;
  margin-bottom: 3rem;
}
.prepare__title {
  font-size: 1rem;
  color: var(--color-teal);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}
.prepare__list { display: grid; gap: 0.25rem 2rem; }
.prepare__list li::before { content: "・"; }
@media (min-width: 600px) {
  .prepare__list { grid-template-columns: repeat(2, 1fr); }
}

.steps {
  display: grid;
  gap: 2rem;
  counter-reset: step;
}
.step {
  counter-increment: step;
  position: relative;
  padding-top: 3rem;
  border-top: 1px solid var(--color-ink);
}
.step::before {
  content: "Step " counter(step);
  position: absolute;
  top: 0.75rem;
  left: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--color-teal);
}
.step__title { font-family: var(--font-serif); font-size: 1.125rem; margin-bottom: 0.5rem; }
@media (min-width: 900px) {
  .steps { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- 8. FAQ ---------- */
.faq { border-top: 1px solid var(--color-ink); }
.faq details { border-bottom: 1px solid var(--color-line); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 1.25rem 2.5rem 1.25rem 2rem;
  font-weight: 700;
  position: relative;
  min-height: 44px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "Q";
  position: absolute;
  left: 0;
  font-family: var(--font-serif);
  color: var(--color-teal);
}
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0.5rem;
  color: var(--color-teal);
  font-size: 1.25rem;
  line-height: 1.5;
}
.faq details[open] summary::after { content: "−"; }
.faq details p {
  padding: 0 0.5rem 1.5rem 2rem;
}

/* ---------- 9. 最終CTA ---------- */
.final-cta { text-align: center; }
.final-cta__title {
  font-family: var(--font-serif);
  font-size: clamp(1.625rem, 5vw, 2.5rem);
  letter-spacing: 0.08em;
  margin-bottom: 2.5rem;
}

/* ---------- フッター ---------- */
.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 2.5rem 0;
  font-size: 0.875rem;
}
.site-footer__inner { display: grid; gap: 1rem; justify-items: center; text-align: center; }
.site-footer__brand { font-family: var(--font-serif); font-weight: 500; letter-spacing: 0.1em; }
.site-footer__links { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem 1.5rem; }
.site-footer__links a { display: inline-block; padding: 0.5rem 0; }
.site-footer__copy { color: var(--color-sub); }

/* ---------- スマホ用 固定ボタン ---------- */
.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 60;
  padding: 0.75rem 1rem calc(0.75rem + env(safe-area-inset-bottom));
  background: rgba(255, 255, 255, 0.96);
  border-top: 1px solid var(--color-line);
  transition: transform 0.25s;
}
.sticky-cta.is-hidden { transform: translateY(110%); }
@media (prefers-reduced-motion: reduce) {
  .sticky-cta { transition: none; }
}
@media (min-width: 900px) {
  .sticky-cta { display: none; }
  body { padding-bottom: 0; }
}