/* =============================================================
   note収益化講座 会員サイト スタイル
   ============================================================= */

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

:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f7f7f5;
  --color-bg-side: #fafaf8;
  --color-text: #2a2a2a;
  --color-text-mute: #6b6b6b;
  --color-border: #e6e6e6;
  --color-accent: #41c9b4;
  --color-accent-dark: #2fa896;
  --color-link: #2563eb;
  --color-error: #c0392b;
  --color-warn: #f39c12;

  --level-base:     #6b7280;
  --level-beginner: #1f8a78;
  --level-mid:      #b87b00;
  --level-adv:      #c0394e;

  --font-base: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
               "Hiragino Sans", "Yu Gothic", "Meiryo", "Segoe UI", sans-serif;

  --sidebar-w: 280px;
  --header-h: 56px;
  --radius: 6px;
}

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

body {
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-text);
  background-color: var(--color-bg);
  font-feature-settings: "palt";
}

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

/* =============================================================
   ヘッダー
   ============================================================= */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}
.header-inner {
  height: 100%;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.header-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.header-title:hover { text-decoration: none; opacity: 0.8; }
.logo-mark { font-size: 22px; }

.header-user { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.user-name { color: var(--color-text-mute); }
.btn-logout {
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text);
  font-size: 13px;
}
.btn-logout:hover { background: var(--color-bg-soft); text-decoration: none; }

/* ハンバーガー（モバイル用） */
#hamburger-menu { display: none; }
#hamburger-icon {
  display: none;
  width: 32px;
  height: 32px;
  position: relative;
  cursor: pointer;
}
#hamburger-icon span,
#hamburger-icon span::before,
#hamburger-icon span::after {
  display: block;
  position: absolute;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  left: 5px;
}
#hamburger-icon span { top: 15px; }
#hamburger-icon span::before { content: ""; top: -7px; }
#hamburger-icon span::after  { content: ""; top: 7px; }

/* =============================================================
   レイアウト
   ============================================================= */
#layout {
  display: flex;
  padding-top: var(--header-h);
  min-height: calc(100vh - var(--header-h));
}

/* =============================================================
   サイドバー
   ============================================================= */
#sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--color-bg-side);
  border-right: 1px solid var(--color-border);
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
}
.sidebar-inner { padding: 24px 16px 32px; }

.sidebar-section { margin-bottom: 28px; }
.sidebar-section h3 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-text-mute);
  text-transform: uppercase;
  margin-bottom: 8px;
  padding-left: 8px;
}

.sidebar-menu { list-style: none; }
.sidebar-menu li a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: 4px;
}
.sidebar-menu li a:hover { background: #fff; text-decoration: none; }
.sidebar-menu li.is-active a {
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
}

.sidebar-chapters { list-style: none; counter-reset: ch; }
.sidebar-chapters li {
  border-bottom: 1px dashed var(--color-border);
}
.sidebar-chapters li:last-child { border-bottom: none; }
.sidebar-chapters li a {
  display: flex;
  flex-direction: column;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--color-text);
  line-height: 1.5;
  border-left: 3px solid transparent;
}
.sidebar-chapters li a:hover {
  background: #fff;
  text-decoration: none;
}
.sidebar-chapters .ch-num {
  font-size: 11px;
  color: var(--color-text-mute);
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}
.sidebar-chapters .ch-title {
  font-weight: 600;
  color: var(--color-text);
}

/* レベル別カラー（左端ライン） */
.sidebar-chapters li.level-base a     { border-left-color: var(--level-base); }
.sidebar-chapters li.level-beginner a { border-left-color: var(--level-beginner); }
.sidebar-chapters li.level-mid a      { border-left-color: var(--level-mid); }
.sidebar-chapters li.level-adv a      { border-left-color: var(--level-adv); }

.sidebar-chapters li.is-active a {
  background: #fff;
  border-left-width: 5px;
}
.sidebar-chapters li.is-active .ch-title { color: var(--color-accent-dark); }

/* =============================================================
   メインコンテンツ
   ============================================================= */
#content {
  flex: 1;
  min-width: 0;
  padding: 32px 40px 64px;
}
.content-inner {
  max-width: 800px;
  margin: 0 auto;
}

.flash {
  padding: 12px 16px;
  margin-bottom: 16px;
  border-radius: var(--radius);
  font-size: 14px;
}
.flash-error { background: #fde8ec; color: var(--color-error); border: 1px solid #f5c6cb; }
.flash-success { background: #e7f7f3; color: var(--color-accent-dark); border: 1px solid #c3e6da; }

/* =============================================================
   ページ共通
   ============================================================= */
.page-header {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}
.eyebrow {
  display: inline-block;
  font-size: 12px;
  color: var(--color-accent-dark);
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  padding: 3px 10px;
  background: #e7f7f3;
  border-radius: 999px;
}
.page-header h1 {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.5;
  margin-bottom: 16px;
}
.page-header .lead {
  font-size: 15px;
  color: var(--color-text-mute);
  line-height: 1.9;
}

.chapter-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-text-mute);
}

/* =============================================================
   バッジ（レベル）
   ============================================================= */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}
.badge-base     { background: #f0f0ed; color: var(--level-base); }
.badge-beginner { background: #e7f7f3; color: var(--level-beginner); }
.badge-mid      { background: #fff5e0; color: var(--level-mid); }
.badge-adv      { background: #fde8ec; color: var(--level-adv); }

/* =============================================================
   章本文
   ============================================================= */
.chapter-body { font-size: 16px; }
.chapter-body img { max-width: 100%; height: auto; }
.chapter-body h2 {
  font-size: 22px;
  font-weight: 800;
  margin: 48px 0 16px;
  padding: 8px 14px;
  background: linear-gradient(180deg, transparent 65%, #ffe9a8 65%);
  display: inline-block;
}
.chapter-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 32px 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--color-accent);
}
.chapter-body p { margin: 14px 0; }
.chapter-body ul,
.chapter-body ol { margin: 14px 0 14px 24px; }
.chapter-body li { margin-bottom: 6px; }
.chapter-body strong { color: #d23a3a; }
.chapter-body blockquote {
  margin: 20px 0;
  padding: 14px 18px;
  background: var(--color-bg-soft);
  border-left: 4px solid var(--color-text-mute);
  color: var(--color-text-mute);
}

/* 注意ボックス */
.callout {
  margin: 24px 0;
  padding: 16px 20px;
  border-radius: var(--radius);
  border: 1px solid;
}
.callout-tip   { background: #e7f7f3; border-color: #c3e6da; color: #1f6655; }
.callout-warn  { background: #fff5e0; border-color: #f0c87a; color: #8a5a00; }
.callout-info  { background: #eef4fc; border-color: #c7d8ee; color: #1d4276; }
.callout-title { font-weight: 700; margin-bottom: 6px; }

/* =============================================================
   図解プレースホルダー
   ============================================================= */
figure.figure {
  margin: 28px 0;
  padding: 0;
  background: #fafafa;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
figure.figure img {
  width: 100%;
  height: auto;
  display: block;
}
figure.figure .placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  padding: 32px 20px;
  text-align: center;
  background: repeating-linear-gradient(
    45deg,
    #f5f5f3,
    #f5f5f3 12px,
    #ececea 12px,
    #ececea 24px
  );
  color: var(--color-text-mute);
}
figure.figure .placeholder-icon { font-size: 36px; margin-bottom: 8px; }
figure.figure .placeholder-text { font-weight: 700; margin-bottom: 4px; }
figure.figure .placeholder-file { font-size: 12px; font-family: monospace; opacity: 0.8; }
figure.figure figcaption {
  padding: 10px 16px;
  background: #fff;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-mute);
  text-align: center;
}

/* =============================================================
   章の前後ナビゲーション
   ============================================================= */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}
.chapter-nav a {
  flex: 1;
  padding: 14px 18px;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 13px;
}
.chapter-nav a:hover { background: #fff; text-decoration: none; }
.chapter-nav .nav-label { display: block; font-size: 11px; color: var(--color-text-mute); margin-bottom: 4px; }
.chapter-nav .nav-title { display: block; font-weight: 700; }
.chapter-nav .next { text-align: right; }

/* =============================================================
   トップページ カードグリッド
   ============================================================= */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 48px;
}
.chapter-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 18px;
  color: var(--color-text);
  transition: all 0.15s ease;
  display: block;
}
.chapter-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
  text-decoration: none;
}
.chapter-card .card-num {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-text-mute);
  margin-bottom: 4px;
}
.chapter-card .card-title {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 8px;
  line-height: 1.5;
}
.chapter-card .card-level {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--color-bg-soft);
  color: var(--color-text-mute);
}
.chapter-card.level-base     { border-left-color: var(--level-base); }
.chapter-card.level-beginner { border-left-color: var(--level-beginner); }
.chapter-card.level-mid      { border-left-color: var(--level-mid); }
.chapter-card.level-adv      { border-left-color: var(--level-adv); }

.start-guide {
  background: linear-gradient(180deg, #fafafa, #f0f0ed);
  padding: 32px;
  border-radius: var(--radius);
  text-align: center;
}
.start-guide h2 { font-size: 20px; margin-bottom: 12px; }
.start-guide p { color: var(--color-text-mute); margin-bottom: 24px; }

.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 999px;
  font-weight: 600;
}
.btn-primary:hover { background: var(--color-accent-dark); text-decoration: none; }

/* =============================================================
   フッター
   ============================================================= */
#site-footer {
  border-top: 1px solid var(--color-border);
  padding: 20px;
  font-size: 12px;
  color: var(--color-text-mute);
  text-align: center;
  background: var(--color-bg-soft);
}

/* =============================================================
   ログインページ
   ============================================================= */
body.login-page {
  background: linear-gradient(135deg, #f7f9fb 0%, #e7f7f3 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-wrap { width: 100%; padding: 20px; }
.login-card {
  max-width: 420px;
  margin: 0 auto;
  background: #fff;
  border-radius: 12px;
  padding: 40px 32px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}
.login-header { text-align: center; margin-bottom: 28px; }
.login-logo { font-size: 40px; }
.login-header h1 { font-size: 18px; margin: 8px 0 4px; }
.login-sub { font-size: 13px; color: var(--color-text-mute); }

.login-form .form-group { margin-bottom: 16px; }
.login-form label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}
.login-form input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: inherit;
}
.login-form input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(65, 201, 180, 0.15);
}
.btn-login {
  width: 100%;
  padding: 14px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  margin-top: 8px;
}
.btn-login:hover { background: var(--color-accent-dark); }
.login-note {
  margin-top: 24px;
  font-size: 12px;
  color: var(--color-text-mute);
  text-align: center;
  line-height: 1.7;
}

/* パスワード再発行リンク（ログイン画面） */
.btn-reset {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 10px 14px;
  background: transparent;
  color: var(--color-text-mute);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  transition: all 0.15s ease;
}
.btn-reset:hover {
  background: var(--color-bg-soft);
  color: var(--color-accent);
  border-color: var(--color-accent);
  border-style: solid;
  text-decoration: none;
}

/* Google ログインボタン */
.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 16px;
  background: #fff;
  color: #3c4043;
  border: 1px solid #dadce0;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  transition: all 0.15s ease;
}
.btn-google:hover {
  background: #f8f9fa;
  border-color: #d2d4d6;
  box-shadow: 0 1px 3px rgba(60, 64, 67, 0.1);
  text-decoration: none;
}
.btn-google svg { flex-shrink: 0; }

.login-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 16px 0 20px;
  color: var(--color-text-mute);
  font-size: 12px;
}
.login-divider::before,
.login-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-border);
}
.login-divider span { padding: 0 12px; }

/* 新規購入セクション */
.login-signup {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  text-align: center;
}
.login-signup-text {
  font-size: 13px;
  color: var(--color-text-mute);
  margin-bottom: 12px;
}
.btn-signup {
  display: inline-block;
  width: 100%;
  padding: 12px 20px;
  background: var(--color-bg-soft);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.15s ease;
}
.btn-signup:hover {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  text-decoration: none;
  transform: translateY(-1px);
}

/* =============================================================
   購入ページ
   ============================================================= */
body.buy-page {
  background: linear-gradient(135deg, #fafaf8 0%, #e7f7f3 100%);
  min-height: 100vh;
  padding: 32px 16px;
}
.buy-wrap { max-width: 720px; margin: 0 auto; }
.buy-card {
  background: #fff;
  border-radius: 12px;
  padding: 48px 40px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
}
.buy-header { text-align: center; margin-bottom: 32px; }
.buy-logo { font-size: 48px; }
.buy-eyebrow {
  display: inline-block;
  font-size: 12px;
  color: var(--color-accent-dark);
  font-weight: 600;
  letter-spacing: 0.1em;
  margin: 12px 0;
  padding: 4px 12px;
  background: #e7f7f3;
  border-radius: 999px;
}
.buy-header h1 {
  font-size: 26px;
  font-weight: 800;
  line-height: 1.5;
  margin-bottom: 12px;
}
.buy-lead {
  font-size: 15px;
  color: var(--color-text-mute);
  line-height: 1.9;
}

.buy-features { margin: 32px 0; }
.buy-features h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding: 8px 14px;
  background: linear-gradient(180deg, transparent 65%, #ffe9a8 65%);
  display: inline-block;
}
.features-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.features-list li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: 15px;
}
.features-list li:last-child { border-bottom: none; }

.buy-price {
  background: linear-gradient(180deg, #fafafa, #f0f0ed);
  padding: 28px;
  text-align: center;
  border-radius: var(--radius);
  margin: 32px 0;
}
.buy-price-label {
  font-size: 13px;
  color: var(--color-text-mute);
  letter-spacing: 0.1em;
}
.buy-price-amount {
  font-size: 42px;
  font-weight: 800;
  margin: 8px 0;
  color: var(--color-text);
}
.buy-price-amount span { font-size: 16px; font-weight: 600; color: var(--color-text-mute); }
.buy-price-note { font-size: 13px; color: var(--color-text-mute); }

.buy-cta { text-align: center; margin: 32px 0; }
.btn-buy {
  display: inline-block;
  padding: 18px 48px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}
.btn-buy:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(65, 201, 180, 0.3);
}
.buy-secure {
  margin-top: 12px;
  font-size: 12px;
  color: var(--color-text-mute);
}

.buy-flow, .buy-faq { margin: 40px 0; }
.buy-flow h2, .buy-faq h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding: 8px 14px;
  background: linear-gradient(180deg, transparent 65%, #ffe9a8 65%);
  display: inline-block;
}
.flow-list {
  list-style: decimal;
  padding-left: 24px;
}
.flow-list li {
  padding: 6px 0;
  font-size: 14px;
}

.buy-faq details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
  background: #fafafa;
}
.buy-faq details[open] { background: #fff; }
.buy-faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
}
.buy-faq details p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--color-text-mute);
  line-height: 1.8;
}

.buy-footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-text-mute);
  text-align: center;
}

.success-message {
  text-align: center;
  padding: 20px;
  font-size: 14px;
  line-height: 1.9;
}

/* =============================================================
   レスポンシブ
   ============================================================= */
@media (max-width: 900px) {
  :root { --sidebar-w: 240px; }
  #content { padding: 24px 24px 48px; }
}

@media (max-width: 720px) {
  #hamburger-icon { display: block; }
  .header-user .user-name { display: none; }

  #sidebar {
    position: fixed;
    top: var(--header-h);
    left: -100%;
    height: calc(100vh - var(--header-h));
    width: 280px;
    z-index: 90;
    transition: left 0.25s ease;
    box-shadow: 4px 0 20px rgba(0,0,0,0.1);
  }
  #hamburger-menu:checked ~ #layout #sidebar,
  body:has(#hamburger-menu:checked) #sidebar { left: 0; }

  #content { padding: 20px 16px 40px; }
  .page-header h1 { font-size: 22px; }
  .chapter-body h2 { font-size: 19px; }
  .chapter-body h3 { font-size: 16px; }

  .chapter-nav { flex-direction: column; }
}

/* =============================================================
   管理者用 編集ボタン (右上フローティング)
   ============================================================= */
.btn-admin-edit {
  position: sticky;
  top: 80px;
  float: right;
  margin: 0 0 -40px 16px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: linear-gradient(135deg, #41c9b4 0%, #36b09c 100%);
  color: #fff;
  border: none;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(65, 201, 180, 0.35);
  transition: all 0.15s ease;
}
.btn-admin-edit:hover {
  background: linear-gradient(135deg, #36b09c 0%, #2d9a87 100%);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(65, 201, 180, 0.5);
}