/* =========================================================================
   MyTutor — 帰国子女 英語力養成コース (Returnee English Development)
   Built to the "Clear Professional" design guidelines (same system as the
   Nursing / Everyday Conversation / Business / Primary pages). Scoped under .rd.
   Revised-guideline compliance: shared classes (.mt-card, .tag, .course-eyebrow,
   .free-trial-cta, .mt-course-layout-*) are mirrored here so the page is
   self-contained. If css/main.css defines them globally, these mirrors can be
   deleted. Eyebrows are plain (no ::before line); non-link cards never hover.
   ========================================================================= */

@media (min-width: 769px) {
  .mt-course-layout-page #wrap { min-width: 0; }
  .mt-course-layout-page #container { width: 100%; max-width: none; padding: 0; }
}
.mt-course-layout-page .rd { margin-bottom: 0; }

.rd {
  --ink: #172033;
  --muted: #657084;
  --line: #DFE5EE;
  --paper: #FFFFFF;
  --canvas: #F4F6FA;
  --navy-950: #031B68;
  --navy-800: #1E2D6E;
  --navy-700: #263A8A;
  --purple-700: #6C4DA4;
  --purple-100: #F1EDFB;
  --teal-600: #158A9A;
  --teal-050: #E8F5F7;
  --gold-500: #C99A2E;
  --radius-sm: 6px;
  --radius-md: 8px;
  --shadow-soft: 0 14px 40px rgba(20, 32, 62, 0.12);
  --shadow-tight: 0 8px 24px rgba(20, 32, 62, 0.10);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;

  color-scheme: light;
  box-sizing: border-box;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
.rd *, .rd *::before, .rd *::after { box-sizing: inherit; }
.rd p, .rd h1, .rd h2, .rd h3, .rd h4, .rd ul, .rd ol, .rd figure { margin: 0; padding: 0; }
.rd ul, .rd ol { list-style: none; }
.rd img { max-width: 100%; display: block; }
.rd a { color: inherit; }

/* ---------- shared utilities ---------- */
.rd .mt-card {
  display: block; overflow: hidden;
  border: 1px solid rgba(3, 27, 104, 0.12);
  border-radius: var(--radius-md);
  background: var(--paper);
  box-shadow: var(--shadow-tight);
  color: inherit; text-decoration: none;
}
.rd .tag {
  display: inline-flex; align-items: center;
  padding: 4px 7px; border: 0; border-radius: 999px;
  background: var(--purple-100); color: var(--navy-800);
  font-size: 10.5px; font-weight: 700; line-height: 1.25; white-space: nowrap;
}
.rd .tag--teal { background: var(--teal-050); color: var(--teal-600); }

/* ---------- layout primitives ---------- */
.rd .mt-course-layout-wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }
.rd-section { padding: 56px 0; }
.rd-section--canvas { background: var(--canvas); }
.rd-section--teal { background: var(--teal-050); }
.rd .course-eyebrow {
  font-size: 12px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--purple-700); display: block; line-height: 1.4; margin-bottom: 12px;
}
.rd-h2 { font-size: 24px; line-height: 1.32; font-weight: 700; color: var(--navy-950); margin-bottom: 14px; }
.rd-lead { color: var(--muted); font-size: 16px; max-width: 64ch; }
.rd-body { color: var(--ink); font-size: 15.5px; }
.rd-body + .rd-body { margin-top: 14px; }
.rd-body--muted { color: var(--muted); }

/* ---------- buttons ---------- */
.rd-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 700; padding: 13px 24px; border-radius: var(--radius-md);
  text-decoration: none; cursor: pointer; transition: background .16s ease, border-color .16s ease;
}
.rd-btn--primary,
.rd-btn--primary:link,
.rd-btn--primary:visited { background: var(--navy-800); color: #fff; border: 1px solid var(--navy-800); }
.rd-btn--primary:hover { background: var(--navy-950); border-color: var(--navy-950); color: #fff; text-decoration: none; }
.rd-btn--ghost,
.rd-btn--ghost:link,
.rd-btn--ghost:visited { background: transparent; color: var(--navy-800); border: 1.5px solid var(--line); }
.rd-btn--ghost:hover { border-color: var(--navy-800); color: var(--navy-800); text-decoration: none; }
.rd-btn--sm { font-size: 13.5px; padding: 10px 16px; }
.rd-btn--block { width: 100%; }

/* ============================ HERO ============================ */
.rd-hero { background: var(--canvas); padding: 38px 0 46px; }
.rd-hero__title { font-size: 26px; line-height: 1.3; font-weight: 700; color: var(--navy-950); margin: 10px 0 14px; }
.rd-hero__lead { color: var(--ink); font-size: 15.5px; margin-bottom: 10px; max-width: 62ch; }
.rd-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 24px; }
.rd-chip { font-size: 13px; font-weight: 600; padding: 7px 13px; border-radius: 999px; background: var(--paper); border: 1px solid var(--line); color: var(--ink); }
.rd-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* ============================ positioning ============================ */
.rd-pos { margin-top: 22px; background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--navy-700); border-radius: var(--radius-md); padding: 22px; }
.rd-contrast { display: grid; gap: 12px; margin-top: 18px; }
@media (min-width: 640px) { .rd-contrast { grid-template-columns: 1fr 1fr; } }
.rd-contrast__item { border: 1px solid var(--line); border-radius: var(--radius-md); padding: 16px 18px; background: var(--canvas); }
.rd-contrast__item--this { background: var(--teal-050); border-color: rgba(21,138,154,.3); }
.rd-contrast__k { font-size: 11px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 7px; display: inline-flex; align-items: center; gap: 6px; }
.rd-contrast__item--this .rd-contrast__k { color: var(--teal-600); }
.rd-contrast__item--other .rd-contrast__k { color: var(--muted); }
.rd-contrast__t { font-size: 14.5px; font-weight: 700; color: var(--navy-950); margin-bottom: 4px; }
.rd-contrast__b { font-size: 13.5px; color: var(--muted); }

/* ============================ check list (recommended-for / activities) ============================ */
.rd-checks { display: grid; gap: 11px; margin-top: 22px; }
@media (min-width: 640px) { .rd-checks--2 { grid-template-columns: 1fr 1fr; } }
.rd-check {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--navy-700);
  border-radius: var(--radius-md); padding: 13px 16px; font-weight: 600; font-size: 14.5px;
}
.rd-check__i { color: var(--teal-600); font-weight: 800; flex: none; }

/* ============================ skills ============================ */
.rd-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.rd-pill { font-size: 13px; font-weight: 700; padding: 7px 14px; border-radius: 999px; background: var(--navy-800); color: #fff; }
.rd-acts { display: grid; gap: 9px; margin-top: 18px; }
@media (min-width: 640px) { .rd-acts { grid-template-columns: 1fr 1fr; } }
.rd-act { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; color: var(--ink); }
.rd-act::before { content: "▸"; color: var(--purple-700); font-weight: 800; flex: none; }

/* ============================ material example chips ============================ */
.rd-matchips { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 4px; }

/* ============================ learning proposal (highlight) ============================ */
.rd-proposal {
  margin-top: 4px; background: var(--paper);
  border: 1px solid rgba(21, 138, 154, 0.28); border-top: 3px solid var(--teal-600);
  border-radius: var(--radius-md); box-shadow: var(--shadow-soft); padding: 28px 26px;
}
.rd-proposal__b { font-size: 15px; color: var(--ink); margin-bottom: 16px; }
.rd-proposal__list { display: grid; gap: 10px; margin: 16px 0; }
.rd-proposal__list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; color: var(--navy-950); font-weight: 700; }
.rd-proposal__list li::before {
  content: ""; flex: none; width: 9px; height: 9px; margin-top: 8px; border-radius: 50%;
  background: var(--teal-600);
}

/* ============================ frequency callout ============================ */
.rd-callout {
  margin-top: 22px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px;
  background: var(--navy-800); color: #fff; border-radius: var(--radius-md); padding: 16px 20px;
}
.rd-callout__k { font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; background: rgba(255,255,255,.16); padding: 4px 10px; border-radius: 999px; }
.rd-callout__v { font-size: 17px; font-weight: 800; }
.rd-callout__v small { font-size: 13px; font-weight: 600; opacity: .85; }

/* ============================ pricing ============================ */
.rd-plan {
  margin-top: 22px; background: var(--paper);
  border: 1px solid rgba(3,27,104,.14); border-top: 4px solid var(--navy-800);
  border-radius: var(--radius-md); box-shadow: var(--shadow-soft); padding: 26px;
}
.rd-plan__badge { display: inline-flex; font-size: 12px; font-weight: 800; letter-spacing: .04em; color: #fff; background: var(--navy-800); padding: 5px 12px; border-radius: 999px; margin-bottom: 14px; }
.rd-plan__row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; }
.rd-plan__freq { font-size: 17px; font-weight: 800; color: var(--navy-950); }
.rd-plan__price { font-size: 34px; font-weight: 800; color: var(--navy-950); letter-spacing: -0.01em; }
.rd-plan__tax { font-size: 14px; font-weight: 700; color: var(--muted); }
.rd-plan__note { display: inline-block; margin-top: 10px; font-size: 12.5px; font-weight: 700; color: var(--teal-600); background: var(--teal-050); padding: 4px 11px; border-radius: 999px; }
.rd-plan__desc { font-size: 14.5px; color: var(--muted); margin-top: 14px; }

.rd-planopts { display: grid; gap: 12px; margin-top: 16px; }
@media (min-width: 640px) { .rd-planopts { grid-template-columns: 1fr 1fr; } }
.rd-opt { border: 1px solid var(--line); border-radius: var(--radius-md); padding: 18px 20px; background: var(--paper); }
.rd-opt__freq { font-size: 15px; font-weight: 800; color: var(--navy-950); }
.rd-opt__price { font-size: 22px; font-weight: 800; color: var(--navy-950); margin-top: 4px; }
.rd-opt__price small { font-size: 12.5px; font-weight: 700; color: var(--muted); }
.rd-opt__unit { font-size: 12px; color: var(--muted); margin-top: 4px; }
.rd-priceintro { font-size: 14.5px; color: var(--muted); margin: 22px 0 0; }
.rd-priceintro strong { color: var(--navy-950); }

/* ============================ note (lavender support note) ============================ */
.rd-note {
  margin-top: 22px; font-size: 14px; color: var(--muted);
  background: var(--purple-100); border-radius: var(--radius-md); padding: 16px 18px; line-height: 1.7;
}
.rd-note strong { color: var(--navy-950); }

/* ============================ related ============================ */
.rd-rel {
  margin-top: 6px; background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius-md); padding: 24px;
  display: flex; flex-direction: column; gap: 16px;
}
.rd-rel__b { font-size: 14.5px; color: var(--muted); }
.rd-rel__b strong { color: var(--navy-950); font-weight: 700; }
@media (min-width: 700px) {
  .rd-rel { flex-direction: row; align-items: center; justify-content: space-between; gap: 24px; }
  .rd-rel__cta { flex: none; }
}

/* ============================ free trial CTA ============================ */
.rd .free-trial-cta { background: var(--purple-100); text-align: center; padding: 56px 0; }
.rd .free-trial-cta h2 { font-size: 25px; line-height: 1.3; font-weight: 700; color: var(--navy-950); margin-bottom: 8px; }
.rd .free-trial-cta__sub { font-size: 15px; color: var(--purple-700); font-weight: 600; margin-bottom: 18px; }
.rd .free-trial-cta ul { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 18px; margin-bottom: 24px; padding: 0; }
.rd .free-trial-cta li { font-size: 14px; color: var(--ink); font-weight: 600; display: inline-flex; align-items: center; gap: 7px; }
.rd .free-trial-cta li::before { content: "✓"; color: var(--teal-600); font-weight: 800; }

/* ---------- responsive ---------- */
@media (min-width: 640px) {
  .rd-section { padding: 72px 0; }
  .rd-hero { padding: 48px 0 56px; }
  .rd-hero__title { font-size: 34px; }
  .rd-h2 { font-size: 28px; }
  .rd .free-trial-cta h2 { font-size: 30px; }
  .rd .free-trial-cta { padding: 72px 0; }
  .rd-plan__price { font-size: 40px; }
}
@media (prefers-reduced-motion: reduce) { .rd * { transition: none !important; } }
.rd :where(a, button):focus-visible { outline: 3px solid var(--navy-700); outline-offset: 2px; border-radius: 6px; }
.rd [id] { scroll-margin-top: 24px; }