.bdfm {
  --bdfm-base: #f8f2df;
  --bdfm-main: #960a33;
  --bdfm-accent: #c35e74;
  --bdfm-text: #543330;
  --bdfm-white: #fffdfa;
  --bdfm-line: rgba(150, 10, 51, .16);
  color: var(--bdfm-text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.8;
}

.bdfm *, .bdfm *::before, .bdfm *::after { box-sizing: border-box; }
.bdfm h1, .bdfm h3, .bdfm p, .bdfm__section-title { margin: 0; }
.bdfm h1, .bdfm h3, .bdfm__section-title { color: var(--bdfm-main); line-height: 1.45; }
.bdfm ul, .bdfm ol { margin: 0; padding-left: 1.35em; }

.bdfm__hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(44px, 8vw, 90px) clamp(22px, 5vw, 72px);
  color: var(--bdfm-white);
  text-align: center;
  background: linear-gradient(135deg, #960a33 0%, #b53758 62%, #c35e74 100%);
  border-radius: 28px 28px 0 0;
}
.bdfm__eyebrow { font-size: .86rem; font-weight: 700; letter-spacing: .12em; }
.bdfm__hero h1 { margin-top: .45rem; color: var(--bdfm-white); font-size: clamp(1.9rem, 4.5vw, 3.25rem); }
.bdfm__lead { margin-top: 1.05rem !important; font-size: clamp(1.05rem, 2.4vw, 1.35rem); font-weight: 700; }
.bdfm__hero > p:last-child { max-width: 710px; margin: 1rem auto 0; }

.bdfm__content { max-width: 1100px; margin: 0 auto; padding: clamp(28px, 6vw, 70px) clamp(16px, 4vw, 42px); background: var(--bdfm-base); }
.bdfm__lesson-materials { display: grid; gap: 20px; margin-bottom: clamp(48px, 8vw, 84px); }
.bdfm__material-action, .bdfm__slide-material { padding: clamp(22px, 4vw, 36px); border: 1px solid var(--bdfm-line); border-radius: 22px; background: var(--bdfm-white); box-shadow: 0 7px 22px rgba(84, 51, 48, .06); }
.bdfm__material-action { text-align: center; background: linear-gradient(145deg, #fffdfa 0%, #f7e4e9 100%); }
.bdfm__material-kicker { color: var(--bdfm-accent); font-size: .76rem; font-weight: 700; letter-spacing: .12em; }
.bdfm__material-title { margin-top: .15rem; color: var(--bdfm-main); font-size: clamp(1.35rem, 3vw, 1.9rem); font-weight: 700; line-height: 1.45; }
.bdfm__material-action > p:last-of-type { margin-top: .55rem; }
.bdfm__reference-button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; margin-top: 1.25rem; padding: 12px 30px; border-radius: 999px; color: #fff !important; font-weight: 700; text-decoration: none !important; background: var(--bdfm-main); box-shadow: 0 6px 14px rgba(150, 10, 51, .2); transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease; }
.bdfm__reference-button:hover { color: #fff !important; background: #7f082b; box-shadow: 0 8px 18px rgba(150, 10, 51, .27); transform: translateY(-1px); }
.bdfm__reference-button:focus-visible { outline: 3px solid var(--bdfm-accent); outline-offset: 3px; }
.bdfm__slide-material .bdfm__material-title { margin-bottom: 1rem; }
.bdfm__canva-embed { position: relative; width: 100%; height: 0; padding-top: 56.25%; overflow: hidden; border-radius: 12px; box-shadow: 0 2px 8px rgba(63, 69, 81, .16); background: #efe6d5; }
.bdfm__canva-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; padding: 0; margin: 0; border: 0; }
.bdfm__canva-link { margin-top: .9rem; }
.bdfm__canva-link p + p { margin-top: .1rem; }
.bdfm__canva-link a { color: var(--bdfm-main); font-weight: 700; overflow-wrap: anywhere; }
.bdfm__section { margin-top: clamp(48px, 8vw, 84px); }
.bdfm__section:first-child { margin-top: 0; }
.bdfm__section-heading { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.bdfm__section-heading > span { display: grid; width: 42px; height: 42px; flex: 0 0 auto; place-items: center; border-radius: 50%; color: var(--bdfm-white); font-size: .78rem; font-weight: 700; background: var(--bdfm-main); }
.bdfm__section-heading p { color: var(--bdfm-accent); font-size: .76rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.bdfm__section-title { display: block; font-size: clamp(1.35rem, 3vw, 1.9rem); font-weight: 700; }

.bdfm__grid { display: grid; gap: 16px; }
.bdfm__grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.bdfm__grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.bdfm__grid--five { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.bdfm__card, .bdfm__definition { padding: 22px; border: 1px solid var(--bdfm-line); border-radius: 18px; background: var(--bdfm-white); box-shadow: 0 5px 16px rgba(84, 51, 48, .05); }
.bdfm__card h3, .bdfm__definition h3 { margin-bottom: .55rem; font-size: 1rem; }
.bdfm__card li + li, .bdfm__definition li + li { margin-top: .3rem; }
.bdfm__compact-list { padding-left: 1.1em !important; font-size: .94rem; }
.bdfm__compact-list li::marker { color: var(--bdfm-accent); }
.bdfm pre { margin: .65rem 0 0; padding: .9rem; overflow-x: auto; border-radius: 10px; color: var(--bdfm-main); background: #fff4f6; font: .84rem/1.7 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.bdfm__before-after { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.bdfm__before, .bdfm__after { padding: 24px; border-radius: 18px; }
.bdfm__before { background: #eee6d5; }
.bdfm__after { color: #fff; background: var(--bdfm-main); }
.bdfm__label { margin-bottom: .5rem !important; font-size: 1.1rem; font-weight: 700; }
.bdfm__after b { color: #ffe4eb; }
.bdfm__catch { max-width: 700px; margin: 24px auto 0 !important; padding: 15px 20px; border-radius: 999px; color: var(--bdfm-main); text-align: center; font-weight: 700; background: #f5dce2; }

.bdfm__tabs { border: 1px solid var(--bdfm-line); border-radius: 18px; overflow: hidden; background: var(--bdfm-white); }
.bdfm__tab-list { display: flex; overflow-x: auto; border-bottom: 1px solid var(--bdfm-line); background: #fff8ed; }
.bdfm__tab-list button { min-width: 106px; padding: 14px 18px; border: 0; border-bottom: 3px solid transparent; color: var(--bdfm-text); font: inherit; font-weight: 700; white-space: nowrap; cursor: pointer; background: transparent; }
.bdfm__tab-list button[aria-selected="true"] { border-bottom-color: var(--bdfm-main); color: var(--bdfm-main); background: var(--bdfm-white); }
.bdfm__tab-list button:focus-visible { outline: 3px solid var(--bdfm-accent); outline-offset: -3px; }
.bdfm__tab-panel { padding: clamp(20px, 4vw, 34px); }
.bdfm__tab-panel h3 { margin-bottom: .7rem; }
.bdfm__tab-panel li + li { margin-top: .45rem; }

.bdfm__checklist { padding: clamp(22px, 4vw, 35px); border-radius: 18px; border: 1px solid var(--bdfm-line); background: #fff7ed; }
.bdfm__checklist li { list-style: "✓  "; padding-left: .28rem; }
.bdfm__checklist li::marker { color: var(--bdfm-main); font-weight: 700; }
.bdfm__checklist li + li { margin-top: .35rem; }
.bdfm__checklist p { margin-top: 1.1rem; padding-top: 1.1rem; border-top: 1px dashed var(--bdfm-line); }

.bdfm__table-wrap { overflow-x: auto; border: 1px solid var(--bdfm-line); border-radius: 16px; background: var(--bdfm-white); }
.bdfm table { width: 100%; min-width: 590px; border-collapse: collapse; text-align: left; }
.bdfm th, .bdfm td { padding: 14px 16px; border-bottom: 1px solid var(--bdfm-line); }
.bdfm tr:last-child td { border-bottom: 0; }
.bdfm th { color: var(--bdfm-white); font-size: .9rem; background: var(--bdfm-main); }
.bdfm__note { margin-top: .8rem !important; font-size: .92rem; }

.bdfm__bridge { padding: clamp(24px, 5vw, 42px); border-radius: 24px; background: #f2dce2; }
.bdfm__bridge .bdfm__grid > div { padding: 18px; border-radius: 14px; background: rgba(255,255,255,.66); }
.bdfm__bridge h3 { margin-bottom: .45rem; font-size: 1rem; }
.bdfm__flow { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 9px; padding: 24px; border-radius: 18px; background: var(--bdfm-white); }
.bdfm__flow span { padding: 8px 13px; border-radius: 999px; color: var(--bdfm-main); font-size: .9rem; font-weight: 700; background: #f7e4e9; }
.bdfm__flow i { color: var(--bdfm-accent); font-style: normal; font-weight: 700; }
.bdfm__compare { display: flex; flex-wrap: wrap; gap: .4rem; justify-content: center; margin-top: 22px; padding: 14px; color: var(--bdfm-main); border-radius: 12px; background: #fff8ed; }
.bdfm__compare s { color: #8a7774; }
.bdfm__summary { padding: clamp(25px, 5vw, 48px); border-radius: 24px; color: var(--bdfm-white); background: var(--bdfm-main); }
.bdfm__summary .bdfm__section-title, .bdfm__summary h3 { color: var(--bdfm-white); }
.bdfm__summary .bdfm__section-heading p { color: #f7c7d3; }
.bdfm__summary .bdfm__section-heading > span { color: var(--bdfm-main); background: var(--bdfm-white); }
.bdfm__summary ul { margin-top: .7rem; }
.bdfm__summary li + li { margin-top: .3rem; }
.bdfm__final-message { margin-top: 1.35rem !important; padding-top: 1.35rem; border-top: 1px solid rgba(255,255,255,.38); font-size: 1.08rem; font-weight: 700; }

@media (max-width: 760px) {
  .bdfm__hero { border-radius: 20px 20px 0 0; }
  .bdfm__content { padding-right: 16px; padding-left: 16px; }
  .bdfm__grid--two, .bdfm__grid--three, .bdfm__grid--five, .bdfm__before-after { grid-template-columns: 1fr; }
  .bdfm__grid--five { gap: 12px; }
  .bdfm__card, .bdfm__definition { padding: 18px; }
  .bdfm__tab-list { justify-content: flex-start; }
  .bdfm__catch { border-radius: 14px; }
  .bdfm__flow { justify-content: flex-start; }
}