/* ==========================================================================
   landing.css — 首頁（點 header 品牌回到這裡）
   ========================================================================== */

.Landing {
  margin: 0 auto;
  padding: 0 var(--base-size-24) var(--base-size-40);
}

.Landing__section {
  padding: var(--base-size-40) 0;
  border-bottom: 1px solid var(--borderColor-muted);
}

.Landing__h2 {
  display: flex;
  align-items: center;
  gap: var(--base-size-8);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.Landing__h2 svg {
  color: var(--fgColor-accent);
}

.Landing__lede {
  max-width: 74ch;
  margin-top: var(--base-size-8);
  font-size: 14px;
  line-height: 1.75;
  color: var(--fgColor-muted);
}

/* --- 三步驟 -------------------------------------------------------------- */

.Steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: var(--base-size-16);
  margin-top: var(--base-size-24);
}

.Step {
  display: flex;
  gap: var(--base-size-12);
  padding: var(--base-size-16);
  background-color: var(--bgColor-muted);
  border: 1px solid var(--borderColor-default);
  border-radius: var(--borderRadius-medium);
}

.Step__n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  color: var(--fgColor-accent);
  background-color: var(--bgColor-default);
  border: 1px solid var(--borderColor-default);
  border-radius: var(--borderRadius-medium);
}

.Step__title {
  font-size: 14px;
  font-weight: 600;
}

.Step__body {
  margin-top: var(--base-size-4);
  font-size: 13px;
  line-height: 1.7;
  color: var(--fgColor-muted);
}

/* --- 立場摘要 ------------------------------------------------------------ */

.Landing__stance {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: var(--base-size-12);
  margin: var(--base-size-24) 0 var(--base-size-16);
}

.LandingStance {
  padding: var(--base-size-16);
  background-color: var(--bgColor-default);
  border: 1px solid var(--borderColor-default);
  border-radius: var(--borderRadius-medium);
}

.LandingStance__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--base-size-8);
  margin-bottom: var(--base-size-8);
  font-size: 13px;
}

.LandingStance p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--fgColor-muted);
}

/* --- 章節總覽 ------------------------------------------------------------ */

.ChapterGrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: var(--base-size-12);
  margin-top: var(--base-size-24);
}

.ChapterCard {
  display: flex;
  gap: var(--base-size-12);
  padding: var(--base-size-12) var(--base-size-16);
  text-align: left;
  background-color: var(--bgColor-default);
  border: 1px solid var(--borderColor-default);
  border-radius: var(--borderRadius-medium);
  transition: border-color 0.12s ease, background-color 0.12s ease;
}

.ChapterCard:hover {
  border-color: var(--borderColor-accent-emphasis);
  background-color: var(--bgColor-muted);
}

.ChapterCard__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  color: var(--fgColor-accent);
  background-color: var(--bgColor-muted);
  border: 1px solid var(--borderColor-default);
  border-radius: var(--borderRadius-medium);
}

.ChapterCard__main {
  min-width: 0;
}

.ChapterCard__title {
  display: block;
  font-size: 14px;
  font-weight: 600;
}

.ChapterCard__meta {
  display: block;
  font-size: 12px;
  color: var(--fgColor-muted);
}

.ChapterCard__units {
  display: block;
  margin-top: var(--base-size-4);
  font-size: 12px;
  line-height: 1.6;
  color: var(--fgColor-muted);
}

/* --- CTA ----------------------------------------------------------------- */

.Landing__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--base-size-24);
  padding: var(--base-size-32) 0 0;
}

.Landing__ctaBtns {
  display: flex;
  flex-wrap: wrap;
  gap: var(--base-size-8);
}

.btn-primary {
  color: var(--fgColor-onEmphasis);
  background-color: var(--fgColor-success);
  border-color: color-mix(in srgb, var(--fgColor-success) 70%, #000);
}

.btn-primary:hover {
  background-color: color-mix(in srgb, var(--fgColor-success) 88%, #000);
}

.btn-primary svg {
  color: currentColor;
}

@media (max-width: 767px) {
  .Landing {
    padding: 0 var(--base-size-16) var(--base-size-32);
  }

  .Landing__section {
    padding: var(--base-size-24) 0;
  }

  .Landing__h2 {
    font-size: 17px;
  }

  /* CTA 與區塊按鈕預設 32px 高，低於觸控下限。 */
  .Landing__ctaBtns .btn,
  .Landing__section > .btn {
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
  }
}

/* --- 繼續學習 ------------------------------------------------------------ */

.ContinueCard {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--base-size-24);
  margin-top: var(--base-size-24);
  padding: var(--base-size-24);
  background-color: var(--bgColor-accent-muted);
  border: 1px solid var(--borderColor-accent-emphasis);
  border-radius: var(--borderRadius-large);
  box-shadow: var(--shadow-resting-small);
}

.ContinueCard__main {
  width: min(640px, 100%);
}

.ContinueCard__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--base-size-8);
  font-family: var(--fontStack-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--fgColor-accent);
  letter-spacing: 0.08em;
}

.ContinueCard__title {
  margin-top: var(--base-size-8);
  font-size: 18px;
  line-height: 1.45;
}

.ContinueCard__progressHead {
  display: flex;
  justify-content: space-between;
  gap: var(--base-size-16);
  margin: var(--base-size-16) 0 var(--base-size-8);
  font-size: 12px;
  color: var(--fgColor-muted);
}

.ContinueCard__progressHead strong {
  color: var(--fgColor-default);
}

.ContinueCard__action {
  flex-shrink: 0;
}

@media (max-width: 767px) {
  .ContinueCard {
    align-items: stretch;
    flex-direction: column;
    gap: var(--base-size-16);
    margin-top: var(--base-size-16);
    padding: var(--base-size-16);
  }

  .ContinueCard__action {
    min-height: 44px;
    justify-content: center;
  }
}