:root {
  --bg: #f5efe6;
  --card: #fffaf3;
  --text: #2f241b;
  --muted: #6f5d50;
  --accent: #8a5a3c;
  --accent-dark: #69432f;
  --line: rgba(47, 36, 27, 0.14);
  --shadow: 0 16px 40px rgba(47, 36, 27, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Serif TC", "Microsoft JhengHei", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(138, 90, 60, 0.12), transparent 28%),
    linear-gradient(180deg, #f8f3ec 0%, var(--bg) 100%);
  line-height: 1.8;
}

.hero {
  padding: 4rem 6vw 2rem;
  text-align: center;
}

.eyebrow {
  margin: 0 0 0.6rem;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  color: var(--accent-dark);
}

.hero h1,
.panel h2,
.course-info h2,
.about h2 {
  margin: 0;
  line-height: 1.2;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
}

.hero__lead {
  max-width: 40rem;
  margin: 1rem auto 0;
  color: var(--muted);
}

.layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 6vw 3rem;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.tab {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.95rem 0.8rem;
  background: rgba(255, 255, 255, 0.55);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.tab:hover {
  transform: translateY(-2px);
}

.tab.is-active {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.panels {
  background: rgba(255, 255, 255, 0.25);
  border-radius: 28px;
}

.panel,
.course-info,
.about {
  background: var(--card);
  border: 1px solid rgba(47, 36, 27, 0.08);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 1.8rem;
}

.course-info,
.about {
  margin-top: 1.25rem;
}

.panel p,
.course-info p,
.about p {
  margin: 0.9rem 0 0;
  color: var(--muted);
}

.panel ul,
.course-card ul {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
}

.panel li + li,
.course-card li + li {
  margin-top: 0.5rem;
}

.panel__tag {
  margin: 0 0 0.7rem;
  font-size: 0.85rem;
  color: var(--accent-dark);
  font-weight: 700;
}

.course-info__lead,
.about__slogan {
  color: var(--muted);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: 1rem;
  margin-top: 1rem;
}

.course-grid .course-card {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  width: 100%;
  height: 100%;
  min-height: 100%;
  min-height: 28rem;
}

.course-card__day {
  margin: 0;
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 700;
}

.course-card__price {
  margin: 0.75rem 0 0;
  color: var(--accent);
  font-size: 1.6rem;
  font-weight: 700;
}

.course-card__button {
  margin-top: auto;
  align-self: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--accent);
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: none;
  background: rgba(138, 90, 60, 0.08);
  margin-left: auto;
  margin-right: auto;
}

.course-card__button:hover {
  background: rgba(138, 90, 60, 0.16);
}

.about__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.about__brand,
.about__card {
  border: 1px solid rgba(47, 36, 27, 0.08);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.6);
  padding: 1.25rem;
}

.about__brand {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.logo-mark {
  flex: 0 0 auto;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
}

.about__card {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.link {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.about__photo {
  margin-top: 1rem;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(47, 36, 27, 0.08);
  box-shadow: var(--shadow);
  background: #fff;
}

.about__photo img {
  display: block;
  width: 100%;
  height: 320px;
  object-fit: cover;
  object-position: center 22%;
}

.booking-form {
  margin-top: 1rem;
  border: 1px solid rgba(47, 36, 27, 0.08);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow);
  padding: 1.4rem;
}

.booking-form h2 {
  margin: 0;
  line-height: 1.2;
}

.booking-form p {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

.booking-form__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.booking-form__field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.booking-form__field span {
  font-weight: 700;
  color: var(--accent-dark);
}

.booking-form__field input,
.booking-form__field select,
.booking-form__field textarea {
  width: 100%;
  border: 1px solid rgba(47, 36, 27, 0.16);
  border-radius: 16px;
  padding: 0.9rem 1rem;
  font: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.9);
}

.booking-form__field textarea {
  resize: vertical;
  min-height: 120px;
}

.booking-form__field--full {
  grid-column: 1 / -1;
}

.booking-form__button {
  grid-column: 1 / -1;
  border: 0;
  border-radius: 999px;
  padding: 0.95rem 1.4rem;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.booking-form__button:hover {
  background: var(--accent-dark);
}

.booking-form__notice {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: 18px;
  border: 1px solid rgba(138, 90, 60, 0.18);
  background: rgba(138, 90, 60, 0.08);
  color: var(--text);
}

.booking-form__notice p {
  margin: 0;
}

.booking-form__notice p + p {
  margin-top: 0.5rem;
}

.booking-form__notice a {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.footer {
  padding: 0 6vw 3rem;
  text-align: center;
  color: var(--muted);
}

[hidden] {
  display: none !important;
}

@media (max-width: 760px) {
  .tabs {
    grid-template-columns: 1fr 1fr;
  }

  .course-grid,
  .about__grid {
    grid-template-columns: 1fr;
  }

  .about__brand,
  .about__card {
    flex-direction: column;
    align-items: flex-start;
  }

  .booking-form__grid {
    grid-template-columns: 1fr;
  }

  .about__photo img {
    height: 220px;
  }
}

@media (max-width: 520px) {
  .hero {
    padding-top: 2.5rem;
  }

  .tabs {
    grid-template-columns: 1fr;
  }
}