:root {
  --ink: #1f2328;
  --muted: #5a6270;
  --accent: #a14a2f;
  --panel: #ffffff;
  --wash: #f6f1ea;
}

body {
  font-family: "Work Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% 10%, #f7efe4, #f1f6f9 45%, #f9f2e8 100%);
  padding: 2.5rem 1.5rem 4rem;
}

main {
  max-width: 900px;
  margin: 0 auto;
  background: var(--panel);
  padding: 2.5rem 3rem;
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(35, 38, 48, 0.12);
}

h1,
h2,
h3 {
  font-family: "Source Serif 4", "Times New Roman", serif;
}

h1 {
  font-size: clamp(2.4rem, 3vw, 3.2rem);
  margin-bottom: 0.4rem;
}

h2 {
  font-size: clamp(1.6rem, 2.2vw, 2rem);
  margin-top: 2.4rem;
}

p,
li {
  font-size: 1.02rem;
}

.course-subtitle {
  color: var(--muted);
  margin-top: 0;
  font-weight: 600;
  letter-spacing: 0.02em;
}

table.schedule {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  min-width: 620px;
}

table.schedule th {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-bottom: 2px solid #e2e5ea;
  padding: 0.6rem 0.75rem;
}

table.schedule td {
  vertical-align: top;
  border-bottom: 1px solid #ebeef2;
  padding: 0.7rem 0.75rem;
}

table.schedule tr:last-child td {
  border-bottom: none;
}

.notice {
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 0.8rem;
}

h2#course-information + dl {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0.4rem 1.4rem;
  margin: 0.8rem 0 0;
}

h2#course-information + dl dt {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0.2rem 0 0;
}

h2#course-information + dl dd {
  margin: 0;
  font-size: 0.95rem;
}

h2#course-information + dl dd ul {
  list-style: none;
  padding-left: 0;
  margin: 0.2rem 0 0.4rem;
}

h2#course-information + dl dd ul li {
  margin: 0.4rem 0;
}

h2#course-information + dl dd ul li + li {
  margin-top: 0.6rem;
}

h2#course-information + dl dd ul li ul {
  list-style: none;
  padding-left: 0;
  margin: 0.2rem 0 0.4rem;
  color: var(--muted);
  font-size: 0.9rem;
}

h2#course-information + dl dd ul li ul strong {
  color: var(--muted);
  font-size: 0.82rem;
  display: inline-block;
  min-width: 110px;
}

.schedule-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.2rem;
}

@media (max-width: 720px) {
  body {
    padding: 1.5rem 1rem 2.5rem;
  }

  main {
    padding: 1.6rem 1.2rem;
    border-radius: 14px;
    box-shadow: 0 14px 30px rgba(35, 38, 48, 0.12);
  }

  h1 {
    font-size: clamp(2rem, 7vw, 2.6rem);
  }

  table.schedule {
    min-width: 520px;
  }

  h2#course-information + ul li {
    display: block;
  }

  h2#course-information + dl {
    display: block;
  }

  h2#course-information + dl dt {
    margin-top: 0.8rem;
  }

  h2#course-information + dl dd ul li ul strong {
    display: block;
    min-width: auto;
    margin-bottom: 0.1rem;
  }
}