/* ─── リセット ─── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ─── ベース ─── */
body {
  font-family: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  background: #f8f4fb;
  color: #1e1e2e;
  line-height: 1.75;
}

/* ─── ヘッダー ─── */
header {
  position: relative;
  overflow: hidden;
  background: #1e1e2e;
  color: #fff;
  padding: 3rem 1.5rem 2.5rem;
  text-align: center;
}

header::before,
header::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

header::before {
  width: 340px;
  height: 340px;
  background: #f472b6;
  opacity: 0.1;
  top: -120px;
  left: -80px;
}

header::after {
  width: 240px;
  height: 240px;
  background: #c084fc;
  opacity: 0.1;
  bottom: -80px;
  right: -60px;
}

.header-label {
  display: inline-block;
  background: rgba(244, 114, 182, 0.2);
  border: 1px solid rgba(244, 114, 182, 0.45);
  color: #fda4cf;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  padding: 0.25rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 0.9rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  background: linear-gradient(120deg, #fda4cf, #e879f9, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header p {
  margin-top: 0.5rem;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.05em;
}

/* ─── メイン ─── */
main {
  max-width: 820px;
  margin: 2.5rem auto;
  padding: 0 1.25rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* ─── カード ─── */
.card {
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 16px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.9rem 1.4rem;
  font-weight: 700;
  font-size: 0.93rem;
  letter-spacing: 0.04em;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.card-header .icon {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  display: grid;
  place-items: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}

/* カラー別 */
.card-header.pink   { color: #be185d; }
.card-header.pink   .icon { background: #fce7f3; }
.card-header.violet { color: #5b21b6; }
.card-header.violet .icon { background: #ede9fe; }
.card-header.teal   { color: #0f766e; }
.card-header.teal   .icon { background: #ccfbf1; }

.card-body {
  padding: 1.25rem 1.4rem;
}

/* ─── 時間割ボタン ─── */
.timetable-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #1e1e2e;
  color: #fff;
  border-radius: 10px;
  padding: 0.75rem 1.3rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.93rem;
  box-shadow: 0 4px 12px rgba(30, 30, 46, 0.18);
  transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
}

.timetable-link:hover {
  background: #2d2d44;
  box-shadow: 0 6px 18px rgba(30, 30, 46, 0.28);
  transform: translateY(-2px);
}

.timetable-note {
  margin-top: 0.65rem;
  font-size: 0.8rem;
  color: #9ca3af;
}

/* ─── クラスオリエン ─── */
.notice-box {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  background: #fffbeb;
  border: 1.5px solid #fde68a;
  border-radius: 9px;
  padding: 0.75rem 1rem;
  margin-bottom: 1.1rem;
  font-size: 0.87rem;
  font-weight: 600;
  color: #92400e;
}

.orient-item {
  border: 1.5px solid #ede9fe;
  border-radius: 11px;
  overflow: hidden;
}

.orient-item + .orient-item {
  margin-top: 0.9rem;
}

.orient-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1.1rem;
  background: #faf5ff;
}

.orient-date {
  font-weight: 800;
  font-size: 1rem;
  color: #4c1d95;
}

.period-badge {
  background: #7c3aed;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 800;
  padding: 0.3rem 1rem;
  border-radius: 8px;
  white-space: nowrap;
  letter-spacing: 0.03em;
}

.class-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.75rem 1.1rem;
}

.class-tag {
  background: #f5f3ff;
  color: #5b21b6;
  border: 1.5px solid #ddd6fe;
  border-radius: 6px;
  padding: 0.2rem 0.7rem;
  font-size: 0.84rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
}

/* ─── 特別講義 ─── */
.lecture-banner {
  background: linear-gradient(135deg, #f0fdfa, #e0f2fe);
  border: 1.5px solid #a5f3fc;
  border-radius: 11px;
  padding: 1.1rem 1.2rem;
}

.lecture-period {
  font-size: 1.05rem;
  font-weight: 800;
  color: #0e7490;
  margin-bottom: 0.5rem;
}

.lecture-banner p {
  font-size: 0.9rem;
  color: #164e63;
  line-height: 1.85;
}

/* ─── フッター ─── */
footer {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.78rem;
  color: #c4b5fd;
  letter-spacing: 0.06em;
}