/* Academic calendar — home board layout */
.calendar-section--board {
  --cal-ink: #0c1f45;
  --cal-blue: #2563eb;
  --cal-blue-soft: #dbeafe;
  --cal-surface: #ffffff;
  --cal-muted: #475569;
  --cal-line: #e2e8f0;
  --cal-urgent: #b91c1c;
  --cal-urgent-bg: #fef2f2;
  --cal-soon: #1d4ed8;
  --cal-soon-bg: #eff6ff;
  background:
    linear-gradient(180deg, #f8fafc 0%, #eff6ff 48%, #f8fafc 100%);
  padding-block: clamp(3rem, 6vw, 5rem);
  overflow: hidden;
}

.cal-board {
  display: grid;
  grid-template-columns: minmax(240px, 0.95fr) minmax(0, 1.35fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  align-items: start;
}

.cal-board__intro {
  position: relative;
  padding: clamp(1.75rem, 3.5vw, 2.5rem);
  border-radius: 20px;
  background:
    radial-gradient(ellipse 120% 80% at 100% 0%, rgba(59, 130, 246, 0.35), transparent 55%),
    linear-gradient(155deg, #0c1f45 0%, #1a3a6b 55%, #1e4080 100%);
  color: #fff;
  box-shadow: 0 18px 40px rgba(12, 31, 69, 0.22);
}

.cal-board__eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #93c5fd;
}

.cal-board__title {
  margin: 0 0 0.85rem;
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: #fff;
  text-wrap: balance;
}

.cal-board__desc {
  margin: 0 0 1.75rem;
  max-width: 36ch;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.75;
  color: rgba(219, 234, 254, 0.92);
}

.cal-board__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.35rem;
  border-radius: 10px;
  background: #fff;
  color: #1e4080;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition:
    transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    background-color 0.25s ease;
}

.cal-board__cta:hover {
  background: #eff6ff;
  color: #1d4ed8;
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.28);
}

.cal-board__cta i {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.cal-board__cta:hover i {
  transform: translateX(-3px);
}

.cal-board__timeline {
  list-style: none;
  margin: 0;
  padding: 0.25rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.cal-board__timeline::before {
  content: "";
  position: absolute;
  inset-inline-start: 2.35rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--cal-blue), transparent 95%);
  opacity: 0.28;
  pointer-events: none;
}

.cal-item {
  display: grid;
  grid-template-columns: 4.7rem minmax(0, 1fr);
  gap: 1.1rem 1.25rem;
  align-items: start;
  padding: 0.85rem 0 0.85rem 0;
  position: relative;
  opacity: 1;
  transform: none;
  animation: calItemIn 0.55s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.cal-item:nth-child(1) { animation-delay: 0.05s; }
.cal-item:nth-child(2) { animation-delay: 0.12s; }
.cal-item:nth-child(3) { animation-delay: 0.19s; }
.cal-item:nth-child(4) { animation-delay: 0.26s; }

@keyframes calItemIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cal-item + .cal-item {
  border-top: 1px solid var(--cal-line);
}

.cal-item__when {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  min-height: 4.7rem;
  padding: 0.65rem 0.4rem;
  border-radius: 14px;
  background: var(--cal-surface);
  border: 1px solid #bfdbfe;
  box-shadow: 0 6px 16px rgba(12, 31, 69, 0.06);
  position: relative;
  z-index: 1;
  text-align: center;
}

.cal-item__day {
  font-size: 1.65rem;
  font-weight: 900;
  line-height: 1;
  color: var(--cal-blue);
  font-variant-numeric: tabular-nums;
  direction: ltr;
  unicode-bidi: isolate;
}

.cal-item__month {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--cal-ink);
}

.cal-item__year {
  font-size: 0.7rem;
  font-weight: 600;
  color: #64748b;
  direction: ltr;
  unicode-bidi: isolate;
}

.cal-item__body {
  min-width: 0;
  padding: 0.35rem 0.15rem 0.35rem 0;
}

.cal-item__badge {
  display: inline-block;
  margin-bottom: 0.4rem;
  padding: 0.2rem 0.65rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  background: #f1f5f9;
  color: #334155;
}

.cal-item--urgent .cal-item__badge {
  background: var(--cal-urgent-bg);
  color: var(--cal-urgent);
}

.cal-item--upcoming .cal-item__badge {
  background: var(--cal-soon-bg);
  color: var(--cal-soon);
}

.cal-item--urgent .cal-item__when {
  border-color: #fecaca;
  background: linear-gradient(180deg, #fff, #fef2f2);
}

.cal-item--urgent .cal-item__day {
  color: var(--cal-urgent);
}

.cal-item--upcoming .cal-item__when {
  border-color: #93c5fd;
  background: linear-gradient(180deg, #fff, #eff6ff);
}

.cal-item__title {
  margin: 0 0 0.35rem;
  font-size: 1.125rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--cal-ink);
  text-wrap: pretty;
}

.cal-item__text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.7;
  color: var(--cal-muted);
}

.cal-item--empty {
  grid-template-columns: 1fr;
  border: 0;
  padding: 1.5rem;
  background: var(--cal-surface);
  border-radius: 16px;
  border: 1px dashed #cbd5e1;
}

.cal-item--empty .home-empty-state {
  margin: 0;
}

@media (max-width: 900px) {
  .cal-board {
    grid-template-columns: 1fr;
  }

  .cal-board__intro {
    text-align: start;
  }

  .cal-board__desc {
    max-width: none;
  }

  .cal-board__timeline::before {
    inset-inline-start: 2.1rem;
  }
}

@media (max-width: 520px) {
  .cal-item {
    grid-template-columns: 3.85rem minmax(0, 1fr);
    gap: 0.85rem;
  }

  .cal-item__when {
    min-height: 3.85rem;
    padding: 0.5rem 0.25rem;
    border-radius: 12px;
  }

  .cal-item__day {
    font-size: 1.35rem;
  }

  .cal-board__timeline::before {
    inset-inline-start: 1.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cal-item {
    animation: none;
  }

  .cal-board__cta,
  .cal-board__cta i {
    transition: none;
  }

  .cal-board__cta:hover {
    transform: none;
  }
}