/* Styling for Chinese course viewer with 米字格 grid characters. */

.cnp-course-content {
  font-size: clamp(1.35rem, 1.1rem + 1.4vw, 2.1rem);
  line-height: 1.35;
  letter-spacing: 0.08em;
  padding-top: 0;
  padding-bottom: 0;
}

.cnp-course-content span {
  padding-top: 0;
  padding-bottom: 0;
}

.cnp-course-content p {
  margin: 0;
  padding-top: 0;
  padding-bottom: 0;
}


.cnp-course-content .mi-grid-group {
  --mi-grid-size: clamp(2.6rem, 2.2rem + 1.1vw, 3.4rem);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-width: var(--mi-grid-size);
}

.cnp-course-content .mi-grid-cluster {
  display: inline-flex;
  flex-wrap: nowrap;
  align-items: flex-start;
  gap: 0.35rem;
  margin-right: 1rem;
  margin-bottom: 0.75rem;
}

.cnp-course-content .mi-grid-cluster .mi-grid-group {
  margin: 0;
}

.cnp-course-content .mi-grid__pinyin {
  font-size: clamp(1.55rem, 1.35rem + 1vw, 2.3rem);
  font-weight: 600;
  color: rgba(15, 23, 42, 0.78);
  letter-spacing: 0.04em;
  margin-bottom: 0.24rem;
  min-height: 1.5em;
  display: inline-flex;
  align-items: flex-end;
  justify-content: center;
}

.cnp-course-content .mi-grid-group--blank .mi-grid__pinyin {
  visibility: hidden;
}

.cnp-course-content .mi-grid {
  position: relative;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: var(--mi-grid-size);
  height: var(--mi-grid-size);
  font-size: calc(var(--mi-grid-size) * 0.7);
  font-weight: 600;
  color: var(--book-ink);
  border: 1px solid rgba(148, 163, 184, 0.65);
  border-radius: 6px;
  background-color: rgba(255, 255, 255, 0.96);
  background-image:
    linear-gradient(0deg, transparent calc(50% - 0.5px), rgba(148, 163, 184, 0.45) calc(50% - 0.5px), rgba(148, 163, 184, 0.45) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    linear-gradient(90deg, transparent calc(50% - 0.5px), rgba(148, 163, 184, 0.45) calc(50% - 0.5px), rgba(148, 163, 184, 0.45) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    linear-gradient(45deg, transparent calc(50% - 0.5px), rgba(148, 163, 184, 0.3) calc(50% - 0.5px), rgba(148, 163, 184, 0.3) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    linear-gradient(-45deg, transparent calc(50% - 0.5px), rgba(148, 163, 184, 0.3) calc(50% - 0.5px), rgba(148, 163, 184, 0.3) calc(50% + 0.5px), transparent calc(50% + 0.5px));
  background-size: 100% 100%;
  box-shadow: inset 0 2px 8px rgba(15, 23, 42, 0.08);
  box-sizing: border-box;
  vertical-align: top;
}

.cnp-course-content .mi-grid--blank {
  color: transparent;
  background-color: rgba(248, 250, 252, 0.9);
  border-style: dashed;
  opacity: 0.7;
}

.cnp-course-content .mi-grid--blank::after {
  content: '';
}

.cnp-course-content .mi-grid--char {
  font-family: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
}

.cnp-course-content ul,
.cnp-course-content ol {
  padding-left: 1.8rem;
}

.cnp-course-content li {
  margin: 0.4rem 0 0.8rem;
}

.cnp-course-wrap .course-stage {
  padding: 0 32px;
}

.cnp-course-wrap .viewer-select--cnpy {
  margin-left: 0.4rem;
  padding: 0.2rem 0.6rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(15, 23, 42, 0.25);
  background-color: rgba(255, 255, 255, 0.85);
  color: inherit;
  font-size: 0.95rem;
  line-height: 1.2;
  height: 2rem;
}

.cnp-course-wrap .viewer-select--cnpy:focus {
  outline: 2px solid rgba(59, 130, 246, 0.6);
  outline-offset: 1px;
}

@media (max-width: 768px) {
  .cnp-course-content {
    font-size: clamp(1.2rem, 1.05rem + 2vw, 1.8rem);
  }

  .cnp-course-wrap .course-stage {
    padding: 0 20px;
  }

  .cnp-course-content .mi-grid-cluster {
    gap: 0.3rem;
    margin-right: 0.75rem;
    margin-bottom: 0.55rem;
  }
}

@media print {
  .cnp-course-content .mi-grid {
    border-color: #0f172a;
    background-color: #ffffff;
    background-image:
      linear-gradient(0deg, transparent calc(50% - 0.5px), #0f172a calc(50% - 0.5px), #0f172a calc(50% + 0.5px), transparent calc(50% + 0.5px)),
      linear-gradient(90deg, transparent calc(50% - 0.5px), #0f172a calc(50% - 0.5px), #0f172a calc(50% + 0.5px), transparent calc(50% + 0.5px)),
      linear-gradient(45deg, transparent calc(50% - 0.5px), #1e293b calc(50% - 0.5px), #1e293b calc(50% + 0.5px), transparent calc(50% + 0.5px)),
      linear-gradient(-45deg, transparent calc(50% - 0.5px), #1e293b calc(50% - 0.5px), #1e293b calc(50% + 0.5px), transparent calc(50% + 0.5px));
    box-shadow: none;
  }

  .cnp-course-content .mi-grid--blank {
    opacity: 1;
    border-style: solid;
    background-color: #ffffff;
  }
}