.header-links {
  margin: 10px 0 0;
  font-weight: 700;
}

.coach-main {
  grid-template-columns: 1.4fr 0.8fr;
}
.coach-steps {
  margin-top: 10px;
  grid-template-columns: 1fr 1fr;
}
@media (min-width: 560px) {
  .coach-steps { grid-template-columns: repeat(4, 1fr); }
}

.split-line {
  margin: 12px 0 0;
  font-family: var(--font-en);
  font-size: clamp(1.05rem, 3.5vw, 1.35rem);
  letter-spacing: 0.04em;
  color: var(--accent-deep);
  min-height: 1.4em;
}
.split-line .chunk {
  display: inline-block;
  margin: 0 4px;
  padding: 2px 8px;
  border-radius: 8px;
  background: #e5f4f0;
}
.split-line .chunk.active {
  background: var(--warm);
  color: #3a2508;
  font-weight: 700;
}

.stress-line {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.tip-box,
.fix-box {
  margin-top: 12px;
  border-radius: 14px;
  padding: 12px 14px;
  line-height: 1.55;
  font-size: 0.95rem;
}
.tip-box {
  background: #eef8f5;
  border: 1px solid #9fd0c8;
  color: var(--ink);
}
.fix-box {
  background: #fff6eb;
  border: 1px solid #f0c48a;
  color: #3a2508;
}
.tip-title,
.fix-title {
  font-weight: 800;
  margin-bottom: 6px;
  font-size: 0.88rem;
}
.tip-box .grammar {
  margin: 8px 0 0;
  color: var(--muted);
}
.fix-box p,
.tip-box p {
  margin: 0;
}

.outline-box,
.fix-summary-box {
  margin: 10px 0 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 10px 14px;
  box-shadow: var(--shadow);
}
.outline-box summary,
.fix-summary-box summary {
  cursor: pointer;
  font-weight: 800;
  color: var(--accent-deep);
}
.outline-list {
  margin: 10px 0 0;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 6px;
  max-height: 220px;
  overflow: auto;
}
.outline-list button {
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  background: #fafcfb;
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
  cursor: pointer;
  color: var(--ink);
}
.outline-list button.active {
  border-color: #9fd0c8;
  background: #eef8f5;
  font-weight: 700;
}
.outline-list button.has-fix {
  border-color: #f0c48a;
  background: #fff8ef;
}
.outline-list .mark {
  display: inline-block;
  margin-left: 6px;
  font-size: 0.78rem;
  color: #9a5b12;
  font-weight: 800;
}
.fix-summary-list {
  margin: 10px 0 0;
  padding-left: 1.1em;
  line-height: 1.55;
  font-size: 0.92rem;
}
.fix-summary-list li {
  margin-bottom: 8px;
}
.fix-summary-list button {
  border: 0;
  background: none;
  color: var(--accent-deep);
  font-weight: 700;
  cursor: pointer;
  padding: 0;
  font: inherit;
}
.fix-history {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed #f0c48a;
  font-size: 0.88rem;
  color: #6b4a22;
}
.fix-history .hist-item {
  margin-top: 6px;
}