/* ==========================================================================
   各章节专用样式
   ========================================================================== */

/* ---------- 第 1 章：词表 / 迷你表格 / 总结 ---------- */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(118px, 1fr));
  gap: 8px;
}
.vocab-cell {
  padding: 8px 10px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid transparent;
  display: flex;
  justify-content: center;
  opacity: 0.55;
}
.vocab-cell.used {
  opacity: 1;
  border-color: var(--border-strong);
  background: var(--surface);
}
.id-seq {
  margin-top: 10px;
  padding: 8px 14px;
  border-radius: 10px;
  background: var(--surface-2);
  display: inline-block;
  font-size: 15px;
}

.mini-tbl-wrap {
  overflow-x: auto;
  margin: 2px 0 8px;
}
table.mini-tbl {
  border-collapse: separate;
  border-spacing: 3px;
  font-family: var(--font-mono);
  font-size: 12.5px;
}
table.mini-tbl th {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-2);
  white-space: nowrap;
  padding: 0 6px 0 0;
  text-align: right;
}
table.mini-tbl thead th {
  text-align: center;
  padding: 0;
}
table.mini-tbl td {
  text-align: center;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
  min-width: 46px;
}
table.mini-tbl tr.strong td {
  background: var(--brand-soft);
  font-weight: 800;
  color: var(--brand-ink);
}

.recap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 20px;
}
.recap .tex-block {
  background: var(--surface-2);
  border-radius: 10px;
  padding: 8px 6px;
}
@media (max-width: 900px) {
  .recap {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- 第 2 章：训练 ---------- */
table.tbl.mid td,
table.tbl.mid th {
  vertical-align: middle;
}
table.tbl.compact td {
  padding: 5px 10px;
  font-size: 13px;
}
table.tbl.compact td:first-child {
  font-weight: 500;
}
table.tbl tr.total td {
  background: var(--surface-2);
  font-weight: 700;
}
table.tbl td.strong {
  font-weight: 800;
  color: var(--grad);
}
.chips {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}
.plabel {
  white-space: nowrap;
}

.corpus {
  display: grid;
  gap: 8px;
}
.corpus-card {
  appearance: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 4px 14px;
  border-radius: 12px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
.corpus-card:hover {
  border-color: var(--brand);
}
.corpus-card.is-on {
  border-color: var(--brand);
  background: var(--brand-soft);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 18%, transparent);
}
.corpus-card .ts-item {
  padding: 4px 3px;
}
.corpus-n {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-2);
  white-space: nowrap;
}

.tf-grid {
  display: grid;
  grid-template-columns: 64px repeat(var(--n), minmax(0, 1fr));
  gap: 8px 6px;
  align-items: center;
}
.tf-lab {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--muted);
}
.tf-pos {
  font-size: 11.5px;
  color: var(--muted);
  text-align: center;
  font-family: var(--font-mono);
}
.tf-cell {
  display: flex;
  justify-content: center;
}
.tf-cell.ans .tok {
  box-shadow: 0 0 0 2px var(--grad-soft);
}

/* loss 进度条：当前平均 loss 在“瞎猜”和“理论下限”之间的位置 */
.meter {
  position: relative;
  margin: 4px 44px 0;
  padding: 28px 0 44px;
}
.meter-track {
  height: 16px;
  border-radius: 999px;
  background: var(--surface-3);
  overflow: hidden;
}
.meter-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--good), var(--warn) 60%, var(--grad));
  transition: width 0.4s ease;
}
.meter-val {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  padding: 0 8px;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 13px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  white-space: nowrap;
}
.meter-mark {
  position: absolute;
  top: 22px;
  width: 0;
}
.meter-mark i {
  position: absolute;
  top: 0;
  left: -1px;
  width: 2px;
  height: 28px;
  background: currentColor;
}
.meter-mark em {
  position: absolute;
  top: 31px;
  left: 0;
  transform: translateX(-50%);
  font-style: normal;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}
.meter-mark.floor {
  color: var(--good);
}
.meter-mark.guess {
  color: var(--muted);
}

/* ---------- 通用小件：按钮行 / 实时数据条 / 选中的表格行 ---------- */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.live-stat {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}
.live-stat b {
  color: var(--text);
  font-family: var(--font-mono);
}
table.tbl tr.is-sel td {
  background: var(--brand-soft);
}

/* ---------- 训练章：更新参数（山坡图 / SGD / Adam / 批量）---------- */
.part {
  margin-top: 34px;
}
.part > h4 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin-bottom: 12px;
  font-size: 18px;
}
.part-n {
  display: inline-grid;
  place-items: center;
  flex: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--grad-soft);
  color: var(--grad);
  font-size: 15px;
  font-weight: 800;
}
.part-hint {
  font-size: 13.5px;
  font-weight: 500;
}
.slice-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}
.slice-panel {
  padding: 14px 14px 10px;
}
.legend-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--muted);
}
.legend-row .lg {
  display: inline-block;
  width: 20px;
  height: 0;
  margin-right: 6px;
  vertical-align: middle;
  border-top: 3px solid var(--brand);
}
.legend-row .lg-brand {
  border-color: var(--brand);
}
.legend-row .lg-grad {
  border-color: var(--grad);
  border-top-style: dashed;
}
.legend-row .lg-accent {
  border-color: var(--accent);
  border-top-style: dotted;
}

/* ---------- 训练实验室 ---------- */
.lab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  margin-bottom: 18px;
}
.exp-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.exp-cap {
  margin-right: 4px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--muted);
}
.exp-btn.is-on {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand-ink);
}
.exp-note {
  margin-bottom: 18px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--brand);
  border-radius: 10px;
  background: var(--surface-2);
  font-size: 14px;
  color: var(--text-2);
}
.exp-note b {
  color: var(--text);
}
.samples {
  display: grid;
  gap: 6px;
}
.sample {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 10px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
}
.sample.is-ok {
  border-color: color-mix(in srgb, var(--good) 40%, var(--border));
}
.sample.is-bad {
  border-color: color-mix(in srgb, var(--bad) 40%, var(--border));
  background: var(--bad-soft);
}
.sample-mark {
  font-size: 12px;
  font-weight: 700;
  color: var(--good);
  white-space: nowrap;
}
.sample.is-bad .sample-mark {
  color: var(--bad);
}
.tbl-scroll {
  margin-top: 12px;
  overflow-x: auto;
}
table.tbl.lab-tbl th,
table.tbl.lab-tbl td {
  white-space: normal;
}
table.tbl.lab-tbl td:first-child {
  white-space: nowrap;
}
@media (max-width: 640px) {
  table.tbl.lab-tbl th,
  table.tbl.lab-tbl td {
    padding: 5px 6px;
  }
}
.key-list {
  display: grid;
  gap: 6px;
  margin: 12px 0 0;
  padding: 10px 12px;
  list-style: none;
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--text-2);
}
.key-list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.key-list .lg {
  flex: none;
  width: 18px;
  height: 0;
  border-top: 2px dashed var(--muted);
  transform: translateY(-3px);
}
.key-list .lg-floor {
  border-color: var(--good);
}
.key-list .lg-txt {
  padding-left: 26px;
}

/* ---------- 第 3 章 · 推理 ---------- */
.gen-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-1);
}
.gen-cap {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
}
.gen-arrow {
  display: inline-flex;
  color: var(--accent);
}
.gen-arrow svg {
  width: 20px;
  height: 20px;
}
.gen-tok {
  appearance: none;
  padding: 2px;
  border: 2px solid transparent;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
}
.gen-tok.is-on {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}
.gen-step {
  display: block;
}
.gen-ctx {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 14px;
}
.ctx-chip {
  display: inline-flex;
  padding: 2px;
  border: 2px solid transparent;
  border-radius: 999px;
}
.ctx-chip.is-last {
  border-color: var(--accent);
}
.stages {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}
.stage {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-2);
}
.stage-hd {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 13.5px;
}
.stage-no {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
}
.stage-note {
  margin-top: 4px;
}

/* KV cache：重算地图 */
.kv-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.kv-ttl {
  margin-bottom: 6px;
  font-size: 13px;
}
.kv {
  display: grid;
  gap: 3px;
}
.kv-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
.kv-lab {
  flex: none;
  width: 46px;
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}
.kv-cells {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(var(--n), minmax(0, 1fr));
  gap: 2px;
  min-width: 0;
}
.kv-cell {
  display: block;
  aspect-ratio: 1;
  min-height: 7px;
  border-radius: 3px;
  background: var(--surface-3);
}
.kv-cell.kv-empty {
  background: transparent;
  border: 1px dashed var(--border);
}
.kv-cell.kv-re {
  background: var(--warn);
  opacity: 0.85;
}
.kv-cell.kv-pre {
  background: var(--brand);
}
.kv-cell.kv-new {
  background: var(--accent);
}
.kv-cell.kv-hit {
  background: color-mix(in srgb, var(--accent) 28%, var(--surface));
}
.legend-row .kv-cell {
  display: inline-block;
  width: 12px;
  min-height: 12px;
  height: 12px;
  margin-right: 6px;
  vertical-align: middle;
}
.macs {
  display: grid;
  gap: 4px;
}
.mac-row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
}
.mac-bars {
  position: relative;
  height: 16px;
  overflow: hidden;
  border-radius: 4px;
  background: var(--surface-2);
}
.mac-bar {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  border-radius: 4px;
}
.mac-bar.no {
  background: color-mix(in srgb, var(--warn) 70%, transparent);
}
.mac-bar.yes {
  top: 22%;
  height: 56%;
  background: var(--accent);
}
.mac-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  white-space: nowrap;
}
.kv-mem {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.kv-mem > div {
  display: grid;
  gap: 2px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-2);
}
.kv-mem b {
  font-family: var(--font-mono);
  font-size: 22px;
}
.kv-mem b.accent {
  color: var(--accent);
}
@media (max-width: 560px) {
  .kv-pair,
  .kv-mem {
    grid-template-columns: minmax(0, 1fr);
  }
  .mac-row {
    grid-template-columns: 40px minmax(0, 1fr);
  }
  .mac-num {
    grid-column: 1 / -1;
    padding-left: 48px;
  }
}
@media (max-width: 900px) {
  .lab-grid,
  .slice-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* 手机上：面板里放不下的矩阵（8 列 + 行标签）左右滑动，而不是把整页撑宽 */
@media (max-width: 640px) {
  .panel {
    overflow-x: auto;
    scrollbar-width: thin;
  }
}

/* ---------- 总结章 ---------- */
a.inl {
  color: var(--brand-ink);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a.inl:hover {
  text-decoration-thickness: 2px;
}

/* 知识地图 */
.recap-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin: 0 0 12px;
}
.dot,
.mem-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border-radius: 3px;
  vertical-align: -1px;
}
.dot.common {
  background: var(--brand);
}
.dot.train {
  background: var(--grad);
}
.dot.infer {
  background: var(--accent);
}
.recap {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.recap-card {
  --c: var(--brand);
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 16px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 4px solid var(--c);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  transition: transform 0.15s, box-shadow 0.15s;
}
.recap-card.train {
  --c: var(--grad);
}
.recap-card.infer {
  --c: var(--accent);
}
.recap-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}
.recap-card h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 16px;
}
.recap-card h4 svg {
  flex: none;
  width: 19px;
  height: 19px;
  color: var(--c);
}
.recap-card p {
  flex: 1;
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-2);
}
.recap-card > a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  align-self: flex-start;
  font-size: 13px;
  font-weight: 700;
  color: var(--c);
  text-decoration: none;
}
.recap-card > a svg {
  width: 14px;
  height: 14px;
}
.recap-card > a:hover {
  text-decoration: underline;
}

/* 训练 vs 推理对照表 */
.cmp {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}
.cmp-hd,
.cmp-row {
  display: grid;
  grid-template-columns: 138px minmax(0, 1fr) minmax(0, 1fr);
}
.cmp-hd > div {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  font-weight: 800;
  background: var(--surface-2);
}
.cmp-hd svg {
  width: 18px;
  height: 18px;
}
.cmp-hd .tr {
  color: var(--grad);
  box-shadow: inset 0 -3px 0 var(--grad);
}
.cmp-hd .in {
  color: var(--accent);
  box-shadow: inset 0 -3px 0 var(--accent);
}
.cmp-grp {
  padding: 5px 16px;
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: var(--surface-2);
  border-top: 1px solid var(--border);
}
.cmp-row > div {
  padding: 12px 16px;
  font-size: 14.5px;
  line-height: 1.65;
  border-top: 1px solid var(--border);
}
.cmp-row .k {
  font-weight: 700;
  color: var(--text-2);
}
.cmp-row .c.tr {
  background: color-mix(in srgb, var(--grad) 4%, transparent);
}
.cmp-row .c.in {
  background: color-mix(in srgb, var(--accent) 5%, transparent);
}
.cmp-row:hover .k {
  color: var(--text);
}
.cmp code {
  font-size: 0.9em;
}
@media (max-width: 760px) {
  .cmp-hd {
    display: none;
  }
  .cmp-row {
    grid-template-columns: minmax(0, 1fr);
  }
  .cmp-row .k {
    padding: 8px 14px;
    background: var(--surface-2);
    border-top: 1px solid var(--border-strong);
  }
  .cmp-row .c {
    padding: 10px 14px;
    border-top: 0;
  }
  .cmp-row .c::before {
    content: attr(data-tag);
    display: inline-block;
    margin-right: 8px;
    padding: 0 8px;
    border-radius: 99px;
    font-size: 12px;
    font-weight: 800;
    color: #fff;
    background: var(--grad);
  }
  .cmp-row .c.in::before {
    background: var(--accent);
  }
  [data-theme='dark'] .cmp-row .c::before {
    color: #1a0910;
  }
  [data-theme='dark'] .cmp-row .c.in::before {
    color: #04201c;
  }
}

/* 亲手验证 */
.proof {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: 18px;
  align-items: start;
  margin-bottom: 16px;
}
.fp-card {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 4px solid var(--border-strong);
  border-radius: 12px;
  transition: background-color 0.25s, border-color 0.25s;
}
.fp-card.is-same {
  background: var(--good-soft);
  border-left-color: var(--good);
}
.fp-card.is-changed {
  background: var(--grad-soft);
  border-left-color: var(--grad);
}
.fp-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  word-break: break-all;
}
table.proof-tbl td {
  vertical-align: middle;
}
table.proof-tbl td:first-child {
  white-space: normal;
  font-weight: 500;
}
table.proof-tbl .badge {
  white-space: nowrap;
}
@media (max-width: 900px) {
  .proof {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* 放大到真实模型 */
.why {
  display: grid;
  gap: 8px;
  margin: 0 0 12px;
  padding-left: 1.1em;
  font-size: 14.5px;
  line-height: 1.7;
}
table.ledger-tbl tr.total td {
  font-weight: 800;
  background: var(--surface-2);
  border-top: 2px solid var(--border-strong);
}
table.ledger-tbl td:first-child,
table.scale-tbl td:first-child {
  white-space: normal;
}
table.scale-tbl td:first-child {
  font-weight: 600;
}
.mem {
  display: grid;
  gap: 14px;
}
.mem-block {
  display: grid;
  gap: 4px;
}
.mem-row {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}
.mem-name {
  font-size: 13.5px;
  font-weight: 800;
}
.mem-name.train {
  color: var(--grad);
}
.mem-name.infer {
  color: var(--accent);
}
.mem-track {
  display: flex;
  height: 28px;
  overflow: hidden;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.mem-seg {
  height: 100%;
  min-width: 2px;
  transition: width 0.35s ease;
}
.mem-seg.w,
.mem-dot.w {
  background: var(--brand);
}
.mem-seg.g,
.mem-dot.g {
  background: var(--grad);
}
.mem-seg.o,
.mem-dot.o {
  background: var(--k);
}
.mem-seg.kv,
.mem-dot.kv {
  background: var(--accent);
}
.mem-total {
  font-family: var(--font-mono);
  font-size: 14px;
  white-space: nowrap;
}
.mem-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 14px;
  padding-left: 48px;
}
@media (max-width: 560px) {
  .mem-row {
    grid-template-columns: 38px minmax(0, 1fr);
  }
  .mem-total {
    grid-column: 2;
  }
  .mem-legend {
    padding-left: 0;
  }
}

/* 延伸阅读 */
.read-grp h5 {
  margin: 20px 0 8px;
  font-size: 14px;
  color: var(--text-2);
}
.read-grp:first-child h5 {
  margin-top: 0;
}
.reading {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.read-card {
  display: grid;
  gap: 3px;
  align-content: start;
  padding: 12px 14px;
  color: inherit;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.read-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-1);
  transform: translateY(-1px);
}
.read-card > b {
  color: var(--text);
  line-height: 1.45;
}
.read-card > b svg {
  width: 13px;
  height: 13px;
  margin-left: 6px;
  vertical-align: -1px;
  color: var(--muted);
}
.read-card .src {
  font-size: 12.5px;
  color: var(--muted);
}
.read-card p {
  margin: 2px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-2);
}
.read-grp + .callout,
.reading + .callout {
  margin-top: 20px;
}
@media (max-width: 900px) {
  .recap {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 760px) {
  .reading {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 520px) {
  .recap {
    grid-template-columns: minmax(0, 1fr);
  }
}