:root {
  font-family:
    Inter, "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Noto Sans JP",
    sans-serif;
  color: #293e35;
  background: #f5f3ed;
  font-synthesis: none;
  font-weight: 400;
  font-size: 14px;
  line-height: 1.6;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
button,
select,
input {
  font: inherit;
}
button,
select {
  color: inherit;
}
button,
a,
input,
select {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
  background: #fffef9;
  border: 1px solid #d9ddd2;
  border-radius: 6px;
  padding: 10px 17px;
  transition:
    background 0.15s,
    transform 0.15s;
}
button:hover {
  background: #edf1e8;
}
button:active {
  transform: translateY(1px);
}
button:disabled {
  cursor: default;
  opacity: 0.55;
}
a {
  color: inherit;
  text-decoration: none;
}
button:focus-visible,
a:focus-visible,
select:focus-visible,
input:focus-visible,
[role="button"]:focus-visible {
  outline: 3px solid #ba7a35;
  outline-offset: 4px;
}
input[type="checkbox"] {
  accent-color: #285748;
  width: 15px;
  height: 15px;
}
select {
  background: #fffef9;
  border: 1px solid #d6d9cf;
  border-radius: 5px;
  min-height: 42px;
  padding: 8px 30px 8px 12px;
  max-width: 100%;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1 {
  font-size: clamp(25px, 3vw, 36px);
  font-weight: 600;
  letter-spacing: 0.035em;
  line-height: 1.45;
}
h2 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 550;
  letter-spacing: -0.025em;
}
h3 {
  font-size: 17px;
  font-weight: 600;
}
.app-shell {
  max-width: 1240px;
  margin: auto;
  padding: 0 48px;
}
.header {
  height: 111px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #d6d9cd;
}
.brand {
  display: flex;
  align-items: center;
  gap: 22px;
}
.brand-mark {
  font-size: 55px;
  font-weight: 600;
  letter-spacing: -7px;
  line-height: 1;
  padding-right: 8px;
}
.brand-mark span {
  color: #b96c48;
}
.brand-caption {
  font-size: 9px;
  letter-spacing: 0.18em;
  line-height: 1.9;
  border-left: 1px solid #cfd3c7;
  padding-left: 20px;
}
.brand-caption b {
  font-size: 10px;
  letter-spacing: 0.15em;
  font-weight: 500;
}
.header-note {
  font-size: 9px;
  letter-spacing: 0.2em;
  display: flex;
  align-items: center;
  gap: 9px;
  color: #7a8275;
}
.status-dot {
  width: 6px;
  height: 6px;
  background: #6b8b65;
  border-radius: 50%;
}
.tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid #d6d9cd;
}
.tab {
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 23px 18px;
  border: 0;
  border-radius: 0;
  background: transparent;
  text-align: left;
  font-size: 14px;
}
.tab:first-child {
  padding-left: 0;
}
.tab.active:after {
  content: "";
  position: absolute;
  height: 3px;
  background: #365f4e;
  bottom: -1px;
  left: 0;
  right: 15px;
}
.tab.active {
  color: #234f3c;
}
.tab-number {
  font-size: 10px;
  color: #9b9f91;
  align-self: flex-start;
  padding-top: 4px;
}
.tab small {
  display: block;
  font-size: 8px;
  letter-spacing: 0.13em;
  color: #969b8d;
  margin-top: 4px;
}
.tab-arrow {
  margin-left: auto;
  font-size: 18px;
  color: #a1a696;
}
.tab.active .tab-arrow {
  color: #426a53;
}
.page-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 40px 0 29px;
}
.eyebrow {
  font-size: 9px;
  letter-spacing: 0.18em;
  font-weight: 600;
  color: #89907e;
  margin-bottom: 10px;
}
.intro {
  font-size: 12px;
  color: #7b8174;
  margin-top: 12px;
  letter-spacing: 0.02em;
}
.chapter {
  font-family: Georgia, serif;
  font-size: 57px;
  color: #b7beaa;
  line-height: 1;
}
.chapter span {
  font-family: Arial, sans-serif;
  font-size: 11px;
  margin-left: 9px;
  color: #919b87;
}
.controls {
  display: flex;
  gap: 18px;
  align-items: end;
  padding: 20px 23px;
  background: #ebece3;
  border: 1px solid #dfe2d5;
  border-radius: 9px;
  margin-bottom: 24px;
}
.controls label {
  font-size: 9px;
  color: #76816e;
  letter-spacing: 0.08em;
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 105px;
}
.controls label.wide-control {
  min-width: 255px;
}
.controls select {
  font-size: 13px;
  letter-spacing: 0;
  color: #334b3c;
  background: #fafbf5;
}
.controls-note {
  margin-left: auto;
  font-size: 8px;
  letter-spacing: 0.14em;
  color: #8b927f;
  padding-bottom: 5px;
}
.controls-note strong {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #717b67;
}
.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 285px;
  gap: 20px;
  margin-bottom: 22px;
}
.panel {
  background: #fffef9;
  border: 1px solid #dedfd5;
  border-radius: 9px;
  overflow: hidden;
}
.notation-panel {
  padding: 24px 25px 20px;
}
.section-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}
.section-top .eyebrow {
  margin-bottom: 5px;
}
.small-tag {
  border: 1px solid #dce1d3;
  border-radius: 20px;
  padding: 5px 10px;
  font-size: 8px;
  letter-spacing: 0.1em;
  color: #88927d;
}
.chord-suffix {
  font-size: 23px;
  margin-left: 4px;
  font-weight: 400;
}
.staff-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  margin: 4px -7px 0;
}
.staff-scroll svg {
  width: 100%;
  min-width: 440px;
  display: block;
  height: auto;
  max-height: 195px;
}
.staff-scroll rect[role="button"]:hover {
  fill: #598768;
  fill-opacity: 0.08;
}
.staff-caption {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: #8d9384;
  font-size: 9px;
  margin-top: -5px;
  padding-bottom: 18px;
  border-bottom: 1px solid #edefe5;
}
.transport {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 18px;
}
.transport button {
  font-size: 11px;
  padding: 10px 13px;
  white-space: nowrap;
}
.primary {
  background: #2f5747;
  color: #fffef4;
  border-color: #2f5747;
}
.primary:hover {
  background: #244535;
}
.stop {
  color: #76816f;
}
.playing-state {
  font-size: 9px;
  color: #929a86;
  margin-left: auto;
}
.tone-panel {
  padding: 25px 22px;
  background: #f0f2e9;
}
.tone-panel h3 {
  font-size: 14px;
  margin-bottom: 19px;
}
.tone-list {
  display: flex;
  flex-direction: column;
}
.tone-row {
  border: 0;
  border-bottom: 1px solid #dde3d4;
  border-radius: 0;
  background: none;
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 11px 0;
  text-align: left;
}
.tone-row:hover,
.tone-row.sounding {
  background: #e3eada;
}
.degree-badge {
  width: 27px;
  height: 27px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 10px;
  flex: none;
}
.tone-row strong {
  font-size: 18px;
  min-width: 24px;
  font-weight: 500;
}
.tone-description {
  font-size: 10px;
  color: #859078;
}
.tiny-play {
  margin-left: auto;
  color: #7e8f71;
}
.aside-note {
  font-size: 10px;
  color: #8a927f;
  margin-top: 19px;
  line-height: 1.9;
}
.fret-panel {
  padding: 24px 25px 0;
  margin-bottom: 22px;
}
.inline-note {
  font-size: 10px;
  font-weight: 400;
  color: #969c8c;
  margin-left: 14px;
}
.range-controls {
  display: flex;
  gap: 9px;
  align-items: center;
  color: #8a927f;
  font-size: 10px;
}
.range-controls label {
  display: flex;
  gap: 9px;
  align-items: center;
}
.range-controls select {
  min-height: 32px;
  font-size: 11px;
  padding: 4px 23px 4px 8px;
  background: #fafbf5;
}
.fret-scroll {
  overflow-x: auto;
  margin-top: 23px;
}
.fretboard {
  display: block;
  width: 100%;
  height: auto;
  max-height: 340px;
}
.fret-number {
  font-size: 10px;
  fill: #909783;
  letter-spacing: 1px;
}
.string-label {
  font-size: 11px;
  fill: #7a8471;
}
.fret-hit {
  cursor: pointer;
}
.fret-hit:hover rect {
  fill: #456742;
  fill-opacity: 0.1;
}
.fret-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 9px;
  color: #939b87;
  gap: 15px;
  margin: 10px 0 20px;
}
.legend {
  display: flex;
  gap: 15px;
  color: #7c8970;
  font-size: 10px;
}
.legend span {
  display: flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}
.legend i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
}
.display-options {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 0 -25px;
  padding: 13px 25px;
  background: #fafaf4;
  border-top: 1px solid #eceee3;
  font-size: 11px;
  color: #7b8770;
}
.display-options > span {
  font-size: 10px;
  color: #9a9f90;
}
.display-options label {
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}
.harmony-panel {
  padding: 24px 25px;
  margin-bottom: 22px;
}
.harmonies {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 9px;
  margin: 20px 0 13px;
}
.harmonies button {
  padding: 12px 5px;
}
.harmonies small {
  font-size: 9px;
  color: #97a18c;
  display: block;
}
.harmonies strong {
  font-size: 17px;
  font-weight: 500;
}
.harmonies .selected {
  background: #e3ecdf;
  border-color: #648464;
}
.check-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
}
.muted {
  font-size: 12px;
  color: #87917d;
  line-height: 1.9;
}
.compatibility {
  border-top: 1px solid #e7e9df;
  margin-top: 20px;
  padding-top: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 12px;
}
.compatibility strong {
  font-weight: 500;
}
.compatibility span {
  color: #77846a;
}
.compatibility select {
  margin-left: auto;
  font-size: 12px;
}
.explanation {
  display: flex;
  gap: 22px;
  margin: 30px 0 32px;
  padding: 24px 22px;
  border-top: 1px solid #d9ddcf;
  border-bottom: 1px solid #d9ddcf;
}
.explanation-icon {
  font-size: 35px;
  color: #91a381;
  line-height: 1.2;
}
.explanation h3 {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 9px;
}
.explanation p:not(.eyebrow) {
  font-size: 12px;
  color: #7b8670;
  line-height: 1.95;
}
.explanation .try-this {
  margin-top: 13px;
  font-size: 10px !important;
  color: #4d6d43 !important;
}
.intervals {
  font-size: 11px;
  color: #89977c;
  margin-top: 12px;
}
.intervals b {
  font-size: 10px;
  font-weight: 400;
  padding: 3px 7px;
  background: #e7ebdf;
  border-radius: 3px;
  margin: 0 5px;
}
.audio-settings {
  display: flex;
  align-items: center;
  gap: 25px;
  padding: 15px 0;
  color: #86917b;
  font-size: 10px;
  border-bottom: 1px solid #dce0d3;
}
.audio-settings label {
  display: flex;
  align-items: center;
  gap: 8px;
}
.audio-settings input {
  width: 100px;
  accent-color: #4f7154;
}
.audio-settings b {
  font-weight: 500;
  min-width: 25px;
}
.audio-settings button {
  margin-left: auto;
  font-size: 10px;
  padding: 6px 13px;
  background: transparent;
}
.quiz-card {
  padding: 28px;
  background: #fffef9;
  border: 1px solid #dce0d3;
  border-radius: 9px;
  margin: 25px 0;
}
.quiz-card h3 {
  margin-top: 25px;
  font-size: 22px;
}
.quiz-card .staff-scroll {
  max-width: 600px;
}
.answer-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 25px 0;
}
.answer-options button {
  min-width: 57px;
  font-size: 18px;
}
.answer {
  padding: 20px;
  background: #eef3e8;
  border-radius: 8px;
  font-size: 14px;
}
.answer p {
  font-size: 12px;
  margin: 10px 0 15px;
}
.answer button {
  margin-right: 10px;
  font-size: 12px;
}
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 30px 0 38px;
  color: #969e8a;
  font-size: 9px;
}
.footer-logo {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -2px;
  color: #7e8c72;
}
.footer-logo span {
  font-size: 8px;
  letter-spacing: 0.1em;
  font-weight: 400;
  margin-left: 10px;
  color: #9aa18f;
}
footer a {
  letter-spacing: 0.15em;
  font-size: 9px;
}
@media (min-width: 1450px) {
  .app-shell {
    max-width: 1300px;
  }
  .page-heading {
    margin-top: 45px;
  }
  .workspace {
    grid-template-columns: minmax(0, 1fr) 310px;
  }
}
@media (max-width: 900px) {
  .app-shell {
    padding: 0 25px;
  }
  .controls {
    flex-wrap: wrap;
  }
  .controls-note {
    display: none;
  }
  .workspace {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 14px;
  }
  .notation-panel,
  .tone-panel {
    padding: 20px 17px;
  }
  .playing-state {
    display: none;
  }
  .tab {
    padding: 20px 10px;
    gap: 8px;
  }
  .tab-arrow {
    display: none;
  }
  .fret-footer {
    align-items: start;
    flex-direction: column;
  }
  .audio-settings {
    gap: 15px;
  }
  .audio-settings input {
    width: 75px;
  }
}
@media (max-width: 680px) {
  .app-shell {
    padding: 0 17px;
  }
  .header {
    height: 86px;
  }
  .header-note {
    display: none;
  }
  .brand-mark {
    font-size: 46px;
  }
  .brand-caption {
    font-size: 8px;
  }
  .tabs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .tab {
    font-size: 11px;
    padding: 17px 2px;
    gap: 3px;
    justify-content: center;
  }
  .tab-number,
  .tab small {
    display: none;
  }
  .tab:first-child {
    padding-left: 2px;
  }
  .tab.active:after {
    right: 0;
  }
  .page-heading {
    margin: 28px 0 23px;
  }
  .page-heading h1 {
    font-size: 24px;
  }
  .intro {
    font-size: 11px;
    max-width: 290px;
  }
  .chapter {
    display: none;
  }
  .controls {
    padding: 15px;
    gap: 12px;
  }
  .controls label {
    min-width: 70px;
    flex: 1;
  }
  .controls label.wide-control {
    min-width: 190px;
  }
  .controls select {
    font-size: 12px;
  }
  .workspace {
    grid-template-columns: 1fr;
  }
  .tone-panel {
    padding: 20px;
  }
  .tone-panel h3 {
    margin-bottom: 10px;
  }
  .tone-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 18px;
  }
  .tone-description {
    font-size: 9px;
  }
  .tone-row {
    gap: 7px;
  }
  .notation-panel {
    padding: 20px;
  }
  .staff-scroll svg {
    min-width: 450px;
  }
  .staff-caption {
    font-size: 8px;
  }
  .fret-panel {
    padding: 19px 15px 0;
  }
  .fret-panel .section-top {
    align-items: start;
  }
  .inline-note {
    display: block;
    margin: 4px 0 0;
  }
  .range-controls {
    gap: 5px;
  }
  .range-controls label {
    gap: 5px;
  }
  .fret-scroll {
    margin-top: 15px;
  }
  .display-options {
    margin: 0 -15px;
    padding: 13px 15px;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 10px;
  }
  .display-options > span {
    display: none;
  }
  .explanation {
    padding: 20px 5px;
    gap: 12px;
  }
  .explanation h3 {
    font-size: 14px;
  }
  .explanation p:not(.eyebrow) {
    font-size: 11px;
  }
  .harmonies {
    grid-template-columns: repeat(4, 1fr);
  }
  .harmony-panel {
    padding: 20px 15px;
  }
  .compatibility {
    align-items: start;
    flex-direction: column;
  }
  .compatibility select {
    margin-left: 0;
  }
  .audio-settings {
    flex-wrap: wrap;
    gap: 12px;
  }
  .audio-settings > span {
    width: 100%;
  }
  .audio-settings label {
    gap: 4px;
  }
  .audio-settings button {
    margin-left: 0;
  }
  .audio-settings input {
    width: 70px;
  }
  footer {
    flex-wrap: wrap;
    padding: 22px 0;
  }
  .quiz-card {
    padding: 20px 16px;
  }
  .quiz-card .section-top {
    align-items: start;
    flex-direction: column;
  }
  .quiz-card h3 {
    font-size: 18px;
  }
  .answer-options {
    gap: 7px;
  }
  .answer-options button {
    padding: 8px 11px;
    min-width: 44px;
  }
  .answer button {
    margin-top: 8px;
  }
  .tone-row strong {
    font-size: 16px;
  }
}
.inspection {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 10px;
  color: #65735b;
  margin: 4px 0 15px;
}
.inspection button {
  font-size: 10px;
  padding: 4px 8px;
}
.direction-label {
  font-size: 10px;
  color: #74836b;
  margin: 0 0 13px;
}

.comparison-panel {
  padding: 24px 25px;
  margin-bottom: 22px;
}
.comparison-intro {
  margin-top: 15px;
}
.comparison-select {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0 12px;
  font-size: 12px;
}
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 18px;
}
.comparison-card {
  min-width: 0;
  padding: 18px;
  background: #f5f6ef;
  border: 1px solid #dce1d3;
  border-radius: 8px;
}
.comparison-card h3 {
  font-size: 15px;
}
.comparison-card > button {
  margin-top: 12px;
  font-size: 12px;
}
.comparison-tones {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 15px;
}
.comparison-tone {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 47px;
  padding: 7px;
  border: 2px solid #b5c0a9;
  font-size: 11px;
}
.comparison-tone.unique {
  border-style: dashed;
  border-color: #9b633d;
}
.comparison-tone strong {
  font-size: 16px;
}
.comparison-tone small {
  font-size: 9px;
}
.comparison-board-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 10px;
  font-size: 12px;
}
.comparison-board-controls button {
  padding: 7px 12px;
}
.comparison-board-controls button[aria-pressed="true"] {
  background: #e3ecdf;
  border-color: #648464;
}
.parent-scale {
  margin-top: 12px;
}
.parent-scale a {
  text-decoration: underline;
  text-underline-offset: 3px;
  color: #365f4e;
}
@media (max-width: 680px) {
  .comparison-panel {
    padding: 20px 15px;
  }
  .comparison-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }
  .comparison-card {
    padding: 15px;
  }
  .comparison-panel .section-top {
    flex-wrap: wrap;
  }
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  padding: 18px 0;
  border-bottom: 1px solid #d6d9cd;
  font-size: 13px;
}
.site-nav a:hover,
.site-footer a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.skip-link {
  position: absolute;
  top: -100px;
  background: #fffef9;
  padding: 12px;
  z-index: 20;
}
.skip-link:focus {
  top: 8px;
}
.learning-start {
  background: #e8ede2;
  border: 1px solid #d2dac9;
  padding: 28px 32px;
  border-radius: 8px;
}
.learning-start h2 {
  font-size: 20px;
  margin-bottom: 10px;
}
.learning-start p {
  max-width: 800px;
  margin-bottom: 18px;
}
.text-link {
  text-decoration: underline;
  text-underline-offset: 5px;
  color: #365f4e;
}
.category-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  padding: 26px 0;
}
.category-links a {
  border-bottom: 1px solid #648464;
  padding: 4px 0;
}
.guide-category {
  scroll-margin-top: 24px;
  margin: 28px 0 64px;
}
.guide-category h2 {
  font-size: 28px;
  margin: 8px 0 24px;
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.guide-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 25px;
  background: #fffef9;
  border: 1px solid #d6d9cf;
  border-radius: 8px;
  transition:
    border-color 0.15s,
    background 0.15s;
}
.guide-card:hover {
  background: #edf1e8;
  border-color: #648464;
}
.guide-card h3 {
  font-size: 19px;
  line-height: 1.6;
}
.guide-card p {
  font-size: 13px;
  color: #54655a;
}
.card-link {
  margin-top: auto;
  padding-top: 8px;
  font-size: 12px;
}
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  margin: 30px 0;
}
.breadcrumbs a {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.guide-article {
  max-width: 780px;
  margin: 0 auto;
}
.article-header {
  margin: 36px 0 32px;
}
.article-header h1 {
  margin: 12px 0 18px;
  font-size: clamp(27px, 4vw, 39px);
  line-height: 1.5;
}
.article-header .intro {
  max-width: none;
}
.article-meta {
  margin-top: 20px;
  font-size: 12px;
  color: #63715f;
}
.article-meta a {
  text-decoration: underline;
}
.article-toc {
  border: 1px solid #d6d9cf;
  border-radius: 8px;
  padding: 24px 28px;
  background: #fffef9;
}
.article-toc h2 {
  font-size: 16px;
  margin-bottom: 12px;
}
.article-toc ol {
  margin: 0;
  padding-left: 24px;
}
.article-toc li {
  padding: 5px 0;
}
.article-toc a {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.article-section {
  margin: 48px 0;
  scroll-margin-top: 24px;
}
.article-section h2 {
  font-size: 23px;
  line-height: 1.6;
  margin-bottom: 18px;
}
.article-section p {
  font-size: 16px;
  line-height: 2;
  margin: 16px 0;
  overflow-wrap: anywhere;
}
.tone-figure {
  margin: 28px 0;
  padding: 24px;
  background: #edf1e8;
  border: 1px solid #d6d9cf;
  border-radius: 8px;
}
.tone-figure figcaption {
  font-size: 12px;
  margin-bottom: 18px;
}
.diagram-row + .diagram-row {
  margin-top: 20px;
}
.diagram-row > strong {
  font-size: 13px;
}
.tone-diagram {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 12px 0 0;
}
.tone-diagram li {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 58px;
  padding: 10px 12px;
  border: 1px solid #a9b79f;
  background: #fffef9;
  border-radius: 5px;
}
.tone-diagram span {
  font-size: 21px;
}
.tone-diagram small {
  font-size: 12px;
  margin-top: 4px;
}
.table-scroll {
  overflow-x: auto;
  margin-top: 16px;
}
.tone-figure table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.tone-figure th,
.tone-figure td {
  padding: 10px 12px;
  border-bottom: 1px solid #ccd5c4;
  text-align: left;
}
.practice-box {
  padding: 28px;
  background: #fffef9;
  border: 1px solid #b5c0a9;
  border-radius: 8px;
  scroll-margin-top: 24px;
}
.practice-box h2 {
  font-size: 24px;
  margin: 10px 0 18px;
}
.practice-box ol {
  padding-left: 22px;
}
.practice-box li {
  line-height: 1.9;
  margin: 12px 0;
}
.try-link {
  display: inline-block;
  padding: 13px 22px;
  background: #285748;
  color: #fffef9;
  border-radius: 5px;
  margin: 16px 0 10px;
}
.try-link:hover {
  background: #364c3d;
}
.practice-note {
  font-size: 12px;
  color: #63715f;
}
.practice-box details {
  border-top: 1px solid #d6d9cf;
  margin-top: 24px;
  padding-top: 16px;
}
.practice-box summary {
  cursor: pointer;
}
.practice-box details p {
  margin-top: 14px;
  line-height: 1.9;
}
.related-guides {
  margin: 64px 0 32px;
}
.related-guides h2 {
  font-size: 24px;
  margin-bottom: 22px;
}
.related-guides .guide-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.related-guides h3 {
  font-size: 16px;
}
.back-to-guides {
  margin: 32px 0 48px;
}
.site-footer {
  align-items: flex-start;
  gap: 24px;
}
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  font-size: 12px;
}
.site-footer nav a {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: #54655a;
}
.info-page {
  max-width: 780px;
  margin: 48px auto 64px;
  padding: 0 12px;
}
.info-page > h1 {
  margin-top: 16px;
}
.policy-links {
  padding-left: 22px;
}
.policy-links li {
  margin: 12px 0;
}
.policy-links a {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.article-ad {
  max-width: 780px;
  margin: 80px auto;
  padding: 32px 0;
  border-top: 1px solid #d6d9cf;
  border-bottom: 1px solid #d6d9cf;
  min-height: 340px;
}
.article-ad > p {
  font-size: 11px;
  color: #63715f;
  margin-bottom: 16px;
  text-align: center;
}
.article-ad ins {
  min-height: 250px;
}
.guide-entry {
  margin: 24px 0;
  border: 1px solid #d6d9cf;
  border-radius: 6px;
  padding: 16px 20px;
  background: #edf1e8;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  align-items: center;
}
.guide-entry p {
  font-size: 13px;
}
.guide-entry a {
  text-decoration: underline;
  text-underline-offset: 4px;
  white-space: nowrap;
}
@media (max-width: 680px) {
  .editorial .app-shell {
    padding: 0 20px;
  }
  .editorial .page-heading {
    margin-top: 32px;
  }
  .learning-start {
    padding: 22px;
  }
  .guide-grid,
  .related-guides .guide-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .guide-card {
    padding: 22px;
  }
  .article-toc {
    padding: 22px;
  }
  .article-section h2 {
    font-size: 21px;
  }
  .article-section p {
    font-size: 15px;
  }
  .tone-figure {
    padding: 18px;
  }
  .tone-diagram li {
    min-width: 48px;
    padding: 8px;
  }
  .practice-box {
    padding: 22px;
  }
  .practice-box h2 {
    font-size: 22px;
  }
  .site-footer {
    flex-direction: column;
  }
  .site-nav {
    gap: 10px 18px;
    font-size: 12px;
  }
  .info-page {
    padding: 0;
  }
}