/* ===== Usage guide (settings entry + #/settings/guide) ===== */

.ug-entry {
  appearance: none;
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  margin: 0 0 var(--s-6);
  padding: 12px 16px 12px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
  text-align: start;
  cursor: pointer;
  color: inherit;
  font-family: inherit;
  transition:
    transform 0.18s var(--ease-out),
    box-shadow 0.18s var(--ease-out),
    border-color 0.18s var(--ease-out);
}

.ug-entry:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.ug-entry:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.ug-entry-thumbs {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr 1fr;
  width: 92px;
  height: 52px;
  flex-shrink: 0;
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-2);
}

.ug-entry-thumbs img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.usage-guide-page img:not([src]),
.ug-entry-thumbs img:not([src]) {
  opacity: 0;
}

.ug-entry-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1;
}

.ug-entry-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.25;
}

.ug-entry-sub {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.4;
}

.ug-entry-go {
  display: inline-flex;
  color: var(--accent);
  flex-shrink: 0;
}

html:not([dir="rtl"]) .ug-entry-go {
  transform: scaleX(-1);
}

.usage-guide-page {
  display: grid;
  grid-template-columns: 198px minmax(0, 1fr);
  gap: 28px 40px;
  max-width: 1120px;
  margin: 0 auto;
  padding-bottom: var(--s-16);
  align-items: start;
}

.ug-nav {
  position: sticky;
  top: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: var(--s-5);
}

.ug-back {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  padding: 6px 10px 6px 8px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--surface);
  color: var(--text-2);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s,
    border-color 0.15s;
}

.ug-back:hover {
  background: var(--surface-hover);
  color: var(--text);
  border-color: var(--border-strong);
}

.ug-toc-title {
  margin: 4px 0 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}

.ug-toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ug-toc-btn {
  appearance: none;
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px 8px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--text-2);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  text-align: start;
  cursor: pointer;
  line-height: 1.25;
}

.ug-toc-btn:hover,
.ug-toc-btn.is-on {
  background: var(--accent-soft);
  color: var(--text);
}

.ug-toc-n {
  flex: 0 0 1.6em;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.ug-main {
  min-width: 0;
}

.ug-hero {
  padding: var(--s-5) 0 8px;
}

.ug-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.ug-kicker-time {
  padding: 2px 8px;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  letter-spacing: 0.02em;
  text-transform: none;
  font-size: 11px;
}

.ug-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.12;
  color: var(--text);
}

.ug-lead {
  margin: 12px 0 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-2);
}

.ug-lead-cost {
  margin: 10px 0 18px;
  max-width: 46em;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid color-mix(in srgb, var(--ember) 28%, var(--border));
  background: color-mix(in srgb, var(--ember) 7%, var(--surface));
  font-size: 14px;
  line-height: 1.55;
  color: var(--text);
}

.ug-path-wrap {
  margin: 0 0 22px;
}

.ug-path-hint {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-3);
}

.ug-path {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
  margin: 0;
  padding: 14px 8px 12px;
  position: relative;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.ug-path::before {
  content: "";
  position: absolute;
  top: 32px;
  inset-inline: 7%;
  height: 1px;
  background: var(--divider);
  pointer-events: none;
}

.ug-path-step {
  min-width: 0;
}

.ug-path-btn {
  appearance: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-family: inherit;
  cursor: pointer;
  text-align: center;
}

.ug-path-node {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--accent);
  z-index: 1;
}

.ug-path-btn:hover .ug-path-node {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: var(--accent-soft);
}

.ug-path-index {
  position: absolute;
  top: -6px;
  inset-inline-end: -5px;
  min-width: 15px;
  height: 15px;
  padding: 0 3px;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--text-on-accent);
  font-size: 9px;
  font-weight: 700;
  line-height: 15px;
}

.ug-path-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-2);
  line-height: 1.25;
}

.ug-film {
  margin: 0 0 8px;
}

.ug-film-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.ug-chapters {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-bottom: 22px;
}

.ug-chapter {
  scroll-margin-top: 18px;
  padding: 22px 22px 20px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.ug-chapter-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.ug-chapter-num {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.ug-chapter-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
}

.ug-chapter-head h2 {
  margin: 0;
  flex: 1;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  line-height: 1.2;
}

.ug-where {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 11px;
  font-weight: 700;
}

.ug-chapter-body {
  margin: 0 0 14px;
  max-width: 48em;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-2);
}

.ug-chapter-body + .ug-chapter-body {
  margin-top: -6px;
}

.ug-fig {
  margin: 0 0 16px;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.ug-fig-cap {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-3);
}

.ug-shot img,
.ug-cast-face img,
.ug-recipe-art img,
.ug-fix-frame img,
.ug-grade-frame img,
.ug-phone img,
.ug-tl-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.ug-shot-frame,
.ug-cast-face,
.ug-recipe-art,
.ug-fix-frame,
.ug-grade-frame,
.ug-phone {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
}

.ug-shot-frame,
.ug-fix-frame,
.ug-grade-frame {
  aspect-ratio: 16 / 9;
}

.ug-choice-grid,
.ug-aspect-grid,
.ug-prompt-grid,
.ug-grade {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.ug-choice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-2);
}

.ug-choice.is-on {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
}

.ug-choice-ico {
  display: inline-flex;
  color: var(--accent);
  margin-top: 1px;
}

.ug-choice-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.ug-choice-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.ug-choice-hint {
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.35;
}

.ug-aspect {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 14px 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-2);
}

.ug-aspect.is-on {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
}

.ug-aspect-preview {
  overflow: hidden;
  border-radius: 6px;
  border: 1.5px solid var(--text-3);
  background: var(--bg-2);
}

.ug-aspect.is-on .ug-aspect-preview {
  border-color: var(--accent);
}

.ug-aspect-preview--wide {
  width: 88px;
  height: 50px;
}

.ug-aspect-preview--phone {
  width: 30px;
  height: 54px;
}

.ug-aspect-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.ug-aspect-ratio {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.ug-aspect-hint {
  font-size: 11px;
  color: var(--text-3);
}

.ug-recipe-grid,
.ug-cast-grid,
.ug-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.ug-recipe,
.ug-cast,
.ug-shot {
  min-width: 0;
}

.ug-recipe-art {
  aspect-ratio: 16 / 10;
  margin-bottom: 8px;
}

.ug-recipe-art--phone {
  aspect-ratio: 9 / 14;
  max-height: 168px;
  margin-inline: auto;
  width: 58%;
}

.ug-recipe-title,
.ug-cast-name,
.ug-shot-title {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.ug-recipe-meta,
.ug-cast-role,
.ug-shot-meta,
.ug-fix-cap {
  display: block;
  margin-top: 2px;
  font-size: 11px;
  color: var(--text-3);
  line-height: 1.35;
}

.ug-cast-face {
  aspect-ratio: 1;
  margin-bottom: 8px;
  border-radius: 16px;
}

.ug-shot-frame {
  margin-bottom: 8px;
}

.ug-shot-frame--sm,
.ug-grade-frame {
  margin-bottom: 0;
}

.ug-shot-badge {
  position: absolute;
  top: 8px;
  inset-inline-start: 8px;
  padding: 3px 8px;
  border-radius: var(--r-pill);
  font-size: 10px;
  font-weight: 700;
  line-height: 1.3;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
}

.ug-shot-badge--ok {
  background: color-mix(in srgb, var(--green) 88%, black);
  color: #fff;
}

.ug-shot-badge--fix {
  background: color-mix(in srgb, var(--ember) 88%, black);
  color: #fff;
}

.ug-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: rgba(10, 16, 28, 0.18);
}

.ug-play .ui-icon {
  width: 28px;
  height: 28px;
  padding: 6px;
  border-radius: 50%;
  background: rgba(10, 16, 28, 0.55);
}

.ug-shot-frame.is-wait {
  opacity: 0.42;
  filter: grayscale(0.35);
}

.ug-pill {
  display: inline-flex;
  align-items: center;
  margin-bottom: 6px;
  padding: 2px 8px;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.ug-pill--good {
  background: color-mix(in srgb, var(--green) 16%, transparent);
  color: var(--green);
}

.ug-pill--bad {
  background: var(--ember-soft);
  color: var(--ember);
}

.ug-prompt {
  padding: 12px 13px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  min-width: 0;
}

.ug-prompt--good {
  border-color: color-mix(in srgb, var(--green) 32%, var(--border));
  background: color-mix(in srgb, var(--green) 7%, var(--surface));
}

.ug-prompt--bad {
  border-color: color-mix(in srgb, var(--ember) 28%, var(--border));
  background: color-mix(in srgb, var(--ember) 6%, var(--surface));
}

.ug-prompt-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text);
}

.ug-prompt--bad .ug-prompt-text {
  color: var(--text-3);
}

.ug-fake-btn {
  display: inline-flex;
  margin-top: 12px;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--text-on-accent);
  font-size: 12px;
  font-weight: 700;
  pointer-events: none;
}

.ug-fake-btn--ghost {
  background: var(--surface);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
}

.ug-song-split {
  display: grid;
  grid-template-columns: 1.4fr 0.7fr;
  gap: 14px;
  align-items: stretch;
}

.ug-songmap {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr 1.1fr 1.4fr;
  gap: 6px;
  min-height: 92px;
}

.ug-songbar {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 10px;
  border-radius: 10px;
  min-width: 0;
}

.ug-songbar--verse {
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-2);
}

.ug-songbar--chorus {
  background: color-mix(in srgb, var(--accent) 16%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border));
  color: var(--text);
}

.ug-songbar span:first-child {
  font-size: 12px;
  font-weight: 700;
}

.ug-songbar-t {
  font-size: 11px;
  color: var(--text-3);
}

.ug-phone {
  aspect-ratio: 9 / 16;
  max-width: 148px;
  margin-inline: auto;
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
}

.ug-flow,
.ug-fix-pair,
.ug-names {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ug-flow-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.ug-flow-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

.ug-flow-arrow {
  flex-shrink: 0;
  color: var(--text-3);
  font-size: 20px;
  font-weight: 600;
  line-height: 1;
}

html[dir="rtl"] .ug-flow-arrow {
  transform: scaleX(-1);
}

.ug-fix-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ug-fix-col {
  flex: 1;
  min-width: 0;
}

.ug-grade-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-2);
}

.ug-grade-card.is-on {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.ug-grade-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
}

.ug-tl {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
  border-radius: 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
}

.ug-tl-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.ug-tl-lane {
  flex: 0 0 58px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
}

.ug-tl-clip {
  position: relative;
  flex: 1;
  min-width: 0;
  height: 48px;
  border-radius: 8px;
  overflow: hidden;
  color: #fff;
}

.ug-tl-clip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.72);
}

.ug-tl-clip span {
  position: absolute;
  inset-inline-start: 8px;
  bottom: 6px;
  font-size: 11px;
  font-weight: 700;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.55);
}

.ug-tl-clip--a {
  flex: 1.15;
}

.ug-tl-clip--b {
  flex: 0.9;
}

.ug-tl-clip--c {
  flex: 1.35;
}

.ug-tl-audio {
  flex: 1;
  height: 22px;
  border-radius: 6px;
  background:
    repeating-linear-gradient(
      90deg,
      color-mix(in srgb, var(--accent) 40%, transparent) 0 2px,
      transparent 2px 5px
    );
  opacity: 0.75;
}

.ug-chrome {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.ug-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px;
  border-radius: 12px;
  background: var(--surface-pressed);
  flex: 1;
  min-width: 0;
}

.ug-open-editor {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-3);
  border: 1px solid var(--border);
  background: var(--surface);
}

.ug-open-editor.is-on {
  color: var(--text-on-accent);
  background: var(--accent);
  border-color: transparent;
}

.ug-tab {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-3);
}

.ug-tab.is-on {
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  box-shadow: var(--shadow-xs);
}

.ug-name {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  min-width: 0;
}

.ug-name--bad {
  background: color-mix(in srgb, var(--ember) 7%, var(--surface));
  border-color: color-mix(in srgb, var(--ember) 28%, var(--border));
}

.ug-name--good {
  background: color-mix(in srgb, var(--green) 7%, var(--surface));
  border-color: color-mix(in srgb, var(--green) 28%, var(--border));
}

.ug-name-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.ug-name--bad .ug-name-text {
  text-decoration: line-through;
  color: var(--text-3);
}

.ug-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.ug-chip {
  padding: 5px 10px;
  border-radius: var(--r-pill);
  background: var(--bg-2);
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
}

.ug-label {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.ug-bullets,
.ug-ex-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ug-bullets li,
.ug-ex-list li {
  position: relative;
  padding-inline-start: 16px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-2);
}

.ug-bullets li::before,
.ug-ex-list li::before {
  content: "";
  position: absolute;
  top: 0.65em;
  inset-inline-start: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.ug-examples {
  margin: 0 0 4px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
}

.ug-examples .ug-label {
  margin-bottom: 6px;
}

.ug-examples .ug-ex-list {
  margin: 0;
}

.ug-steps {
  list-style: none;
  margin: 4px 0 14px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}

.ug-steps li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.ug-steps-n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
}

.ug-steps-text {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-2);
}

.ug-tip {
  margin-top: 4px;
  padding: 12px 14px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-2));
  border: 1px solid color-mix(in srgb, var(--accent) 18%, var(--border));
}

.ug-tip .ug-pill {
  margin-bottom: 4px;
}

.ug-tip p {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-2);
}

.ug-worked-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  counter-reset: ug-worked;
}

.ug-worked-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-2);
  counter-increment: ug-worked;
}

.ug-worked-list li::before {
  content: counter(ug-worked);
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  line-height: 22px;
  text-align: center;
}

.ug-faq {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}

.ug-faq-item {
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-2);
}

.ug-faq-q {
  margin: 0 0 6px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.ug-faq-a {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-2);
}

.ug-rules {
  padding: 22px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
}

.ug-rules h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.ug-rules-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.ug-rule {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  border-radius: 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
}

.ug-rule-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
}

.ug-rule p {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-2);
}

@media (max-width: 860px) {
  .usage-guide-page {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .ug-nav {
    position: static;
    padding-top: var(--s-5);
  }

  .ug-toc {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .ug-toc-btn {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 12px;
  }
}

@media (max-width: 640px) {
  .ug-hero h1 {
    font-size: 26px;
  }

  .ug-chapter {
    padding: 16px;
  }

  .ug-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    row-gap: 14px;
  }

  .ug-path::before {
    display: none;
  }

  .ug-choice-grid,
  .ug-aspect-grid,
  .ug-prompt-grid,
  .ug-grade,
  .ug-recipe-grid,
  .ug-cast-grid,
  .ug-board,
  .ug-film-row,
  .ug-steps,
  .ug-rules-grid,
  .ug-song-split {
    grid-template-columns: 1fr;
  }

  .ug-songmap {
    grid-template-columns: 1fr 1fr;
    height: auto;
  }

  .ug-phone {
    max-width: 120px;
  }

  .ug-flow,
  .ug-fix-pair,
  .ug-names {
    flex-direction: column;
    align-items: stretch;
  }

  .ug-flow-arrow {
    align-self: center;
    transform: rotate(90deg);
  }

  html[dir="rtl"] .ug-flow-arrow {
    transform: rotate(90deg);
  }

  .ug-entry-thumbs {
    width: 72px;
    height: 44px;
  }
}

.ug-tool-groups {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.ug-tool-group {
  padding: 10px 12px 2px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: color-mix(in srgb, var(--bg-2) 65%, var(--surface));
}

.ug-tool-group-title {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.ug-tool-group .ug-chips {
  margin-bottom: 8px;
}

@media (max-width: 640px) {
  .ug-tool-groups {
    grid-template-columns: 1fr;
  }
}