.tool-grid, .tool-shell {
  display: grid;
  grid-template-columns: minmax(19rem, .9fr) minmax(0, 1.25fr);
  background: var(--surface);
  border: 1px solid var(--line);
}
.panel, .card { min-width: 0; padding: var(--space-4); }
.input-panel, .tool-input { background: var(--surface); }
.result-panel, .results-panel { border-left: 1px solid var(--line); background: var(--surface-subtle); }
.panel-heading h2, .result-topbar h2, .section-heading h2 { margin: 0; }
.panel-heading p, .result-status, .field-help { margin: .25rem 0 0; color: var(--muted); }
.input-label { display: block; margin-top: var(--space-3); font-weight: 700; }
textarea, input[type="text"], select {
  width: 100%;
  margin-top: .45rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  padding: .75rem;
}
textarea { resize: vertical; min-height: 8rem; }
.field-error, .input-message { display: block; margin: .4rem 0 0; color: var(--danger); font-weight: 700; }
.input-actions, .action-row, .result-actions, .sample-row, .filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: var(--space-3);
  align-items: center;
}
.counter-row { display: flex; justify-content: space-between; gap: 1rem; margin-top: .35rem; color: var(--muted); font-size: .88rem; }
.mode-fieldset, .method-fieldset {
  margin: var(--space-3) 0 0;
  padding: .75rem 1rem 1rem;
  border: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: .7rem 1.2rem;
}
.mode-option, .method-option { display: inline-flex; align-items: center; gap: .5rem; min-height: 2.5rem; }
.mode-option input, .method-option input, .check-item input { width: 1.2rem; height: 1.2rem; accent-color: var(--accent); }
.result-topbar, .results-heading-row { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; }
.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr)); gap: .55rem; margin: var(--space-3) 0; }
.summary-card, .summary-item { padding: .8rem; border-top: 3px solid var(--line-strong); background: var(--surface); }
.summary-card span, .summary-label { display: block; color: var(--muted); font-size: .78rem; }
.summary-card strong, .summary-item strong { display: block; margin-top: .15rem; font-size: 1.55rem; line-height: 1.2; }
.summary-card.danger, .summary-invalid { border-top-color: var(--danger); }
.summary-card.warning, .summary-review { border-top-color: var(--warning); }
.summary-card.success, .summary-ok { border-top-color: var(--success); }
.copy-status, .copy-message, .global-message { min-height: 1.5em; margin: .6rem 0; color: var(--muted); }
.copy-status.error, .copy-status.is-error { color: var(--danger); font-weight: 700; }
.result-list { display: grid; gap: .65rem; }
.result-item, .result-card, .character-card, .pending-item {
  padding: .9rem 1rem;
  border-left: 3px solid var(--line-strong);
  background: var(--surface);
}
.result-item.error, .result-item.danger, .result-item.status-error, .result-card.invalid, .result-card[data-status="invalid"], .is-error { border-left-color: var(--danger); }
.result-item.warning, .result-item.status-warning, .result-card.review, .result-card[data-status="review"], .is-warning { border-left-color: var(--warning); }
.result-item.ok, .result-item.status-ok, .result-card.ok, .result-card[data-status="ok"] { border-left-color: var(--success); }
.result-item h3, .result-card h3, .character-card h3 { margin: 0; font-size: 1rem; }
.result-item p, .result-card p, .character-card p { margin: .3rem 0 0; }
.result-item code, .result-card code { display: inline-block; max-width: 100%; white-space: pre-wrap; word-break: break-all; }
.empty-state, .empty-filter { padding: 1.2rem; border: 1px dashed var(--line-strong); color: var(--muted); text-align: center; }
.badge, .status-badge { display: inline-block; margin-bottom: .35rem; color: var(--muted); font-size: .75rem; font-weight: 700; }
.badge.ok { color: var(--success); }
.badge.warning { color: var(--warning); }
.badge.error { color: var(--danger); }

.highlight-area { margin: var(--space-3) 0; padding: 1rem; background: var(--surface); }
.highlighted-text { font-family: var(--mono); font-size: 1.35rem; letter-spacing: .08em; }
.highlighted-character { background: var(--warning-soft); color: var(--text); }
.comparison-tables { display: grid; gap: var(--space-3); margin-top: var(--space-4); }
.comparison-table { width: 100%; border-collapse: collapse; background: var(--surface); }
.comparison-table th, .comparison-table td { padding: .65rem; border-bottom: 1px solid var(--line); text-align: left; }
.character-glyph { display: block; font-family: var(--mono); font-size: 2.5rem; line-height: 1.2; }
.char-card { display: grid; grid-template-columns: 7rem 1fr; gap: 1rem; padding: 1rem; background: var(--surface); border-left: 3px solid var(--accent); }
.big-char-box { display: grid; place-items: center; min-height: 7rem; background: var(--surface-subtle); font-family: var(--mono); font-size: 3rem; }
.char-details h3 { margin: 0; }
.detail-grid { display: grid; grid-template-columns: 8rem 1fr; gap: .25rem .75rem; margin: .6rem 0; }
.detail-grid dt { color: var(--muted); }
.detail-grid dd { margin: 0; min-width: 0; }
.similar-row { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .4rem; }
.similar-chip { padding: .25rem .45rem; background: var(--code-bg); font-family: var(--mono); }

.dual-input { display: grid; grid-template-columns: 1.25fr .75fr; gap: var(--space-3); }
.preview-section { margin-top: var(--space-4); padding-top: var(--space-3); border-top: 1px solid var(--line); }
.preview-fields, .preview-inputs { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: .7rem; }
.preview-field label { display: block; font-weight: 700; }
.preview-output { min-height: 6rem; padding: 1rem; white-space: pre-wrap; background: var(--surface); border: 1px solid var(--line); }
.token-list { display: flex; flex-wrap: wrap; gap: .35rem; }
.token { padding: .2rem .45rem; background: var(--code-bg); font-family: var(--mono); }
.token.danger { color: var(--danger); }
.token.warning { color: var(--warning); }
.result-group { margin-top: var(--space-3); padding: 1rem; background: var(--surface); border-left: 3px solid var(--line-strong); }
.result-group h3, .result-group p { margin: 0; }
.result-group .token-list, .result-group .issue-list { margin-top: .6rem; }
.section-heading-row { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; }
.section-heading-row h3, .section-heading-row p { margin: 0; }
.top-actions, .bottom-actions { display: flex; flex-wrap: wrap; gap: .6rem; }

.check-layout { display: grid; grid-template-columns: 14rem 1fr; gap: var(--space-4); align-items: start; }
.progress-panel { position: sticky; top: 1rem; padding: 1rem; border-top: 3px solid var(--accent); background: var(--surface); }
.progress-count { display: block; margin-top: .3rem; font-size: 1.8rem; font-weight: 700; }
.progress-track { height: .5rem; margin-top: .75rem; background: var(--line); }
.progress-track > span { display: block; width: 0; height: 100%; background: var(--accent); }
.checklist-area { display: grid; gap: var(--space-3); }
.check-step { background: var(--surface); border: 1px solid var(--line); }
.check-step h2 { margin: 0; padding: 1rem; font-size: 1.05rem; border-bottom: 1px solid var(--line); }
.check-item { display: grid; grid-template-columns: auto 1fr; gap: .7rem; padding: .85rem 1rem; border-bottom: 1px solid var(--line); cursor: pointer; }
.check-item:last-child { border-bottom: 0; }
.check-item small { display: block; color: var(--muted); }
.pending-list { display: grid; gap: .45rem; margin-top: var(--space-3); }
.step-card { background: var(--surface); border: 1px solid var(--line); }
.step-heading { display: flex; justify-content: space-between; align-items: baseline; gap: .75rem; padding: .85rem 1rem; border-bottom: 1px solid var(--line); }
.step-heading h3 { margin: 0; font-size: 1.05rem; }
.step-heading span { color: var(--muted); font-size: .82rem; }
.check-items .check-item:last-child { border-bottom: 0; }
.check-text > span { display: block; color: var(--muted); font-size: .9rem; }
.progress-card { margin: var(--space-3) 0; padding: 1rem; background: var(--surface); border-top: 3px solid var(--accent); }
.progress-numbers { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.progress-numbers strong { font-size: 1.65rem; }
.progress-bar { width: 0; height: 100%; background: var(--accent); }
.status-box { margin-top: var(--space-3); padding: 1rem; border-left: 3px solid var(--line-strong); background: var(--surface); }
.status-box.complete { border-left-color: var(--success); background: var(--success-soft); }
.compact-note { margin-top: var(--space-3); color: var(--muted); font-size: .88rem; }

.url-display, .result-url { word-break: break-all; font-family: var(--mono); font-size: .84rem; }
.param-list, .issue-list { margin: .6rem 0 0; padding-left: 1.2rem; }
.result-card-header { display: flex; justify-content: space-between; gap: .7rem; }
.result-url-wrap { display: flex; gap: .65rem; align-items: flex-start; margin-top: .65rem; }
.result-line-number { flex: none; color: var(--muted); font-size: .78rem; }
.result-details { margin-top: .75rem; }
.parameter-list { display: grid; gap: .35rem; margin: .6rem 0 0; }
.parameter-item { display: grid; grid-template-columns: minmax(7.5rem, .35fr) 1fr; gap: .6rem; padding-bottom: .3rem; border-bottom: 1px solid var(--line); }
.parameter-name { font-family: var(--mono); font-size: .82rem; }
.parameter-value { min-width: 0; word-break: break-all; }
.issue-item { margin-top: .35rem; }
.no-issues { color: var(--success); font-weight: 700; }
.copy-url-button { flex: none; min-height: 2.5rem; }
.button-compact { min-height: 2.5rem; padding: .5rem .75rem; }
.feature-grid, .info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
.feature-card, .info-grid article { padding-top: 1rem; border-top: 2px solid var(--line); }
.feature-card h3, .info-grid h3 { margin: .2rem 0; }
.feature-card p, .info-grid p { margin: 0; color: var(--muted); }
.feature-number { color: var(--danger); font-size: .75rem; font-weight: 700; }

@media (max-width: 900px) {
  .tool-grid, .tool-shell { grid-template-columns: 1fr; }
  .result-panel, .results-panel { border-left: 0; border-top: 1px solid var(--line); }
  .check-layout { grid-template-columns: 1fr; }
  .progress-panel { position: static; }
}

@media (max-width: 600px) {
  .panel, .card { padding: 1rem; }
  .input-actions, .action-row { align-items: stretch; flex-direction: column; }
  .input-actions > *, .action-row > * { width: 100%; }
  .result-topbar, .results-heading-row, .counter-row { flex-direction: column; }
  .dual-input, .feature-grid, .info-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .comparison-table { display: block; overflow-x: auto; }
  .result-card-header { flex-direction: column; }
  .char-card, .detail-grid { grid-template-columns: 1fr; }
  .big-char-box { min-height: 5rem; }
  .section-heading-row, .progress-numbers, .result-url-wrap { flex-direction: column; }
  .top-actions { width: 100%; }
  .top-actions > * { flex: 1 1 auto; }
  .parameter-item { grid-template-columns: 1fr; gap: .15rem; }
}