.tone-checker-page {
  --tone-frame-width: 1040px;
  --tone-panel-border: rgba(140, 163, 196, 0.18);
  --tone-shell-bg: linear-gradient(160deg, rgba(12, 21, 38, 0.98), rgba(7, 13, 25, 0.94));
  --tone-panel-bg: linear-gradient(180deg, rgba(17, 28, 49, 0.92), rgba(10, 18, 34, 0.88));
  --tone-panel-soft: linear-gradient(180deg, rgba(21, 36, 62, 0.9), rgba(12, 22, 41, 0.9));
  --tone-panel-shadow: 0 24px 60px rgba(1, 7, 20, 0.42);
  --tone-accent: #84f2d4;
  --tone-accent-strong: #c9fb5f;
  --tone-signal: #78c7ff;
  --tone-text-strong: #eff5ff;
  --tone-text-soft: rgba(226, 236, 248, 0.74);
  --tone-text-faint: rgba(198, 212, 230, 0.56);
}

.tone-checker-page .tool-frame {
  max-width: var(--tone-frame-width);
  margin-inline: auto;
}

.tone-checker-page .tool-header-block {
  max-width: 860px;
}

.tone-checker-page .page-title {
  max-width: none;
  font-size: clamp(2.15rem, 4vw, 3rem);
  line-height: 0.97;
  white-space: nowrap;
}

.tone-checker-page .page-subtitle {
  max-width: 44ch;
}

.tone-shell {
  display: grid;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--tone-panel-border);
  border-radius: 28px;
  background:
    radial-gradient(circle at top left, rgba(120, 199, 255, 0.18), transparent 34%),
    radial-gradient(circle at top right, rgba(132, 242, 212, 0.12), transparent 28%),
    var(--tone-shell-bg);
  box-shadow: var(--tone-panel-shadow);
  overflow: clip;
}

.tone-shell__topbar {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.tone-control-group {
  display: grid;
  gap: 6px;
}

.tone-control-group--rail {
  justify-items: end;
}

.tone-control-label {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tone-text-faint);
}

.tone-language-toggle {
  display: inline-flex;
  gap: 8px;
  padding: 6px;
  border: 1px solid rgba(140, 163, 196, 0.14);
  border-radius: 999px;
  background: rgba(8, 14, 27, 0.6);
}

.tone-passive-rail {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  padding: 6px;
  border: 1px solid rgba(140, 163, 196, 0.14);
  border-radius: 18px;
  background: rgba(8, 14, 27, 0.48);
}

.tone-passive-chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid rgba(120, 199, 255, 0.12);
  background: rgba(120, 199, 255, 0.08);
  color: var(--tone-text-soft);
  font-size: 0.84rem;
}

.tone-passive-chip--accent {
  border-color: rgba(132, 242, 212, 0.16);
  background: rgba(132, 242, 212, 0.08);
}

.tone-language-toggle__button {
  border: 0;
  border-radius: 999px;
  padding: 9px 14px;
  background: transparent;
  color: var(--tone-text-soft);
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease;
}

.tone-language-toggle__button:hover,
.tone-language-toggle__button:focus-visible {
  outline: none;
  background: rgba(120, 199, 255, 0.14);
  color: var(--tone-text-strong);
}

.tone-language-toggle__button.is-active {
  background: linear-gradient(135deg, rgba(120, 199, 255, 0.24), rgba(132, 242, 212, 0.22));
  color: var(--tone-text-strong);
}

.tone-shell__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  gap: 18px;
  align-items: start;
}

.tone-panel {
  min-width: 0;
  display: grid;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--tone-panel-border);
  border-radius: 24px;
  background: var(--tone-panel-bg);
  color: var(--tone-text-strong);
}

.tone-panel--results {
  background: var(--tone-panel-soft);
}

.tone-panel__header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.tone-panel__header--results {
  align-items: stretch;
}

.tone-panel__eyebrow,
.tone-meter-card__label,
.tone-samples__label {
  color: var(--tone-accent);
}

.tone-panel__eyebrow {
  margin: 0 0 6px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
}

.tone-panel__title,
.tone-note-card__header h3 {
  margin: 0;
}

.tone-panel__hint,
.tone-note-card__hint,
.tone-status-rail__hint,
.tone-note-list,
.tone-hero__summary {
  color: var(--tone-text-soft);
}

.tone-panel__hint {
  margin: 0;
  max-width: 38ch;
}

.tone-panel__meta,
.tone-input-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tone-pill,
.tone-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid rgba(132, 242, 212, 0.14);
  background: rgba(132, 242, 212, 0.08);
  color: var(--tone-text-strong);
  font-size: 0.86rem;
}

.tone-badge--quiet {
  border-color: rgba(120, 199, 255, 0.12);
  background: rgba(120, 199, 255, 0.08);
  color: var(--tone-text-soft);
}

.tone-pill--quiet {
  border-color: rgba(120, 199, 255, 0.14);
  background: rgba(120, 199, 255, 0.08);
  color: var(--tone-text-soft);
}

.tone-input {
  width: 100%;
  min-height: 304px;
  resize: vertical;
  border: 1px solid rgba(140, 163, 196, 0.16);
  border-radius: 20px;
  background: rgba(8, 15, 28, 0.8);
  color: var(--tone-text-strong);
  padding: 18px;
  font: inherit;
  line-height: 1.55;
}

.tone-input::placeholder {
  color: var(--tone-text-faint);
}

.tone-input:focus {
  outline: 1px solid rgba(120, 199, 255, 0.4);
  border-color: rgba(120, 199, 255, 0.32);
}

.tone-samples {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.tone-sample-chip {
  border: 1px solid rgba(140, 163, 196, 0.14);
  border-radius: 999px;
  padding: 9px 12px;
  background: rgba(255, 255, 255, 0.02);
  color: var(--tone-text-soft);
  font: inherit;
  cursor: pointer;
}

.tone-sample-chip:hover,
.tone-sample-chip:focus-visible {
  outline: none;
  border-color: rgba(132, 242, 212, 0.24);
  color: var(--tone-text-strong);
}

.tone-status-rail {
  display: grid;
  gap: 6px;
  align-content: start;
  min-width: min(250px, 100%);
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(120, 199, 255, 0.14);
  background: rgba(6, 13, 24, 0.52);
}

.tone-status-rail__label {
  font-size: 0.9rem;
  color: var(--tone-text-strong);
}

.tone-status-rail__hint {
  font-size: 0.78rem;
  line-height: 1.45;
}

.tone-hero {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(6, 13, 24, 0.78), rgba(9, 20, 38, 0.56));
  border: 1px solid rgba(132, 242, 212, 0.12);
}

.tone-hero__row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tone-badge--strong {
  border-color: rgba(201, 251, 95, 0.22);
  background: rgba(201, 251, 95, 0.12);
  color: var(--tone-accent-strong);
}

.tone-hero__summary {
  margin: 0;
  font-size: 1rem;
  line-height: 1.58;
}

.tone-hero__detail {
  margin: 0;
  color: var(--tone-text-faint);
  font-size: 0.86rem;
  line-height: 1.45;
}

.tone-signal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tone-signal-chip {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid rgba(140, 163, 196, 0.16);
  background: rgba(255, 255, 255, 0.03);
  color: var(--tone-text-soft);
  font-size: 0.78rem;
}

.tone-meter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.tone-meter-card,
.tone-note-card {
  padding: 16px;
  border-radius: 20px;
  border: 1px solid rgba(140, 163, 196, 0.14);
  background: rgba(5, 11, 21, 0.42);
}

.tone-meter-card__top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}

.tone-meter-card__label,
.tone-meter-card__value {
  margin: 0;
  font-size: 0.9rem;
}

.tone-meter-card__track {
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.tone-meter-card__fill {
  display: block;
  height: 100%;
  width: 50%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--tone-signal), var(--tone-accent));
  transition: width 180ms ease;
}

.tone-result-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.tone-note-card__header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: start;
  margin-bottom: 12px;
}

.tone-note-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.tone-note-list li {
  line-height: 1.5;
}

.tone-suggestion-list {
  display: grid;
  gap: 12px;
}

.tone-suggestion-card {
  display: grid;
  gap: 10px;
  padding: 14px;
  border-radius: 18px;
  border: 1px solid rgba(140, 163, 196, 0.14);
  background: rgba(255, 255, 255, 0.02);
}

.tone-suggestion-card__label,
.tone-suggestion-card__text {
  margin: 0;
}

.tone-suggestion-card__label {
  color: var(--tone-text-strong);
  font-weight: 700;
}

.tone-suggestion-card__text {
  color: var(--tone-text-soft);
  line-height: 1.55;
}

.tone-delta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tone-delta-chip {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid rgba(132, 242, 212, 0.16);
  background: rgba(132, 242, 212, 0.08);
  color: var(--tone-text-strong);
  font-size: 0.76rem;
  letter-spacing: 0.01em;
}

.tone-discovery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.tone-discovery-card {
  padding: 18px;
  border-radius: 22px;
  border: 1px solid rgba(140, 163, 196, 0.14);
  background: linear-gradient(180deg, rgba(8, 14, 26, 0.88), rgba(8, 14, 26, 0.72));
  color: var(--tone-text-soft);
}

.tone-discovery-card__eyebrow {
  margin: 0 0 8px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tone-accent);
}

.tone-discovery-card__title {
  margin: 0 0 12px;
  color: var(--tone-text-strong);
  font-size: 1.04rem;
  line-height: 1.3;
}

.tone-discovery-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 9px;
  line-height: 1.58;
}

.tone-discovery-faq {
  display: grid;
  gap: 10px;
  line-height: 1.58;
}

.tone-discovery-faq p {
  margin: 0;
}

.tone-discovery-faq strong {
  color: var(--tone-text-strong);
}

@media (max-width: 860px) {
  .tone-shell__layout,
  .tone-result-columns,
  .tone-discovery {
    grid-template-columns: 1fr;
  }

  .tone-input {
    min-height: 220px;
  }
}

@media (max-width: 720px) {
  .tone-checker-page .section-tool-page {
    padding-block: 10px 24px;
  }

  .tone-checker-page .tool-frame--analysis {
    gap: 10px;
  }

  .tone-checker-page .tool-header-block {
    max-width: none;
    gap: 4px;
  }

  .tone-checker-page .page-title {
    max-width: none;
    font-size: clamp(1.58rem, 6.5vw, 1.94rem);
    line-height: 1;
  }

  .tone-checker-page .page-subtitle {
    max-width: 26ch;
    font-size: 0.86rem;
  }

  .tone-shell {
    gap: 12px;
    padding: 12px;
    border-radius: 24px;
  }

  .tone-panel {
    gap: 12px;
    padding: 14px;
  }

  .tone-shell__topbar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
    align-items: start;
  }

  .tone-control-label {
    display: none;
  }

  .tone-control-group--rail {
    justify-items: stretch;
  }

  .tone-language-toggle,
  .tone-passive-rail {
    gap: 4px;
    padding: 4px;
  }

  .tone-language-toggle__button,
  .tone-passive-chip {
    padding: 7px 10px;
    font-size: 0.78rem;
  }

  .tone-passive-rail {
    justify-content: flex-start;
  }

  .tone-passive-chip:first-child {
    display: none;
  }

  .tone-panel__header,
  .tone-panel__header--results {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .tone-panel__eyebrow {
    margin-bottom: 4px;
    font-size: 0.72rem;
  }

  .tone-panel__hint {
    font-size: 0.92rem;
    line-height: 1.45;
  }

  .tone-pill,
  .tone-badge {
    min-height: 30px;
    padding-inline: 10px;
    font-size: 0.8rem;
  }

  .tone-hero__detail {
    font-size: 0.8rem;
  }

  .tone-signal-chip {
    min-height: 26px;
    padding-inline: 9px;
    font-size: 0.74rem;
  }

  .tone-delta-chip {
    min-height: 24px;
    padding-inline: 9px;
    font-size: 0.72rem;
  }

  .tone-input {
    min-height: 172px;
    padding: 14px;
    line-height: 1.48;
  }

  .tone-samples {
    gap: 8px;
  }

  .tone-samples__label {
    width: 100%;
    font-size: 0.82rem;
  }

  .tone-sample-chip {
    padding: 8px 11px;
    font-size: 0.82rem;
  }

  .tone-status-rail {
    min-width: 0;
    gap: 4px;
    padding: 10px 12px;
  }

  .tone-status-rail__label {
    font-size: 0.84rem;
  }

  .tone-status-rail__hint {
    font-size: 0.74rem;
  }

  .tone-meter-grid {
    grid-template-columns: 1fr;
  }

  .tone-discovery-card {
    padding: 16px;
  }

  .tone-discovery-card__title {
    font-size: 0.98rem;
  }
}