.tool-button,
.nav-item,
.mobile-tab,
.button {
  min-height: var(--vt-control-min-h);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, color-mix(in srgb, var(--vt-button-bg) 94%, white 6%), var(--vt-button-bg));
  color: var(--text-main);
  cursor: pointer;
  font-weight: 720;
  letter-spacing: 0;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.tool-button,
.button {
  padding: 0 var(--space-3);
}

.tool-button:hover,
.nav-item:hover,
.mobile-tab:hover,
.button:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--vt-button-bg) 82%, var(--accent) 18%);
  box-shadow: var(--vt-shadow-sm);
}

.tool-button:active,
.nav-item:active,
.mobile-tab:active,
.button:active {
  transform: translateY(1px);
}

.tool-button--primary,
.button--primary {
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  box-shadow: 0 10px 24px color-mix(in srgb, var(--accent) 26%, transparent);
}

.tool-button--ghost,
.button--ghost {
  background: transparent;
  border-color: var(--line-quiet);
  color: var(--text-muted);
}

.button--danger {
  border-color: color-mix(in srgb, var(--vt-danger) 80%, transparent);
  color: var(--vt-danger-text);
}

.button-row {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.nav-item {
  width: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0;
  padding: 0 var(--space-4);
  color: var(--text-muted);
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  white-space: nowrap;
}

.nav-item.is-active,
.mobile-tab.is-active {
  color: var(--accent-strong);
  border-color: color-mix(in srgb, var(--accent) 60%, transparent);
  background: var(--accent-soft);
  box-shadow: inset 0 -3px 0 var(--accent);
}

.button.is-active,
.tool-button.is-active,
.segment.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 var(--space-2);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--text-muted);
}

.status-pill--safe {
  border-color: color-mix(in srgb, var(--vt-safe) 55%, transparent);
  background: var(--vt-safe-bg);
  color: var(--vt-safe-text);
}

.mic-permission-gate {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid color-mix(in srgb, var(--warning) 70%, var(--line-strong));
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--warning) 14%, var(--bg-panel) 86%), var(--bg-panel)),
    var(--bg-panel);
  box-shadow: var(--vt-shadow-sm);
}

.mic-permission-gate + * {
  margin-top: var(--space-3);
}

.mic-permission-gate__content {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  gap: var(--space-3);
}

.mic-permission-gate strong,
.mic-permission-gate p,
.mic-permission-gate small {
  display: block;
  margin: 0;
}

.mic-permission-gate p {
  margin-top: var(--space-1);
  color: var(--text-muted);
}

.mic-permission-gate small {
  margin-top: var(--space-1);
  color: var(--text-faint);
}

.mic-permission-gate--denied,
.mic-permission-gate--insecure-context,
.mic-permission-gate--unsupported {
  border-color: color-mix(in srgb, var(--danger) 70%, var(--line-strong));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--danger) 12%, var(--bg-panel) 88%), var(--bg-panel)),
    var(--bg-panel);
}

.panel,
.module-card,
.graph-panel {
  min-width: 0;
  border: 1px solid var(--line-quiet);
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bg-panel) 94%, white 6%), var(--bg-panel)),
    var(--bg-panel);
  box-shadow: var(--vt-shadow-sm);
}

.panel {
  padding: var(--space-4);
}

.panel-section + .panel-section {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line-quiet);
}

.section-header {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.section-header p {
  color: var(--text-muted);
  margin-top: var(--space-1);
  line-height: var(--vt-line-body);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.field {
  display: grid;
  gap: var(--space-2);
}

.field label {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--vt-input-bg);
  color: var(--vt-input-text);
  padding: 0 var(--space-3);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
  outline: none;
}

.field textarea {
  min-height: 84px;
  padding-top: var(--space-2);
  resize: vertical;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
}

.metric-card {
  max-width: var(--vt-widget-max-md);
  min-height: 82px;
  padding: var(--space-3);
  border: 1px solid var(--line-quiet);
  border-radius: var(--radius-sm);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bg-panel-soft) 90%, white 10%), var(--bg-panel-soft)),
    var(--bg-panel-soft);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035);
}

.vt-density--compact {
  padding: var(--vt-density-compact-pad);
}

.vt-density--regular {
  padding: var(--vt-density-regular-pad);
}

.vt-density--expanded {
  padding: var(--vt-density-expanded-pad);
}

.vt-top-mode-nav {
  justify-content: flex-start;
}

.vt-top-mode-nav .nav-item,
.vt-top-mode-nav .mobile-top-nav__item {
  flex: 0 0 auto;
}

.vt-alert-rail {
  display: grid;
  gap: 4px;
}

.vt-alert-rail:empty {
  display: none;
}

.vt-alert-rail__item {
  min-width: 0;
}

.vt-alert-rail__item[data-alert-priority="critical"] {
  border-color: color-mix(in srgb, var(--warning) 72%, var(--line-strong));
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--warning) 18%, transparent), transparent 42%),
    color-mix(in srgb, var(--bg-panel) 92%, transparent);
}

.vt-alert-rail__item[data-alert-priority="coach"] {
  opacity: 0.92;
}

.vt-alert-rail__detail {
  margin-inline-start: var(--space-2);
  color: var(--text-faint);
}

.metric-card span {
  display: block;
  color: var(--text-faint);
  font-size: 12px;
}

.metric-card strong {
  display: block;
  margin-top: var(--space-2);
  font-size: 22px;
}

.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: var(--space-4);
}

.list-stack {
  display: grid;
  gap: var(--space-3);
}

.data-row {
  display: flex;
  min-width: 0;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--bg-panel-soft) 70%, transparent);
}

.data-row span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.notice {
  border: 1px solid color-mix(in srgb, var(--vt-warning) 55%, transparent);
  border-radius: var(--radius-sm);
  background: var(--vt-warning-bg);
  color: var(--vt-warning-text);
  padding: var(--space-3);
  line-height: var(--vt-line-body);
}

.notice--safe {
  border-color: color-mix(in srgb, var(--vt-safe) 45%, transparent);
  background: var(--vt-safe-bg);
  color: var(--vt-safe-text);
}

.notice--danger {
  border-color: color-mix(in srgb, var(--vt-danger) 60%, transparent);
  background: var(--vt-danger-bg);
  color: var(--vt-danger-text);
}

.empty-state {
  display: grid;
  place-items: center;
  min-height: 220px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  color: var(--text-muted);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-xs);
  background: var(--vt-info-bg);
  color: var(--vt-info-text);
  font-size: 12px;
}

.button:disabled,
.tool-button:disabled,
.nav-item:disabled,
.mobile-tab:disabled,
.field input:disabled,
.field select:disabled,
.field textarea:disabled {
  background: var(--vt-disabled-bg);
  color: var(--vt-disabled-text);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.block-gap-top {
  margin-top: var(--space-3);
}

.block-gap-top-lg {
  margin-top: var(--space-4);
}

.practice-sentence {
  margin-top: var(--space-4);
  font-size: 20px;
  line-height: 1.55;
}

.level-meter {
  height: 12px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--bg-input);
}

.level-meter__bar {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--warning));
  transition: width 90ms linear;
}

/* v0.7.1 component redesign: stronger workstation controls and instrument cards. */
.button,
.tool-button,
.header-utility-button {
  border-color: color-mix(in srgb, var(--vt-workstation-cyan) 18%, var(--line-strong));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--vt-button-bg) 82%, #fff 8%), color-mix(in srgb, var(--vt-button-bg) 92%, #000 8%));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.06),
    0 8px 22px rgba(0, 0, 0, 0.16);
}

.button:hover,
.tool-button:hover,
.header-utility-button:hover {
  border-color: color-mix(in srgb, var(--vt-workstation-cyan) 70%, var(--accent));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--vt-button-bg) 74%, var(--vt-workstation-cyan) 16%), var(--vt-button-bg));
}

.button--primary,
.tool-button--primary {
  border-color: color-mix(in srgb, var(--vt-workstation-cyan) 80%, var(--accent));
  background:
    linear-gradient(135deg, var(--vt-workstation-cyan), var(--vt-workstation-blue) 58%, var(--vt-workstation-violet));
  color: #071117;
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--vt-workstation-cyan) 30%, transparent),
    0 16px 42px color-mix(in srgb, var(--vt-workstation-cyan) 24%, transparent);
}

.nav-item {
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 13px;
  padding-inline: 12px;
  background:
    linear-gradient(90deg, transparent, color-mix(in srgb, var(--vt-workstation-glass) 42%, transparent));
}

.nav-item.is-active {
  color: var(--vt-text-strong);
  border-color: color-mix(in srgb, var(--vt-workstation-cyan) 55%, var(--line-quiet));
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--vt-workstation-cyan) 28%, transparent), color-mix(in srgb, var(--vt-workstation-violet) 10%, transparent)),
    color-mix(in srgb, var(--bg-panel) 82%, transparent);
  box-shadow:
    inset 4px 0 0 var(--vt-workstation-cyan),
    0 10px 26px rgba(0, 0, 0, 0.16);
}

.panel,
.module-card,
.graph-panel {
  border-color: color-mix(in srgb, var(--vt-workstation-cyan) 12%, var(--line-quiet));
  border-radius: 18px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bg-panel) 78%, #fff 8%), color-mix(in srgb, var(--bg-panel) 94%, #000 6%)),
    var(--bg-panel);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.045),
    0 18px 48px rgba(0, 0, 0, 0.18);
}

.panel {
  padding: 18px;
}

.section-header h2 {
  font-size: 18px;
  color: var(--vt-text-strong);
}

.metric-card {
  position: relative;
  overflow: hidden;
  min-height: 96px;
  border-radius: 16px;
  border-color: color-mix(in srgb, var(--vt-workstation-blue) 18%, var(--line-quiet));
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--vt-workstation-blue) 9%, transparent), transparent 58%),
    color-mix(in srgb, var(--bg-panel-soft) 88%, #000 6%);
}

.metric-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--vt-workstation-cyan), var(--vt-workstation-violet));
  opacity: 0.9;
}

.metric-card strong {
  font-size: 24px;
  color: var(--vt-text-strong);
}

.status-pill,
.tag {
  border-color: color-mix(in srgb, var(--vt-workstation-cyan) 30%, var(--line-quiet));
  background: color-mix(in srgb, var(--vt-workstation-cyan) 9%, transparent);
}