/* Chromatic Tuner — matches MusEdLab design system */

.tn-container { max-width: 600px; }

.tn-header h1 { font-size: 2.25rem; }
.tn-header h1 .ti {
    font-size: 1.8rem;
    color: var(--color-primary);
    -webkit-text-fill-color: var(--color-primary);
    background: none;
    margin-right: 0.25rem;
}

.tn-main {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.tn-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
}

/* ---- Buttons ---- */
.tn-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 44px;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-strong);
    background: var(--color-surface);
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast),
                transform var(--transition-fast), box-shadow var(--transition-fast);
}
.tn-btn:hover { background: var(--color-background); border-color: var(--color-primary-light); }
.tn-btn:active { transform: translateY(1px); }
.tn-btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent, var(--color-primary-dark)));
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}
.tn-btn-primary:hover { background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary)); border-color: transparent; }
.tn-btn-small { min-height: 36px; padding: 0.35rem 0.75rem; font-size: 0.85rem; }
.tn-btn-stop {
    margin-top: var(--space-md);
    width: 100%;
    background: var(--color-surface);
    color: #b91c1c;
    border-color: #fecaca;
}
.tn-btn-stop:hover {
    background: #fef2f2;
    border-color: #fca5a5;
}

/* ---- Pre-permission card ---- */
.tn-perm-state {
    text-align: center;
    padding: var(--space-md) 0;
}
.tn-perm-state[hidden] { display: none; }
.tn-perm-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 2rem;
}
.tn-perm-icon-error {
    background: #fee2e2;
    color: #b91c1c;
}
.tn-perm-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0 0 var(--space-sm);
}
.tn-perm-body {
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin: 0 auto var(--space-md);
    max-width: 480px;
}
.tn-perm-privacy {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin: 0 0 var(--space-lg);
}
.tn-perm-btn { min-width: 200px; }

/* ---- Status row + visual mode toggle ---- */
.tn-status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}
.tn-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}
.tn-status-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: var(--color-border-strong);
    display: inline-block;
}
.tn-status-dot.tn-status-listening {
    background: #22c55e;
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
    animation: tn-pulse 1.6s ease-out infinite;
}
.tn-status-dot.tn-status-paused { background: #a8a29e; }
.tn-status-dot.tn-status-error { background: #ef4444; }
@keyframes tn-pulse {
    0%   { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.55); }
    70%  { box-shadow: 0 0 0 10px rgba(34, 197, 94, 0); }
    100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.tn-visual-toggle {
    display: inline-flex;
    gap: 0.25rem;
    background: var(--color-background);
    padding: 0.25rem;
    border-radius: var(--radius-md);
}
.tn-vmode-btn {
    min-width: 44px;
    min-height: 36px;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), color var(--transition-fast);
}
.tn-vmode-btn:hover { color: var(--color-text-primary); }
.tn-vmode-btn.is-active {
    background: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--shadow-xs);
}

/* ---- Main display ---- */
.tn-display {
    min-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    text-align: center;
    padding: var(--space-md) 0;
}
.tn-display.is-dim { opacity: 0.45; }

.tn-note-row {
    display: inline-flex;
    align-items: baseline;
    gap: 0.25rem;
    color: var(--color-text-primary);
}
.tn-note-name {
    font-family: var(--font-display);
    font-size: 88px;
    font-weight: 700;
    line-height: 1;
    color: var(--color-primary);
}
.tn-note-octave {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.tn-tune-indicator {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: #16a34a;
    min-height: 1.4rem;
}
.tn-tune-indicator.is-flat,
.tn-tune-indicator.is-sharp { color: #dc2626; }
.tn-tune-indicator[hidden] { visibility: hidden; display: block; }

.tn-freq-row {
    display: inline-flex;
    gap: 0.5rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    font-variant-numeric: tabular-nums;
}
.tn-freq-row[hidden] { visibility: hidden; display: inline-flex; }
.tn-freq-sep { color: var(--color-text-tertiary); }

.tn-cents {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-variant-numeric: tabular-nums;
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    min-height: 1.2rem;
}

/* ---- Gauge ---- */
.tn-gauge-wrap {
    width: 100%;
    height: 130px;
    position: relative;
    margin-top: var(--space-sm);
}
.tn-gauge { width: 100%; height: 100%; position: relative; }
.tn-gauge[hidden] { display: none; }

/* Needle */
.tn-gauge-needle {
    display: flex;
    flex-direction: column;
}
.tn-gauge-zones {
    position: relative;
    height: 18px;
    display: grid;
    grid-template-columns: 22.5% 22.5% 10% 22.5% 22.5%;
    border-radius: 999px;
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.tn-zone-far-flat   { background: #fecaca; }
.tn-zone-mid-flat   { background: #fde68a; }
.tn-zone-in-tune    { background: #bbf7d0; }
.tn-zone-mid-sharp  { background: #fde68a; }
.tn-zone-far-sharp  { background: #fecaca; }

.tn-gauge-ticks {
    position: relative;
    height: 18px;
    margin-top: 2px;
}
.tn-gauge-ticks .tn-tick {
    position: absolute;
    top: 0;
    width: 1px;
    height: 8px;
    background: var(--color-text-tertiary);
    transform: translateX(-50%);
}
.tn-gauge-ticks .tn-tick.is-major { height: 12px; background: var(--color-text-primary); }
.tn-gauge-ticks .tn-tick-label {
    position: absolute;
    top: 10px;
    transform: translateX(-50%);
    font-size: 0.65rem;
    color: var(--color-text-tertiary);
    font-variant-numeric: tabular-nums;
}

.tn-gauge-needle-arm {
    position: absolute;
    left: 50%;
    top: 2px;
    width: 3px;
    height: 70px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transform-origin: 50% 100%;
    transform: translateX(-50%) rotate(0deg);
    transition: transform 0.1s ease-out, background 0.1s ease-out;
    box-shadow: 0 0 6px rgba(0,0,0,0.15);
}
.tn-gauge-needle-arm.is-in-tune { background: #16a34a; }
.tn-gauge-needle-arm.is-near    { background: #d97706; }
.tn-gauge-needle-arm.is-far     { background: #dc2626; }

.tn-gauge-axis {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--color-text-tertiary);
    font-variant-numeric: tabular-nums;
}

/* Strobe */
.tn-gauge-strobe {
    display: flex;
    align-items: center;
    justify-content: center;
}
.tn-gauge-strobe canvas {
    width: 100%;
    height: 100px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-background);
    display: block;
}

/* ---- Controls ---- */
.tn-control-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    margin-top: var(--space-md);
}
.tn-control-label {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 0.95rem;
}
.tn-select {
    min-height: 44px;
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-family: inherit;
    cursor: pointer;
}
.tn-select:disabled { opacity: 0.5; cursor: not-allowed; }
.tn-tuning-row,
.tn-transpose-row {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.tn-tuning-input {
    min-height: 44px;
    width: 6rem;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-family: inherit;
}
.tn-tuning-input[hidden] { display: none; }

.tn-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}
.tn-checkbox input { width: 18px; height: 18px; cursor: pointer; }

.tn-transpose-label {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-style: italic;
    margin-top: -0.25rem;
}
.tn-transpose-label[hidden] { display: none; }

.tn-sens-row {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    flex: 1 1 220px;
    max-width: 360px;
}
.tn-sens-end {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    font-weight: 600;
}
.tn-slider {
    flex: 1 1 auto;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 999px;
    background: var(--color-border);
    outline: none;
}
.tn-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 2px solid var(--color-surface);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}
.tn-slider::-moz-range-thumb {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 2px solid var(--color-surface);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}

/* ---- Collapsibles ---- */
.tn-collapse { margin-top: var(--space-md); }
.tn-collapse-toggle {
    width: 100%;
    background: transparent;
    border: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    font-family: inherit;
    min-height: 44px;
}
.tn-chev { transition: transform var(--transition-base); }
.tn-collapse-toggle[aria-expanded="true"] .tn-chev { transform: rotate(180deg); }
.tn-collapse-panel {
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border);
}
.tn-collapse-panel[hidden] { display: none; }

.tn-history-actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: var(--space-sm);
}
.tn-history-table-wrap {
    max-height: 280px;
    overflow-y: auto;
}
.tn-history-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.tn-history-table th,
.tn-history-table td {
    padding: 0.4rem 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    font-variant-numeric: tabular-nums;
}
.tn-history-table th {
    color: var(--color-text-tertiary);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.tn-history-empty td {
    text-align: center;
    color: var(--color-text-tertiary);
    font-style: italic;
}
.tn-status-in   { color: #16a34a; }
.tn-status-flat,
.tn-status-sharp { color: #dc2626; }

.tn-privacy-line {
    margin-top: var(--space-md);
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    text-align: center;
}

.tn-shortcuts-list {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 0.4rem 1rem;
    margin: 0;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}
.tn-shortcuts-list dt { font-weight: 600; }
.tn-shortcuts-list kbd {
    display: inline-block;
    padding: 0.1rem 0.4rem;
    background: var(--color-background);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    font-family: ui-monospace, monospace;
    font-size: 0.85rem;
    color: var(--color-text-primary);
}

.tn-footer {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    padding: var(--space-md) 0;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .tn-control-row { justify-content: flex-start; }
    .tn-note-name { font-size: 72px; }
    .tn-note-octave { font-size: 28px; }
    .tn-gauge-wrap { height: 120px; }
}

@media (max-width: 420px) {
    .tn-container { padding-left: var(--space-md); padding-right: var(--space-md); }
    .tn-card { padding: var(--space-md); }
    .tn-header h1 { font-size: 1.85rem; }
    .tn-control-row {
        flex-direction: column;
        align-items: stretch;
        gap: 0.4rem;
    }
    .tn-tuning-row,
    .tn-transpose-row,
    .tn-sens-row {
        width: 100%;
        max-width: none;
    }
    .tn-select { flex: 1 1 auto; width: 100%; }
    .tn-tuning-input { width: 100%; }
    .tn-note-name { font-size: 72px; }
    .tn-display { min-height: 300px; }
}