/* ══════════════════════════════════════════════════════════════
   Play Sections — Digital Piano & Drum Pads
   ══════════════════════════════════════════════════════════════ */

/* ── Shared Controls Bar ── */
.play-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.play-controls .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.play-controls-spacer {
    flex: 1;
}

/* ── Inline Volume Slider ── */
.play-volume {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--text-dim);
    cursor: pointer;
}
.play-volume svg {
    flex-shrink: 0;
    opacity: 0.7;
}
.play-volume input[type="range"] {
    width: 70px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}
.play-volume input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    cursor: pointer;
}
.play-volume input[type="range"]::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    cursor: pointer;
}

.play-control-group {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.play-control-group select,
.play-control-group input[type="number"] {
    padding: 0.3rem 0.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.85rem;
}

.play-control-group input[type="number"] {
    width: 4rem;
    text-align: center;
    font-family: var(--font-mono);
}

/* Recording indicator */
.play-rec-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-muted);
    margin-right: 2px;
    vertical-align: middle;
    transition: background 0.2s;
}

.play-rec-dot.recording {
    background: #e74c3c;
    animation: rec-pulse 0.8s ease-in-out infinite;
}

@keyframes rec-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.play-loop-indicator {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--accent);
    font-weight: 600;
    display: none;
}

.play-loop-indicator.active {
    display: inline;
}

/* ══════════════════════════════════════════════════════════════
   DIGITAL PIANO
   ══════════════════════════════════════════════════════════════ */

.piano-play-workspace {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Keyboard Container */
.pp-keyboard-wrapper {
    position: relative;
    overflow-x: auto;
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 520px;
    justify-content: flex-end;
}

/* Axolotl background mascot */
.pp-keyboard-wrapper::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../images/pianoDark.png') no-repeat center 35%;
    background-size: auto 90%;
    opacity: 0.06;
    pointer-events: none;
}

html.light-theme .pp-keyboard-wrapper::after {
    background-image: url('../images/pianoWhite.png');
}

.pp-keyboard {
    position: relative;
    display: flex;
    height: 200px;
    user-select: none;
    touch-action: none;
}

.pp-key {
    position: relative;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    padding-bottom: 10px;
    font-family: var(--font-mono);
    transition: all 0.08s ease;
}

.pp-white {
    width: 52px;
    height: 200px;
    background: linear-gradient(180deg, #fafafa 0%, #e8e8e8 100%);
    border: 1px solid #bbb;
    border-radius: 0 0 6px 6px;
    z-index: 1;
}

.pp-white:hover {
    background: linear-gradient(180deg, #fff 0%, #f0f0f0 100%);
}

.pp-white.pp-pressed {
    background: linear-gradient(180deg, var(--accent-light) 0%, var(--accent) 100%);
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 2px 16px rgba(108, 99, 255, 0.5);
    transform: translateY(2px);
}

.pp-black {
    width: 34px;
    height: 130px;
    background: linear-gradient(180deg, #3a3a3a 0%, #111 100%);
    border: 1px solid #000;
    border-radius: 0 0 5px 5px;
    margin-left: -17px;
    margin-right: -17px;
    z-index: 2;
    color: #888;
}

.pp-black:hover {
    background: linear-gradient(180deg, #4a4a4a 0%, #222 100%);
}

.pp-black.pp-pressed {
    background: linear-gradient(180deg, var(--accent) 0%, #4a42cc 100%);
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 2px 12px rgba(108, 99, 255, 0.6);
    transform: translateY(2px);
}

.pp-label {
    font-size: 0.7rem;
    font-weight: 600;
    opacity: 0.5;
    pointer-events: none;
}

.pp-white .pp-label { color: #555; }
.pp-black .pp-label { color: #aaa; }
.pp-pressed .pp-label { color: #fff; opacity: 1; }

.pp-shortcut {
    position: absolute;
    top: 8px;
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.4;
    pointer-events: none;
}

.pp-black .pp-shortcut {
    top: 6px;
    color: #bbb;
}

/* Keyboard hint */
.pp-hint {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 1rem;
    position: relative;
    z-index: 1;
}

.pp-hint kbd {
    display: inline-block;
    padding: 0.1rem 0.35rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text);
}

/* Sound selector pills */
.pp-sounds {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.pp-sound-btn {
    padding: 0.35rem 0.85rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
}

.pp-sound-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.pp-sound-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* ══════════════════════════════════════════════════════════════
   DRUM PADS
   ══════════════════════════════════════════════════════════════ */

.drums-play-workspace {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Pad Grid */
.pd-grid-wrapper {
    position: relative;
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

/* Axolotl background mascot */
.pd-grid-wrapper::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../images/drumsDark.png') no-repeat center center;
    background-size: contain;
    opacity: 0.06;
    pointer-events: none;
}

html.light-theme .pd-grid-wrapper::after {
    background-image: url('../images/drumsWhite.png');
}

.pd-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
    max-width: 600px;
    margin: 0 auto;
}

.pd-pad {
    aspect-ratio: 1;
    border-radius: var(--radius);
    border: 2px solid var(--border);
    background: var(--bg);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    user-select: none;
    touch-action: manipulation;
    transition: transform 0.06s, box-shadow 0.06s, border-color 0.1s;
    min-height: 90px;
}

.pd-pad:hover {
    border-color: var(--text-muted);
    transform: scale(1.02);
}

.pd-pad:active,
.pd-pad.pd-hit {
    transform: scale(0.95);
    box-shadow: inset 0 2px 8px rgba(0,0,0,0.3);
}

.pd-pad.pd-hit {
    border-color: var(--pad-color, var(--accent));
    box-shadow: 0 0 20px color-mix(in srgb, var(--pad-color, var(--accent)) 40%, transparent);
}

.pd-pad-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    pointer-events: none;
}

.pd-pad-key {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-muted);
    opacity: 0.5;
    pointer-events: none;
    padding: 0.1rem 0.3rem;
    background: var(--surface);
    border-radius: 3px;
}

.pd-pad-color-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    pointer-events: none;
}

/* Kit info */
.pd-hint {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .pp-keyboard-wrapper {
        min-height: unset;
        padding: 0.75rem;
    }
    .pp-keyboard-wrapper::after {
        display: none;
    }
    .pp-keyboard { height: 160px; }
    .pp-white { width: 38px; height: 160px; }
    .pp-black { width: 26px; height: 100px; margin-left: -13px; margin-right: -13px; }
    .pp-shortcut { display: none; }

    .pd-grid { grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
    .pd-pad { min-height: 80px; }

    .play-controls { gap: 0.5rem; padding: 0.75rem; }

    .pg-string-line { min-width: 200px; }
    .pg-string-key { display: none; }

    .pb-fretboard { font-size: 0.6rem; }
    .pb-fret { min-width: 36px; padding: 0.4rem 0.2rem; }
    .pb-fret-num { min-width: 36px; }
}

@media (max-width: 480px) {
    .pp-white { width: 28px; }
    .pp-black { width: 20px; margin-left: -10px; margin-right: -10px; }
}

/* ══════════════════════════════════════════════════════════════
   PLAYABLE GUITAR
   ══════════════════════════════════════════════════════════════ */

.guitar-play-workspace {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Chord selector */
.pg-chord-selector {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.pg-chord-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
}

.pg-chord-group-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    min-width: 50px;
}

.pg-chord-btn {
    padding: 0.35rem 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-muted);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font);
}

.pg-chord-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.pg-chord-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Strum area with strings */
.pg-strum-area {
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    position: relative;
}

.pg-strum-btn-row {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.pg-strum-btn {
    padding: 0.5rem 1.5rem;
    background: var(--accent);
    border: none;
    border-radius: var(--radius);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font);
}

.pg-strum-btn:hover {
    filter: brightness(1.15);
    transform: translateY(-1px);
}

.pg-strum-btn:active {
    transform: translateY(1px);
}

.pg-strings {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: 650px;
    margin: 0 auto;
}

.pg-string {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    padding: 0.4rem 0.5rem;
    border-radius: 6px;
    transition: background 0.1s;
    user-select: none;
}

.pg-string:hover {
    background: var(--bg-hover);
}

.pg-string.pg-plucked {
    background: rgba(108, 99, 255, 0.12);
}

.pg-string-label {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text);
    min-width: 1.5rem;
    text-align: center;
}

.pg-fret-label {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--accent);
    min-width: 1.5rem;
    text-align: center;
}

.pg-fret-label.pg-muted {
    color: var(--text-muted);
    opacity: 0.5;
}

.pg-string-line {
    flex: 1;
    background: linear-gradient(90deg, var(--text-muted), var(--border));
    border-radius: 1px;
    transition: box-shadow 0.15s;
    min-width: 300px;
}

.pg-plucked .pg-string-line {
    box-shadow: 0 0 10px var(--accent), 0 0 4px var(--accent);
    background: var(--accent);
}

.pg-string-key {
    font-size: 0.6rem;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-muted);
    opacity: 0.4;
    min-width: 1.2rem;
    text-align: center;
}

/* Chord name display */
.pg-chord-display {
    text-align: center;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent);
    padding: 0.5rem 0;
    font-family: var(--font-mono);
}

/* Tone selector pills */
.pg-tones {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.pg-tone-btn {
    padding: 0.35rem 0.85rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font);
}

.pg-tone-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.pg-tone-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Guitar hint */
.pg-hint {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: -0.5rem;
}

.pg-hint kbd {
    display: inline-block;
    padding: 0.1rem 0.35rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text);
}

/* ══════════════════════════════════════════════════════════════
   PLAYABLE BASS
   ══════════════════════════════════════════════════════════════ */

.bass-play-workspace {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Fretboard */
.pb-fretboard-wrapper {
    overflow-x: auto;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #141418 0%, #1c1c24 40%, #18181e 100%);
    border: 2px solid #2a2a3a;
    border-radius: 12px;
    box-shadow: inset 0 2px 12px rgba(0,0,0,0.5), 0 4px 16px rgba(0,0,0,0.3);
}

.pb-fretboard {
    display: flex;
    flex-direction: column;
    gap: 0;
    min-width: fit-content;
    margin: 0 auto;
}

.pb-fret-numbers {
    display: flex;
    align-items: center;
    gap: 0;
}

.pb-fret-num {
    min-width: 48px;
    text-align: center;
    font-size: 0.6rem;
    font-family: var(--font-mono);
    font-weight: 600;
    color: #707088;
    padding: 0.2rem 0;
}

.pb-string-row {
    display: flex;
    align-items: center;
    gap: 0;
}

.pb-string-name {
    min-width: 28px;
    text-align: center;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.85rem;
    color: #9090b0;
}

.pb-fret {
    min-width: 48px;
    padding: 0.6rem 0.3rem;
    text-align: center;
    font-size: 0.68rem;
    font-family: var(--font-mono);
    font-weight: 600;
    color: #707088;
    background: linear-gradient(180deg, #22222c 0%, #1a1a22 100%);
    border: none;
    border-right: 2px solid #3a3a4a;
    cursor: pointer;
    user-select: none;
    touch-action: manipulation;
    transition: all 0.1s;
    position: relative;
}

/* Nut (open string position) */
.pb-fret[data-fret="0"] {
    background: linear-gradient(180deg, #d0d0e0 0%, #b8b8cc 100%);
    border-right: 4px solid #9898b0;
    color: #3a3a50;
}

/* String wire through each fret */
.pb-fret::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: var(--string-thickness, 2px);
    background: linear-gradient(180deg, #888898, #606070);
    opacity: 0.5;
    transform: translateY(-50%);
    pointer-events: none;
    border-radius: 1px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.pb-fret[data-fret="0"]::after {
    opacity: 0.4;
}

.pb-fret:hover {
    background: linear-gradient(180deg, #2e2e3c 0%, #26263a 100%);
    color: #b0b0cc;
}

.pb-fret[data-fret="0"]:hover {
    background: linear-gradient(180deg, #e0e0ee 0%, #c8c8dc 100%);
    color: #2a2a40;
}

.pb-fret.pb-hit {
    background: radial-gradient(circle, rgba(108, 99, 255, 0.7) 30%, transparent 70%), linear-gradient(180deg, #22222c 0%, #1a1a22 100%);
    color: #fff;
    text-shadow: 0 0 6px rgba(108, 99, 255, 0.8);
    box-shadow: 0 0 12px rgba(108, 99, 255, 0.4);
}

/* Scale note highlighting on bass fretboard */
.pb-fret.pb-scale {
    background: linear-gradient(180deg, rgba(46, 125, 50, 0.3), rgba(46, 125, 50, 0.15)), linear-gradient(180deg, #22222c, #1a1a22);
    color: #6dbb72;
}
.pb-fret.pb-root {
    background: linear-gradient(180deg, rgba(46, 125, 50, 0.5), rgba(46, 125, 50, 0.3)), linear-gradient(180deg, #22222c, #1a1a22);
    color: #a5e6a9;
    font-weight: 700;
}
.pb-fret.pb-hit.pb-scale, .pb-fret.pb-hit.pb-root {
    background: radial-gradient(circle, rgba(108, 99, 255, 0.7) 30%, transparent 70%), linear-gradient(180deg, #22222c, #1a1a22);
    color: #fff;
}

/* Bass tone selector pills */
.pb-tones {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.pb-tone-btn {
    padding: 0.35rem 0.85rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font);
}

.pb-tone-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.pb-tone-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Bass hint */
.pb-hint {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: -0.5rem;
}

.pb-hint kbd {
    display: inline-block;
    padding: 0.1rem 0.35rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text);
}

/* Fret dot markers */
.pb-fret[data-fret="3"]::before,
.pb-fret[data-fret="5"]::before,
.pb-fret[data-fret="7"]::before,
.pb-fret[data-fret="9"]::before {
    content: '';
    position: absolute;
    bottom: 3px;
    left: 50%;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #5a5a70;
    opacity: 0.4;
    transform: translateX(-50%);
    pointer-events: none;
}

/* ══════════════════════════════════════════════════════════════
   THEREMIN
   ══════════════════════════════════════════════════════════════ */

.theremin-play-workspace {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* X/Y Pad */
.pt-pad-wrapper {
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.pt-pad {
    position: relative;
    width: 100%;
    height: 520px;
    background: radial-gradient(ellipse at 50% 50%, rgba(108, 99, 255, 0.06) 0%, transparent 70%),
                linear-gradient(180deg, var(--bg) 0%, var(--surface) 100%);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: crosshair;
    touch-action: none;
    user-select: none;
    overflow: hidden;
}

/* Grid lines */
.pt-pad::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(90deg, var(--border) 0, var(--border) 1px, transparent 1px, transparent 20%)
        ,repeating-linear-gradient(0deg, var(--border) 0, var(--border) 1px, transparent 1px, transparent 25%);
    opacity: 0.3;
    pointer-events: none;
}

/* Axolotl background mascot */
.pt-pad::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../images/thereminDark.png') no-repeat center center;
    background-size: contain;
    opacity: 0.06;
    pointer-events: none;
}

html.light-theme .pt-pad::after {
    background-image: url('../images/thereminWhite.png');
}

/* Axis labels */
.pt-axis-x {
    display: flex;
    justify-content: space-between;
    padding: 0.25rem 0.5rem 0;
    font-size: 0.65rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    opacity: 0.6;
}

.pt-axis-y {
    position: absolute;
    top: 0;
    bottom: 0;
    left: -2.2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 0.5rem 0;
    font-size: 0.6rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    opacity: 0.6;
    writing-mode: vertical-lr;
    text-align: center;
}

/* Cursor dot */
.pt-cursor {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 20px var(--accent), 0 0 40px rgba(108, 99, 255, 0.3);
    transform: translate(-50%, -50%);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.1s;
}

.pt-cursor.active {
    opacity: 1;
}

/* Crosshair lines */
.pt-crosshair-x,
.pt-crosshair-y {
    position: absolute;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.1s;
}

.pt-crosshair-x {
    width: 100%;
    height: 1px;
    background: var(--accent);
    opacity: 0;
    left: 0;
}

.pt-crosshair-y {
    height: 100%;
    width: 1px;
    background: var(--accent);
    opacity: 0;
    top: 0;
}

.pt-cursor.active ~ .pt-crosshair-x,
.pt-cursor.active ~ .pt-crosshair-y {
    opacity: 0.15;
}

/* Note display */
.pt-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 0.75rem 0;
}

.pt-note {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--accent);
    min-width: 4rem;
    text-align: center;
}

.pt-freq {
    font-size: 0.85rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    min-width: 5rem;
}

/* Wave & scale selectors */
.pt-waves,
.pt-scales {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.pt-wave-btn,
.pt-scale-btn {
    padding: 0.35rem 0.85rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    font-family: var(--font);
}

.pt-wave-btn:hover,
.pt-scale-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.pt-wave-btn.active,
.pt-scale-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Hint */
.pt-hint {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: -0.5rem;
}

@media (max-width: 768px) {
    .pt-pad { height: 250px; }
}