@font-face {
    font-family: 'DejaVu Sans';
    src: url('../fonts/DejaVuSans.ttf') format('truetype');
    font-weight: normal;
}
@font-face {
    font-family: 'DejaVu Sans';
    src: url('../fonts/DejaVuSans-Bold.ttf') format('truetype');
    font-weight: bold;
}

/* --- Reset & base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-dark: #1d2021;
    --bg: #282828;
    --bg-light: #32302f;
    --bg-button: #3c3836;
    --bg-hover: #504945;
    --border: #504945;
    --border-dim: #3c3836;
    --text: #ebdbb2;
    --text-dim: #a89984;
    --text-muted: #665c54;
    --accent: #fabd2f;
    --accent-dark: #d79921;
    --blue: #458588;
    --red: #fb4934;
    --purple: #b16286;

    --tab-height: 52px;
    --safe-bottom: env(safe-area-inset-bottom, 0px);

    touch-action: manipulation;
}

html {
    height: 100%;
    overflow-y: scroll;
    scrollbar-width: none;          /* hide scrollbar – Firefox */
    overscroll-behavior: none;
}
html::-webkit-scrollbar { display: none; }  /* hide scrollbar – WebKit/Blink */

body {
    min-height: calc(100% + 1px);   /* 1px overshoot → page is scrollable →
                                       mobile browsers can auto-hide the URL bar */
    font-family: 'DejaVu Sans', system-ui, -apple-system, sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    -webkit-tap-highlight-color: transparent;
    -webkit-text-size-adjust: 100%;
}

/* --- Keyboard focus indicator --- */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}
button:focus:not(:focus-visible) {
    outline: none;
}

/* --- Global play/stop button --- */
#global-play-stop {
    display: block;
    flex-shrink: 0;
    width: 100%;
    padding: 14px;
    background: #2a6e2a;
    color: #fff;
    border: none;
    border-bottom: 1px solid var(--border);
    font-family: inherit;
    font-size: 16px;
    font-weight: bold;
    letter-spacing: 1px;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.1s;
}

#global-play-stop:active {
    background: #3a8a3a;
}

#global-play-stop.playing {
    background: #8b2020;
}

#global-play-stop.playing:active {
    background: #a53030;
}

/* --- Metronome bar --- */
#metronome-bar {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 6px 12px;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
}

#metronome-row-1 {
    display: flex;
    align-items: center;
    gap: 8px;
}


#metronome-tap {
    flex: 0 0 auto;
    padding: 10px 20px;
    background: var(--bg-button);
    color: var(--text);
    border: 2px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.08s, border-color 0.08s;
}

#metronome-tap:active {
    background: var(--bg-hover);
}

#metronome-tap.blink {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
    animation: metronome-pulse var(--beat-ms, 500ms) infinite;
}

@keyframes metronome-pulse {
    0% {
        background: var(--accent);
        border-color: var(--accent);
        color: var(--bg);
        animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
    }
    99% {
        background: color-mix(in srgb, var(--accent) 10%, var(--bg-button));
        border-color: color-mix(in srgb, var(--accent) 10%, transparent);
        color: color-mix(in srgb, var(--bg) 10%, var(--text));
    }
    100% {
        background: var(--accent);
        border-color: var(--accent);
        color: var(--bg);
    }
}

#bpm-label {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    font-size: 10px;
    font-weight: bold;
    color: var(--text-dim);
    white-space: nowrap;
}

#bpm-input {
    width: 52px;
    padding: 6px 4px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
    -moz-appearance: textfield;
}

#bpm-input::-webkit-inner-spin-button,
#bpm-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}



#fullscreen-toggle {
    flex: 0 0 auto;
    padding: 10px 10px;
    background: var(--bg-button);
    color: var(--text-muted);
    border: 1px solid var(--border-dim);
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    line-height: 1;
}

#fullscreen-toggle:active {
    background: var(--bg-hover);
}

#fullscreen-toggle.active {
    color: var(--accent);
    border-color: var(--accent-dark);
}

/* --- Step sequencer --- */
#step-sequencer {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    padding: 2px 0;
    justify-content: center;
}

.seq-step {
    width: 28px;
    height: 28px;
    border: 2px solid var(--border);
    border-radius: 4px;
    background: var(--bg-button);
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.06s, border-color 0.06s;
    flex-shrink: 0;
}

.seq-step.downbeat {
    border-color: var(--accent-dark);
}

.seq-step.enabled {
    background: var(--text);
}

.seq-step.enabled.downbeat {
    background: var(--accent);
}

.seq-step.active {
    border-color: var(--red);
    box-shadow: 0 0 4px var(--red);
}

.seq-row {
    display: flex;
    gap: 3px;
    justify-content: center;
}

/* --- App shell --- */
#app {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg);
}

#panel-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

.panel {
    display: none;
    padding: 12px;
    min-height: 100%;
}

.panel.active {
    display: block;
}

/* --- Bottom tab bar (phone-style) --- */
#tabbar {
    display: flex;
    flex-shrink: 0;
    height: var(--tab-height);
    padding-bottom: var(--safe-bottom);
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
}

.tab {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 11px;
    font-weight: bold;
    letter-spacing: 0.5px;
    cursor: pointer;
    padding: 8px 2px;
    transition: color 0.15s, background 0.15s;
}

.tab:active {
    background: var(--bg-button);
}

.tab.active {
    color: var(--accent);
}

/* --- Config panels (tab settings overlays) --- */
.panel-config {
    display: none;
    padding: 16px 12px;
}

.panel-config.active {
    display: block;
}

.config-section {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-dim);
}

.config-section:last-child {
    border-bottom: none;
}

.config-label {
    font-size: 11px;
    font-weight: bold;
    color: var(--text-dim);
    margin-bottom: 10px;
}

.config-btn-row {
    display: flex;
    gap: 6px;
}

.config-mode-btn {
    flex: 1;
    padding: 14px 6px;
    background: var(--bg-button);
    color: var(--text);
    border: 2px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.1s, border-color 0.1s;
}

.config-mode-btn:active {
    background: var(--bg-hover);
}

.config-mode-btn.active {
    background: var(--accent-dark);
    color: var(--bg);
    border-color: var(--accent);
}

.config-stepper-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 13px;
    font-weight: bold;
    color: var(--text-dim);
}

.config-stepper {
    display: flex;
    align-items: center;
    gap: 4px;
}

.config-stepper .num-stepper {
    width: 44px;
    height: 44px;
    font-size: 18px;
    border-radius: 6px;
}

.config-stepper input[type="number"] {
    width: 56px;
    padding: 10px 4px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 16px;
    font-weight: bold;
    text-align: center;
    -moz-appearance: textfield;
}

.config-stepper input[type="number"]::-webkit-inner-spin-button,
.config-stepper input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.config-unit {
    font-size: 11px;
    font-weight: bold;
    color: var(--text-muted);
    margin-left: 2px;
}

/* --- Panel titles --- */
.panel-title {
    font-size: 12px;
    font-weight: bold;
    color: var(--accent);
    margin-bottom: 8px;
    padding-bottom: 4px;
}

/* --- Section --- */
.chord-section {
    display: flex;
    flex-wrap: wrap;
    padding: 6px 0;
    border-bottom: 1px solid var(--border-dim);
    gap: 6px;
}

.chord-section:last-child {
    border-bottom: none;
}

/* --- Section label --- */
.section-label {
    font-size: 11px;
    color: var(--text-dim);
    margin-bottom: 2px;
    width: 100%;
    flex-shrink: 0;
}

/* --- Buttons --- */
.chord-btn {
    min-width: 60px;
    flex: 1 1 60px;
    max-width: 100px;
    padding: 10px 6px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: background 0.1s;
    user-select: none;
    -webkit-user-select: none;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chord-btn:active {
    background: var(--bg-hover);
}

.chord-btn.staged {
    background: var(--accent-dark);
    color: var(--bg);
    border-color: var(--accent);
}

.chord-btn.selected {
    background: var(--blue);
    color: var(--text);
    border-color: var(--blue);
}

.chord-btn.playing {
    border-color: var(--accent);
    box-shadow: 0 0 6px var(--accent);
    animation: border-breathe var(--beat-ms, 500ms) infinite;
}

@keyframes border-breathe {
    0% {
        border-color: var(--accent);
        animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
    }
    99% { border-color: color-mix(in srgb, var(--accent) 10%, transparent); }
    100% { border-color: var(--accent); }
}

@media (prefers-reduced-motion: reduce) {
    .chord-btn.playing,
    #metronome-tap.blink { animation: none; }
}

.chord-btn.disabled {
    background: var(--bg-light);
    color: var(--text-muted);
    border-color: var(--border-dim);
    cursor: default;
    pointer-events: none;
}

.chord-btn.cursor-btn {
    background: var(--bg-light);
    color: var(--text-muted);
    border-color: var(--border-dim);
}

/* --- Full-width action buttons (Next / Add) --- */
.chord-btn.action-btn {
    flex: 1 1 100%;
    max-width: none;
    min-width: 0;
    padding: 12px;
    font-size: 15px;
}

/* --- Progression picks row --- */
#progression-picks {
    min-height: 50px;
    align-content: flex-start;
}

.progression-pick {
    min-width: 60px;
    flex: 1 1 60px;
    max-width: 100px;
    padding: 10px 6px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: background 0.1s;
}

.progression-pick:active {
    background: var(--bg-hover);
}

/* --- Footer buttons --- */
.progression-footer {
    display: flex;
    gap: 6px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-dim);
}

.prog-footer-btn {
    flex: 1;
    padding: 10px 6px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}


.prog-footer-btn:active {
    background: var(--bg-hover);
}

.prog-footer-btn.reset-pending {
    animation: reset-blink 0.4s ease-in-out infinite;
}

@keyframes reset-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.2; }
}

/* --- Progression root/quality/related buttons (bigger, static size) --- */
.prog-pick-btn {
    min-width: 0;
    flex: 1 1 calc(25% - 5px);
    max-width: calc(25% - 5px);
    padding: 14px 6px;
    font-size: 16px;
}

/* Cap button sections to 4 buttons per row */
.prog-btn-section {
    max-width: 100%;
}

/* --- Mode toggle button (inline in section label) --- */
.mode-toggle {
    display: inline-block;
    padding: 2px 10px;
    margin-left: 8px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 10px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    vertical-align: middle;
}

.mode-toggle.mode-pick {
    padding: 2px 8px;
    margin-left: 4px;
}
.mode-toggle.mode-pick:first-of-type {
    margin-left: 8px;
}

.mode-toggle.mode-delete {
    background: var(--red);
    color: var(--bg);
    border-color: var(--red);
}

.mode-toggle.mode-play {
    background: var(--blue);
    color: var(--text);
    border-color: var(--blue);
}

.mode-toggle.mode-copy {
    background: var(--purple);
    color: var(--text);
    border-color: var(--purple);
}

.mode-toggle.mode-voice {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
}

.mode-toggle.mode-acc {
    background: var(--bg-button);
    color: var(--text);
    border-color: var(--border);
}

/* --- Save/Load UI --- */
.save-row {
    display: flex;
    gap: 6px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-dim);
}

.save-input {
    flex: 1;
    padding: 10px 8px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    outline: none;
}

.save-input:focus {
    border-color: var(--accent);
}

.save-confirm-btn {
    flex: 0 0 auto;
    min-width: 48px;
    background: var(--accent-dark);
    color: var(--bg);
    border-color: var(--accent);
}

.save-cancel-btn {
    flex: 0 0 auto;
    min-width: 48px;
}

.save-item-row {
    display: flex;
    gap: 6px;
    width: 100%;
}

.saved-prog-btn {
    flex: 3 !important;
    max-width: none !important;
}

.saved-prog-btn.saved-prog-btn-3way {
    flex: 3 !important;
    max-width: none !important;
}

.saved-dl-btn {
    flex: 1;
    max-width: none;
    min-width: 0;
    padding: 14px 6px;
    font-size: 18px;
    color: var(--accent);
    border-color: var(--border-dim);
}

.saved-del-btn {
    flex: 0 0 48px;
    width: 48px;
    height: 48px;
    min-width: 0;
    max-width: none;
    padding: 0;
    font-size: 20px;
    line-height: 1;
    color: var(--red);
    border-color: var(--border-dim);
    align-self: center;
}

.upload-row {
    display: flex;
    gap: 6px;
    padding: 8px 0;
}

.upload-prog-btn {
    flex: 1;
    color: var(--accent);
}

.upload-error {
    padding: 6px 8px;
    margin-bottom: 6px;
    border: 1px solid var(--red);
    border-radius: 6px;
    color: var(--red);
    font-size: 12px;
    background: var(--bg-dark);
}

.saved-ts {
    display: inline-block;
    margin-left: 8px;
    font-size: 11px;
    font-weight: normal;
    color: var(--text-muted);
}

/* --- Drag placeholders and ghosts --- */
.chord-btn-placeholder,
.pick-placeholder {
    background: var(--bg-dark) !important;
    color: var(--bg-dark) !important;
    border: 1px dashed var(--text-muted) !important;
    opacity: 0.5;
}

.drag-ghost {
    position: fixed;
    z-index: 1000;
    background: var(--bg-hover);
    color: var(--text);
    border: 2px solid var(--accent);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    text-align: center;
    padding: 10px 6px;
    pointer-events: none;
    opacity: 0.92;
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

/* --- Accidentals row --- */
.accidentals {
    gap: 6px;
}

.accidentals .chord-btn {
    min-width: 48px;
    flex: 1 1 48px;
}

/* --- Color scheme panel --- */
.color-schemes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.scheme-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 8px;
    background: var(--bg-button);
    border: 2px solid var(--border-dim);
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 11px;
    font-weight: bold;
    color: var(--text-dim);
}

.scheme-btn.active {
    border-color: var(--accent);
    color: var(--accent);
}

.scheme-preview {
    display: flex;
    gap: 3px;
    flex-wrap: nowrap;
}

.scheme-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.scheme-dot.scheme-bg {
    border: 1px solid var(--border);
}

.scheme-name {
    text-align: center;
    line-height: 1.2;
    word-break: break-word;
}

/* --- Color config overlay --- */
.color-config-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.color-config-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-dim);
}

.color-config-group:last-of-type {
    border-bottom: none;
    padding-bottom: 0;
}

.color-config-group-title {
    font-size: 11px;
    font-weight: bold;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2px;
}

.color-config-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 4px 0;
    cursor: pointer;
}

.color-config-row-label {
    font-size: 13px;
    color: var(--text);
    flex: 1 1 auto;
    min-width: 0;
}

.color-config-row input[type="color"] {
    appearance: none;
    -webkit-appearance: none;
    width: 44px;
    height: 28px;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    flex: 0 0 auto;
}

.color-config-row input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-config-row input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 3px;
}

.color-config-row input[type="color"]::-moz-color-swatch {
    border: none;
    border-radius: 3px;
}

.color-reset-btn {
    margin-top: 8px;
    padding: 10px 12px;
    background: var(--bg-button);
    border: 2px solid var(--border-dim);
    border-radius: 8px;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 11px;
    font-weight: bold;
    letter-spacing: 0.05em;
    cursor: pointer;
}

.color-reset-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border);
    color: var(--text);
}

.color-reset-btn:active {
    border-color: var(--accent);
    color: var(--accent);
}

/* --- Canvas panels (spectrum/waveform) --- */
.render-canvas {
    width: 100%;
    height: 300px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 6px;
    display: block;
}

/* --- MIDI controls --- */
#midi-row {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
}

.hidden {
    display: none !important;
}

.midi-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    font-weight: bold;
    color: var(--text-dim);
    white-space: nowrap;
}

#midi-out-select,
#midi-in-select {
    padding: 6px 4px;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 11px;
    font-weight: bold;
    max-width: 140px;
}

/* Disabled state for external sync */
#metronome-tap.sync-locked {
    opacity: 0.4;
    pointer-events: none;
}

#bpm-label.sync-locked {
    opacity: 0.6;
    pointer-events: none;
}

/* --- Responsive: larger screens --- */
@media (min-width: 601px) {
    #app {
        max-width: 900px;
    }

    .chord-btn {
        min-width: 72px;
        flex: 0 1 72px;
    }

    .prog-pick-btn {
        min-width: 0;
        flex: 1 1 calc(25% - 5px);
        max-width: calc(25% - 5px);
        padding: 16px 6px;
        font-size: 17px;
    }

    .prog-btn-section {
        max-width: 100%;
    }

    .progression-pick {
        min-width: 72px;
        flex: 0 1 72px;
    }

    .tab {
        font-size: 13px;
    }
}

/* --- Landscape tweaks --- */
@media (orientation: landscape) {
    #app {
        max-width: 50%;
    }
}

@media (orientation: landscape) and (max-height: 500px) {
    :root {
        --tab-height: 40px;
    }

    .panel {
        padding: 8px;
    }

    .chord-btn, .progression-pick, .prog-footer-btn {
        padding: 6px 4px;
        font-size: 12px;
    }

    .prog-pick-btn {
        min-width: 0;
        flex: 1 1 calc(25% - 5px);
        max-width: calc(25% - 5px);
        padding: 8px 4px;
        font-size: 13px;
    }

    .prog-btn-section {
        max-width: 100%;
    }

    .render-canvas {
        height: 200px;
    }
}

/* --- VOICE popup --- */
.voice-popup {
    margin: 8px 0;
    padding: 10px 12px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.voice-popup-title {
    font-size: 13px;
    font-weight: bold;
    color: var(--text-dim);
    padding-bottom: 4px;
    border-bottom: 1px solid var(--border-dim);
}

.voice-note-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 2px 0;
}

.voice-note-name {
    flex: 1;
    font-size: 16px;
    font-weight: bold;
    color: var(--text);
}

.voice-oct-btn {
    width: 44px;
    height: 44px;
    padding: 0;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 50%;
    font-family: inherit;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.1s;
}

.voice-oct-btn:active {
    background: var(--bg-hover);
}

.voice-popup-actions {
    display: flex;
    gap: 6px;
    margin-top: 4px;
}

.voice-popup-actions .prog-footer-btn {
    flex: 1;
}

/* --- STEP panel (chromatic step sequencer) --- */
.step-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 11px;
    color: var(--text-dim);
}

.step-clear-btn {
    margin-left: auto;
}

.step-oct-label {
    display: flex;
    align-items: center;
    gap: 4px;
    letter-spacing: 0.05em;
}

.step-oct-label input {
    width: 3.5ch;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 2px 4px;
    font-family: inherit;
    font-size: 12px;
    text-align: center;
}

.step-grid {
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
}

.step-grid .grid-row {
    display: flex;
    gap: 2px;
    align-items: center;
    flex-wrap: nowrap;
}

.step-grid .grid-row.in-chord {
    background: var(--bg-light);
    border-radius: 3px;
}

.step-grid .note-label {
    width: 32px;
    flex-shrink: 0;
    font-size: 10px;
    color: var(--text-dim);
    text-align: right;
    padding-right: 4px;
    font-variant-numeric: tabular-nums;
}

.step-grid .grid-cell {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border: 1px solid var(--border);
    border-radius: 2px;
    background: var(--bg-button);
    cursor: pointer;
    padding: 0;
    transition: background 0.06s, border-color 0.06s;
}

@media (min-width: 601px) {
    .step-grid .grid-cell {
        width: 32px;
        height: 32px;
    }
}

.step-grid .grid-cell.downbeat {
    border-color: var(--accent-dark);
}

.step-grid .grid-cell.enabled {
    background: var(--text);
}

.step-grid .grid-cell.enabled.downbeat {
    background: var(--accent);
}

.step-grid .grid-cell.active {
    border-color: var(--red);
    box-shadow: 0 0 4px var(--red);
}

/* --- Commit-gesture hint under section labels --- */
.section-hint {
    width: 100%;
    font-size: 10px;
    font-weight: normal;
    color: var(--text-muted);
    margin-top: -4px;
    margin-bottom: 4px;
    letter-spacing: 0.02em;
}

/* --- Long-press commit flash (ghost overlay, detached from rebuild) --- */
.longpress-flash {
    position: fixed;
    pointer-events: none;
    z-index: 999;
    border: 2px solid var(--accent);
    border-radius: 6px;
    background: rgba(250, 189, 47, 0.28);
    animation: longpress-flash 600ms ease-out forwards;
}

@keyframes longpress-flash {
    0%   { opacity: 1; transform: scale(1); }
    100% { opacity: 0; transform: scale(1.18); }
}

/* --- Numeric steppers for metronome inputs --- */
.num-stepper {
    flex: 0 0 auto;
    width: 28px;
    height: 32px;
    padding: 0;
    background: var(--bg-button);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    line-height: 1;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
}

.num-stepper:active {
    background: var(--bg-hover);
}


/* --- Save-success flash on the saved-progression row --- */
.saved-prog-btn.just-saved {
    animation: just-saved 640ms ease-out;
}

@keyframes just-saved {
    0%   { border-color: var(--accent); box-shadow: 0 0 8px var(--accent); }
    100% { border-color: var(--border); box-shadow: 0 0 0 transparent; }
}

/* --- Border accent on the most recently loaded progression --- */
.saved-prog-btn.last-loaded {
    border-color: var(--accent);
    box-shadow: inset 0 0 0 1px var(--accent);
}

/* --- Tutorial overlay --- */
.tutorial-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 1500;
    opacity: 0;
    transition: opacity 0.2s ease;
}
.tutorial-backdrop.visible { opacity: 1; }

.tutorial-spotlight {
    position: relative;
    z-index: 1600;
    outline: 3px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
    animation: tutorial-pulse 1.6s ease-in-out infinite;
}
@keyframes tutorial-pulse {
    0%, 100% { outline-color: var(--accent); }
    50%      { outline-color: var(--accent-dark); }
}

.tutorial-tip {
    position: fixed;
    z-index: 1700;
    max-width: 280px;
    width: calc(100vw - 24px);
    background: var(--bg-light);
    color: var(--text);
    border: 1px solid var(--accent);
    border-radius: 6px;
    padding: 10px 12px 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.7);
    font-size: 13px;
    line-height: 1.4;
    opacity: 0;
    transition: opacity 0.2s ease;
}
.tutorial-tip.visible { opacity: 1; }

.tutorial-tip-step {
    font-size: 10px;
    font-weight: bold;
    color: var(--accent);
    letter-spacing: 0.04em;
    margin-bottom: 4px;
}
.tutorial-tip-msg {
    margin-bottom: 8px;
}
.tutorial-tip-skip {
    display: block;
    margin-left: auto;
    font-size: 11px;
    color: var(--text-muted);
    background: none;
    border: none;
    padding: 2px 4px;
    cursor: pointer;
    text-decoration: underline;
    font-family: inherit;
}
.tutorial-tip-skip:hover { color: var(--text); }

/* Arrow on tip, pointing toward target */
.tutorial-tip::before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border: 8px solid transparent;
    left: var(--arrow-x, 50%);
    transform: translateX(-50%);
}
.tutorial-tip.tip-above::before {
    bottom: -16px;
    border-top-color: var(--accent);
}
.tutorial-tip.tip-below::before {
    top: -16px;
    border-bottom-color: var(--accent);
}

/* Help (?) button in tabbar, sized as a narrow companion to tabs */
#help-btn.tab-help {
    flex: 0 0 28px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    padding: 8px 2px;
    transition: color 0.15s;
}
#help-btn.tab-help:hover {
    color: var(--accent);
}
#help-btn.tab-help:active {
    background: var(--bg-button);
}