/* Metronome tool — matches MusEdLab design system */

.metronome-container {
    max-width: 720px;
}

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

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

.metronome-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);
}

/* Tempo display */
.metronome-tempo-card { text-align: center; }
.metronome-tempo-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}
.metronome-bpm-btn {
    flex: 0 0 auto;
    min-width: 56px;
    min-height: 56px;
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1;
    background: var(--color-surface);
    color: var(--color-primary);
    border: 2px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast),
                transform var(--transition-fast);
    user-select: none;
}
.metronome-bpm-btn:hover { background: var(--color-background); border-color: var(--color-primary-light); }
.metronome-bpm-btn:active { transform: translateY(1px); }

.metronome-bpm-display {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    min-width: 0;
}
.metronome-bpm-input {
    font-family: var(--font-display);
    font-size: 4.5rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-text-primary);
    background: transparent;
    border: none;
    width: 5.2ch;
    text-align: center;
    padding: 0;
    -moz-appearance: textfield;
}
.metronome-bpm-input::-webkit-outer-spin-button,
.metronome-bpm-input::-webkit-inner-spin-button {
    -webkit-appearance: none; margin: 0;
}
.metronome-bpm-input:focus { outline: 2px solid var(--color-primary-light); outline-offset: 4px; border-radius: var(--radius-sm); }
.metronome-bpm-unit {
    font-size: 1rem;
    color: var(--color-text-tertiary);
    font-weight: 600;
    letter-spacing: 0.05em;
}

.metronome-marking {
    margin-top: var(--space-sm);
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    min-height: 1.5em;
}

.metronome-countin-indicator {
    margin-top: var(--space-sm);
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
}

/* Visual area */
.metronome-visual-card {
    padding: var(--space-md);
}
.metronome-visual {
    position: relative;
    height: 200px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-background);
    border-radius: var(--radius-md);
    overflow: hidden;
    color: var(--color-primary);
}
.metronome-visual-mode {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
}
.metronome-visual-mode[hidden] { display: none; }

/* Beat Flash */
.metronome-flash-dot {
    width: 96px; height: 96px;
    border-radius: 50%;
    background: var(--color-border);
    transition: background var(--transition-fast), transform var(--transition-fast),
                box-shadow var(--transition-fast);
}
.metronome-flash-dot.flash-beat {
    background: var(--color-primary);
    transform: scale(1.1);
    box-shadow: 0 0 32px rgba(139, 92, 246, 0.45);
}
.metronome-flash-dot.flash-accent {
    background: var(--color-accent);
    transform: scale(1.2);
    box-shadow: 0 0 40px rgba(236, 72, 153, 0.55);
}
.metronome-flash-dot.flash-sub {
    background: var(--color-primary-light);
    transform: scale(1.0);
    box-shadow: 0 0 18px rgba(167, 139, 250, 0.35);
}

/* Pendulum */
.metronome-pendulum svg { width: 100%; height: 100%; max-width: 280px; }

/* Beat Grid */
.metronome-grid-dots {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.6rem;
    max-width: 100%;
}
.metronome-grid-dot {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--color-border);
    transition: background var(--transition-fast), transform var(--transition-fast);
    flex: 0 0 auto;
}
.metronome-grid-dot.is-accent {
    border: 2px solid var(--color-accent-soft);
}
.metronome-grid-dot.is-on {
    background: var(--color-primary);
    transform: scale(1.2);
}
.metronome-grid-dot.is-on.is-accent {
    background: var(--color-accent);
}

.metronome-visual-toggle {
    margin-top: var(--space-md);
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
}
.metronome-vmode-btn {
    min-width: 44px;
    min-height: 44px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), color var(--transition-fast),
                border-color var(--transition-fast);
}
.metronome-vmode-btn:hover { background: var(--color-background); }
.metronome-vmode-btn.is-active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* Start / Stop */
.metronome-start-btn {
    width: 100%;
    min-height: 64px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #fff;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast),
                filter var(--transition-fast);
}
.metronome-start-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.metronome-start-btn:active { transform: translateY(0); }
.metronome-start-btn .ti { font-size: 1.6rem; }
.metronome-start-btn.is-running {
    background: linear-gradient(135deg, #DC2626, #F97316);
}

/* Controls grid */
.metronome-controls-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}
.metronome-control-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}
.metronome-control-label {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 0.95rem;
    flex: 0 0 auto;
}

.metronome-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;
}
.metronome-select:disabled { opacity: 0.5; cursor: not-allowed; }

.metronome-ts-row {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.metronome-ts-slash {
    font-size: 1.5rem;
    color: var(--color-text-tertiary);
    font-weight: 300;
}

.metronome-subdiv-row,
.metronome-voice-row {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    background: var(--color-background);
    padding: 0.25rem;
    border-radius: var(--radius-md);
}
.metronome-subdiv-btn,
.metronome-voice-btn {
    min-width: 56px;
    min-height: 44px;
    padding: 0.4rem 0.85rem;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    transition: background var(--transition-fast), color var(--transition-fast);
}
.metronome-subdiv-btn:hover,
.metronome-voice-btn:hover { color: var(--color-text-primary); }
.metronome-subdiv-btn.is-active,
.metronome-voice-btn.is-active {
    background: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--shadow-xs);
}

.metronome-volume-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex: 1 1 auto;
    min-width: 200px;
    max-width: 320px;
}
.metronome-mute-btn {
    min-width: 44px; min-height: 44px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    display: inline-flex; align-items: center; justify-content: center;
}
.metronome-mute-btn:hover { background: var(--color-background); }
.metronome-mute-btn.is-muted { color: var(--color-error); }
.metronome-volume-slider {
    flex: 1 1 auto;
    accent-color: var(--color-primary);
    height: 4px;
}
.metronome-volume-value {
    font-variant-numeric: tabular-nums;
    color: var(--color-text-tertiary);
    font-size: 0.85rem;
    min-width: 3.5ch;
    text-align: right;
}

.metronome-countin-row {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.metronome-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
    color: var(--color-text-secondary);
    min-height: 44px;
}
.metronome-checkbox input { width: 18px; height: 18px; accent-color: var(--color-primary); }

/* Tap tempo */
.metronome-tap-row {
    justify-content: flex-start;
    gap: var(--space-md);
}
.metronome-tap-btn {
    min-height: 56px;
    min-width: 160px;
    padding: 0.75rem 1.5rem;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background var(--transition-fast), transform var(--transition-fast);
}
.metronome-tap-btn:hover { background: var(--color-primary-dark); }
.metronome-tap-btn:active { transform: scale(0.97); }
.metronome-tap-count {
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
}

/* Gradual + Shortcuts collapsible */
.metronome-gradual-toggle,
.metronome-shortcuts-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;
}
.metronome-gradual-chev {
    transition: transform var(--transition-base);
}
.metronome-gradual-toggle[aria-expanded="true"] .metronome-gradual-chev,
.metronome-shortcuts-toggle[aria-expanded="true"] .metronome-gradual-chev {
    transform: rotate(180deg);
}
.metronome-gradual-panel,
.metronome-shortcuts-panel {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}
.metronome-gradual-enable { margin-bottom: var(--space-sm); }
.metronome-gradual-direction {
    font-family: var(--font-display);
    font-style: italic;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
    font-size: 1.05rem;
}
.metronome-gradual-current {
    margin-bottom: var(--space-md);
    padding: 0.35rem 0.75rem;
    background: var(--color-info-bg);
    color: var(--color-info);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-block;
}
.metronome-gradual-current strong { font-variant-numeric: tabular-nums; }

.metronome-grid-dot.is-sub {
    width: 14px; height: 14px;
    opacity: 0.55;
}
.metronome-grid-dot.is-sub.is-on { opacity: 1; background: var(--color-primary-light); }
@media (max-width: 600px) {
    .metronome-grid-dot.is-sub { width: 10px; height: 10px; }
}
.metronome-gradual-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}
.metronome-gradual-grid label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-weight: 600;
}
.metronome-gradual-grid input,
.metronome-gradual-grid select {
    min-height: 44px;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-text-primary);
}
.metronome-gradual-help {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    line-height: 1.5;
}

.metronome-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);
}
.metronome-shortcuts-list dt { font-weight: 600; }
.metronome-shortcuts-list kbd {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    background: var(--color-background);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    padding: 0.1rem 0.4rem;
    font-size: 0.85rem;
    color: var(--color-text-primary);
}

/* Mobile */
@media (max-width: 600px) {
    .metronome-container { padding: var(--space-md); }
    .metronome-card { padding: var(--space-md); }
    .metronome-bpm-input { font-size: 3.5rem; width: 4.5ch; }
    .metronome-bpm-btn { min-width: 52px; min-height: 52px; font-size: 1.5rem; }
    .metronome-visual { height: 160px; }
    .metronome-flash-dot { width: 80px; height: 80px; }
    .metronome-start-btn { min-height: 56px; font-size: 1.1rem; }
    .metronome-control-row { flex-direction: column; align-items: stretch; }
    .metronome-control-label { font-size: 0.9rem; }
    .metronome-subdiv-row,
    .metronome-voice-row { justify-content: stretch; }
    .metronome-subdiv-btn,
    .metronome-voice-btn { flex: 1 1 auto; }
    .metronome-volume-row { max-width: none; }
    .metronome-tap-row { flex-direction: column; align-items: stretch; }
    .metronome-tap-btn { width: 100%; }
    .metronome-tap-count { text-align: center; }
    .metronome-grid-dot { width: 24px; height: 24px; }
}