/* ======================= METRONOME FLOATING WIDGET ======================= */

.metronome-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: color-mix(in srgb, var(--accent) 10%, var(--surface));
    border: 1.5px solid color-mix(in srgb, var(--accent) 45%, var(--border));
    color: var(--accent);
    font-size: 19px;
    cursor: pointer;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 18%, transparent);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.metronome-fab:hover {
    transform: translateY(-2px);
    background: color-mix(in srgb, var(--accent) 10%, var(--surface));
    box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 28%, transparent);
    border-color: color-mix(in srgb, var(--accent) 70%, transparent);
}

.metronome-fab:active {
    transform: scale(0.95);
}

.metronome-fab.panel-open {
    opacity: 0;
    pointer-events: none;
}

@keyframes metronome-flash {
    0%   { background: color-mix(in srgb, var(--accent) 50%, var(--surface)); }
    100% { background: color-mix(in srgb, var(--accent) 10%, var(--surface)); }
}

.metronome-fab.beat-flash {
    animation: metronome-flash 0.3s ease-out forwards;
}

/* ======================= METRONOME PANEL ======================= */

.metronome-panel {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 300px;
    max-height: calc(100dvh - 48px);
    overflow-y: auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow-lg);
    z-index: 60;
    transform: translateY(12px) scale(0.97);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
    opacity 0.2s ease;
    transform-origin: bottom right;
}

.metronome-panel.active {
    transform: translateY(0) scale(1);
    opacity: 1;
    pointer-events: all;
}

/* ======================= PANEL HEADER ======================= */

.metronome-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px 12px;
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--surface);
}

.metronome-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.metronome-close {
    width: 26px;
    height: 26px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    transition: all 0.15s ease;
}

.metronome-close:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

/* ======================= VISUAL BEAT DISPLAY ======================= */

.metronome-visual {
    padding: 18px 16px 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}
/* Beat dots row */
.beat-dots {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    height: 36px;
}

.beat-dot {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 0;
    outline: none;
    overflow: hidden;
    position: relative;
    flex-shrink: 0;
    transition: opacity 0.12s ease;
}

/* Full state */
.beat-dot.state-full {
    background: color-mix(in srgb, var(--accent) 80%, transparent);
}

/* Half state — top has empty color, bottom half filled with accent */
.beat-dot.state-half {
    background: color-mix(in srgb, var(--text-tertiary) 10%, transparent);
}

.beat-dot.state-half::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 50%;
    background: color-mix(in srgb, var(--accent) 80%, transparent);
}

/* Empty state */
.beat-dot.state-empty {
    background: color-mix(in srgb, var(--text-tertiary) 20%, transparent);
    opacity: 0.5;
}

/* Active — playing right now */
.beat-dot.state-full.active {
    background: var(--accent);
    transform: scale(1.04);
}

.beat-dot.state-half.active {
    background: color-mix(in srgb, var(--text-tertiary) 10%, transparent);
    transform: scale(1.04);
}

.beat-dot.state-half.active::after {
    background: var(--accent);
}

.beat-dot.state-empty.active {
    background: color-mix(in srgb, var(--text-tertiary) 25%, transparent);
    opacity: 0.6;
    transform: scale(1.04);
}

.beat-dot:hover {
    opacity: 0.75;
}

/* BPM display */
.bpm-display {
    display: flex;
    align-items: baseline;
    gap: 5px;
}

.bpm-number {
    font-size: 52px;
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-mono);
    line-height: 1;
    letter-spacing: -2px;
    min-width: 90px;
    text-align: center;
    transition: color 0.15s ease;
}

.bpm-number.playing {
    color: var(--accent);
}

.bpm-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding-bottom: 4px;
}

/* Tempo name badge */
.tempo-name {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    height: 14px;
    transition: color 0.2s ease;
}

/* ======================= BPM SLIDER ======================= */

.metronome-slider-row {
    padding: 0 16px 4px;
    display: grid;
    grid-template-columns: 28px 1fr 28px;
    align-items: center;
    gap: 10px;
}

.metronome-bpm-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border);
    background: var(--surface-hover);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    transition: all 0.15s ease;
    flex-shrink: 0;
    font-family: monospace;
    font-weight: 700;
    user-select: none;
}

.metronome-bpm-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.metronome-bpm-btn:active {
    transform: scale(0.92);
}

.metronome-slider {
    width: 100%;
    min-width: 0;
    height: 5px;
    border-radius: 3px;
    background: var(--border-light);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.metronome-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    transition: transform 0.15s ease;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.metronome-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.metronome-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
}

/* ======================= CONTROLS ROW ======================= */

.metronome-controls {
    padding: 10px 16px 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Time signature row */
.metronome-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.metronome-row-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    flex-shrink: 0;
    width: 60px;
}

.metronome-chips {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.metronome-chip {
    padding: 4px 10px;
    border: 1.5px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
    line-height: 1.4;
}

.metronome-chip:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.metronome-chip.active {
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    border-color: color-mix(in srgb, var(--accent) 55%, transparent);
    color: var(--accent);
}

/* Sound select */
.metronome-select {
    flex: 1;
    padding: 5px 10px;
    background: var(--surface-hover);
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 12px;
    font-family: var(--font-sans);
    color: var(--text-primary);
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 12 12'%3E%3Cpath fill='%2380868b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 10px;
    padding-right: 24px;
    transition: border-color 0.15s ease;
}

.metronome-select:focus {
    outline: none;
    border-color: var(--accent);
}

.metronome-select option {
    background: var(--surface);
    color: var(--text-primary);
}

/* Volume row */
.metronome-volume-slider {
    flex: 1;
    height: 4px;
    border-radius: 2px;
    background: var(--border-light);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.metronome-volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s ease;
}

.metronome-volume-slider::-webkit-slider-thumb:hover {
    background: var(--accent);
}

.metronome-volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--text-secondary);
    cursor: pointer;
    border: none;
}

/* Divider */
.metronome-divider {
    height: 1px;
    background: var(--border-light);
    margin: 2px 0;
}

/* ======================= PLAY BUTTON ======================= */

.metronome-play-row {
    padding: 0 16px 16px;
    display: flex;
    gap: 8px;
}

.metronome-play-btn {
    flex: 1;
    height: 42px;
    border: 1.5px solid color-mix(in srgb, var(--accent) 55%, transparent);
    border-radius: 12px;
    background: color-mix(in srgb, var(--accent) 16%, transparent);
    color: var(--accent);
    font-size: 14px;
    font-weight: 700;
    font-family: var(--font-sans);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
    letter-spacing: 0.02em;
}

.metronome-play-btn:hover {
    background: color-mix(in srgb, var(--accent) 24%, transparent);
    border-color: color-mix(in srgb, var(--accent) 75%, transparent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px color-mix(in srgb, var(--accent) 20%, transparent);
}

.metronome-play-btn:active {
    transform: scale(0.97);
}

.metronome-play-btn.playing {
    background: var(--surface-hover);
    color: var(--text-primary);
    border: 1.5px solid var(--border);
    box-shadow: none;
}

.metronome-play-btn.playing:hover {
    border-color: var(--text-secondary);
    background: var(--surface-hover);
    transform: translateY(-1px);
}

/* Tap tempo button */
.metronome-tap-btn {
    height: 42px;
    padding: 0 14px;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.metronome-tap-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.metronome-tap-btn:active {
    transform: scale(0.95);
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    border-color: var(--accent);
    color: var(--accent);
}

/* ======================= NOTICE ======================= */

.metronome-notice {
    padding: 6px 16px 2px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    text-align: center;
    gap: 6px;
    margin-bottom: 3px;
    line-height: 1.4;
}


/* ======================= AUTO-LOAD TOGGLE ROW ======================= */

.metronome-autoload-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px 12px;
    gap: 10px;
}

.metronome-autoload-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    cursor: pointer;
    user-select: none;
}

.metronome-autoload-label i {
    font-size: 10px;
    opacity: 0.75;
}

.metronome-autoload-row .toggle-switch {
    flex-shrink: 0;
}

@media (max-width: 600px) {
    .metronome-fab {
        display: none !important;
    }

    .metronome-panel {
        position: fixed;
        bottom: auto;
        top: 50%;
        left: 50%;
        right: auto;
        width: min(340px, 90vw);
        z-index: 499;
        transform: translate(-50%, -50%) scale(0.95);
        opacity: 0;
        pointer-events: none;
        transform-origin: center center;
        transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
                    opacity 0.2s ease;
    }

    .metronome-panel.active {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
        pointer-events: all;
    }
}