/* FUI: スプラッシュと統一（GAU Root は英字用） */
@font-face {
    font-family: 'GAU Root';
    src: url('../font/GAU_Root_Nomal.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

:root {
    --bg-color: #fafafa;
    --glass-bg: rgba(255, 255, 255, 0.97);
    --glass-border: rgba(0, 0, 0, 0.08);
    --accent-color: #4b5563;
    --accent-glow: rgba(75, 85, 99, 0.2);
    --text-primary: #4b5563;
    --text-secondary: #6b7280;
    --text-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
    --text-shadow-strong: 0 2px 4px rgba(0, 0, 0, 0.12);
    --danger: #dc2626;
    --fui-grid-line: rgba(0, 0, 0, 0.04);
    --fui-border: rgba(0, 0, 0, 0.08);
}

/* 英字ラベル用 FUI フォント（スプラッシュと統一） */
.mt-fui-en {
    font-family: 'GAU Root', 'Share Tech Mono', 'Consolas', monospace;
    letter-spacing: 0.05em;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
}

.app-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    z-index: -1;
}

/* FUI: スプラッシュと同じ薄いグリッド */
.app-background::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--fui-grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--fui-grid-line) 1px, transparent 1px);
    background-size: 20px 20px;
    pointer-events: none;
}

.app-background::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(255,255,255,0.5) 0%, transparent 60%);
    pointer-events: none;
}

.glass-container {
    width: 90%;
    max-width: 480px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    gap: 32px;
    position: relative;
    z-index: 10;
}

/* FUI: 四隅 L 字フレーム（スプラッシュと同じ語彙） */
.mt-frame {
    position: absolute;
    inset: 12px;
    pointer-events: none;
    z-index: 0;
}

.mt-corner {
    position: absolute;
    width: 20px;
    height: 20px;
    border-color: var(--fui-border);
    border-style: solid;
    border-width: 0;
}

.mt-corner-tl {
    top: 0;
    left: 0;
    border-top-width: 2px;
    border-left-width: 2px;
}

.mt-corner-tr {
    top: 0;
    right: 0;
    border-top-width: 2px;
    border-right-width: 2px;
}

.mt-corner-bl {
    bottom: 0;
    left: 0;
    border-bottom-width: 2px;
    border-left-width: 2px;
}

.mt-corner-br {
    bottom: 0;
    right: 0;
    border-bottom-width: 2px;
    border-right-width: 2px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 2;
}

header h1 {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: var(--text-shadow-strong);
    letter-spacing: 0.08em;
}

.mode-switch {
    background: rgba(0, 0, 0, 0.06);
    padding: 4px;
    border-radius: 12px;
    display: flex;
}

.mode-switch button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 6px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
    touch-action: manipulation;
    text-shadow: var(--text-shadow);
}

.mode-switch button.active {
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    text-shadow: var(--text-shadow);
}

main {
    position: relative;
    z-index: 2;
}

/* Visualizer */
.visualizer {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 240px;
    position: relative;
    margin-bottom: 30px;
}

/* FUI: ビジュアライザー周りだけ薄い枠（スプラッシュのフレームと同系統） */
.mt-visualizer-frame {
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid var(--fui-border);
    border-radius: 12px;
    padding: 16px;
}
.mt-visualizer-frame::before {
    content: '';
    position: absolute;
    inset: 8px;
    border: 1px solid transparent;
    border-radius: 8px;
    pointer-events: none;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.04);
}

#conductor-canvas {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 0;
    opacity: 1.0;
    pointer-events: none;
    /* Allows clicks to pass through if overlapping */
}

.beat-indicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    transition: transform 0.1s;
    box-shadow: 0 0 0 rgba(56, 189, 248, 0);
    z-index: 1;
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -10px;
    margin-left: -10px;
}

.beat-indicator.active {
    background-color: var(--accent-color);
    transform: scale(1.5);
    box-shadow: 0 2px 12px var(--accent-glow);
}

.beat-indicator.downbeat {
    background-color: var(--text-primary);
    transform: scale(2.0);
    box-shadow: var(--text-shadow-strong);
}

.beat-counter {
    position: absolute;
    bottom: -10px;
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    text-shadow: var(--text-shadow-strong);
    z-index: 2;
    opacity: 0.5;
    font-variant-numeric: tabular-nums;
}

.beat-counter.active {
    opacity: 1;
}

/* Sequence Progress Overlay (visible when playing in Sequence mode) */
.seq-progress-overlay {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 24px);
    z-index: 3;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 12px 20px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--text-shadow);
}

.seq-progress-overlay.hidden {
    display: none !important;
}

.seq-progress-info {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 10px;
}

.seq-practice-label {
    opacity: 0.85;
    margin-left: 2px;
}

.seq-step-label,
.seq-bar-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-shadow: var(--text-shadow);
}

.seq-bar-label {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.seq-bar-label span:first-of-type {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 800;
    text-shadow: var(--text-shadow-strong);
}

.seq-progress-bar-wrap {
    height: 6px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 3px;
    overflow: hidden;
}

.seq-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #94a3b8);
    border-radius: 3px;
    width: 0%;
    transition: width 0.2s ease-out;
}

/* Controls */
.controls-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: opacity 0.3s ease;
}

.hidden {
    display: none !important;
}

/* Volume Control */
.control-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.control-row label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    width: 30px;
    text-shadow: var(--text-shadow);
}

#volume-slider {
    flex: 1;
}

.tempo-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tempo-value {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#bpm-display {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: 0.02em;
    color: var(--text-primary);
    text-shadow: var(--text-shadow-strong);
    font-variant-numeric: tabular-nums;
}

.bpm-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 2px;
    text-shadow: var(--text-shadow);
}

.tempo-adjust {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    box-shadow: var(--text-shadow);
}

.tempo-adjust:hover {
    background: #fff;
    transform: translateY(-2px);
    box-shadow: var(--text-shadow-strong);
}

.tempo-mult-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-left: 4px;
    text-shadow: var(--text-shadow);
}

.tempo-mult-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.tempo-mult-row label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    width: 56px;
}

.tempo-mult-shared {
    margin-bottom: 4px;
}

.tempo-mult-btns {
    display: flex;
    gap: 6px;
}

.tempo-mult-btn {
    flex: 1;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    text-shadow: var(--text-shadow);
}

.tempo-mult-btn:hover {
    background: rgba(0, 0, 0, 0.06);
    color: var(--text-primary);
}

.tempo-mult-btn.active {
    background: rgba(255, 255, 255, 0.9);
    border-color: var(--glass-border);
    color: var(--text-primary);
    box-shadow: var(--text-shadow);
}

input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    /* Standard */
    width: 100%;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 24px;
    width: 24px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    margin-top: -10px;
    box-shadow: var(--text-shadow-strong);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 2px;
}

/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.setting-item {
    background: rgba(0, 0, 0, 0.03);
    padding: 12px 16px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border: 1px solid var(--glass-border);
}

.setting-item.full-width {
    grid-column: span 2;
}

.setting-item label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    text-shadow: var(--text-shadow);
}

select {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    outline: none;
    width: 100%;
    text-shadow: var(--text-shadow);
}

select option {
    background-color: #fff;
    color: var(--text-primary);
}

/* Inputs */
.small-input {
    width: 60px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 6px;
    border-radius: 6px;
    text-align: center;
    font-size: 1rem;
    font-weight: 600;
    text-shadow: var(--text-shadow);
}

.input-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.unit {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-shadow: var(--text-shadow);
}

/* Sound Section */
.sound-section {
    background: rgba(0, 0, 0, 0.03);
    padding: 12px 16px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    border: 1px solid var(--glass-border);
}

.sound-section-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    text-shadow: var(--text-shadow);
}

.sound-preset-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sound-preset-row label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    width: 36px;
    text-shadow: var(--text-shadow);
}

.sound-preset-row select {
    flex: 1;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--glass-border);
    padding: 8px 10px;
    border-radius: 8px;
    color: var(--text-primary);
}

.sound-detail-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}

.sound-detail-item label {
    display: block;
    font-size: 0.65rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-shadow: var(--text-shadow);
}

.sound-detail-item select,
.sound-detail-item input {
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 6px 8px;
    border-radius: 6px;
    font-size: 0.85rem;
    text-shadow: var(--text-shadow);
}

/* Template Row */
.template-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.template-row label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    width: 60px;
    text-shadow: var(--text-shadow);
}

.template-row #template-select {
    flex: 1;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--glass-border);
    padding: 8px 12px;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
    text-shadow: var(--text-shadow);
}

.template-row .secondary-btn.small {
    padding: 8px 16px;
    white-space: nowrap;
}

/* Sequence Editor */
.practice-group {
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px;
    margin-bottom: 8px;
}

.practice-group-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.group-label {
    font-weight: 500;
}

.group-practice-no {
    width: 72px;
    padding: 4px 8px;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    color: var(--text-primary);
}

.group-practice-no::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.add-block-btn {
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 28px;
    height: 28px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.add-block-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}

.remove-group {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    margin-left: auto;
}

.remove-group:hover {
    color: var(--danger);
}

.practice-group-blocks {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sequence-add-btns {
    display: flex;
    gap: 8px;
    align-items: center;
}

.sequence-list {
    max-height: 240px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-right: 4px;
}

.sequence-list::-webkit-scrollbar {
    width: 4px;
}

.sequence-list::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.12);
    border-radius: 2px;
}

.sequence-step {
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px;
    margin-bottom: 8px;
}

.step-type-select {
    width: auto;
    font-size: 0.8rem;
    padding: 2px 8px;
    margin-left: 8px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 4px;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.step-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-shadow: var(--text-shadow);
}

.step-practice-no {
    width: 90px;
    min-width: 60px;
    padding: 4px 8px;
    font-size: 0.75rem;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    color: var(--text-primary);
    flex: 1;
}

.step-practice-no::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.start-from-here-btn {
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 28px;
    height: 28px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all 0.2s;
    flex-shrink: 0;
}

.start-from-here-btn:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: scale(1.05);
}

.remove-step {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 0.5;
    padding: 0;
}

.remove-step:hover {
    color: var(--danger);
}

.step-controls {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 0.8fr;
    /* More space */
    gap: 6px;
    align-items: end;
}

.step-controls.type-fermata {
    display: block;
}

/* Focus Mode (Auto-Hide UI) */
.focus-active header,
.focus-active .volume-control,
.focus-active #bpm-slider,
.focus-active .settings-grid,
.focus-active .sequence-list,
.focus-active .sequence-add-btns,
.focus-active #add-step-btn,
.focus-active .sequence-options {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.focus-active .tempo-display {
    /* Ensure tempo display remains visible */
    opacity: 1;
}

.focus-active .glass-container {
    /* Optional: darken background slightly? */
    backdrop-filter: blur(20px);
}

.input-group.full-width {
    width: 100%;
}

.input-group label {
    display: block;
    font-size: 0.65rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
    text-shadow: var(--text-shadow);
}

.input-group input,
.input-group select {
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.9rem;
    text-shadow: var(--text-shadow);
}

/* Ramp Toggle Row */
.ramp-toggle-row {
    grid-column: span 3;
    display: flex;
    align-items: center;
    margin: 4px 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem !important;
    cursor: pointer;
    color: var(--text-primary) !important;
}

.checkbox-label input {
    width: auto !important;
    margin: 0;
}

.ramp-end-group {
    grid-column: span 1;
}

.secondary-btn {
    background: rgba(0, 0, 0, 0.03);
    color: var(--text-secondary);
    border: 1px dashed var(--glass-border);
    width: 100%;
    padding: 12px;
    border-radius: 12px;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
    text-shadow: var(--text-shadow);
}

.secondary-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
    border-style: solid;
}

/* Action Area */
.action-area {
    display: flex;
    justify-content: center;
}

.play-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--accent-color);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--text-shadow-strong);
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.play-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.play-btn:active {
    transform: scale(0.95);
}

.play-btn.playing {
    background: var(--danger);
    box-shadow: 0 2px 12px rgba(220, 38, 38, 0.3);
}

.icon-play {
    width: 0;
    height: 0;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    border-left: 24px solid #fff;
    margin-left: 6px;
    transition: all 0.2s;
    filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.1));
}

.play-btn.playing .icon-play {
    border: none;
    width: 20px;
    height: 20px;
    background: #fff;
    margin-left: 0;
    border-radius: 4px;
}

/* Mobile Responsiveness */
@media (max-width: 480px) {
    .seq-progress-overlay {
        width: calc(100% - 16px);
        padding: 10px 14px;
    }

    .seq-bar-label {
        font-size: 1.1rem;
    }

    .seq-bar-label span:first-of-type {
        font-size: 1.3rem;
    }

    .glass-container {
        width: 95%;
        padding: 20px;
        gap: 20px;
    }

    #bpm-display {
        font-size: 3rem;
    }

    .visualizer {
        height: 180px;
    }

    #conductor-canvas {
        max-width: 100%;
        height: auto;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }

    .setting-item.full-width {
        grid-column: span 1;
    }

    .sound-detail-row {
        grid-template-columns: 1fr;
    }

    /* Sequence Editor Mobile */
    .step-controls {
        grid-template-columns: 1fr 1fr;
        /* 2 columns */
        gap: 12px;
    }

    /* Ramp toggle row should span both columns */
    .ramp-toggle-row {
        grid-column: span 2;
    }

    /* Make the Bars input span 1 and Sig span 1 -> fits naturally in 2 cols */

    /* Adjust input groups */
    .input-group label {
        font-size: 0.75rem;
    }

    .step-header {
        font-size: 0.9rem;
    }

    .play-btn {
        width: 70px;
        height: 70px;
    }
}