/* ============================================================
   warehouse/metronome.css - ОНЛАЙН-МЕТРОНОМ
   Версия: 3.0 - УДАЛЕНА TRANSITION У МАЯТНИКА + ОПТИМИЗАЦИЯ
   ============================================================ */

/* ============================================================
   ПЕРЕМЕННЫЕ
   ============================================================ */
:root {
    --bg-deep: #0d0b09;
    --bg-card: #14110e;
    --bg-surface: #161310;
    --text-primary: #ede4d8;
    --text-secondary: #d4c8b8;
    --text-muted: #b8aa9a;
    --text-dim: #8a7a6a;
    --accent-gold: #d4a853;
    --accent-gold-light: #e8c878;
    --border-subtle: #2a241e;
    --border-glow: rgba(212,168,83,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,.2);
    --shadow-md: 0 4px 24px rgba(0,0,0,.3);
    --shadow-lg: 0 16px 48px rgba(0,0,0,.5);
    --shadow-gold: 0 4px 20px rgba(212,168,83,.35);
    --transition-fast: .15s ease;
    --transition-smooth: .3s cubic-bezier(.34,1.56,.64,1);
    --gradient-gold: linear-gradient(145deg,#d4a853,#e8c878);
    --font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --z-sticky: 100;
    --z-modal: 1000;
    --z-toast: 9999;
    --container-max: 1200px;
    --font-size-base: 16px;
    --spacing-base: 1rem;
}

/* ============================================================
   КОНТЕЙНЕР
   ============================================================ */
.metronome-wrapper {
    max-width: 540px;
    margin: 0 auto;
    padding: 12px 16px 24px;
    background-color: var(--bg-deep);
    color: var(--text-primary);
    min-height: 85vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.metronome-header {
    text-align: center;
    margin-bottom: 16px;
}

.metronome-header h1 {
    font-size: 1.6rem;
    font-weight: 300;
    letter-spacing: 3px;
    color: var(--accent-gold);
    margin-bottom: 2px;
}

.metronome-header p {
    color: var(--text-muted);
    font-size: .85rem;
    opacity: .7;
}

/* ============================================================
   ДИСПЛЕЙ
   ============================================================ */
.metronome-display {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 20px 16px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    margin-bottom: 16px;
    animation: metronomeFadeIn .4s cubic-bezier(.34,1.56,.64,1);
}

.bpm-display {
    font-size: 4.5rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--accent-gold);
    font-variant-numeric: tabular-nums;
    font-family: var(--font-family);
    letter-spacing: -2px;
    transition: color .3s ease;
    cursor: pointer;
    user-select: none;
}

.bpm-display:hover {
    color: var(--accent-gold-light);
}

.bpm-display .bpm-label {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: 4px;
    letter-spacing: 1px;
}

.time-signature-display {
    font-size: .85rem;
    color: var(--text-dim);
    margin-top: 2px;
}

.time-signature-display strong {
    color: var(--accent-gold);
}

/* ============================================================
   ЛЕГЕНДА АКЦЕНТОВ
   ============================================================ */
.accent-legend {
    display: flex;
    justify-content: center;
    gap: 12px;
    font-size: .6rem;
    color: var(--text-dim);
    margin: 4px 0 6px;
    flex-wrap: wrap;
}

.accent-legend span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.accent-legend .dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot-strong { background: #ff4757; }
.dot-sub { background: #ffa502; }
.dot-medium { background: #00c864; }
.dot-none { background: var(--border-subtle); }

/* ============================================================
   ИНДИКАТОРЫ ДОЛЕЙ
   ============================================================ */
.beat-indicators {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin: 10px 0 6px;
    flex-wrap: wrap;
}

.beat-dot {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--border-subtle);
    border: 2px solid transparent;
    transition: all .15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .65rem;
    font-weight: 700;
    color: var(--text-dim);
    cursor: pointer;
    user-select: none;
    touch-action: manipulation;
    position: relative;
}

.beat-dot:hover {
    border-color: var(--text-dim);
    transform: scale(1.05);
}

.beat-dot .beat-number {
    font-size: .55rem;
    opacity: .5;
}

.beat-dot.active .beat-number {
    opacity: 1;
}

.beat-dot.active {
    border-color: var(--accent-gold);
    background: rgba(212,168,83,.15);
    box-shadow: 0 0 20px rgba(212,168,83,.3);
    color: var(--accent-gold);
}

.beat-dot.active.strong {
    border-color: #ff4757;
    background: rgba(255,71,87,.2);
    box-shadow: 0 0 25px rgba(255,71,87,.3);
    color: #ff4757;
}

.beat-dot.active.sub-accent {
    border-color: #ffa502;
    background: rgba(255,165,2,.2);
    box-shadow: 0 0 25px rgba(255,165,2,.3);
    color: #ffa502;
}

.beat-dot.active.medium {
    border-color: #00c864;
    background: rgba(0,200,100,.15);
    box-shadow: 0 0 20px rgba(0,200,100,.3);
    color: #00c864;
}

/* ============================================================
   ⭐ МАЯТНИК — УДАЛЕНА TRANSITION ДЛЯ ПЛАВНОСТИ
   ============================================================ */
.pendulum-container {
    width: 100%;
    height: 120px;
    position: relative;
    margin: 6px 0 2px;
    overflow: visible;
}

.pendulum-arm {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 3px;
    height: 90px;
    background: linear-gradient(to top, var(--accent-gold), rgba(212,168,83,.2));
    transform-origin: bottom center;
    /* ⚠️ УДАЛЕНО: transition: transform .05s linear; — конфликт с rAF */
    border-radius: 3px 3px 0 0;
    box-shadow: 0 0 20px rgba(212,168,83,.3);
    will-change: transform;
}

.pendulum-arm::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-gold);
    box-shadow: 0 0 30px rgba(212,168,83,.3);
    border: 2px solid rgba(255,255,255,.1);
}

.pendulum-arm .pendulum-bob {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-gold);
    box-shadow: 0 0 30px rgba(212,168,83,.3);
    border: 2px solid rgba(255,255,255,.15);
    transition: background .15s ease, box-shadow .15s ease;
}

.pendulum-arm .pendulum-bob.beat {
    background: #00c864;
    box-shadow: 0 0 40px rgba(0,200,100,.3);
}

.pendulum-arm .pendulum-bob.strong-beat {
    background: #ff4757;
    box-shadow: 0 0 50px rgba(255,71,87,.4);
}

.pendulum-arm .pendulum-bob.sub-accent {
    background: #ffa502;
    box-shadow: 0 0 50px rgba(255,165,2,.4);
}

.pendulum-arm .pendulum-bob.medium-accent {
    background: #00c864;
    box-shadow: 0 0 40px rgba(0,200,100,.3);
}

.pendulum-center {
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--border-subtle);
    border: 2px solid var(--accent-gold);
    z-index: 5;
    box-shadow: 0 0 20px rgba(212,168,83,.15);
}

/* ============================================================
   ШКАЛА BPM
   ============================================================ */
.bpm-scale {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 8px;
    margin: 6px 0 2px;
    font-size: .6rem;
    color: var(--text-dim);
    user-select: none;
}

.bpm-scale span {
    opacity: .5;
    transition: opacity .3s ease, color .3s ease;
    cursor: default;
    padding: 2px 4px;
    border-radius: 4px;
}

.bpm-scale span.active {
    opacity: 1;
    color: var(--accent-gold);
    font-weight: 600;
    background: rgba(212,168,83,.1);
}

/* ============================================================
   УПРАВЛЕНИЕ
   ============================================================ */
.controls-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin: 10px 0 6px;
    flex-wrap: wrap;
}

.bpm-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    color: var(--text-muted);
    font-size: 1.2rem;
    font-weight: 600;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all .25s ease;
    font-family: var(--font-family);
    user-select: none;
    touch-action: manipulation;
}

.bpm-btn:hover {
    border-color: var(--accent-gold);
    color: var(--text-primary);
    background: rgba(212,168,83,.05);
    transform: scale(1.05);
}

.bpm-btn:active {
    transform: scale(.92);
}

.bpm-slider {
    flex: 1;
    min-width: 120px;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--border-subtle);
    outline: none;
    cursor: pointer;
}

.bpm-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-gold);
    cursor: pointer;
    box-shadow: 0 0 20px rgba(212,168,83,.3);
    border: 2px solid rgba(255,255,255,.1);
    transition: all .2s ease;
}

.bpm-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 0 30px rgba(212,168,83,.3);
}

.bpm-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-gold);
    cursor: pointer;
    border: 2px solid rgba(255,255,255,.1);
}

.bpm-slider:focus-visible {
    outline: 2px solid var(--accent-gold);
    outline-offset: 4px;
}

/* ============================================================
   НАСТРОЙКИ
   ============================================================ */
.settings-row {
    display: flex;
    gap: 8px;
    margin: 6px 0 4px;
    flex-wrap: wrap;
    justify-content: center;
}

.settings-group {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card);
    padding: 4px 8px;
    border-radius: 10px;
    border: 1px solid var(--border-subtle);
    flex: 1;
    min-width: 90px;
    max-width: 180px;
}

.settings-group label {
    font-size: .6rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: .5px;
    font-weight: 500;
    white-space: nowrap;
}

.settings-group select,
.settings-group input[type="number"] {
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    color: var(--text-primary);
    padding: 3px 6px;
    font-size: .75rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-family);
    outline: none;
}

.settings-group select:focus,
.settings-group input[type="number"]:focus {
    border-color: var(--accent-gold);
}

.settings-group select {
    min-width: 48px;
    flex: 1;
}

.settings-group select option {
    background: var(--bg-deep);
    color: var(--text-primary);
}

.settings-group input[type="number"] {
    width: 40px;
    text-align: center;
}

/* ============================================================
   ГЛАВНАЯ КНОПКА
   ============================================================ */
.main-btn {
    width: 100%;
    background: var(--accent-gold);
    border: none;
    border-radius: 14px;
    padding: 18px;
    color: #1a1510;
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(212,168,83,.25);
    transition: all .3s ease;
    font-family: var(--font-family);
    touch-action: manipulation;
}

.main-btn:active {
    transform: scale(.97);
}

.main-btn.active {
    background: #ff4757;
    box-shadow: 0 4px 20px rgba(255,71,87,.25);
    color: #fff;
}

.main-btn .icon {
    font-size: 1.4rem;
}

/* ============================================================
   ТЕСТОВАЯ КНОПКА
   ============================================================ */
.bpm-test-btn {
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-dim);
    padding: 4px 12px;
    font-size: .6rem;
    cursor: pointer;
    transition: all .3s ease;
    font-family: var(--font-family);
    margin-top: 4px;
}

.bpm-test-btn:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

/* ============================================================
   ПОДСКАЗКА
   ============================================================ */
.metronome-tip {
    text-align: center;
    font-size: .7rem;
    color: var(--text-dim);
    margin-top: 12px;
    line-height: 1.6;
    padding: 8px 12px;
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    background: rgba(255,255,255,.02);
}

.metronome-tip strong {
    color: var(--accent-gold);
}

.metronome-tip kbd {
    background: var(--border-subtle);
    padding: 1px 6px;
    border-radius: 4px;
    color: var(--text-muted);
    font-size: .65rem;
    font-family: inherit;
}

/* ============================================================
   АНИМАЦИИ
   ============================================================ */
@keyframes metronomeFadeIn {
    from {
        opacity: 0;
        transform: translateY(12px) scale(.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ============================================================
   SEO-ТЕКСТ
   ============================================================ */
.seo-text {
    margin-top: 20px;
    padding: 16px;
    border-top: 1px solid var(--border-subtle);
    font-size: .75rem;
    color: var(--text-dim);
    line-height: 1.8;
    text-align: center;
}

.seo-text a {
    color: var(--accent-gold);
    text-decoration: none;
}

.seo-text a:hover { text-decoration: underline; }

/* ============================================================
   АДАПТИВ
   ============================================================ */
@media (max-width: 480px) {
    .metronome-wrapper { padding: 8px 10px 16px; }
    .metronome-header h1 { font-size: 1.3rem; }
    .bpm-display { font-size: 3.5rem; }
    .bpm-display .bpm-label { font-size: 1rem; }
    .pendulum-container { height: 100px; }
    .pendulum-arm { height: 75px; }
    .bpm-btn { width: 38px; height: 38px; font-size: 1rem; }
    .main-btn { padding: 14px; font-size: 1rem; }
    .metronome-display { padding: 14px 10px; }
    .beat-dot { width: 28px; height: 28px; font-size: .55rem; }
    .settings-group { padding: 3px 6px; min-width: 70px; max-width: 150px; }
    .settings-group select { font-size: .7rem; min-width: 36px; padding: 2px 4px; }
    .settings-group input[type="number"] { width: 34px; font-size: .7rem; }
    .bpm-scale { font-size: .5rem; }
    .beat-indicators { gap: 4px; }
    .accent-legend { font-size: .5rem; gap: 8px; }
    .accent-legend .dot { width: 8px; height: 8px; }
    .settings-row { gap: 4px; }
    .metronome-tip { font-size: .6rem; }
}

@media (max-width: 380px) {
    .bpm-display { font-size: 2.8rem; }
    .pendulum-container { height: 80px; }
    .pendulum-arm { height: 60px; }
    .pendulum-arm .pendulum-bob { width: 14px; height: 14px; top: -8px; }
    .controls-row { gap: 10px; }
    .bpm-btn { width: 32px; height: 32px; font-size: .85rem; }
    .settings-row { gap: 4px; flex-direction: column; align-items: stretch; }
    .settings-group { max-width: 100%; min-width: 0; }
    .settings-group label { font-size: .55rem; }
    .settings-group select { font-size: .65rem; min-width: 32px; padding: 2px 4px; }
    .beat-dot { width: 24px; height: 24px; font-size: .5rem; }
    .beat-indicators { gap: 3px; }
    .main-btn .icon { font-size: 1.2rem; }
}

@media (min-width: 1024px) {
    .metronome-wrapper { max-width: 640px; padding: 24px 32px 40px; }
    .metronome-header h1 { font-size: 2rem; letter-spacing: 4px; }
    .metronome-header p { font-size: 0.95rem; }
    .metronome-display { padding: 28px 24px; border-radius: 20px; }
    .bpm-display { font-size: 5.5rem; }
    .bpm-display .bpm-label { font-size: 1.4rem; }
    .pendulum-container { height: 160px; }
    .pendulum-arm { height: 120px; }
    .beat-dot { width: 44px; height: 44px; font-size: 0.75rem; }
    .bpm-btn { width: 52px; height: 52px; font-size: 1.4rem; }
    .bpm-slider { min-width: 180px; }
    .main-btn { padding: 22px; font-size: 1.2rem; border-radius: 16px; }
    .settings-group { padding: 6px 12px; min-width: 120px; max-width: 220px; }
    .settings-group select { font-size: 0.85rem; padding: 4px 8px; }
    .bpm-test-btn { font-size: 0.7rem; padding: 6px 16px; }
    .metronome-tip { font-size: 0.8rem; padding: 10px 16px; }
}

@media (prefers-reduced-motion: reduce) {
    .pendulum-arm { transition: none !important; animation: none !important; }
    .beat-dot { transition: none !important; }
    .main-btn { transition: none !important; }
    .metronome-display { animation: none !important; }
}