:root { 
    --bg: #0f172a; 
    --panel: #1e293b; 
    --panel-dark: #162032;
    --accent: #10b981; 
    --accent-hover: #059669; 
    --purple: #8b5cf6; 
    --text: #f8fafc; 
    --text-muted: #94a3b8; 
    --border: #334155; 
}

* { box-sizing: border-box; }

body { margin: 0; display: flex; height: 100vh; background-color: var(--bg); color: var(--text); font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; overflow: hidden; }

a#backToLab {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 150;
    color: var(--text-muted); 
    text-decoration: none; 
    font-size: 13px; 
    font-weight: 600; 
    background: rgba(15, 23, 42, 0.8); 
    padding: 8px 16px; 
    border-radius: 6px; 
    transition: 0.3s; 
    display: flex; 
    align-items: center; 
    gap: 8px; 
    border: 1px solid var(--border); 
}
a#backToLab:hover { color: white; background: var(--purple); border-color: var(--purple); }

/* PAINÉIS LATERAIS */
.sidebar { width: 380px; background: var(--panel); border-right: 1px solid var(--border); display: flex; flex-direction: column; overflow-y: auto; z-index: 10; box-shadow: 2px 0 20px rgba(0,0,0,0.5); flex-shrink: 0; }
.sidebar-right { width: 340px; background: var(--panel); border-left: 1px solid var(--border); display: none; flex-direction: column; overflow-y: auto; z-index: 10; box-shadow: -2px 0 20px rgba(0,0,0,0.5); flex-shrink: 0; }

/* Animação suave para a abertura do Painel Direito */
.sidebar-right.active { display: flex; animation: slideInRight 0.3s ease-out forwards; }
@keyframes slideInRight {
    from { transform: translateX(30px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.sidebar::-webkit-scrollbar, .sidebar-right::-webkit-scrollbar { width: 6px; } 
.sidebar::-webkit-scrollbar-thumb, .sidebar-right::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }

.sidebar-header { padding: 25px 20px 15px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; background: var(--panel-dark); }
.panel-section { padding: 15px 20px; border-bottom: 1px solid var(--border); }
.section-title { font-size: 12px; font-weight: bold; text-transform: uppercase; color: var(--purple); margin-bottom: 15px; letter-spacing: 1px; border-bottom: 1px solid var(--border); padding-bottom: 8px; display: flex; align-items: center; gap: 8px;}

/* CONTROLES E INPUTS */
.control-group { margin-bottom: 12px; }
label { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); margin-bottom: 5px; text-transform: uppercase;}
.control-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }
.control-row label { margin-bottom: 0; }

.num-input { width: 45px; background: rgba(16, 185, 129, 0.1); color: var(--accent); border: 1px solid rgba(16, 185, 129, 0.3); border-radius: 4px; padding: 2px 4px; font-size: 11px; font-weight: bold; font-family: monospace; text-align: center; outline: none; transition: 0.2s;}
.num-input:focus { border-color: var(--accent); background: rgba(16, 185, 129, 0.2); box-shadow: 0 0 5px rgba(16, 185, 129, 0.5);}
.num-input::-webkit-inner-spin-button, .num-input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

input[type="range"].horizontal-slider { width: 100%; -webkit-appearance: none; background: transparent; }
input[type="range"].horizontal-slider::-webkit-slider-thumb { -webkit-appearance: none; height: 14px; width: 14px; border-radius: 50%; background: var(--accent); cursor: pointer; margin-top: -5px; box-shadow: 0 0 8px rgba(16, 185, 129, 0.5); }
input[type="range"].horizontal-slider::-webkit-slider-runnable-track { width: 100%; height: 4px; cursor: pointer; background: var(--border); border-radius: 2px; }

select, input[type="file"] { width: 100%; padding: 8px 10px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); color: white; font-size: 12px; outline: none; font-family: inherit; }
input[type="color"] { width: 100%; height: 32px; padding: 2px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); cursor: pointer; }

/* BOTÕES E SWITCHES */
button { border: none; border-radius: 6px; cursor: pointer; font-weight: bold; transition: all 0.2s; font-size: 12px; display: flex; justify-content: center; align-items: center; gap: 8px;}
.btn-full { width: 100%; padding: 12px; margin-bottom: 10px; }
.btn-primary { background: var(--purple); color: white; box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3); }
.btn-primary:hover { background: #7c3aed; }
.btn-success { background: var(--accent); color: white; box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3); }
.btn-success:hover { background: var(--accent-hover); }
.btn-danger { background: #ef4444; color: white; box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3); }
.btn-danger:hover { background: #dc2626; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--border); }

.transport-btn { flex: 1; padding: 10px 0; font-size: 16px; background: var(--panel); color: white; border-radius: 4px; transition: 0.3s;}
.transport-btn:hover { background: var(--border); color: var(--accent); }
.transport-btn.active { background: var(--accent); color: white; border-color: var(--accent) !important; }

/* BORRACHA ATIVA */
#eraserModeBtn.active { background: #f59e0b; color: white; }

.switch { position: relative; display: inline-block; width: 42px; height: 22px; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch-bg { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; border-radius: 24px; transition: .3s; background-color: var(--border); }
.switch input:checked + .switch-bg { background-color: var(--accent); }
.switch-bg:before { position: absolute; content: ""; height: 16px; width: 16px; left: 3px; bottom: 3px; background-color: white; border-radius: 50%; transition: .3s; }
.switch input:checked + .switch-bg:before { transform: translateX(20px); }

/* FADERS (MIXER) E KNOBS */
.mixer-container { display: flex; justify-content: space-around; padding: 10px 0; background: var(--panel-dark); border-radius: 8px; border: 1px solid var(--border); margin-bottom: 15px; }
.fader-channel { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.fader-wrapper { height: 90px; display: flex; justify-content: center; align-items: center; }
/* fader vertical no padrão atual (o antigo slider-vertical foi descontinuado nos navegadores) */
input[type="range"].vertical-fader { writing-mode: vertical-lr; direction: rtl; width: 8px; height: 90px; padding: 0 5px; outline: none; accent-color: var(--accent); }
.fader-label { font-size: 10px; color: var(--text-muted); font-weight: bold; text-transform: uppercase; }

/* KNOBS - Grid de 4 Colunas no painel esquerdo, 5 no direito */
.knobs-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px 10px; background: var(--panel-dark); padding: 15px 10px; border-radius: 8px; border: 1px solid var(--border); margin-top: 10px; }
.track-knobs-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px 5px; padding: 5px 0; }
.knob-wrapper { display: flex; flex-direction: column; align-items: center; gap: 5px; }
.knob { width: 36px; height: 36px; border-radius: 50%; background: linear-gradient(145deg, #1e293b, #0f172a); border: 2px solid var(--border); position: relative; cursor: ns-resize; box-shadow: inset 0 2px 5px rgba(0,0,0,0.5), 0 2px 5px rgba(0,0,0,0.5); display: flex; justify-content: center; align-items: center; margin-bottom: 2px;}
.knob-pointer { width: 4px; height: 14px; background: var(--accent); border-radius: 2px; position: absolute; top: 2px; transform-origin: center 16px; transform: rotate(-135deg); transition: transform 0.1s; }
.knob-label { font-size: 9px; color: var(--text-muted); font-weight: bold; text-transform: uppercase; letter-spacing: 0.5px; text-align: center; margin-bottom: 2px; }

/* MULTITRACK CARDS (Para as faixas adicionais) */
.track-card { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 10px; overflow: hidden; transition: 0.3s; }
.track-card.active-target { border-color: var(--accent); box-shadow: 0 0 15px rgba(16, 185, 129, 0.3); }
.track-card.active-target .track-header { background: rgba(16, 185, 129, 0.1); }
.track-header { display: flex; justify-content: space-between; align-items: center; padding: 10px 15px; background: var(--panel-dark); cursor: pointer; border-bottom: 1px solid transparent; }
.track-card.expanded .track-header { border-bottom-color: var(--border); }
.track-title { font-size: 12px; font-weight: bold; color: white; display: flex; align-items: center; gap: 8px; }
.track-indicator { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }
.track-card.active-target .track-indicator { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.track-actions { display: flex; gap: 5px; }
.track-btn { width: 28px; height: 28px; border-radius: 4px; background: var(--panel); border: 1px solid var(--border); color: var(--text-muted); cursor: pointer; transition: 0.2s; display: flex; justify-content: center; align-items: center; font-size: 11px; }
.track-btn:hover { background: var(--border); color: white; }
.track-btn.active { background: var(--accent); color: white; border-color: var(--accent); }
.track-btn.delete:hover { background: #ef4444; color: white; border-color: #ef4444; }
.track-body { padding: 15px; display: none; }
.track-card.expanded .track-body { display: block; }

/* GRUPOS DE BOTÕES DE INSTRUMENTOS */
.btn-group { display: flex; gap: 4px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 4px; }
.btn-toggle { flex: 1; background: transparent; color: var(--text-muted); border: none; border-radius: 4px; padding: 8px 4px; cursor: pointer; transition: 0.2s; font-size: 11px; display: flex; justify-content: center; align-items: center; gap: 5px; }
.btn-toggle:hover { color: white; background: rgba(255,255,255,0.05); }
.btn-toggle.active { background: var(--panel); color: var(--accent); box-shadow: 0 2px 5px rgba(0,0,0,0.2); }
.btn-toggle svg { width: 16px; height: 16px; }

/* CANVAS AREA */
.workspace { flex: 1; position: relative; overflow: hidden; display: flex; justify-content: center; align-items: center; background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%); transition: width 0.3s ease; }
.canvas-container { position: relative; box-shadow: 0 10px 40px rgba(0,0,0,0.5); border: 1px solid rgba(255,255,255,0.05); }
canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
#playheadCanvas { pointer-events: none; z-index: 10; mix-blend-mode: screen; }
#recordCanvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; opacity: 0; pointer-events: none; }
#paintCanvas { touch-action: none; }

.zoom-controls { position: absolute; bottom: 20px; right: 20px; display: flex; gap: 5px; z-index: 50; }
.zoom-controls button { width: 40px; height: 40px; border-radius: 50%; background: var(--panel); border: 1px solid var(--border); color: white; font-size: 18px; box-shadow: 0 4px 10px rgba(0,0,0,0.3); }
.zoom-controls button:hover { background: var(--purple); border-color: var(--purple); }

.loader-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(15, 23, 42, 0.9); z-index: 1000; display: none; flex-direction: column; justify-content: center; align-items: center; }
.loader-overlay.active { display: flex; }
.loader-text { color: var(--accent); margin-top: 20px; font-weight: bold; font-size: 18px; letter-spacing: 1px; }

/* ===================== MELHORIAS v2.00 ===================== */

/* Firefox: sliders horizontais no mesmo estilo */
input[type="range"].horizontal-slider::-moz-range-thumb { height: 14px; width: 14px; border: none; border-radius: 50%; background: var(--accent); cursor: pointer; box-shadow: 0 0 8px rgba(16, 185, 129, 0.5); }
input[type="range"].horizontal-slider::-moz-range-track { height: 4px; background: var(--border); border-radius: 2px; }

button:focus-visible, .knob:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Cards das faixas */
.track-bloco { margin-bottom: 12px; border-bottom: 1px dashed var(--border); padding-bottom: 12px; }
.track-mini-clock { cursor: pointer; margin-left: 8px; font-family: monospace; font-size: 11px; color: var(--accent); background: rgba(0,0,0,0.3); padding: 4px 8px; border-radius: 4px; font-weight: normal; }
.track-engine-group .btn-toggle, .track-wave-group .btn-toggle { padding: 7px 2px; }
.track-wave-group svg { width: 14px; height: 14px; }
#btn-salvar-acervo.salvo { border-color: #059669; color: #34d399; background: rgba(6, 78, 59, 0.2); }

/* Barra de botões do canto superior esquerdo do workspace */
.barra-workspace { position: absolute; top: 20px; left: 20px; z-index: 150; display: flex; gap: 6px; }
.btn-workspace { background: rgba(15, 23, 42, 0.85); color: var(--text-muted); border: 1px solid var(--border); padding: 8px 12px; font-size: 12px; font-weight: 600; border-radius: 6px; }
.btn-workspace:hover { color: white; border-color: var(--purple); }
.btn-workspace.active, .btn-workspace[aria-expanded="true"] { background: var(--purple); border-color: var(--purple); color: white; }
.btn-gaveta-esq, .btn-gaveta-dir { display: none; }

/* Aviso flutuante (ex.: "Projeto zerado — Desfazer") */
.aviso-flutuante { position: fixed; left: 50%; bottom: 90px; transform: translate(-50%, 20px); background: #0b1220; border: 1px solid var(--border); color: var(--text); padding: 10px 16px; border-radius: 8px; font-size: 13px; display: flex; gap: 14px; align-items: center; z-index: 2000; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; box-shadow: 0 10px 30px rgba(0,0,0,.5); max-width: calc(100vw - 32px); }
.aviso-flutuante.visivel { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.aviso-flutuante button { background: transparent; color: var(--accent); border: 1px solid var(--accent); padding: 4px 10px; font-size: 12px; }
.aviso-flutuante button:hover { background: var(--accent); color: white; }

/* Painel de atalhos */
.painel-atalhos { position: fixed; inset: 0; background: rgba(2, 6, 23, 0.7); backdrop-filter: blur(4px); z-index: 3000; display: none; align-items: center; justify-content: center; padding: 16px; }
.painel-atalhos.visivel { display: flex; }
.painel-atalhos-caixa { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; width: 100%; max-width: 440px; padding: 18px 20px; box-shadow: 0 20px 50px rgba(0,0,0,.6); }
.painel-atalhos-topo { display: flex; justify-content: space-between; align-items: center; color: white; font-weight: bold; margin-bottom: 12px; }
.painel-atalhos-fechar { background: transparent; color: var(--text-muted); font-size: 16px; padding: 4px 8px; }
.painel-atalhos-fechar:hover { color: white; }
.painel-atalhos dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; margin: 0; font-size: 12px; }
.painel-atalhos dt { color: var(--text-muted); white-space: nowrap; }
.painel-atalhos dd { margin: 0; color: var(--text); }
.painel-atalhos kbd { background: var(--bg); border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 4px; padding: 1px 6px; font-family: monospace; font-size: 11px; color: white; }

/* Modo ajuda (textos do help.json) */
body.modo-ajuda .sidebar [id], body.modo-ajuda .sidebar [data-target], body.modo-ajuda .sidebar [data-knob] { cursor: help; }
.balao-ajuda { position: fixed; z-index: 4000; max-width: 280px; background: rgba(15, 23, 42, 0.97); border: 1px solid #0891b2; border-radius: 6px; padding: 10px 12px; pointer-events: none; display: none; box-shadow: 0 10px 30px rgba(0,0,0,.5); }
.balao-ajuda.visivel { display: block; }
.balao-ajuda strong { display: block; color: #22d3ee; font-size: 11px; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }
.balao-ajuda p { margin: 0; color: #cbd5e1; font-size: 12px; line-height: 1.45; }

/* ===================== TELAS MENORES ===================== */
.gaveta-fundo { display: none; }

@media (max-width: 1280px) {
    /* painel Master vira gaveta pela direita */
    .btn-gaveta-dir { display: flex; }
    .sidebar-right, .sidebar-right.active { position: fixed; top: 0; right: 0; bottom: 0; z-index: 900; transform: translateX(100%); transition: transform .3s ease; animation: none; display: flex; max-width: 90vw; }
    body.gaveta-direita .sidebar-right { transform: translateX(0); }
    body.gaveta-direita .gaveta-fundo, body.gaveta-esquerda .gaveta-fundo { display: block; position: fixed; inset: 0; background: rgba(2, 6, 23, 0.55); z-index: 850; }
}

@media (max-width: 860px) {
    /* painel de faixas também vira gaveta, pela esquerda */
    .btn-gaveta-esq { display: flex; }
    .sidebar-left { position: fixed; top: 0; left: 0; bottom: 0; z-index: 900; transform: translateX(-100%); transition: transform .3s ease; max-width: 90vw; }
    body.gaveta-esquerda .sidebar-left { transform: translateX(0); }
    .workspace { width: 100%; }
    .barra-workspace { top: 12px; left: 12px; flex-wrap: wrap; right: 120px; }
    a#backToLab { top: 12px; right: 12px; padding: 8px 10px; }
    a#backToLab span { display: none; }
    .zoom-controls { bottom: 80px; right: 12px; }
    .master-clock { bottom: 16px; }
}

@media (max-width: 480px) {
    .btn-workspace span { display: none; }
    .sidebar-left, .sidebar-right, .sidebar-right.active { width: 100vw; max-width: 100vw; }
}