/* Estúdio de bateria — layout dos painéis + grade (step sequencer).
   Reusa tokens globais (main.css) e componentes do trainer (bateria.css:
   .bateria-icon-btn, .bateria-play, .bateria-bpm-card). Monocromático, hairline
   de 4 lados, no padrão de card do site. */

.estudio-sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap; border: 0;
}

.estudio {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* --- Barra superior --- */
.estudio-topbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.estudio-topbar__left {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex: 1 1 300px;
    min-width: 0;
}
.estudio-title-field { flex: 1 1 auto; min-width: 0; }

.estudio-title-input {
    width: 100%;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    background: transparent;
    border: none;
    border-bottom: var(--line-width) solid var(--border-color);
    padding: 0.35rem 0.1rem;
}
.estudio-title-input:focus {
    outline: none;
    border-bottom-color: var(--text-primary);
}

.estudio-topbar__controls {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.estudio-download { flex: 0 0 auto; }

/* --- Botões de texto (novos, mesmo espírito do design system) --- */
.estudio-textbtn {
    font: inherit;
    font-size: 0.85rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: var(--line-width) solid var(--border-color);
    border-radius: 8px;
    padding: 0.4rem 0.7rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: border-color 0.15s ease, background 0.15s ease;
}
.estudio-textbtn:hover { border-color: var(--text-primary); }
.estudio-textbtn:focus-visible {
    outline: 2px solid var(--link-color);
    outline-offset: 2px;
}

/* --- Partitura: folha estática multi-linha (sistemas de 4 compassos) --- */
.estudio-notation {
    position: relative;
    border: var(--line-width) solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-secondary);
    padding: 0.5rem 0.6rem;
    max-height: 560px;
    overflow-y: auto;
    overflow-x: hidden;
}
.estudio-sheet__line {
    position: relative;
    width: 100%;
}
.estudio-sheet__line svg {
    display: block;
    width: 100%;
    height: auto;
}
/* Cursor de reprodução: linha vertical fina que varre a linha ativa. */
.estudio-sheet__playhead {
    position: absolute;
    top: 8%;
    bottom: 8%;
    width: 2px;
    margin-left: -1px;
    border-radius: 1px;
    background: var(--link-color);
    box-shadow: 0 0 4px color-mix(in srgb, var(--link-color) 45%, transparent);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.12s ease;
}
.estudio-sheet__playhead.is-active { opacity: 0.9; }

/* --- Bancada (editor de compassos + código embaixo) --- */
.estudio-editor,
.estudio-codedetails {
    border: var(--line-width) solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-primary);
    min-width: 0;
}
.estudio-editor { padding: 0.9rem; position: relative; }

.estudio-panel__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}
.estudio-panel__title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}
.estudio-panel__hint {
    font-size: 0.78rem;
    color: var(--text-tertiary, #888);
    margin: 0;
    flex: 1 1 180px;
}

/* --- Lista de compassos: fluem em linha e quebram pra baixo a cada 4,
   como sistemas de uma partitura. --- */
.estudio-sections {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.75rem;
    align-items: start;
}

.estudio-bar {
    border: var(--line-width) solid var(--border-color);
    border-radius: 8px;
    padding: 0.6rem;
    background: var(--bg-secondary);
    min-width: 0;
}
.estudio-bar.is-dragging { opacity: 0.4; }

/* Indicador de soltura estilo Notion: linha vertical na calha entre cards. */
.estudio-drop-indicator {
    position: absolute;
    width: 3px;
    margin-left: -1.5px;
    border-radius: 2px;
    background: var(--link-color);
    box-shadow: 0 0 6px color-mix(in srgb, var(--link-color) 55%, transparent);
    opacity: 0;
    pointer-events: none;
    z-index: 6;
    transition: opacity 0.1s ease, left 0.08s ease, top 0.08s ease, height 0.08s ease;
}
.estudio-drop-indicator.is-visible { opacity: 1; }

/* Alça de arraste (reordenar compassos) */
.estudio-drag-handle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 32px;
    flex: 0 0 auto;
    color: var(--text-tertiary, #888);
    background: transparent;
    border: none;
    padding: 0;
    cursor: grab;
    touch-action: none;
}
.estudio-drag-handle:hover { color: var(--text-primary); }
.estudio-drag-handle:active { cursor: grabbing; }
.estudio-drag-handle svg { width: 16px; height: 16px; }
.estudio-drag-handle:focus-visible { outline: 2px solid var(--link-color); outline-offset: 2px; border-radius: 4px; }

.estudio-bar__head {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.55rem;
    flex-wrap: wrap;
}
.estudio-bar__name {
    flex: 1 1 120px;
    min-width: 0;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: var(--line-width) solid var(--border-color);
    border-radius: 6px;
    padding: 0.3rem 0.5rem;
}
.estudio-bar__name:focus { outline: none; border-color: var(--text-primary); }

.estudio-bar__repeat {
    display: inline-flex;
    align-items: center;
    gap: 0.15rem;
}
.estudio-bar__repeat-x { color: var(--text-tertiary, #888); font-size: 0.85rem; }
.estudio-bar__repeat-input {
    width: 3.2rem;
    font: inherit;
    font-size: 0.85rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: var(--line-width) solid var(--border-color);
    border-radius: 6px;
    padding: 0.3rem 0.4rem;
    text-align: center;
}
.estudio-bar__repeat-input:focus { outline: none; border-color: var(--text-primary); }

.estudio-bar__ops {
    display: inline-flex;
    gap: 0.25rem;
    margin-left: auto;
}
.estudio-op {
    width: 32px; height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: var(--line-width) solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.15s ease, opacity 0.15s ease;
}
.estudio-op svg { width: 100%; height: 100%; }
.estudio-op:hover:not(:disabled) { border-color: var(--text-primary); }
.estudio-op:disabled { opacity: 0.35; cursor: default; }
.estudio-op:focus-visible { outline: 2px solid var(--link-color); outline-offset: 2px; }

/* --- Grade --- */
.estudio-grid {
    display: flex;
    flex-direction: column;
    gap: 4px;
    --lane-w: 68px;
    --steps: 8; /* 8 colcheias por padrão; 16 (semicolcheias) nas viradas */
}
.estudio-grid__row {
    display: grid;
    grid-template-columns: var(--lane-w) repeat(var(--steps, 8), minmax(0, 1fr));
    gap: 4px;
    align-items: stretch;
}
.estudio-grid__row--head { margin-bottom: 2px; }

/* Compasso em semicolcheias (16) ocupa a linha inteira: mais espaço pra grade fina */
.estudio-bar.is-16 { grid-column: 1 / -1; }

/* Botão de subdivisão do compasso (1/8 ↔ 1/16) */
.estudio-bar__res {
    font: inherit;
    font-size: 0.72rem;
    font-variant-numeric: tabular-nums;
    min-width: 34px;
    height: 32px;
    padding: 0 0.4rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: var(--line-width) solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}
.estudio-bar__res:hover { border-color: var(--text-primary); }
.estudio-bar__res[aria-pressed="true"] {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}
.estudio-bar__res:focus-visible { outline: 2px solid var(--link-color); outline-offset: 2px; }

.estudio-grid__lane-label {
    font-size: 0.72rem;
    color: var(--text-secondary, #aaa);
    display: flex;
    align-items: center;
    padding-right: 0.35rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.estudio-grid__step-label {
    font-size: 0.68rem;
    color: var(--text-tertiary, #888);
    text-align: center;
}
.estudio-grid__step-label.is-downbeat { color: var(--text-primary); font-weight: 600; }

.estudio-cell {
    appearance: none;
    min-height: 34px;
    border: var(--line-width) solid var(--border-color);
    border-radius: 5px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.7rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background 0.1s ease, border-color 0.1s ease;
}
.estudio-cell.is-downbeat { border-left-width: 2px; border-left-color: var(--text-tertiary, #888); }
.estudio-cell:hover { border-color: var(--text-primary); }
.estudio-cell.is-on {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}
.estudio-cell:focus-visible { outline: 2px solid var(--link-color); outline-offset: 1px; }

/* --- Rodapé do editor --- */
.estudio-editor__actions {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 0.9rem;
}
.estudio-palette { display: flex; flex-direction: column; gap: 0.2rem; }
.estudio-palette__label { font-size: 0.72rem; color: var(--text-tertiary, #888); }
.estudio-select {
    font: inherit;
    font-size: 0.85rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: var(--line-width) solid var(--border-color);
    border-radius: 8px;
    padding: 0.4rem 0.6rem;
    max-width: 240px;
}
.estudio-select:focus { outline: none; border-color: var(--text-primary); }

/* --- Painel de código (colapsável, embaixo) --- */
.estudio-codedetails__summary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 0.9rem;
    cursor: pointer;
    list-style: none;
    font-weight: 600;
    color: var(--text-primary);
    -webkit-tap-highlight-color: transparent;
}
.estudio-codedetails__summary::-webkit-details-marker { display: none; }
.estudio-codedetails__summary:focus-visible { outline: 2px solid var(--link-color); outline-offset: -2px; border-radius: 10px; }
.estudio-codedetails__chev {
    display: inline-flex;
    color: var(--text-tertiary, #888);
    transition: transform 0.15s ease;
}
.estudio-codedetails[open] .estudio-codedetails__chev { transform: rotate(90deg); }
.estudio-codedetails__title { font-size: 1rem; }
.estudio-codedetails__meta {
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--text-tertiary, #888);
    margin-left: auto;
}
.estudio-codedetails__body {
    padding: 0 0.9rem 0.9rem;
    border-top: var(--line-width) solid var(--border-color);
}
.estudio-codedetails__body .estudio-panel__head { margin: 0.75rem 0 0.6rem; }

.estudio-codepanel__hint {
    font-size: 0.78rem;
    color: var(--text-tertiary, #888);
    margin: 0;
    flex: 1 1 180px;
}
.estudio-code {
    margin: 0;
    max-height: 460px;
    overflow: auto;
    background: var(--bg-secondary);
    border: var(--line-width) solid var(--border-color);
    border-radius: 8px;
    padding: 0.7rem 0.8rem;
}
.estudio-code code {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--text-primary);
    white-space: pre;
}
.estudio-copy__label { font-size: 0.8rem; }

/* --- Responsivo: 4 compassos por linha no desktop, degradando por largura --- */
@media (max-width: 1100px) {
    .estudio-sections { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
    .estudio-sections { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .estudio-code { max-height: 320px; }
    .estudio-codedetails__meta { display: none; }
}
@media (max-width: 560px) {
    .estudio-sections { grid-template-columns: 1fr; }
    .estudio-grid { --lane-w: 52px; }
    .estudio-grid__lane-label { font-size: 0.66rem; }
    .estudio-cell { min-height: 40px; font-size: 0.66rem; }
    .estudio-topbar__controls { width: 100%; justify-content: space-between; }
}