/* ═══════════════════════════════════════════════════
   EXERCÍCIOS — Estilos compartilhados
   (arrastar e soltar + múltipla escolha)
   ═══════════════════════════════════════════════════ */

/* Card base */
.exercise-card { border-top-color: #00695c !important; }
.exercise-card > h2 { color: #00695c !important; }

/* Botões */
.btn-verificar {
    padding: 10px 24px;
    background: #00695c;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.95em;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
}
.btn-verificar:hover { background: #00796b; transform: translateY(-1px); }

.btn-refazer {
    padding: 10px 20px;
    background: white;
    color: #718096;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 0.9em;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
}
.btn-refazer:hover { border-color: #94a3b8; color: #4a5568; }

.ex-actions { margin-top: 18px; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

/* Resultado */
.ex-result {
    margin-top: 14px;
    padding: 14px 18px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95em;
    display: none;
    line-height: 1.5;
}
.ex-result.visible { display: block; }
.ex-result.success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.ex-result.partial { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.ex-result.zero    { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* ═══════════════════════════════
   ARRASTAR E SOLTAR
   ═══════════════════════════════ */

.ex-drag {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0;
}

.ex-col-title {
    font-size: 0.75em;
    font-weight: 700;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

/* Pool de itens */
.ex-pool { display: flex; flex-direction: column; gap: 8px; }

.drag-chip {
    background: #dbeafe;
    border: 2px solid #93c5fd;
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 0.88em;
    cursor: grab;
    user-select: none;
    transition: all 0.2s;
    color: #1e3a5f;
    line-height: 1.4;
}
.drag-chip:hover:not(.placed):not(.selected) { background: #bfdbfe; border-color: #60a5fa; }
.drag-chip.dragging { opacity: 0.35; cursor: grabbing; }
.drag-chip.selected { background: #1d4ed8; color: white; border-color: #1e40af; cursor: pointer; }
.drag-chip.placed   { opacity: 0.28; pointer-events: none; text-decoration: line-through; }

/* Zonas de drop */
.ex-zones { display: flex; flex-direction: column; gap: 8px; }

.drop-zone {
    border: 2px dashed #cbd5e1;
    border-radius: 8px;
    padding: 8px 12px;
    min-height: 56px;
    background: #f8fafc;
    transition: all 0.2s;
    cursor: pointer;
}
.drop-zone.over      { background: #dbeafe; border-color: #3b82f6; border-style: solid; }
.drop-zone.correct   { border-color: #16a34a; background: #f0fdf4; border-style: solid; }
.drop-zone.incorrect { border-color: #dc2626; background: #fef2f2; border-style: solid; }

.zone-name {
    font-size: 0.74em;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block;
    margin-bottom: 5px;
}

.zone-slot { min-height: 22px; }

.placed-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: #1d4ed8;
    color: white;
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 0.85em;
    cursor: pointer;
    line-height: 1.4;
    transition: background 0.2s;
}
.placed-chip:hover { background: #1e40af; }
.placed-chip::after { content: " ✕"; opacity: 0.65; font-size: 0.8em; }

.zone-feedback {
    font-size: 0.78em;
    font-weight: 600;
    margin-top: 5px;
}
.zone-feedback.ok  { color: #16a34a; }
.zone-feedback.err { color: #dc2626; }

/* ═══════════════════════════════
   MÚLTIPLA ESCOLHA
   ═══════════════════════════════ */

.mc-question { margin-bottom: 22px; }
.mc-question:last-of-type { margin-bottom: 0; }

.mc-q-text {
    font-weight: 600;
    margin-bottom: 10px;
    color: #1a202c;
    font-size: 0.95em;
    line-height: 1.5;
}

.mc-options { display: flex; flex-direction: column; gap: 7px; }

.mc-option {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 8px;
    border: 2px solid #e2e8f0;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.2s;
    background: #f8fafc;
    user-select: none;
    line-height: 1.5;
}
.mc-option:hover:not(.locked) { border-color: #93c5fd; background: #eff6ff; }
.mc-option.selected  { border-color: #1565c0; background: #dbeafe; }
.mc-option.locked    { cursor: default; pointer-events: none; }
.mc-option.correct   { border-color: #16a34a !important; background: #f0fdf4 !important; }
.mc-option.incorrect { border-color: #dc2626 !important; background: #fef2f2 !important; }
.mc-option.reveal    { border-color: #16a34a !important; background: #dcfce7 !important; }

.mc-letter {
    font-weight: 700;
    color: #94a3b8;
    min-width: 18px;
    flex-shrink: 0;
    font-size: 0.88em;
}
.mc-option.selected  .mc-letter { color: #1565c0; }
.mc-option.correct   .mc-letter { color: #16a34a; }
.mc-option.incorrect .mc-letter { color: #dc2626; }
.mc-option.reveal    .mc-letter { color: #16a34a; }

.mc-explanation {
    font-size: 0.82em;
    margin-top: 8px;
    padding: 8px 12px;
    border-radius: 6px;
    display: none;
    line-height: 1.5;
}
.mc-explanation.visible { display: block; }
.mc-explanation.ok  { background: #dcfce7; color: #166534; }
.mc-explanation.err { background: #fee2e2; color: #991b1b; }

.mc-sep { border: none; border-top: 1px dashed #e2e8f0; margin: 20px 0; }

/* ═══════════════════════════════
   ATIVIDADE PRÁTICA
   ═══════════════════════════════ */

.practical-card { border-top-color: #6d28d9 !important; }
.practical-card > h2 { color: #6d28d9 !important; }

.prat-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}
.prat-tag {
    background: #ede9fe;
    color: #5b21b6;
    border-radius: 20px;
    padding: 3px 12px;
    font-size: 0.8em;
    font-weight: 600;
}

.prat-steps { display: flex; flex-direction: column; gap: 14px; margin-bottom: 18px; }

.prat-step {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}
.step-num {
    min-width: 30px;
    height: 30px;
    background: #6d28d9;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.88em;
    flex-shrink: 0;
    margin-top: 1px;
}
.step-body { flex: 1; line-height: 1.6; }
.step-label {
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 3px;
    font-size: 0.92em;
}
.step-desc { color: #475569; font-size: 0.9em; }

kbd {
    display: inline-block;
    background: #f1f5f9;
    border: 1px solid #94a3b8;
    border-bottom-width: 2px;
    border-radius: 4px;
    padding: 1px 7px;
    font-size: 0.82em;
    font-family: 'Consolas', 'Courier New', monospace;
    color: #1a202c;
    white-space: nowrap;
}

.prat-observe {
    background: #f5f3ff;
    border-left: 4px solid #6d28d9;
    border-radius: 0 8px 8px 0;
    padding: 12px 16px;
    font-size: 0.88em;
    color: #4c1d95;
    line-height: 1.6;
    margin-bottom: 16px;
}

.btn-print {
    padding: 10px 20px;
    background: white;
    color: #6d28d9;
    border: 2px solid #6d28d9;
    border-radius: 8px;
    font-size: 0.9em;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
}
.btn-print:hover { background: #6d28d9; color: white; }

/* ═══════════════════════════════
   DARK MODE
   ═══════════════════════════════ */
body.dark-mode .exercise-card { background: #1e293b; }
body.dark-mode .drag-chip { background: #1e3a5f; border-color: #3b5998; color: #bfdbfe; }
body.dark-mode .drag-chip.selected { background: #1d4ed8; color: white; }
body.dark-mode .drop-zone { background: #0f172a; border-color: #334155; }
body.dark-mode .drop-zone.over { background: #1e3a5f; border-color: #60a5fa; }
body.dark-mode .zone-name { color: #94a3b8; }
body.dark-mode .mc-option { background: #0f172a; border-color: #334155; color: #e2e8f0; }
body.dark-mode .mc-option:hover:not(.locked) { background: #1e3a5f; border-color: #60a5fa; }
body.dark-mode .mc-option.selected { background: #1e3a5f; border-color: #60a5fa; }
body.dark-mode .mc-q-text { color: #e2e8f0; }
body.dark-mode .btn-refazer { background: #334155; border-color: #475569; color: #94a3b8; }
body.dark-mode .ex-col-title { color: #64748b; }
body.dark-mode .practical-card { background: #1e293b; }
body.dark-mode .prat-tag { background: #2e1065; color: #c4b5fd; }
body.dark-mode .step-label { color: #e2e8f0; }
body.dark-mode .step-desc { color: #94a3b8; }
body.dark-mode .prat-observe { background: #2e1065; color: #c4b5fd; border-color: #7c3aed; }
body.dark-mode kbd { background: #334155; border-color: #475569; color: #e2e8f0; }
body.dark-mode .btn-print { color: #a78bfa; border-color: #a78bfa; background: transparent; }
body.dark-mode .btn-print:hover { background: #6d28d9; color: white; border-color: #6d28d9; }

/* ═══════════════════════════════
   RESPONSIVO
   ═══════════════════════════════ */
@media (max-width: 600px) {
    .ex-drag { grid-template-columns: 1fr; }
}