/* ==========================================================================
   Maths app styles - Sotis AI design system
   --------------------------------------------------------------------------
   The shared "module page" components (violet header, list cards, filters,
   the .cell / .cell-type-badge framework, markdown rendering, nav, sync btn)
   live in core/css/module_system.css and are linked BEFORE this file.
   Here we keep only the maths-specific pieces: formula blocks, interactive
   plots and quizzes.
   ========================================================================== */

.maths-container {
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
    padding: var(--space-md);
    overflow-x: hidden;
}

/* ---- Content blocks living directly inside the notebook .cell ----
   .formula-block / .maths-viz / .maths-quiz are siblings of (or replace)
   .cell-content. The shared .cell has overflow:hidden and pads only
   .cell-content, so these blocks need their own inset to align with the
   padded content and not touch the card edges. */
.formula-block,
.maths-viz,
.maths-quiz {
    margin-left: var(--space-md);
    margin-right: var(--space-md);
    margin-bottom: var(--space-md);
}

/* ---- Formula block ---- */
.formula-block {
    margin-top: var(--space-md);
    color: var(--text-primary);
    line-height: 1.6;
    background: rgba(247, 230, 77, 0.08);
    border-left: 3px solid var(--yellow-primary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 1.05rem;
}

/* ---- Interactive visualization ---- */
.maths-viz {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
    margin-top: var(--space-sm);
}

.viz-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

.viz-controls label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.viz-select {
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--input-bg, var(--card-bg));
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
}

.viz-select:focus {
    outline: none;
    border-color: var(--violet-dark);
}

.viz-vs {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-style: italic;
}

.viz-plot {
    width: 100%;
    min-height: 360px;
}

.viz-data { display: none; }

/* ---- Quiz ---- */
.maths-quiz {
    margin-top: var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.quiz-data { display: none; }

.quiz-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
}

.quiz-question {
    font-weight: 600;
    margin: 0 0 var(--space-xs) 0;
    color: var(--text-primary);
}

.quiz-choices {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.quiz-choice {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--card-bg);
    color: var(--text-primary);
    font: inherit;
    text-align: left;
    width: 100%;
    cursor: pointer;
    transition: var(--transition-fast);
}

.quiz-choice:hover {
    border-color: var(--violet-dark);
}

.quiz-choice.correct {
    background: rgba(76, 175, 80, 0.15);
    border-color: #4caf50;
    color: #4caf50;
}

.quiz-choice.wrong {
    background: rgba(244, 67, 54, 0.12);
    border-color: #f44336;
    color: #f44336;
}

.quiz-choice.disabled {
    cursor: default;
    opacity: 0.85;
}

.quiz-explanation {
    margin-top: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: var(--violet-light);
    color: var(--dark-text);
    border-left: 3px solid var(--violet-dark);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    display: none;
}

.quiz-explanation.visible { display: block; }

/* ---- Locked section (maths simple variant) ---- */
.cell-locked {
    border-style: dashed;
    text-align: center;
}

.locked-content {
    padding: var(--space-md);
}

.locked-message h3 {
    color: var(--violet-dark);
    margin: 0 0 var(--space-xs) 0;
}

.locked-actions {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-sm);
}

.btn-unlock {
    background: var(--violet-dark);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
}

.btn-unlock:hover { background: var(--violet-primary); }

.or-separator { color: var(--text-secondary); }

.btn-register-link {
    color: var(--violet-dark);
    text-decoration: underline;
}

/* ---- Responsive ---- */
@media (max-width: 600px) {
    .viz-controls { flex-direction: column; align-items: flex-start; }
    .viz-plot { min-height: 280px; }
}