/* ========================================
   COMPACT THEORY LAYOUT OPTIMIZATION
   Keeps beautiful accordion design, reduces spacing
   ======================================== */

/* Single-column accordion - keep original beautiful design */
#module-content-container .accordion {
    max-width: 900px;
    margin: 0 auto 1.5rem auto;
}

/* Accordion items - slightly more compact */
#module-content-container .accordion-item {
    margin-bottom: 0.875rem;
}

/* Compact accordion headers - keep beautiful gradient */
#module-content-container .accordion-header {
    padding: 1rem 1.25rem;
    font-size: 1rem;
}

/* Compact accordion bodies */
#module-content-container .accordion-body {
    padding: 1.25rem;
}

/* Compact theory boxes - keep beautiful styling */
#module-content-container .theory-box,
#module-content-container .theory-content-enhanced .theory-box {
    padding: 1rem 1.25rem;
    margin: 0.875rem 0;
}

/* Keep headings readable, just slightly tighter spacing */
#module-content-container .theory-content-enhanced h3 {
    margin-top: 1.25rem;
    margin-bottom: 0.875rem;
}

#module-content-container .theory-content-enhanced h4 {
    margin: 1rem 0 0.625rem 0;
}

#module-content-container .theory-content-enhanced h5 {
    margin: 0.875rem 0 0.5rem 0;
}

/* Keep example boxes beautiful, slightly tighter */
#module-content-container .theory-content-enhanced .example-box,
#module-content-container .theory-content-enhanced .simple-explanation {
    padding: 0.875rem 1rem;
    margin: 0.875rem 0;
}

/* Tables - keep readable */
#module-content-container .rubric-table {
    margin: 0.875rem 0;
}

#module-content-container .rubric-table th,
#module-content-container .rubric-table td {
    padding: 0.625rem 0.75rem;
}

/* Lists - keep readable */
#module-content-container .theory-content-enhanced ul,
#module-content-container .theory-content-enhanced ol {
    margin: 0.75rem 0;
}

#module-content-container .theory-content-enhanced ul li,
#module-content-container .theory-content-enhanced ol li {
    margin-bottom: 0.5rem;
}

/* Paragraphs - tighter spacing */
#module-content-container .theory-content-enhanced p {
    margin-bottom: 0.875rem;
}

/* Reduce excessive spacing slightly */
#module-content-container .theory-content-enhanced .breathing-space {
    height: 1.25rem;
}

#module-content-container .theory-content-enhanced .visual-break {
    margin: 1.25rem 0;
}

/* Expand buttons */
#module-content-container .theory-content-enhanced .expand-btn {
    padding: 0.625rem 1rem;
    margin: 0.75rem 0;
}

/* Expandable details */
#module-content-container .theory-content-enhanced .expandable-detail {
    padding: 1rem;
    margin-top: 0.75rem;
}

/* Mobile optimization */
@media (max-width: 768px) {
    #module-content-container .accordion {
        max-width: 100%;
    }

    #module-content-container .accordion-header {
        padding: 0.875rem 1rem;
        font-size: 0.95rem;
    }

    #module-content-container .accordion-body {
        padding: 1rem;
    }

    #module-content-container .theory-box {
        padding: 0.875rem 1rem;
    }
}

/* Alternative Compact View: Tabbed Interface */
.theory-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 0.5rem;
}

.theory-tab-btn {
    padding: 0.5rem 1rem;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem 0.5rem 0 0;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    color: #6b7280;
    transition: all 0.2s ease;
}

.theory-tab-btn:hover {
    background: #f3f4f6;
    color: #374151;
}

.theory-tab-btn.active {
    background: #6366f1;
    color: white;
    border-color: #6366f1;
}

.theory-tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.theory-tab-content.active {
    display: block;
}

/* Compact summary view */
.theory-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.theory-summary-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 1px solid #bae6fd;
    border-radius: 0.75rem;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theory-summary-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
    border-color: #6366f1;
}

.theory-summary-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1e40af;
    margin-bottom: 0.5rem;
}

.theory-summary-preview {
    font-size: 0.825rem;
    color: #475569;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Quick navigation sidebar */
.theory-quick-nav {
    position: sticky;
    top: 80px;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    padding: 1rem;
    margin-left: 1rem;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    scrollbar-width: thin;
}

.theory-quick-nav h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: #374151;
    margin: 0 0 0.75rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e5e7eb;
}

.theory-quick-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.theory-quick-nav li {
    margin-bottom: 0.5rem;
}

.theory-quick-nav a {
    display: block;
    padding: 0.375rem 0.625rem;
    font-size: 0.825rem;
    color: #6b7280;
    text-decoration: none;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
}

.theory-quick-nav a:hover {
    background: #f3f4f6;
    color: #6366f1;
    padding-left: 0.875rem;
}

.theory-quick-nav a.active {
    background: #eef2ff;
    color: #6366f1;
    font-weight: 600;
}

/* Two-column layout with sidebar */
.theory-layout-with-nav {
    display: grid;
    grid-template-columns: 1fr 200px;
    gap: 1.5rem;
}

@media (max-width: 992px) {
    .theory-layout-with-nav {
        grid-template-columns: 1fr;
    }

    .theory-quick-nav {
        position: static;
        margin-left: 0;
        margin-bottom: 1rem;
    }
}

/* Collapsible sections with compact preview */
.theory-section-compact {
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: all 0.2s ease;
}

.theory-section-compact:hover {
    border-color: #cbd5e1;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.theory-section-header-compact {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: #f9fafb;
    cursor: pointer;
    user-select: none;
}

.theory-section-header-compact h4 {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: #374151;
}

.theory-section-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6b7280;
    font-weight: bold;
    transition: transform 0.2s ease;
}

.theory-section-compact.expanded .theory-section-toggle {
    transform: rotate(180deg);
}

.theory-section-content-compact {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.theory-section-compact.expanded .theory-section-content-compact {
    max-height: 500px;
    overflow-y: auto;
}

.theory-section-body-compact {
    padding: 1rem;
}

/* ========================================
   Core Theory Page Styling (matches visual reference)
   ======================================== */
.theory-core {
    max-width: 900px;
    margin: 0 auto;
}

.theory-core-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}

.theory-core-accent {
    width: 6px;
    height: 48px;
    border-radius: 999px;
    background: linear-gradient(135deg, #4f46e5, #6366f1);
}

.theory-core-subtitle {
    color: #475569;
    margin: 4px 0 0 0;
    font-weight: 500;
}

.theory-tip-card {
    background: #fef3c7;
    border: 2px solid #f59e0b;
    border-radius: 14px;
    padding: 14px 18px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
    box-shadow: 0 8px 20px rgba(247, 161, 10, 0.15);
    margin-bottom: 20px;
}

.theory-tip-title {
    font-weight: 700;
    color: #92400e;
}

.theory-tip-content p {
    margin: 4px 0 0 0;
    color: #92400e;
    line-height: 1.6;
}

.core-accordion {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.core-accordion-item {
    background: transparent;
    border: none;
    box-shadow: none;
}

.core-accordion-header {
    margin: 0;
    border-radius: 16px;
    padding: 16px 20px;
    font-size: 1.05rem;
    box-shadow: 0 10px 24px rgba(79, 70, 229, 0.2);
}

.core-accordion-header .accordion-title {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.core-accordion-header .chevron {
    transition: transform 0.2s ease;
}

.core-accordion-header[aria-expanded="true"] .chevron {
    transform: rotate(180deg);
}

.core-accordion-body {
    margin: 8px 0 0 0;
    border-radius: 14px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.08);
}

.core-accordion-body .core-lead {
    font-weight: 600;
    color: #0f172a;
    margin-bottom: 12px;
}

.core-points {
    margin: 0 0 14px 0;
    padding-left: 18px;
    color: #475569;
    line-height: 1.6;
}

.core-points li {
    margin-bottom: 6px;
}

.learn-more-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: #eef2ff;
    border: 1px solid #c7d2fe;
    border-radius: 12px;
    color: #4338ca;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.learn-more-toggle:hover {
    background: #e0e7ff;
    box-shadow: 0 6px 12px rgba(67, 56, 202, 0.15);
}

.learn-more-panel {
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    background: #eef2ff;
    border: 1px solid #c7d2fe;
    color: #312e81;
    line-height: 1.7;
}

.learn-more-panel[hidden] {
    display: none;
}

@media (max-width: 768px) {
    .theory-core {
        max-width: 100%;
    }

    .theory-core-header {
        align-items: flex-start;
    }

    .core-accordion-header {
        padding: 14px 16px;
        font-size: 1rem;
    }
}

/* Theory controls and progress */
.theory-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 18px 0;
}

.theory-progress {
    font-weight: 600;
    color: #4338ca;
}

.theory-continue-row {
    margin-top: 16px;
    display: flex;
    justify-content: flex-end;
}

.theory-continue-btn {
    font-weight: 700;
}