/* ============================================
   Mind-Blowing Learning Content Blocks
   Concept cards, diagrams, tables, charts, code sim, challenges
   Programiz/Codecademy-style learner content standards
   ============================================ */

/* Learning Roadmap: unlock animation, glow effect, celebration */
@keyframes step-unlock {
    0% { transform: scale(0.8); opacity: 0; filter: blur(4px); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; filter: blur(0); }
}
@keyframes step-glow-pulse {
    0%, 100% { box-shadow: 0 0 8px rgba(34, 197, 94, 0.3), 0 0 16px rgba(34, 197, 94, 0.1); }
    50% { box-shadow: 0 0 16px rgba(34, 197, 94, 0.6), 0 0 32px rgba(34, 197, 94, 0.2), 0 0 48px rgba(34, 197, 94, 0.1); }
}
@keyframes milestone-achieved {
    0% { transform: scale(1); }
    30% { transform: scale(1.15); }
    60% { transform: scale(0.95); }
    100% { transform: scale(1); }
}
.step-unlocking {
    animation: step-unlock 0.6s ease-out forwards;
}
.step-glow {
    animation: step-glow-pulse 2s ease-in-out infinite;
}
.step-glow-completed {
    box-shadow: 0 0 12px rgba(34, 197, 94, 0.4), 0 0 24px rgba(34, 197, 94, 0.15);
    border-color: rgba(34, 197, 94, 0.6) !important;
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.step-completed-icon {
    animation: milestone-achieved 0.5s ease-out;
}
/* Step unlock shimmer line */
.step-unlock-line {
    height: 3px; border-radius: 999px;
    background: linear-gradient(90deg, transparent, #22c55e, transparent);
    animation: shimmer 1.5s ease-in-out infinite;
    background-size: 200% 100%;
}
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}
/* Topic card glowing border when all steps completed */
.topic-card-complete-glow {
    border-color: #22c55e !important;
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.25), 0 0 40px rgba(34, 197, 94, 0.1);
    transition: box-shadow 0.5s ease, border-color 0.3s ease;
}

/* Content area: reading width & typography (learner platforms standard) */
#player-content-body.lesson-content-markdown,
#player-content-body.lesson-body {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 1rem 2rem;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-dark, #1e293b);
}
[data-theme="dark"] #player-content-body.lesson-content-markdown,
[data-theme="dark"] #player-content-body.lesson-body {
    color: var(--text-main, #e2e8f0);
}

/* Code block language badge (Programiz/Codecademy style) */
.code-lang-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: linear-gradient(135deg, #1e293b, #334155);
    color: #94a3b8;
    margin-right: 0.5rem;
}
[data-theme="dark"] .code-lang-badge {
    background: linear-gradient(135deg, #334155, #475569);
    color: #cbd5e1;
}

/* Structured code sections (studio blocks) – same visual standard as markdown code */
.structured-code {
    margin: 1.25rem 0;
}
.structured-code h3 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
    color: var(--text-gray);
}
.structured-code pre {
    margin: 0;
}
.structured-code .output-block {
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-gray);
    border-radius: 8px;
    font-size: 0.9rem;
    border-left: 4px solid var(--primary-green);
}

.lc-block {
    margin-bottom: 2rem;
    animation: lc-fadeIn 0.45s ease backwards;
}

[data-animate="fade-in"] { animation-delay: 0.05s; }

@keyframes lc-fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Concept Snapshot Card */
.lc-concept-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 1.5rem 1.75rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-orange);
}

.lc-concept-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.lc-concept-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(249,115,22,0.15), rgba(249,115,22,0.08));
    color: var(--primary-orange);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
}

.lc-concept-title {
    font-size: 1.35rem;
    font-weight: 800;
    margin: 0;
    color: var(--text-dark);
}

.lc-concept-core {
    font-size: 1.05rem;
    color: var(--text-dark);
    margin: 0 0 1rem;
    line-height: 1.55;
    font-weight: 500;
}

.lc-concept-box {
    margin-bottom: 1rem;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    background: var(--bg-gray);
    border: 1px solid var(--border-color);
}

.lc-concept-box.lc-mental-model { border-left: 3px solid var(--primary-purple); }
.lc-concept-box.lc-analogy { border-left: 3px solid var(--primary-green); }

.lc-concept-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-gray);
    margin-bottom: 0.35rem;
}

.lc-concept-box p, .lc-concept-used p { margin: 0; font-size: 0.95rem; }

.lc-concept-used { margin-bottom: 1rem; }

.lc-tag-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.lc-tag-list li { margin: 0; }
.lc-tag {
    display: inline-block;
    padding: 0.3rem 0.65rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    background: rgba(249,115,22,0.12);
    color: var(--primary-orange);
}

.lc-keywords { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.lc-keyword-pill {
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    background: var(--bg-gray);
    color: var(--text-gray);
    border: 1px solid var(--border-color);
}

/* Diagram Section – beautiful icon & gradient */
.lc-diagram-section {
    background: var(--bg-card);
    border-radius: 14px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-left: 4px solid #0ea5e9;
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.1);
    animation: lc-fadeIn 0.5s ease backwards;
}
.lc-diagram-caption {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.15rem;
    font-weight: 800;
    margin: 0 0 1rem;
    color: var(--text-dark);
}
.lc-diagram-caption i,
.lc-diagram-caption .lc-diagram-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0ea5e9, #06b6d4);
    color: #fff;
    font-size: 1.35rem;
    box-shadow: 0 4px 16px rgba(14, 165, 233, 0.45);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.lc-diagram-caption .lc-diagram-icon i { color: #fff; margin: 0; }
.lc-diagram-caption:hover i,
.lc-diagram-caption:hover .lc-diagram-icon {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
}
.lc-mermaid-wrap { margin: 1rem 0; text-align: center; overflow-x: auto; }
.lc-mermaid { margin: 0; font-size: 0.9rem; }
.lc-diagram-steps { margin: 1rem 0 0; padding-left: 1.5rem; font-size: 0.95rem; color: var(--text-gray); }
.lc-diagram-steps li { margin: 0.35rem 0; }

/* Comparison Table – icon & shadow */
.lc-comparison-table {
    background: var(--bg-card);
    border-radius: 14px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-left: 4px solid #06b6d4;
    box-shadow: 0 4px 16px rgba(6, 182, 212, 0.08);
    animation: lc-fadeIn 0.5s ease backwards;
}
.lc-table-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
    font-weight: 800;
}
.lc-table-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #06b6d4, #22d3ee);
    color: #fff;
    font-size: 1.1rem;
    box-shadow: 0 3px 12px rgba(6, 182, 212, 0.4);
    transition: transform 0.25s ease;
}
.lc-comparison-table:hover .lc-table-icon {
    transform: scale(1.05);
}
.lc-table-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 1rem;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.lc-table-title::before {
    content: "";
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: linear-gradient(135deg, #06b6d4, #22d3ee);
    display: inline-block;
    flex-shrink: 0;
}
.lc-table-scroll { overflow-x: auto; margin-bottom: 1rem; }
.lc-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; min-width: 400px; }
.lc-table th, .lc-table td { border: 1px solid var(--border-color); padding: 0.65rem 1rem; text-align: left; }
.lc-table th { background: linear-gradient(180deg, var(--bg-gray) 0%, var(--bg-card) 100%); font-weight: 700; color: var(--text-dark); }
.lc-table tr:nth-child(even) { background: rgba(0,0,0,0.02); }
[data-theme="dark"] .lc-table tr:nth-child(even) { background: rgba(255,255,255,0.04); }
.lc-cell-feature { font-weight: 600; color: var(--text-dark); }
.lc-when-to-use { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border-color); }
.lc-when-to-use ul { margin: 0.35rem 0 0; padding-left: 1.25rem; }

/* Chart Section */
.lc-chart-section { background: var(--bg-card); border-radius: var(--radius-lg); padding: 1.25rem; border: 1px solid var(--border-color); }
.lc-chart-title { font-size: 1.1rem; font-weight: 700; margin: 0 0 1rem; color: var(--text-dark); }
.lc-chart-canvas-wrap { position: relative; width: 100%; max-width: 500px; margin: 0 auto; }

/* Code Simulation */
.lc-code-simulation { background: var(--bg-card); border-radius: var(--radius-lg); padding: 1.25rem; border: 1px solid var(--border-color); }
.lc-code-title { font-size: 1.1rem; font-weight: 700; margin: 0 0 0.75rem; color: var(--text-dark); }
.lc-code-toolbar { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 0.75rem; }
.lc-btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.45rem 0.85rem; border-radius: var(--radius-md); font-size: 0.85rem; font-weight: 600;
    border: 1px solid var(--border-color); background: var(--bg-gray); color: var(--text-dark);
    cursor: pointer; text-decoration: none; transition: all 0.2s;
}
.lc-btn:hover { background: var(--border-color); }
.lc-btn-run { background: linear-gradient(135deg, var(--primary-green), #16a34a); color: #fff; border-color: #15803d; }
.lc-btn-run:hover { opacity: 0.95; color: #fff; }
.lc-code-block { margin: 0; padding: 1rem; background: #1e293b; border-radius: var(--radius-md); overflow-x: auto; font-size: 0.9rem; line-height: 1.5; }
.lc-code-block code { color: #e2e8f0; }
.lc-code-steps { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border-color); }
.lc-code-step { margin: 0.35rem 0; }
.lc-code-step.active { background: rgba(249,115,22,0.1); padding: 0.35rem 0.5rem; border-radius: var(--radius-sm); border-left: 3px solid var(--primary-orange); }
.lc-vars { font-size: 0.85rem; color: var(--text-gray); margin-left: 0.5rem; }
.lc-code-output { margin-top: 1rem; }
.lc-code-output pre { margin: 0.35rem 0 0; padding: 0.75rem; background: var(--bg-gray); border-radius: var(--radius-md); font-size: 0.85rem; overflow-x: auto; }

/* Challenge Card */
.lc-challenge-card {
    background: linear-gradient(135deg, rgba(249,115,22,0.06) 0%, var(--bg-card) 100%);
    border-radius: var(--radius-xl);
    padding: 1.5rem 1.75rem;
    border: 2px solid var(--primary-orange);
    box-shadow: var(--shadow-md);
}

.lc-challenge-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; flex-wrap: wrap; }
.lc-challenge-xp { font-size: 0.9rem; font-weight: 700; color: var(--primary-gold); }
.lc-challenge-title { font-size: 1.2rem; font-weight: 800; margin: 0; color: var(--text-dark); }
.lc-challenge-question { font-size: 1rem; margin-bottom: 1rem; line-height: 1.6; color: var(--text-dark); }
.lc-challenge-question pre { background: var(--bg-gray); padding: 0.75rem; border-radius: var(--radius-md); margin: 0.5rem 0; overflow-x: auto; font-size: 0.9rem; }
.lc-challenge-options { list-style: none; margin: 0 0 1rem; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.lc-option-btn {
    display: block; width: 100%; text-align: left; padding: 0.75rem 1rem;
    border: 2px solid var(--border-color); border-radius: var(--radius-md);
    background: var(--bg-card); color: var(--text-dark); font-size: 0.95rem; cursor: pointer;
    transition: all 0.2s;
}
.lc-option-btn:hover { border-color: var(--primary-orange); background: rgba(249,115,22,0.06); }
.lc-option-btn.correct { border-color: var(--primary-green); background: rgba(34,197,94,0.1); color: var(--primary-green); }
.lc-option-btn.incorrect { border-color: var(--primary-red); background: rgba(239,68,68,0.08); color: var(--primary-red); }
.lc-option-btn.disabled { pointer-events: none; opacity: 0.7; }
.lc-challenge-hints { margin-top: 1rem; }
.lc-hint-reveal { padding: 0.4rem 0.75rem; font-size: 0.85rem; color: var(--primary-orange); background: transparent; border: 1px solid var(--primary-orange); border-radius: var(--radius-md); cursor: pointer; }
.lc-hint-content { margin-top: 0.5rem; padding: 0.75rem; background: var(--bg-gray); border-radius: var(--radius-md); font-size: 0.9rem; color: var(--text-gray); }
.lc-challenge-feedback { margin-top: 1rem; padding: 0.75rem; border-radius: var(--radius-md); font-weight: 600; }
.lc-challenge-feedback.success { background: rgba(34,197,94,0.15); color: var(--primary-green); }
.lc-challenge-feedback.error { background: rgba(239,68,68,0.1); color: var(--primary-red); }
.lc-challenge-explanation { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border-color); }
.lc-challenge-explanation p { margin: 0.35rem 0 0; font-size: 0.95rem; }

/* Knowledge Graph */
.lc-knowledge-graph { background: var(--bg-card); border-radius: var(--radius-lg); padding: 1.25rem; border: 1px solid var(--border-color); }
.lc-kg-title { font-size: 1.1rem; font-weight: 700; margin: 0 0 1rem; color: var(--text-dark); }
.lc-kg-lists { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1.25rem; margin-top: 1rem; }
.lc-kg-group ul { margin: 0.35rem 0 0; padding-left: 1.25rem; }
.lc-kg-group a { color: var(--primary-orange); font-weight: 600; }

/* Animation Block */
.lc-animation-block { background: var(--bg-card); border-radius: var(--radius-lg); padding: 1.25rem; border: 1px solid var(--border-color); }
.lc-animation-desc { margin: 0 0 1rem; font-size: 0.95rem; color: var(--text-gray); }
.lc-animation-svg-wrap { margin: 1rem 0; text-align: center; }
.lc-animation-svg-wrap svg { max-width: 100%; height: auto; }
.lc-animation-placeholder { text-align: center; padding: 2rem; border: 2px dashed var(--border-color); border-radius: var(--radius-md); }

/* Key concepts (Concept Memory Engine) */
.player-key-concepts-wrap {
    margin-bottom: 1.25rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.06), rgba(139, 92, 246, 0.06));
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-orange);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.player-key-concepts-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: background 0.2s;
}
.player-key-concepts-toggle:hover { background: rgba(249, 115, 22, 0.12); }
[data-theme="dark"] .player-key-concepts-toggle { color: var(--text-main); }
.player-key-concepts-toggle i { color: var(--primary-orange); }
#player-key-concepts-count { font-weight: 500; color: var(--text-gray); font-size: 0.85rem; }
.player-key-concepts-list {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.player-concept-chip {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    color: var(--text-dark);
}
[data-theme="dark"] .player-concept-chip { color: var(--text-main); }