/**
 * 📚🎓 LEARNING MODULE v2.0 — Radim Branding CSS
 * Unified Lessons + Courses
 */

/* ================================================================
   TABS
   ================================================================ */
.learn-tabs {
    display: flex;
    gap: 4px;
    background: rgba(91, 168, 160, 0.1);
    border-radius: 14px;
    padding: 4px;
    margin-bottom: 20px;
}
.learn-tab {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 12px;
    background: transparent;
    color: #666;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}
.learn-tab.active {
    background: #5BA8A0;
    color: white;
    box-shadow: 0 2px 8px rgba(91, 168, 160, 0.3);
}
.learn-tab:hover:not(.active) {
    background: rgba(91, 168, 160, 0.15);
}

/* ================================================================
   HOME — Category Grid
   ================================================================ */
.learn-home {
    animation: learnFadeIn 0.3s ease;
}
@keyframes learnFadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.learn-cats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}
.learn-cat-card {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s;
    align-items: flex-start;
}
.learn-cat-card:hover {
    border-color: var(--cat-color, #5BA8A0);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}
.learn-cat-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}
.learn-cat-info {
    flex: 1;
    min-width: 0;
}
.learn-cat-info h4 {
    margin: 0 0 4px 0;
    font-size: 1.1rem;
    color: #2d3748;
}
.learn-cat-info p {
    margin: 0 0 10px 0;
    font-size: 0.85rem;
    color: #718096;
}
.learn-cat-meta {
    display: flex;
    gap: 12px;
    font-size: 0.8rem;
    color: #a0aec0;
}
.learn-cat-progress {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    color: #718096;
}
.learn-cat-bar {
    flex: 1;
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
}
.learn-cat-fill {
    height: 100%;
    background: var(--cat-color, #5BA8A0);
    border-radius: 3px;
    transition: width 0.5s;
}

/* ================================================================
   STATS BAR
   ================================================================ */
.learn-stats-bar {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 24px;
    padding: 20px;
    background: linear-gradient(135deg, #5BA8A0 0%, #4a9089 100%);
    border-radius: 16px;
    color: white;
}
.learn-stat {
    text-align: center;
}
.learn-stat-val {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
}
.learn-stat-lbl {
    font-size: 0.85rem;
    opacity: 0.85;
}

/* ================================================================
   BACK BUTTON
   ================================================================ */
.learn-back {
    background: none;
    border: none;
    color: #5BA8A0;
    cursor: pointer;
    font-size: 0.95rem;
    padding: 8px 0;
    margin-bottom: 16px;
    font-weight: 600;
}
.learn-back:hover { text-decoration: underline; }

/* ================================================================
   CATEGORY HEADER
   ================================================================ */
.learn-cat-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: linear-gradient(135deg, var(--cat-color, #5BA8A0), color-mix(in srgb, var(--cat-color, #5BA8A0), #000 20%));
    border-radius: 16px;
    color: white;
    margin-bottom: 24px;
}
.learn-cat-header-icon { font-size: 3rem; }
.learn-cat-header h2 { margin: 0 0 4px 0; }
.learn-cat-header p { margin: 0; opacity: 0.9; }

/* ================================================================
   LESSON LIST
   ================================================================ */
.learn-lessons-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.learn-lesson-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s;
}
.learn-lesson-card:hover {
    border-color: #5BA8A0;
    box-shadow: 0 4px 12px rgba(91, 168, 160, 0.12);
}
.learn-lesson-card.done {
    border-color: #48bb78;
    background: rgba(72, 187, 120, 0.05);
}
.learn-lesson-num {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--cat-color, #5BA8A0);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}
.learn-lesson-card.done .learn-lesson-num {
    background: #48bb78;
}
.learn-lesson-info {
    flex: 1;
    min-width: 0;
}
.learn-lesson-info h4 {
    margin: 0 0 4px 0;
    color: #2d3748;
}
.learn-lesson-meta {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: #a0aec0;
}
.learn-lesson-action {
    font-size: 1.3rem;
    flex-shrink: 0;
}

/* ================================================================
   STEP VIEW — Lesson progress
   ================================================================ */
.learn-step {
    max-width: 700px;
    margin: 0 auto;
    animation: learnFadeIn 0.3s ease;
}
.learn-step-header {
    margin-bottom: 28px;
}
.learn-progress-bar {
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 12px;
}
.learn-progress-fill {
    height: 100%;
    background: var(--cat-color, #5BA8A0);
    border-radius: 4px;
    transition: width 0.4s ease;
}
.learn-step-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #718096;
}
.learn-step-footer {
    margin-top: 24px;
}

/* ================================================================
   INFO STEP
   ================================================================ */
.learn-info-step h3 {
    font-size: 1.3rem;
    color: #2d3748;
    margin: 0 0 16px 0;
}
.learn-info-text {
    font-size: 1.15rem;
    line-height: 1.75;
    color: #4a5568;
    margin-bottom: 20px;
}
.learn-info-block {
    background: #f7fafc;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 14px;
}
.learn-info-block h3 { margin: 0 0 10px 0; color: #2d3748; }
.learn-info-block p { margin: 4px 0; line-height: 1.7; color: #4a5568; }
.learn-info-block ul { padding-left: 20px; margin: 8px 0; }
.learn-info-block li { margin-bottom: 6px; line-height: 1.6; }

.learn-tip {
    background: #fffbeb;
    border-left: 4px solid #f6ad55;
    padding: 14px 18px;
    border-radius: 0 12px 12px 0;
    margin-top: 12px;
    font-size: 0.95rem;
    color: #744210;
}

/* ================================================================
   EXERCISE STEP
   ================================================================ */
.learn-exercise-step h3 {
    color: #5BA8A0;
    margin: 0 0 12px 0;
}
.learn-exercise-q {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 24px;
    line-height: 1.5;
}
.learn-exercise-opts {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.learn-opt-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 14px;
    font-size: 1.05rem;
    cursor: pointer;
    transition: all 0.25s;
    text-align: left;
    color: #2d3748;
}
.learn-opt-btn:hover:not(:disabled) {
    border-color: #5BA8A0;
    background: rgba(91, 168, 160, 0.05);
}
.learn-opt-btn.selected {
    border-color: #5BA8A0;
    background: rgba(91, 168, 160, 0.1);
}
.learn-opt-btn.correct {
    border-color: #48bb78 !important;
    background: #f0fff4 !important;
}
.learn-opt-btn.incorrect {
    border-color: #fc8181 !important;
    background: #fff5f5 !important;
}
.learn-opt-letter {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #5BA8A0;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}
.learn-opt-btn.correct .learn-opt-letter { background: #48bb78; }
.learn-opt-btn.incorrect .learn-opt-letter { background: #fc8181; }

/* Feedback */
.learn-feedback {
    margin-top: 20px;
    padding: 20px;
    border-radius: 14px;
    animation: learnFadeIn 0.3s ease;
}
.learn-feedback.correct {
    background: #f0fff4;
    border: 2px solid #48bb78;
}
.learn-feedback.incorrect {
    background: #fff5f5;
    border: 2px solid #fc8181;
}
.learn-feedback p { margin: 8px 0; line-height: 1.5; }
.learn-feedback .learn-btn-primary { margin-top: 12px; }
.learn-feedback.hidden { display: none; }

/* ================================================================
   SUMMARY STEP
   ================================================================ */
.learn-summary-step {
    text-align: center;
    padding: 20px 0;
}
.learn-summary-icon {
    font-size: 4rem;
    margin-bottom: 12px;
}
.learn-summary-step h3 {
    font-size: 1.4rem;
    color: #2d3748;
    margin: 0 0 10px 0;
}
.learn-summary-step p {
    color: #718096;
    margin-bottom: 16px;
}
.learn-summary-points {
    list-style: none;
    padding: 0;
    margin: 20px auto;
    max-width: 400px;
    text-align: left;
    background: #f7fafc;
    padding: 20px 24px;
    border-radius: 14px;
}
.learn-summary-points li {
    padding: 8px 0;
    font-size: 1.05rem;
    color: #4a5568;
    border-bottom: 1px solid #e2e8f0;
}
.learn-summary-points li:last-child { border-bottom: none; }

/* ================================================================
   LESSON COMPLETE
   ================================================================ */
.learn-complete {
    text-align: center;
    padding: 40px 20px;
    animation: learnFadeIn 0.4s ease;
}
.learn-complete-icon {
    font-size: 5rem;
    margin-bottom: 12px;
}
.learn-complete h2 {
    font-size: 1.6rem;
    color: #2d3748;
    margin: 0 0 6px 0;
}
.learn-complete p {
    color: #718096;
}
.learn-score-circle {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--cat-color, #5BA8A0), color-mix(in srgb, var(--cat-color, #5BA8A0), #000 20%));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 24px auto 12px;
    box-shadow: 0 8px 24px rgba(91, 168, 160, 0.3);
}
.learn-score-circle span {
    font-size: 2.2rem;
    font-weight: 700;
    color: white;
}
.learn-score-detail {
    color: #a0aec0;
    font-size: 0.95rem;
}
.learn-complete-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 28px 0;
    flex-wrap: wrap;
}
.learn-complete-stats > div {
    text-align: center;
}
.learn-complete-stats span {
    display: block;
    font-size: 1.2rem;
    margin-bottom: 4px;
}
.learn-complete-stats strong {
    font-size: 1.5rem;
    color: #5BA8A0;
}
.learn-complete-stats small {
    display: block;
    font-size: 0.8rem;
    color: #a0aec0;
}
.learn-complete-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* ================================================================
   QUIZ
   ================================================================ */
.learn-quiz {
    max-width: 700px;
    margin: 0 auto;
}
.learn-quiz-q {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e2e8f0;
}
.learn-quiz-q p { margin: 0 0 10px 0; font-size: 1.05rem; color: #2d3748; }
.learn-quiz-expl {
    font-size: 0.85rem;
    color: #718096;
    margin-top: 8px;
    padding-left: 10px;
    border-left: 3px solid #e2e8f0;
}
.learn-quiz-result {
    margin-top: 24px;
    padding: 24px;
    border-radius: 16px;
    text-align: center;
}
.learn-quiz-result.pass {
    background: #f0fff4;
    border: 2px solid #48bb78;
}
.learn-quiz-result.fail {
    background: #fff5f5;
    border: 2px solid #fc8181;
}
.learn-quiz-result h3 { margin: 0 0 8px 0; }

/* ================================================================
   SCENARIO
   ================================================================ */
.learn-scenario-situation {
    background: #f7fafc;
    padding: 20px;
    border-radius: 14px;
    margin: 16px 0;
    line-height: 1.7;
    color: #4a5568;
    border-left: 4px solid #5BA8A0;
}

/* ================================================================
   BUTTONS
   ================================================================ */
.learn-btn-primary {
    display: inline-block;
    padding: 14px 28px;
    background: linear-gradient(135deg, #5BA8A0 0%, #4a9089 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}
.learn-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(91, 168, 160, 0.35);
}
.learn-btn-sec {
    display: inline-block;
    padding: 12px 24px;
    background: #edf2f7;
    color: #4a5568;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}
.learn-btn-sec:hover {
    background: #e2e8f0;
}
.learn-btn-ghost {
    background: none;
    border: none;
    color: #a0aec0;
    cursor: pointer;
    font-size: 0.95rem;
    padding: 12px;
}

/* ================================================================
   LOADER
   ================================================================ */
.learn-loader {
    text-align: center;
    padding: 60px 20px;
    color: #718096;
}
.learn-loader .spinner-dot {
    width: 40px;
    height: 40px;
    margin: 0 auto 16px;
    border: 4px solid #e2e8f0;
    border-top-color: #5BA8A0;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.learn-error {
    text-align: center;
    padding: 40px;
    color: #718096;
}
.learn-section-divider {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #e2e8f0;
}
.learn-section-divider h3 { margin: 0 0 6px 0; color: #2d3748; }
.learn-section-divider p { color: #718096; margin: 0 0 14px 0; }

/* ================================================================
   MOBILE RESPONSIVE
   ================================================================ */
@media (max-width: 600px) {
    .learn-cats-grid {
        grid-template-columns: 1fr;
    }
    .learn-cat-card {
        padding: 16px;
    }
    .learn-cat-header {
        flex-direction: column;
        text-align: center;
    }
    .learn-stats-bar {
        gap: 20px;
        padding: 16px;
    }
    .learn-stat-val {
        font-size: 1.4rem;
    }
    .learn-lesson-card {
        padding: 14px;
    }
    .learn-exercise-q {
        font-size: 1.1rem;
    }
    .learn-opt-btn {
        padding: 14px 16px;
        font-size: 1rem;
    }
    .learn-info-text {
        font-size: 1.05rem;
    }
    .learn-complete-stats {
        gap: 20px;
    }
    .learn-score-circle {
        width: 110px;
        height: 110px;
    }
    .learn-score-circle span {
        font-size: 1.8rem;
    }
    .learn-btn-primary {
        width: 100%;
        text-align: center;
    }
    .learn-complete-actions {
        flex-direction: column;
    }
    .learn-complete-actions .learn-btn-sec {
        width: 100%;
        text-align: center;
    }
}