/* ============================================================
   LEARN.CSS — Course Viewer, Slides, Progress, AI Tutor
   Used by: /learn
   ============================================================ */

/* ── Course Grid ── */
.learning-paths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.5rem;
    padding: 1rem 0;
}

.learning-path-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: var(--transition-normal);
    cursor: pointer;
}
.learning-path-card:hover { border-color: var(--primary-color); transform: translateY(-2px); }

.path-icon { margin-bottom: 1rem; color: var(--primary-color); font-size: 2rem; }
.path-title { font-size: 1rem; color: var(--text-primary); margin-bottom: 0.5rem; font-weight: 600; }
.path-description { color: var(--text-secondary); font-size: 0.875rem; line-height: 1.5; margin-bottom: 1.25rem; flex: 1; }
.path-footer { width: 100%; }

/* ── Category Filter ── */
.category-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}
.category-filter-bar button {
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

/* ── Course Detail Layout ── */
.course-detail-layout {
    display: flex;
    height: calc(100vh - 160px);
    min-height: 600px;
    gap: 0;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

/* ── Course Sidebar ── */
.course-sidebar {
    width: 280px;
    background: var(--secondary-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}
.course-sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.course-sidebar-header h5 { color: var(--primary-color); margin-bottom: 0.5rem; font-size: 0.95rem; }

.course-progress-bar-wrap {
    height: 6px;
    background: var(--tertiary-bg);
    border-radius: 3px;
    overflow: hidden;
    margin: 0.5rem 0;
}
.course-progress-fill {
    height: 100%;
    background: var(--primary-color);
    border-radius: 3px;
    transition: width 0.4s ease;
}

.course-module-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}
.course-module-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.875rem;
    color: var(--text-secondary);
    border: 1px solid transparent;
}
.course-module-item:hover { background: var(--tertiary-bg); color: var(--text-primary); }
.course-module-item.active { background: rgba(0,123,255,0.1); color: var(--primary-color); border-color: var(--primary-color); }
.course-module-item.completed { color: var(--success-color); }
.course-module-item .module-icon { width: 18px; text-align: center; flex-shrink: 0; }

/* ── Course Content Area ── */
.course-content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

.course-content-header {
    padding: 0.875rem 1.25rem;
    background: var(--tertiary-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    flex-shrink: 0;
}
.course-content-header h3 { color: var(--primary-color); font-size: 1rem; margin: 0; }

.course-slide-content {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    line-height: 1.7;
}

/* ── Terminal Section ── */
.course-terminal-section {
    border-top: 1px solid var(--border-color);
    background: var(--primary-bg);
    flex-shrink: 0;
}
.course-terminal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    cursor: pointer;
    background: var(--tertiary-bg);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
}
.course-code-editor {
    width: 100%;
    min-height: 120px;
    background: #1e1e1e;
    color: #d4d4d4;
    border: none;
    padding: 1rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    resize: vertical;
}
.course-terminal-output {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 0.75rem 1rem;
    font-family: monospace;
    font-size: 0.8rem;
    min-height: 60px;
    max-height: 150px;
    overflow-y: auto;
    border-top: 1px solid #333;
}

/* ── AI Assist Panel ── */
.course-ai-panel {
    width: 320px;
    background: var(--secondary-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}
.course-ai-header {
    padding: 0.875rem 1rem;
    background: var(--tertiary-bg);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.9rem;
    flex-shrink: 0;
}
.course-ai-messages {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.course-ai-input-area {
    padding: 0.75rem;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

/* ── Learn Section Controls ── */
.learn-section-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

@media (max-width: 900px) {
    .course-detail-layout { flex-direction: column; height: auto; }
    .course-sidebar { width: 100%; height: 200px; border-right: none; border-bottom: 1px solid var(--border-color); }
    .course-ai-panel { width: 100%; border-left: none; border-top: 1px solid var(--border-color); }
    .learning-paths-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}