.course-platform_container__HogM2{min-height:100vh;background:#f8fafc;color:#1e293b;font-family:Inter,sans-serif}.course-platform_header__BMhuQ{height:64px;background:#fff;border-bottom:1px solid #e2e8f0;display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:-webkit-sticky;position:sticky;top:0;z-index:50}.course-platform_logo__bmCxL{font-weight:700;font-size:1.25rem;color:#4f46e5}.course-platform_userNav__Gx5Tl{display:flex;align-items:center;gap:16px}.course-platform_avatar__0leky{width:32px;height:32px;border-radius:50%;background:#e2e8f0}.course-platform_layout__38t8z{display:grid;grid-template-columns:320px 1fr 300px;height:calc(100vh - 64px)}.course-platform_sidebar__1DdHM{background:#fff;border-right:1px solid #e2e8f0;overflow-y:auto;padding:24px}.course-platform_sidebarTitle__KfaVD{font-size:.875rem;font-weight:600;color:#64748b;text-transform:uppercase;margin-bottom:16px;letter-spacing:.05em}.course-platform_lessonList__RzgBt{display:flex;flex-direction:column;gap:4px}.course-platform_lessonItem__EjlY6{padding:12px;border-radius:8px;cursor:pointer;display:flex;align-items:center;gap:12px;transition:.2s;font-size:.9375rem}.course-platform_lessonItem__EjlY6:hover{background:#f1f5f9}.course-platform_activeLesson__IGuhO{background:#eef2ff;color:#4f46e5;font-weight:500}.course-platform_content__gdmsu{padding:32px;overflow-y:auto;background:#fff}.course-platform_videoPlaceholder__Fmrrx{aspect-ratio:16/9;background:#0f172a;border-radius:12px;margin-bottom:24px;display:flex;align-items:center;justify-content:center}.course-platform_playIcon__OQo_0{color:#fff;opacity:.5}.course-platform_lessonInfo__qJkKB{max-width:800px}.course-platform_lessonTitle__0oXoW{font-size:1.875rem;font-weight:700;margin-bottom:12px}.course-platform_lessonDescription__nwxwj{color:#475569;line-height:1.6}.course-platform_sidecar__lGpj1{background:#f1f5f9;border-left:1px solid #e2e8f0;display:flex;flex-direction:column}.course-platform_aiHeader__aABnX{padding:20px;background:#fff;border-bottom:1px solid #e2e8f0;display:flex;align-items:center;gap:10px;font-weight:600}.course-platform_chatArea__Lsbtu{flex:1 1;padding:20px;overflow-y:auto;display:flex;flex-direction:column;gap:16px}.course-platform_message__8pNXn{padding:12px;border-radius:12px;font-size:.875rem;max-width:90%}.course-platform_bot__BV4nF{background:#fff;border:1px solid #e2e8f0;align-self:flex-start}.course-platform_user__wCYCe{background:#4f46e5;color:#fff;align-self:flex-end}.course-platform_chatInput__wCn7y{padding:16px;background:#fff;border-top:1px solid #e2e8f0}.course-platform_inputWrapper___M8Hq{display:flex;gap:8px;background:#f1f5f9;padding:8px 12px;border-radius:20px}.course-platform_input__GRF01{border:none;background:transparent;flex:1 1;outline:none;font-size:.875rem}.course-platform_sendBtn__jZF8M{background:#4f46e5;color:#fff;border:none;border-radius:50%;width:28px;height:28px;display:flex;align-items:center;justify-content:center;cursor:pointer}