/* Source: RecentTasksView, MyAILessonsView, AssignedMaterialsView,
   GroupCourseViews and VirtualMaterialsView. Native points map to CSS pixels. */
.screen-content:has(>.native-library){padding:0;display:block}
.native-library{box-sizing:border-box;min-height:100%;width:100%;max-width:832px;margin:0 auto;padding:16px;display:flex;flex-direction:column;justify-content:center;gap:12px;color:#1f2937;background:#f8fafc}
.native-library--recent{padding:20px;gap:14px;justify-content:flex-start;background:#f7fafc}
.native-library--myai,.native-library--community{padding:8px 16px;gap:8px}
.native-library button{font-family:inherit;white-space:normal;overflow-wrap:anywhere;text-align:left;box-sizing:border-box;box-shadow:none}
.native-library-identity{display:flex;align-items:center;flex-direction:column;gap:12px;padding:12px;text-align:center}
.native-library-identity h2{font-size:22px;line-height:1.2;font-weight:700;margin:0;color:#1e293b}
.native-library-identity-icon{width:64px;height:64px;display:flex;align-items:center;justify-content:center;flex-shrink:0;border-radius:20px;background:color-mix(in srgb,var(--library-accent) 18%,transparent);color:var(--library-accent)}
.native-library--myai .native-library-identity{gap:10px;padding:8px 12px}
.native-library-topic{border-radius:16px;background:white;box-shadow:0 2px 2px #0000000f;overflow:hidden}
.native-library-topic.is-expanded{box-shadow:0 2px 8px #00000024}
.native-library-topic.is-ai{padding:16px;box-shadow:0 1px 2px #0000000f}
.native-library-topic-button{display:block;width:100%;padding:16px;min-height:64px;background:none;border:0;border-radius:0;color:#1f2937}
.native-library-topic.is-ai>.native-library-topic-button{padding:0;min-height:40px}
.native-library-topic-label{display:flex;align-items:center;gap:14px;width:100%}
.native-library-topic.is-ai .native-library-topic-label{gap:12px}
.native-library-topic-title{flex:1;min-width:0;font-size:16px;font-weight:600;line-height:20px}
.native-library-topic-icon{color:var(--library-accent);background:color-mix(in srgb,var(--library-accent) 18%,transparent);width:40px;height:40px;flex-shrink:0;border-radius:12px;display:flex;align-items:center;justify-content:center}
.native-library-expand,.native-library-chevron{color:#94a3b8;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.native-library-expand.is-expanded{transform:rotate(180deg)}
.native-library-branches{display:flex;flex-direction:column;gap:8px;padding:0 16px 16px}
.native-library-topic.is-ai .native-library-branches{gap:6px;padding:12px 0 0}
.native-library-branch{width:100%;border:0;border-radius:12px;padding:12px;min-height:48px;background:#f8fafc;color:#334155;font-size:14px;font-weight:400}
.native-library-branch-content{display:flex;align-items:center;gap:12px;width:100%}
.native-library-branch-title{flex:1;min-width:0}
.native-library-dot{width:30px;height:30px;flex-shrink:0;border-radius:8px;background:color-mix(in srgb,var(--library-accent) 12%,transparent);display:flex;align-items:center;justify-content:center}
.native-library-dot::after{content:'';display:block;width:8px;height:8px;border-radius:50%;background:var(--library-accent)}
.native-library-source-heading{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;line-height:19px;color:#334155;margin:12px 0 2px;padding-left:4px}
.native-library-ai-block{display:flex;align-items:center;border-radius:10px;background:#f8fafc;padding:2px 12px;gap:0}
.native-library-ai-block>.native-library-branch{flex:1;min-width:0;padding:0;border-radius:0;min-height:44px}
.native-library-ai-block .native-library-branch-content{gap:10px}
.native-library-ai-block .native-library-dot{width:28px;height:28px}
.native-library-delete{width:44px;height:44px;min-height:44px;flex-shrink:0;padding:0;background:none;border:0;border-radius:0;color:#dc2626;display:flex;align-items:center;justify-content:center}
.native-library-sharing{min-height:32px;padding:4px 12px;border:0;background:none;color:#4f46e5;font-size:12px}
.native-library-add{width:100%;min-height:48px;padding:10px 12px;border:0;border-radius:10px;background:#eef2ff;color:#4f46e5;font-size:14px;font-weight:600}
.native-library-add-label{display:flex;align-items:center;gap:10px}
.native-library-add-mark{width:28px;height:28px;flex-shrink:0;border-radius:8px;background:#c7d2fe;position:relative}
.native-library-add-mark::before,.native-library-add-mark::after{content:'';position:absolute;display:block;background:#4f46e5;left:6px;top:13px;width:16px;height:2px}
.native-library-add-mark::after{transform:rotate(90deg)}
.native-library-guidance{background:white;border:1px solid #e2e8f0;border-radius:12px;overflow:hidden}
.native-library-guidance-toggle{display:block;width:100%;min-height:44px;padding:11px 14px;background:none;border:0;color:#334155;font-size:14px;font-weight:600;border-radius:0}
.native-library-guidance-label{display:flex;align-items:center;gap:9px}.native-library-guidance-label>.native-icon:last-child{margin-left:auto;color:#64748b}
.native-library-info{display:flex;align-items:center;justify-content:center;border-radius:50%;width:19px;height:19px;flex-shrink:0;color:white;background:#6366f1;font:700 14px Georgia,serif}
.native-library-guidance p{white-space:pre-wrap;margin:0;padding:12px 14px;border-top:1px solid #e2e8f0;font-size:14px;line-height:1.5;color:#475569}
.native-library-segments{display:flex;align-items:stretch;background:#e9e9eb;padding:2px;border-radius:9px;gap:2px;min-height:32px}
.native-library-segments button{flex:1;border:0;border-radius:7px;background:none;padding:5px 8px;text-align:center;color:#18181b;font-size:13px;font-weight:500}
.native-library-segments button.is-selected{background:white;box-shadow:0 1px 4px #00000024}
.native-library-recent{padding:14px;display:flex;flex-direction:column;gap:9px;background:white;border-radius:14px;box-shadow:0 1px 4px #0000000d}
.native-library-recent-title{display:flex;align-items:flex-start;gap:8px}
.native-library-recent h3{font-size:15px;font-weight:600;line-height:19px;margin:0;flex:1;min-width:0}
.native-library-recent.is-unavailable h3{color:#64748b}
.native-library-hierarchy{font-size:12px;line-height:16px;color:#64748b;margin:0}
.native-library-test-tag{display:flex;align-items:center;gap:4px;font-size:12px;font-weight:700;border-radius:999px;background:#ffedd5;color:#f97316;padding:5px 9px}
.native-library-recent-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.native-library-status{border-radius:999px;padding:5px 10px;font-size:12px;font-weight:700;line-height:16px;margin-right:auto}
.native-library-status.is-started{color:#dc2626;background:#fee2e2}.native-library-status.is-completed{color:#16a34a;background:#dcfce7}
.native-library-compact{border:0;min-height:30px;padding:6px 10px;border-radius:7px;color:white;font-size:12px;font-weight:700;text-align:center!important}
.native-library-compact.is-lesson{background:#16a34a}.native-library-compact.is-test{background:#2563eb}
.native-library-unavailable{font-size:12px;color:#64748b}
.native-library-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:28px 16px;color:#64748b}
.native-library-empty h3{margin:0;font-size:20px;color:#1f2937}.native-library-empty p{margin:0;font-size:14px;line-height:1.4}
.native-library-audio-tabs{display:flex;gap:0;border-bottom:1px solid #e2e8f0}
.native-library-audio-tabs button{flex:1;min-width:0;min-height:58px;padding:14px 4px 11px;border:0;border-bottom:3px solid transparent;background:none;border-radius:0;text-align:center;font-size:14px;font-weight:600;color:#4f46e5}
.native-library-audio-tabs button.is-selected{color:#4f46e5;border-bottom-color:#4f46e5}
.native-library-community-card{padding:16px;min-height:80px;border:0;border-radius:16px;background:white;color:#1f2937;box-shadow:0 1px 2px #0000000f}
.native-library-community-label{display:flex;flex-direction:column;gap:3px;font-size:16px;line-height:20px}.native-library-community-label>span{color:#475569}
.native-library-lesson-card{background:white;border-radius:14px;border:1px solid #80808021;box-shadow:0 2px 4px #0000001a;overflow:hidden}
.native-library-lesson-card.is-completed{background:#d1fae5}
.native-library-lesson-button{padding:14px;width:100%;border:0;background:none;border-radius:0;color:inherit}
.native-library-row-label{display:flex;align-items:center;gap:13px;width:100%}
.native-library-number{width:40px;height:40px;flex-shrink:0;border-radius:10px;display:flex;align-items:center;justify-content:center;color:white;background:#4f46e5;font-size:16px;font-weight:700}
.native-library-number.is-completed{background:#34d399}.native-library-number.is-locked{background:#e2e8f0;color:#94a3b8}
.native-library-row-text{display:flex;flex-direction:column;gap:5px;flex:1;min-width:0}.native-library-row-title{font-size:16px;line-height:20px;font-weight:600}
.native-library-row-text small{font-size:12px;line-height:16px;color:#64748b}
.native-library-saved-answers,.native-library-download{padding:14px;min-height:48px;background:none;width:100%;border:0;border-top:1px solid #e2e8f0;border-radius:0;color:#4f46e5;font-size:15px;font-weight:600}
.native-library-test-card{padding:16px;border:0;border-radius:16px;min-height:80px;background:#f1f5f9;color:#64748b;width:100%}
.native-library-test-card .native-library-number{width:44px;height:44px;border-radius:12px;background:#e2e8f0;color:#64748b}
.native-library-test-card.is-unlocked{background:#f97316;color:white}.native-library-test-card.is-unlocked .native-library-number{background:#ffffff40;color:white}
.native-library-test-card .native-library-row-title{font-size:17px;font-weight:700}.native-library-test-card .native-library-row-text small{color:inherit}
.native-library-total{font-size:14px;text-align:center;color:#64748b;margin:0}
.native-library-file-button{width:100%;border:0;background:white;color:#4f46e5;border-radius:12px;padding:14px;min-height:48px}
.native-library-file{display:flex;align-items:center;gap:12px}.native-library-course-lesson-title{text-align:center;font-size:22px;line-height:1.2}
.native-library-link{background:none;color:#4f46e5;border:0;padding:12px;text-align:center!important}
.native-library button:disabled{opacity:.5}.native-library button:focus-visible{outline:2px solid #4f46e5;outline-offset:2px}
@media(max-width:360px){.native-library-recent-actions{gap:6px}.native-library-compact{padding:6px 8px}}
/* WelcomeContentView / VirtualMaterialsModels: fixed outer viewport, independent scroll regions. */
.screen-content:has(.native-welcome){display:flex;overflow:hidden;padding:0;gap:0}.native-library--welcome{height:100%;min-height:0;flex:1;justify-content:flex-start;overflow:hidden;padding:0}
.native-welcome{height:100%;min-height:0;box-sizing:border-box;width:100%;padding:8px 16px;display:flex;flex-direction:column;gap:var(--welcome-gap,12px);align-items:flex-start;overflow:hidden}.native-welcome-intro{overflow:auto;flex-shrink:0;width:100%;overscroll-behavior:contain}.native-welcome-intro p{font-size:22px;line-height:1.25;font-weight:700;margin:0}.native-welcome-video{position:relative;max-width:100%;align-self:center;flex-shrink:0;background:black;border-radius:16px;overflow:hidden}.native-welcome-video-host,.native-welcome-video video{height:100%;width:100%;display:block;object-fit:contain}.native-library-media-overlay{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);height:64px;width:64px;min-height:64px;min-width:64px;display:flex;align-items:center;justify-content:center;border:0;border-radius:50%;padding:0;background:#ffffffeb;color:#4f46e5;box-shadow:none}.native-library-media-overlay[hidden]{display:none}.native-library-media-spinner{width:24px;height:24px;border:3px solid #d4d4d8;border-top-color:#4f46e5;border-radius:50%;animation:spin .8s linear infinite;box-sizing:border-box}
.native-welcome-transports{display:flex;gap:8px;width:100%;height:44px;flex-shrink:0}.native-welcome-transport{display:flex;justify-content:center;align-items:center;gap:4px;flex:1;min-height:44px;border:0;border-radius:12px;background:#80808014;color:#007aff;font-size:12px;padding:0 8px;box-shadow:none}.native-welcome-transport:disabled{color:#64748b;opacity:1}.native-welcome-transcript{width:100%;flex-shrink:0;min-height:0;overflow:auto;overscroll-behavior:contain;border:1px solid #e2e8f0;border-radius:16px;padding:8px;background:white;box-sizing:border-box}.native-welcome-transcript p{font-size:17px;font-weight:400;line-height:1.4;margin:0 0 8px;padding:6px;color:#94a3b8}.native-welcome-transcript p.is-active{color:black;font-weight:700}.native-welcome-transcript:empty{background:none;border:0}.native-welcome-faq{width:100%;flex-shrink:0;min-height:0;overflow:auto;overscroll-behavior:contain;display:flex;flex-direction:column;gap:12px}.native-welcome-faq summary{min-height:44px;display:flex;align-items:center;color:#007aff;cursor:pointer;font-size:17px;list-style:none}.native-welcome-faq summary:after{content:'›';font-size:22px;margin-left:auto;transform:rotate(90deg)}.native-welcome-faq details[open]>summary:after{transform:rotate(-90deg)}.native-welcome-faq p{font-size:17px;line-height:1.4;margin:0}.native-welcome-error{overflow:auto;color:#dc2626;font-size:13px;flex-shrink:0;width:100%}.native-welcome-error[hidden]{display:none}.native-welcome-unavailable{overflow:auto;height:44px;font-size:17px;color:#64748b;margin:0;flex-shrink:0}
/* GroupCourseLessonView owns its header and safe-area action dock while opened. */
.shell:has(.native-course-player){grid-template-rows:minmax(0,1fr)}.shell:has(.native-course-player)>.shell-header,.shell:has(.native-course-player)>.bottom-tabs{display:none}.screen-content:has(.native-course-player){padding:0;overflow:hidden;display:flex;gap:0}.native-library--course-player{height:100%;min-height:0;padding:0;display:flex;overflow:hidden;justify-content:flex-start;gap:0}.native-course-player{height:100%;min-height:0;display:flex;flex-direction:column;width:100%;color:#1e293b}.native-course-header{display:flex;gap:8px;align-items:center;padding:8px 16px;background:white;flex-shrink:0}.native-course-header button{border:0;background:none;min-width:44px;min-height:44px;display:flex;align-items:center;justify-content:center;color:#64748b;padding:0}.native-course-header h2{flex:1;font-size:17px;font-weight:600;line-height:1.3;text-align:center;margin:0}
.native-course-scroll{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain}.native-course-content{box-sizing:border-box;padding:16px;min-height:100%;display:flex;flex-direction:column;justify-content:center;gap:16px}.native-course-video{position:relative;aspect-ratio:16/9;width:100%;background:black;border-radius:16px;overflow:hidden}.native-course-video video{display:block;width:100%;height:100%;object-fit:contain}.native-course-audio{padding:24px;display:flex;justify-content:center;align-items:center;color:#4f46e5}.native-course-audio audio{display:none}.native-course-materials{display:flex;flex-direction:column;gap:12px}.native-course-materials h3{font-size:17px;font-weight:600;margin:0}.native-course-file{display:flex;align-items:center;gap:12px;width:100%;padding:14px;min-height:48px;background:white;border:0;border-radius:14px;color:#4f46e5;font-size:15px;font-weight:600}.native-course-file>span:nth-child(2){flex:1}.native-course-document{width:18px;height:22px;box-sizing:border-box;border:1.5px solid currentColor;border-radius:2px;display:block;flex-shrink:0}.native-course-error{font-size:13px;color:#64748b;margin:0}.native-course-error:empty{display:none}
.native-course-dock{padding:10px 16px;display:flex;flex-direction:column;gap:8px;align-items:stretch;background:white;flex-shrink:0}.native-course-back{align-self:center;display:flex;align-items:center;justify-content:center;width:48px;height:48px;min-height:48px;border:0;border-radius:50%;color:white;background:#333;box-shadow:0 3px 6px #0003;padding:0;margin:0 0 6px}.native-course-dock input[type=range]{accent-color:#4f46e5;width:100%;min-height:24px;padding:0}.native-course-progress{text-align:center;font-size:12px;color:#64748b;margin:0}.native-course-actions{display:flex;gap:10px}.native-course-actions button{flex:1;text-align:center;font-size:17px;font-weight:600;min-height:48px;border:0;border-radius:999px;padding:10px 16px;color:white}.native-course-play{background:#4f46e5}.native-course-finish{background:#34d399}.native-course-actions button:disabled{opacity:.4}
.native-library-assigned-download{border-top:1px solid #e2e8f0;padding:10px 16px;display:flex;flex-direction:column;gap:5px;color:#007aff}.native-library-assigned-download>.native-library-download{display:flex;gap:10px;align-items:center;min-height:24px;font-size:14px;font-weight:600;padding:0;border:0;text-align:left;color:#007aff}.native-library-assigned-download p{font-size:11px;color:#64748b;line-height:1.35;margin:0}