/* Trải nghiệm học sinh gọn: lớp học lấy bài giảng làm trung tâm. */
.student-class-page .wrap{max-width:1360px}.student-class-page .greet{padding:30px 0 14px}.student-class-page .greet h1{font-size:1.55rem}.student-class-page .lessons{padding:10px 0 34px}.student-meet-strip>div:nth-child(2){gap:12px!important;flex-wrap:nowrap!important}.student-meet-strip>div:nth-child(2)>div:first-child{min-width:0}.student-meet-strip [style*="font-size: 2.2rem"]{width:40px!important;height:40px!important;font-size:1.25rem!important}.student-class-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:18px;align-items:start}.student-class-rail{position:sticky;top:82px;display:grid;gap:10px;padding:15px;border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:var(--shadow-sm)}.student-rail-label{display:flex;align-items:center;gap:9px;padding:2px 2px 9px;border-bottom:1px solid var(--line)}.student-rail-label>span{font-size:1.25rem}.student-rail-label b,.student-rail-label small{display:block}.student-rail-label b{font-size:.88rem}.student-rail-label small{font-size:.66rem;color:var(--ink-3);margin-top:2px}.student-rail-section-title{margin-top:4px;font-size:.68rem;font-weight:900;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}.student-class-rail #tabLopHocSinh{margin:0!important;padding:0!important;border:0!important;display:grid!important;gap:5px}.student-class-rail #tabLopHocSinh .tab-btn{width:100%;padding:10px 11px;text-align:left;border:1px solid transparent;border-radius:10px;font-size:.78rem}.student-class-rail #tabLopHocSinh .tab-btn.active{border-color:color-mix(in srgb,var(--accent) 30%,transparent)}.student-class-rail #btLopBox{margin:0!important}.student-class-rail #btLopBox>div{box-shadow:none!important;border-radius:11px!important}.student-class-rail #btLopBox>div>div:first-child{padding:10px!important}.student-class-rail #btLopBox img{width:28px!important;height:28px!important}.student-class-rail #btLopBox .btn{display:none!important}.student-class-rail #btLopBox a{padding:7px!important}.student-class-rail #btLopBox a span span:first-child{font-size:.72rem!important;white-space:normal!important}.student-lesson-main{min-width:0;border:1px solid var(--line);border-radius:18px;background:var(--surface);padding:18px;box-shadow:var(--shadow-sm)}.student-lesson-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:15px;padding-bottom:14px;border-bottom:1px solid var(--line)}.student-lesson-heading h2{margin:4px 0 3px;font-size:1.38rem}.student-lesson-heading p{margin:0;color:var(--ink-3);font-size:.74rem}.student-lesson-main #studentSubTabs{margin:0!important;padding:0!important;border:0!important;gap:5px!important;flex-wrap:nowrap}.student-lesson-main #studentSubTabs .tab-btn{white-space:nowrap;padding:9px 12px;font-size:.76rem;border:1px solid var(--line)}.student-lesson-main .lh-topic{margin-bottom:10px}.student-lesson-main .lh-topic-hd{padding:13px 15px}.student-lesson-main .lh-bai-hd{padding:11px 15px}.student-lesson-main #dsTaiLieuHocSinh .table{font-size:.8rem}.student-class-page .map-ribbon{margin-bottom:12px}

@media(max-width:900px){.student-class-layout{grid-template-columns:210px minmax(0,1fr);gap:12px}.student-class-rail{padding:12px}.student-lesson-main{padding:14px}.student-lesson-heading{align-items:flex-start;flex-direction:column}.student-lesson-main #studentSubTabs{width:100%}.student-lesson-main #studentSubTabs .tab-btn{flex:1}}
@media(max-width:720px){.student-class-page .wrap{padding-left:13px;padding-right:13px}.student-class-page .greet{padding-top:22px}.student-meet-strip>div:nth-child(2){align-items:stretch!important;flex-direction:column}.student-meet-strip #linkMeetHoc{width:100%;justify-content:center}.student-class-layout{display:flex;flex-direction:column}.student-lesson-main{order:1;width:100%;padding:12px}.student-class-rail{order:2;position:static;width:100%}.student-class-rail #tabLopHocSinh{display:flex!important;overflow-x:auto;padding-bottom:3px!important}.student-class-rail #tabLopHocSinh .tab-btn{width:auto;min-width:max-content}.student-lesson-heading h2{font-size:1.18rem}.student-lesson-heading p{font-size:.7rem}.student-lesson-main .lh-topic-hd{padding:11px 10px;gap:9px}.student-lesson-main .lh-bai-hd{padding:10px 8px;gap:8px}.student-lesson-main .lh-bai-hd .tt h4{font-size:.83rem}.student-lesson-main .lesson-dot{margin-left:4px}.student-lesson-main #dsTaiLieuHocSinh{overflow-x:auto}.student-lesson-main #dsTaiLieuHocSinh table{min-width:680px}}

/* Trang cá nhân: gom toàn bộ công cụ phụ vào một hub rõ ràng. */
.student-personal-hub{margin:4px 0 22px;padding:20px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(135deg,var(--surface),var(--accent-soft));box-shadow:var(--shadow-sm)}.student-personal-hub[hidden]{display:none!important}.student-personal-hub-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:15px}.student-personal-hub-head h2{margin:4px 0 3px;font-size:1.28rem}.student-personal-hub-head p{margin:0;color:var(--ink-3);font-size:.78rem;max-width:620px}.student-personal-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.student-personal-links a{display:grid;grid-template-columns:34px minmax(0,1fr);grid-template-rows:auto auto;column-gap:10px;padding:13px;border:1px solid var(--line);border-radius:13px;background:var(--surface);color:var(--ink);text-decoration:none;transition:.18s}.student-personal-links a:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:var(--shadow-sm)}.student-personal-links span{grid-row:1/3;width:32px;height:32px;display:grid;place-items:center;border-radius:10px;background:var(--surface-2);font-size:1.05rem}.student-personal-links b{font-size:.82rem}.student-personal-links small{margin-top:2px;color:var(--ink-3);font-size:.64rem;line-height:1.35}

/* Kết quả: bài đã chấm được trình bày như một hộp thư phản hồi. */
.student-results-page .wrap{max-width:1180px}.student-results-head{display:flex;justify-content:space-between;align-items:end;gap:20px;padding:38px 0 18px}.student-results-head h1{margin:6px 0 5px;font-size:clamp(1.75rem,3vw,2.55rem)}.student-results-head p{margin:0;color:var(--ink-2)}.student-results-count{min-width:128px;padding:14px 17px;text-align:center;border:1px solid var(--line);border-radius:15px;background:var(--surface);box-shadow:var(--shadow-sm)}.student-results-count strong,.student-results-count small{display:block}.student-results-count strong{font-size:1.7rem;color:var(--accent)}.student-results-count small{font-size:.68rem;color:var(--ink-3)}.student-results-toolbar{display:flex;gap:8px;align-items:center;overflow-x:auto;padding:3px 0 15px}.student-result-filter{flex:0 0 auto;padding:9px 13px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink-2);font:inherit;font-size:.74rem;font-weight:800;cursor:pointer}.student-result-filter.active{background:var(--accent);border-color:var(--accent);color:var(--on-accent,#fff)}.student-results-list{display:grid;gap:11px;padding-bottom:90px}.student-result-card{display:grid;grid-template-columns:58px minmax(0,1fr) auto;gap:15px;align-items:center;padding:16px;border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:var(--shadow-sm)}.student-result-score{width:58px;height:58px;display:grid;place-items:center;border-radius:16px;background:var(--accent-soft);color:var(--accent);font-size:1.15rem;font-weight:900}.student-result-score.no-score{font-size:.72rem}.student-result-main{min-width:0}.student-result-meta{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-bottom:5px}.student-result-kind,.student-result-corrected{padding:3px 7px;border-radius:999px;background:var(--surface-2);font-size:.62rem;font-weight:800;color:var(--ink-2)}.student-result-corrected{background:var(--ok-soft);color:var(--ok)}.student-result-main h2{margin:0;font-size:.96rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.student-result-main p{margin:5px 0 0;color:var(--ink-3);font-size:.7rem;line-height:1.45}.student-result-actions{display:flex;gap:7px;align-items:center}.student-results-empty,.student-results-error{padding:54px 22px;text-align:center;border:1px dashed var(--line);border-radius:18px;background:var(--surface)}.student-results-empty span,.student-results-error span{display:block;font-size:2.2rem;margin-bottom:8px}.student-results-empty p,.student-results-error p{margin:6px auto 0;color:var(--ink-3);max-width:520px}.student-result-dialog{border:0;padding:0;width:min(760px,calc(100vw - 24px));max-height:calc(100vh - 32px);border-radius:20px;background:var(--surface);color:var(--ink);box-shadow:0 24px 80px rgba(0,0,0,.35)}.student-result-dialog::backdrop{background:rgba(8,10,13,.66);backdrop-filter:blur(3px)}.student-result-dialog-inner{padding:21px;max-height:calc(100vh - 32px);overflow:auto}.student-result-dialog-head{display:flex;justify-content:space-between;gap:15px;align-items:start;padding-bottom:14px;border-bottom:1px solid var(--line)}.student-result-dialog-head h2{margin:4px 0 0;font-size:1.25rem}.student-result-dialog-close{border:1px solid var(--line);background:var(--surface-2);color:var(--ink);border-radius:10px;width:36px;height:36px;cursor:pointer}.student-result-feedback{margin-top:16px;padding:15px;border-radius:14px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 25%,transparent)}.student-result-feedback b{display:block;margin-bottom:6px}.student-result-feedback p{white-space:pre-wrap;margin:0;line-height:1.6;font-size:.86rem}.student-result-file-section{margin-top:17px}.student-result-file-section h3{margin:0 0 9px;font-size:.84rem}.student-result-files{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.student-result-file{min-width:0;display:flex;flex-direction:column;gap:6px;padding:9px;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);color:var(--ink);text-decoration:none}.student-result-file img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:8px;background:var(--surface)}.student-result-file span{font-size:.68rem;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.student-result-file.generic{min-height:88px;align-items:center;justify-content:center;text-align:center}.student-result-deep-link{margin-top:18px;display:flex;justify-content:flex-end}

.student-results-scope{display:grid;grid-template-columns:repeat(2,minmax(180px,280px));gap:12px;margin-bottom:12px}.student-results-scope label{display:grid;gap:5px}.student-results-scope label>span{font-size:.68rem;font-weight:800;color:var(--ink-3);text-transform:uppercase;letter-spacing:.06em}.student-results-scope select{min-height:42px}.student-result-assessment{padding:3px 8px;border-radius:999px;font-size:.62rem;font-weight:900}.student-result-assessment.needs-improvement,.student-result-assessment-banner.needs-improvement{background:var(--err-soft);color:var(--err)}.student-result-assessment.meets,.student-result-assessment-banner.meets{background:var(--ok-soft);color:var(--ok)}.student-result-assessment.good,.student-result-assessment-banner.good{background:var(--accent-soft);color:var(--accent)}.student-result-score.needs-improvement{background:var(--err-soft);color:var(--err)}.student-result-score.meets{background:var(--ok-soft);color:var(--ok)}.student-result-dialog-meta{display:flex;gap:8px 18px;flex-wrap:wrap;margin-top:12px;color:var(--ink-3);font-size:.76rem}.student-result-assessment-banner{display:flex;align-items:center;gap:11px;margin-top:14px;padding:12px 14px;border-radius:13px}.student-result-assessment-banner>span{font-size:1.55rem}.student-result-assessment-banner small,.student-result-assessment-banner b{display:block}.student-result-assessment-banner small{font-size:.62rem;text-transform:uppercase;letter-spacing:.05em}.student-result-pdf{grid-column:span 3}.student-result-pdf iframe{width:100%;height:min(58vh,520px);border:0;border-radius:8px;background:#fff}.student-result-pdf a{color:var(--accent);font-size:.74rem;font-weight:800}.student-result-inline-note{margin:18px 0 0;padding:10px 12px;border-radius:10px;background:var(--surface-2);color:var(--ink-3);font-size:.74rem}

@media(max-width:760px){.student-personal-hub-head,.student-results-head{align-items:stretch;flex-direction:column}.student-personal-hub-head .btn{width:100%;justify-content:center}.student-personal-links{grid-template-columns:repeat(2,minmax(0,1fr))}.student-results-count{display:flex;gap:8px;align-items:baseline;justify-content:center;min-width:0}.student-results-scope{grid-template-columns:1fr 1fr}.student-result-card{grid-template-columns:48px minmax(0,1fr);gap:11px}.student-result-score{width:48px;height:48px;border-radius:13px}.student-result-actions{grid-column:1/3}.student-result-actions .btn{width:100%;justify-content:center}.student-result-files{grid-template-columns:repeat(2,minmax(0,1fr))}.student-result-pdf{grid-column:span 2}}
@media(max-width:460px){.student-personal-links{grid-template-columns:1fr}.student-results-scope{grid-template-columns:1fr}.student-result-files{grid-template-columns:1fr 1fr}}

/* Kết quả phải luôn nằm giữa viewport, kể cả màn hình siêu rộng. */
.student-results-page .wrap{box-sizing:border-box;width:min(1180px,calc(100% - 40px));max-width:1180px!important;margin-inline:auto!important;padding-inline:0;transform:none!important}.student-results-list,.student-results-head,.student-results-toolbar{width:100%;min-width:0}.student-result-dialog{box-sizing:border-box;position:fixed;inset:0;margin:auto!important;width:min(880px,calc(100vw - 32px));max-width:880px;max-height:calc(100dvh - 32px)}.student-result-dialog-inner{box-sizing:border-box;max-height:calc(100dvh - 32px)}.student-result-file span{white-space:normal;overflow-wrap:anywhere}.student-result-dialog[open]{display:block}
.student-result-solution-badge{padding:3px 8px;border-radius:999px;background:color-mix(in srgb,#7c3aed 12%,var(--surface));color:#7c3aed;font-size:.62rem;font-weight:900}.student-result-solution{margin-top:18px;padding:15px;border:1px solid color-mix(in srgb,#7c3aed 35%,var(--line));border-radius:16px;background:linear-gradient(135deg,var(--surface),color-mix(in srgb,#7c3aed 6%,var(--surface)))}.student-result-solution-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}.student-result-solution-head>span{font-size:1.6rem}.student-result-solution-head small,.student-result-solution-head h3{display:block;margin:0}.student-result-solution-head small{color:#7c3aed;font-size:.6rem;font-weight:900;letter-spacing:.1em}.student-result-solution-head h3{font-size:.95rem}.student-result-solution .vm-tex-reader{width:100%;max-width:none;padding:18px;border-radius:12px;box-shadow:none;font-family:var(--font-reading,var(--font-sans))}.student-result-solution .vm-tex-reader-head{display:none}.student-result-solution-error{margin-top:16px;padding:12px;border:1px solid var(--err);border-radius:12px;background:var(--err-soft);color:var(--err);font-size:.78rem}
.student-result-solution-ready{display:flex;align-items:flex-start;gap:11px;margin-top:16px;padding:14px;border:1px solid color-mix(in srgb,#7c3aed 32%,var(--line));border-radius:14px;background:color-mix(in srgb,#7c3aed 8%,var(--surface));color:var(--ink)}.student-result-solution-ready>span{font-size:1.45rem}.student-result-solution-ready b{display:block;color:#7c3aed}.student-result-solution-ready p{margin:4px 0 0;color:var(--ink-2);font-size:.78rem;line-height:1.55}

/* Bản đồ thành tựu học sinh. */
.achievement-page .wrap{box-sizing:border-box;width:min(1320px,calc(100% - 40px));max-width:1320px;margin-inline:auto;padding-bottom:100px}.achievement-hero{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(280px,.6fr);gap:18px;align-items:stretch;padding:38px 0 20px}.achievement-hero-main,.achievement-level-card{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:24px;background:var(--surface);box-shadow:var(--shadow-sm)}.achievement-hero-main{padding:28px;background:radial-gradient(circle at 85% 20%,color-mix(in srgb,var(--accent) 24%,transparent),transparent 34%),linear-gradient(145deg,var(--surface),var(--accent-soft))}.achievement-hero-main h1{margin:8px 0 7px;font-size:clamp(2rem,4.2vw,3.7rem)}.achievement-hero-main p{max-width:720px;margin:0;color:var(--ink-2);line-height:1.65}.achievement-summary{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;margin-top:22px}.achievement-summary div{padding:12px;border:1px solid color-mix(in srgb,var(--accent) 18%,var(--line));border-radius:14px;background:color-mix(in srgb,var(--surface) 85%,transparent)}.achievement-summary b,.achievement-summary small{display:block}.achievement-summary b{font-size:1.2rem}.achievement-summary small{margin-top:2px;color:var(--ink-3);font-size:.64rem}.achievement-level-card{display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:24px}.achievement-level-orb{width:116px;height:116px;display:grid;place-items:center;border-radius:50%;background:conic-gradient(var(--accent) var(--level-progress,0%),var(--surface-2) 0);box-shadow:0 12px 34px color-mix(in srgb,var(--accent) 30%,transparent)}.achievement-level-orb::before{content:"";grid-area:1/1;width:94px;height:94px;border-radius:50%;background:var(--surface)}.achievement-level-orb span{grid-area:1/1;position:relative;font-size:1.65rem;font-weight:900;color:var(--accent)}.achievement-level-card h2{margin:15px 0 3px;font-size:1.25rem}.achievement-level-card p{margin:0;color:var(--ink-3);font-size:.72rem}.achievement-progress{width:100%;height:9px;margin-top:15px;border-radius:999px;overflow:hidden;background:var(--surface-2)}.achievement-progress i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),var(--warn));width:var(--level-progress,0%)}.achievement-map-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin:20px 0 14px}.achievement-map-head h2{margin:5px 0 3px}.achievement-map-head p{margin:0;color:var(--ink-3);font-size:.78rem}.achievement-legend{display:flex;gap:8px;flex-wrap:wrap}.achievement-legend span{padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:var(--surface);font-size:.66rem;font-weight:800}.achievement-map{display:grid;gap:18px}.achievement-region{--region:#c88a00;position:relative;overflow:hidden;padding:22px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(145deg,var(--surface),color-mix(in srgb,var(--region) 7%,var(--surface)));box-shadow:var(--shadow-sm)}.achievement-region:nth-child(2){--region:#18866b}.achievement-region:nth-child(3){--region:#3a71c1}.achievement-region:nth-child(4){--region:#7a51bd}.achievement-region:nth-child(5){--region:#c75570}.achievement-region:nth-child(6){--region:#a56818}.achievement-region-head{display:flex;align-items:center;gap:13px;margin-bottom:20px}.achievement-region-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:15px;background:color-mix(in srgb,var(--region) 16%,var(--surface));font-size:1.45rem}.achievement-region-head b,.achievement-region-head small{display:block}.achievement-region-head b{font:700 1.15rem/1.2 var(--font-title);text-transform:uppercase;letter-spacing:.03em}.achievement-region-head small{margin-top:4px;color:var(--ink-3);font-size:.7rem}.achievement-track{position:relative;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:18px}.achievement-track::before{content:"";position:absolute;left:6%;right:6%;top:40px;height:6px;border-radius:999px;background:linear-gradient(90deg,var(--region),color-mix(in srgb,var(--region) 22%,var(--surface-2)));opacity:.45}.achievement-region:nth-child(even) .achievement-track{direction:rtl}.achievement-region:nth-child(even) .achievement-node{direction:ltr}.achievement-node{position:relative;z-index:1;min-width:0;border:0;background:transparent;color:var(--ink);font:inherit;cursor:pointer;text-align:center}.achievement-node-orb{width:80px;height:80px;margin:0 auto 9px;display:grid;place-items:center;border:5px solid var(--surface);border-radius:50%;background:var(--surface-2);box-shadow:0 0 0 2px var(--line),0 8px 18px rgba(0,0,0,.1);font-size:1.55rem;transition:.2s}.achievement-node.completed .achievement-node-orb{background:var(--region);box-shadow:0 0 0 3px color-mix(in srgb,var(--region) 40%,transparent),0 10px 22px color-mix(in srgb,var(--region) 28%,transparent)}.achievement-node.current .achievement-node-orb{background:var(--surface);box-shadow:0 0 0 5px color-mix(in srgb,var(--region) 38%,transparent),0 0 28px color-mix(in srgb,var(--region) 46%,transparent);animation:achievementPulse 2s ease-in-out infinite}.achievement-node.locked{opacity:.58}.achievement-node b,.achievement-node small{display:block}.achievement-node b{font-size:.76rem}.achievement-node small{margin-top:3px;color:var(--ink-3);font-size:.61rem;line-height:1.3}.achievement-node:hover .achievement-node-orb{transform:translateY(-4px) scale(1.04)}@keyframes achievementPulse{50%{transform:scale(1.06)}}.achievement-badges{margin-top:22px;padding:22px;border:1px solid var(--line);border-radius:22px;background:var(--surface)}.achievement-badges h2{margin:0 0 4px}.achievement-badges>p{margin:0 0 15px;color:var(--ink-3);font-size:.75rem}.achievement-badge-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:9px}.achievement-badge{padding:12px;text-align:center;border:1px solid var(--line);border-radius:14px;background:var(--surface-2)}.achievement-badge.locked{filter:grayscale(1);opacity:.48}.achievement-badge span,.achievement-badge b,.achievement-badge small{display:block}.achievement-badge span{font-size:1.55rem}.achievement-badge b{margin-top:4px;font-size:.7rem}.achievement-badge small{color:var(--ink-3);font-size:.58rem}.achievement-dialog{position:fixed;inset:0;margin:auto;width:min(520px,calc(100vw - 28px));border:0;border-radius:20px;padding:0;background:var(--surface);color:var(--ink);box-shadow:0 28px 90px rgba(0,0,0,.38)}.achievement-dialog::backdrop{background:rgba(7,10,17,.7);backdrop-filter:blur(4px)}.achievement-dialog-body{padding:22px}.achievement-dialog-head{display:flex;justify-content:space-between;gap:12px}.achievement-dialog-head span{font-size:2.2rem}.achievement-dialog-close{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;background:var(--surface-2);color:var(--ink);cursor:pointer}.achievement-dialog h3{margin:13px 0 7px}.achievement-dialog p{color:var(--ink-2);line-height:1.6}.achievement-dialog .achievement-dialog-status{padding:10px 12px;border-radius:11px;background:var(--accent-soft);color:var(--accent);font-size:.75rem;font-weight:800}
@media(max-width:900px){.achievement-hero{grid-template-columns:1fr}.achievement-summary{grid-template-columns:repeat(2,1fr)}.achievement-track{overflow-x:auto;grid-template-columns:repeat(6,120px);padding:5px 8px 14px}.achievement-track::before{left:48px;right:48px}.achievement-region:nth-child(even) .achievement-track{direction:ltr}.achievement-badge-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:620px){.student-results-page .wrap,.achievement-page .wrap{width:100%;padding-left:14px!important;padding-right:14px!important}.student-result-dialog{width:calc(100vw - 20px)}.achievement-hero{padding-top:22px}.achievement-hero-main{padding:20px}.achievement-hero-main h1{font-size:2rem}.achievement-summary{gap:7px}.achievement-region{padding:16px}.achievement-map-head{align-items:flex-start;flex-direction:column}.achievement-badge-grid{grid-template-columns:repeat(2,1fr)}}

/* Trình xem kết quả toàn màn hình: giữ ngữ cảnh bài học và quay lại danh sách bằng một nút rõ ràng. */
.student-result-dialog{box-sizing:border-box;position:fixed;inset:0!important;width:100vw!important;max-width:none!important;height:100dvh;max-height:none!important;margin:0!important;border-radius:0!important;background:var(--bg);overflow:hidden}.student-result-dialog::backdrop{background:rgba(8,10,13,.72);backdrop-filter:blur(4px)}.student-result-dialog-inner{box-sizing:border-box;width:100%;height:100%;max-height:none!important;padding:0!important;overflow:auto;overscroll-behavior:contain}.student-result-viewer-bar{position:sticky;z-index:10;top:0;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:66px;padding:10px max(22px,calc((100vw - 1380px)/2));border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--surface) 94%,transparent);box-shadow:0 8px 28px rgba(0,0,0,.08);backdrop-filter:blur(18px)}.student-result-viewer-context{min-width:0;display:flex;align-items:center;gap:13px}.student-result-viewer-kicker{flex:0 0 auto;padding:6px 9px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:.61rem;font-weight:900;letter-spacing:.1em}.student-result-viewer-crumbs{min-width:0;display:flex;align-items:center;gap:8px;color:var(--ink-3);font-size:.72rem}.student-result-viewer-crumbs strong{min-width:0;max-width:56vw;overflow:hidden;color:var(--ink);text-overflow:ellipsis;white-space:nowrap}.student-result-viewer-actions{display:flex;align-items:center;gap:9px;flex:0 0 auto}.student-result-dialog-close{width:auto!important;min-width:80px;height:40px!important;display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:0 13px;border-radius:11px!important;background:var(--surface)!important;font:800 .73rem/1 var(--font-sans);box-shadow:var(--shadow-sm)}.student-result-dialog-close span{font-size:1rem}.student-result-viewer-content{box-sizing:border-box;width:min(1380px,calc(100% - 44px));min-height:calc(100dvh - 66px);margin:0 auto;padding:30px 0 70px}.student-result-viewer-title{display:flex;align-items:end;justify-content:space-between;gap:24px;padding-bottom:18px;border-bottom:1px solid var(--line)}.student-result-viewer-title h2{margin:6px 0 0;font-size:clamp(1.45rem,2.4vw,2.35rem);line-height:1.2}.student-result-viewer-title p{max-width:520px;margin:0;color:var(--ink-3);font-size:.78rem;line-height:1.55}.student-result-viewer-content .student-result-dialog-meta{margin-top:16px}.student-result-viewer-content .student-result-feedback,.student-result-viewer-content .student-result-assessment-banner,.student-result-viewer-content .student-result-solution-ready{max-width:none}.student-result-viewer-content .student-result-file-section,.student-result-viewer-content .student-result-solution{padding:20px;border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:var(--shadow-sm)}.student-result-viewer-content .student-result-files{grid-template-columns:repeat(4,minmax(0,1fr))}.student-result-viewer-content .student-result-pdf{grid-column:1/-1}.student-result-viewer-content .student-result-pdf iframe{height:min(72vh,900px)}.student-result-viewer-content .student-result-solution .latex-document,.student-result-viewer-content .student-result-solution .latex-view{max-width:none!important}.student-result-viewer-content .student-result-inline-note{margin-bottom:0}
@media(max-width:760px){.student-result-viewer-bar{min-height:58px;padding:8px 12px}.student-result-viewer-kicker,.student-result-viewer-crumbs>span,.student-result-viewer-actions>a,.student-result-dialog-close b{display:none}.student-result-viewer-crumbs strong{max-width:60vw}.student-result-dialog-close{min-width:42px!important;width:42px!important;height:42px!important;padding:0}.student-result-viewer-content{width:100%;padding:20px 14px 52px}.student-result-viewer-title{align-items:flex-start;flex-direction:column;gap:8px}.student-result-viewer-title p{font-size:.72rem}.student-result-viewer-content .student-result-file-section,.student-result-viewer-content .student-result-solution{padding:13px}.student-result-viewer-content .student-result-files{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:460px){.student-result-viewer-content .student-result-files{grid-template-columns:1fr}.student-result-viewer-content .student-result-pdf{grid-column:auto}}

/* Ảnh kết quả mở trong thư viện dùng chung thay vì tab rời. */
button.student-result-file{font:inherit;text-align:left;cursor:zoom-in}
button.student-result-file:hover{border-color:var(--accent);box-shadow:0 7px 18px rgba(0,0,0,.08)}