:root{color:#07111f;background:#fff;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-synthesis:none;line-height:1.5;text-rendering:optimizeLegibility;--bg: #ffffff;--ink: #07111f;--muted: #627083;--line: #d8e1ea;--blue: #155ee8;--blue-2: #0f4fc9;--blue-soft: #eef5ff;--coral: #f06a3d;--coral-soft: #fff2ec;--green: #147a57;--green-soft: #e9f8f1;--panel: #ffffff;--shadow: 0 18px 42px rgb(16 24 39 / 10%);--radius: 8px}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(180deg,#f7fbff,#fff 270px),#fff}button,textarea{font:inherit}button{cursor:pointer}a{color:inherit}button:disabled{cursor:not-allowed}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--ink);letter-spacing:0}h1{max-width:820px;margin-bottom:10px;font-size:34px;line-height:1.12}h2{margin-bottom:0;font-size:20px;line-height:1.25}h3{margin-bottom:8px;font-size:18px;line-height:1.2}p{color:var(--muted);font-size:15px}.learner-app{width:min(1360px,100%);min-height:100vh;margin:0 auto;padding:22px 24px 44px}.access-gate{width:min(1180px,100%);min-height:100vh;margin:0 auto;padding:22px 24px 44px}.learner-header,.brand-line,.header-actions,.access-pill,.lesson-title-row,.video-status,.player-strip,.lesson-navigator,.resource-item,.submitted-state,.warning-box,.group-card,.empty-resource,.assignment-actions{display:flex;align-items:center}.learner-header{justify-content:space-between;gap:18px;min-height:58px;border-bottom:1px solid var(--line)}.brand-line{gap:12px}.brand-line strong,.brand-line span{display:block}.brand-line strong{font-size:15px;line-height:1.1}.brand-line span{color:var(--muted);font-size:12px;font-weight:800}.brand-mark{display:grid;width:38px;height:38px;place-items:center;color:#fff;font-size:13px;font-weight:900;background:var(--blue);border-radius:var(--radius)}.header-actions{gap:10px}.access-pill{gap:7px;min-height:34px;padding:7px 12px;color:var(--green);font-size:13px;font-weight:900;background:var(--green-soft);border:1px solid #bfe8d3;border-radius:999px}.course-summary{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:28px;align-items:end;padding:26px 0 22px}.access-hero{display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:34px;align-items:center;min-height:calc(100vh - 130px);padding:44px 0}.access-copy h1{max-width:760px}.access-copy p{max-width:720px}.access-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.access-points span{display:inline-flex;align-items:center;gap:7px;min-height:34px;padding:7px 10px;color:var(--blue);font-size:13px;font-weight:900;background:var(--blue-soft);border:1px solid #cadcff;border-radius:var(--radius)}.eyebrow{margin:0 0 8px;color:var(--blue);font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.progress-card,.support-banner,.lesson-main,.lesson-sidebar,.study-panel,.surface-panel,.activation-card,.info-block,.resource-item,.group-card,.score-card,.completion-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}.progress-card{padding:16px;box-shadow:0 12px 30px #155ee814}.activation-card{display:grid;gap:14px;padding:18px;box-shadow:var(--shadow)}.auth-card{align-content:start}.auth-tabs{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;padding:5px;background:#f4f7fb;border:1px solid var(--line);border-radius:var(--radius)}.auth-tabs button{min-height:34px;color:var(--muted);font-size:13px;font-weight:900;background:transparent;border:0;border-radius:6px}.auth-tabs button.active{color:var(--blue);background:#fff;box-shadow:0 6px 16px #10182714}.auth-form{display:grid;gap:13px}.auth-actions{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:9px;align-items:center}.signed-user{display:inline-flex;align-items:center;gap:8px;min-height:38px;padding:8px 11px;color:var(--green);font-size:13px;font-weight:900;background:var(--green-soft);border:1px solid #bfe8d3;border-radius:var(--radius)}.auth-status{padding:10px 11px;font-size:13px;font-weight:800;border-radius:var(--radius)}.auth-status.calm{color:var(--blue);background:var(--blue-soft);border:1px solid #caddff}.auth-status.success{color:var(--green);background:var(--green-soft);border:1px solid #bfe8d3}.auth-status.warning{color:#9a3f22;background:var(--coral-soft);border:1px solid #ffd6c7}.access-choice,.purchase-panel,.purchase-methods,.order-summary{display:grid;gap:10px}.access-choice-button{display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px;align-items:center;min-height:76px;padding:12px;color:var(--ink);text-align:left;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.access-choice-button svg{color:var(--blue)}.access-choice-button strong,.access-choice-button small,.purchase-method strong,.purchase-method span{display:block}.access-choice-button strong{margin-bottom:4px;font-size:14px;font-weight:900}.access-choice-button small,.purchase-method span{color:var(--muted);font-size:12px;font-weight:800;line-height:1.45}.access-choice-button:hover{background:var(--blue-soft);border-color:#bdd0ff}.purchase-method{padding:11px;background:#f8fafc;border:1px solid var(--line);border-radius:var(--radius)}.purchase-method strong{margin-bottom:4px;color:var(--blue);font-size:13px;font-weight:900}.order-summary{padding:11px;color:var(--green);background:var(--green-soft);border:1px solid #bfe8d3;border-radius:var(--radius)}.order-summary span,.order-summary small{display:block;color:var(--muted);font-size:12px;font-weight:800}.order-summary strong{font-size:16px;font-weight:900}.demo-link{display:inline-flex;align-items:center;justify-content:center;gap:6px;color:var(--muted);font-size:13px;font-weight:900;text-decoration:none}.inline-button{width:fit-content;margin:0 auto;background:transparent;border:0}.activation-card label{display:grid;gap:7px;color:var(--ink);font-size:13px;font-weight:900}.activation-card input{width:100%;min-height:44px;padding:10px 12px;color:var(--ink);font:inherit;font-weight:800;background:#fff;border:1px solid var(--line);border-radius:var(--radius);outline:none}.activation-card input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #155ee81f}.activation-card small{color:var(--muted);font-size:12px;font-weight:800}.progress-card span,.progress-card small{display:block;color:var(--muted);font-size:12px;font-weight:800}.progress-card strong{display:block;margin:8px 0;color:var(--blue);font-size:34px;line-height:1}.progress-track{width:100%;height:8px;overflow:hidden;background:#e8eef5;border-radius:999px}.progress-track span{display:block;height:100%;background:linear-gradient(90deg,var(--blue),#19a0ff);border-radius:inherit}.support-banner,.review-banner{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:12px;margin-bottom:16px;background:#f8fbff;border:1px solid var(--line)}.review-banner{background:linear-gradient(90deg,var(--green-soft),#ffffff);border:1px solid #bfe8d3}.support-banner h2,.review-banner h2{margin:4px 0;font-size:16px}.learning-shell{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:18px;align-items:start}.lesson-main{min-width:0;padding:18px}.lesson-title-row{justify-content:space-between;gap:16px;margin-bottom:14px}.tag{display:inline-flex;align-items:center;min-height:24px;padding:4px 9px;color:var(--blue);font-size:12px;font-weight:900;background:var(--blue-soft);border:1px solid #cadcff;border-radius:999px}.primary-button,.secondary-button,.ghost-button,.icon-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:36px;padding:8px 13px;color:var(--ink);font-size:13px;font-weight:900;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:background .14s ease,border-color .14s ease,transform .14s ease,box-shadow .14s ease}.primary-button{color:#fff;background:var(--blue);border-color:var(--blue);box-shadow:0 12px 28px #155ee838}.primary-button:hover{background:var(--blue-2)}.secondary-button:hover,.ghost-button:hover,.icon-button:hover{background:var(--blue-soft);border-color:#bdd0ff}.primary-button:disabled,.secondary-button:disabled{opacity:.56}.ghost-button{min-height:34px;color:var(--blue);background:#fff;text-decoration:none}.icon-button{width:38px;min-width:38px;height:38px;padding:0}.lesson-focus{display:grid;grid-template-columns:minmax(0,1fr);gap:12px}.surface-actions{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px;margin-bottom:12px}.video-panel{display:grid;gap:10px;min-width:0}.video-shell{position:relative;display:grid;aspect-ratio:16 / 9;width:100%;place-items:center;overflow:hidden;color:#fff;text-align:center;background:radial-gradient(circle at 20% 18%,rgb(25 160 255 / 34%),transparent 24%),linear-gradient(rgb(255 255 255 / 7%) 1px,transparent 1px),linear-gradient(90deg,rgb(255 255 255 / 7%) 1px,transparent 1px),linear-gradient(135deg,#07111f,#0c2853,#07111f);background-size:auto,42px 42px,42px 42px,auto;border:0;border-radius:var(--radius);box-shadow:inset 0 0 0 1px #ffffff1f;cursor:pointer}.video-cover{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;align-content:space-between;justify-items:stretch;padding:clamp(18px,3vw,34px);background:linear-gradient(90deg,#07111feb,#07111fb3 46%,#07111f42),radial-gradient(circle at 78% 22%,rgb(240 106 61 / 46%),transparent 24%),radial-gradient(circle at 78% 78%,rgb(25 160 255 / 42%),transparent 28%),linear-gradient(135deg,#07111f,#123b68 55%,#122034)}.video-cover:after{position:absolute;top:0;right:0;bottom:0;left:0;content:"";background:linear-gradient(rgb(255 255 255 / 8%) 1px,transparent 1px),linear-gradient(90deg,rgb(255 255 255 / 8%) 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:linear-gradient(90deg,black,transparent 78%);mask-image:linear-gradient(90deg,black,transparent 78%);pointer-events:none}.video-cover-topline{position:relative;z-index:1;display:flex;justify-content:space-between;gap:12px;color:#ffffffc2;font-size:12px;font-weight:900}.video-cover-main{position:relative;z-index:1;display:grid;max-width:72%;gap:10px;text-align:left}.video-cover-index{width:fit-content;padding:6px 9px;color:#07111f;font-size:12px;font-weight:900;background:#fff;border-radius:999px}.video-cover-main h3{max-width:760px;margin:0;color:#fff;font-size:clamp(24px,3vw,42px);line-height:1.1}.video-cover-main p{max-width:620px;margin:0;color:#ffffffd1;font-size:clamp(13px,1.4vw,16px);font-weight:800;line-height:1.7}.video-shell.playing{background:radial-gradient(circle at 22% 22%,rgb(21 94 232 / 62%),transparent 28%),radial-gradient(circle at 80% 78%,rgb(240 106 61 / 32%),transparent 20%),linear-gradient(rgb(255 255 255 / 7%) 1px,transparent 1px),linear-gradient(90deg,rgb(255 255 255 / 7%) 1px,transparent 1px),linear-gradient(135deg,#07111f,#0c2853,#07111f)}.video-shell.has-player{display:block;background:#05070a;cursor:default}.tc-player-host,.tc-player-host .tc-player-video,.video-shell.has-player .tcp-skin,.video-shell.has-player .vjs-tech{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.tc-player-host,.tc-player-host .tc-player-video{display:block;background:#05070a}.video-focus{position:absolute;top:0;right:0;bottom:0;left:0;z-index:2;display:grid;gap:12px;justify-items:center;place-content:center;font-weight:900;pointer-events:none}.play-circle{display:grid;width:74px;height:74px;place-items:center;color:var(--blue);background:#fff;border-radius:999px;box-shadow:0 22px 52px #00000057}.video-status{position:absolute;z-index:3;padding:7px 10px;color:#ffffffd1;font-size:12px;font-weight:800;background:#07111f94;border:1px solid rgb(255 255 255 / 16%);border-radius:var(--radius)}.video-status{top:14px;left:14px;display:inline-flex;gap:7px;align-items:center;pointer-events:none}.player-strip{justify-content:space-between;gap:14px;padding:10px 12px;background:#f8fbff;border:1px solid var(--line);border-radius:var(--radius)}.player-strip>div:first-child{display:grid;width:min(460px,100%);gap:6px}.player-strip span{color:var(--muted);font-size:12px;font-weight:800}.speed-group{display:inline-grid;grid-template-columns:repeat(3,44px);gap:4px;padding:4px;background:#eaf1fb;border-radius:var(--radius)}.speed-group button{min-height:30px;color:var(--muted);font-size:12px;font-weight:900;background:transparent;border:0;border-radius:6px}.speed-group button.active{color:var(--blue);background:#fff;box-shadow:0 5px 14px #1018271a}.lesson-next{display:grid;grid-template-columns:minmax(0,1fr) auto;align-content:start;align-items:center;gap:10px 18px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.lesson-next .eyebrow,.lesson-next h3,.lesson-next p{grid-column:1}.lesson-next h3,.lesson-next p{margin-bottom:0}.next-actions{display:grid;grid-column:2;grid-row:1 / span 3;grid-template-columns:repeat(3,minmax(112px,auto));gap:8px}.mini-checks{display:flex;grid-column:1 / -1;flex-wrap:wrap;gap:8px 14px;padding-top:10px;border-top:1px solid var(--line)}.mini-checks span{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:13px;font-weight:800}.mini-checks .done{color:var(--green)}.lesson-chip{display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;align-items:center;gap:7px;min-height:42px;padding:8px 10px;color:var(--muted);font-weight:900;text-align:left;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.lesson-chip-index{color:inherit;font-size:12px;white-space:nowrap}.lesson-chip strong{overflow:hidden;color:var(--ink);font-size:12px;font-weight:900;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.lesson-chip.selected{color:#fff;background:var(--blue);border-color:var(--blue)}.lesson-chip.selected strong{color:#fff}.lesson-chip-status{justify-self:end;padding:4px 7px;font-size:11px;line-height:1;white-space:nowrap;border-radius:999px}.lesson-chip-status.submitted{color:var(--blue);background:var(--blue-soft)}.lesson-chip-status.reviewed{color:#326349;background:var(--green-soft)}.lesson-chip-status.excellent{color:#9a3f22;background:var(--coral-soft)}.lesson-chip-status.revision{color:#a05a00;background:#fff3cf}.lesson-chip.selected .lesson-chip-status{color:var(--ink);background:#fff}.study-panel{overflow:hidden}.panel-tabs{display:grid;grid-template-columns:repeat(3,1fr);padding:6px;background:#f4f7fb;border-bottom:1px solid var(--line)}.panel-tabs button{min-height:38px;color:var(--muted);font-size:13px;font-weight:900;background:transparent;border:0;border-radius:7px}.panel-tabs button.active{color:var(--blue);background:#fff;box-shadow:0 6px 16px #10182714}.panel-content{padding:16px}.panel-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:12px}.panel-heading small{max-width:360px;color:var(--muted);font-size:12px;text-align:right}.resource-list{display:grid;gap:8px}.resource-item{display:grid;grid-template-columns:36px minmax(0,1fr) auto;gap:12px;min-height:64px;padding:10px}.resource-item>svg{display:grid;width:34px;height:34px;padding:8px;color:var(--blue);background:var(--blue-soft);border-radius:var(--radius)}.resource-item strong,.info-block strong,.rail-card strong{display:block;color:var(--ink);font-size:14px}.resource-item span,.resource-item small,.info-block span,.rail-card span,.empty-resource{color:var(--muted);font-size:13px}.resource-copy-text{max-height:260px;padding:10px 12px;margin:8px 0 0;overflow:auto;color:#253044;font:12px/1.65 ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;white-space:pre-wrap;overflow-wrap:anywhere;background:#f8fbff;border:1px solid var(--line);border-radius:var(--radius)}.resource-item small{display:block;margin-top:2px;font-weight:800}.resource-actions{display:inline-grid;grid-template-columns:repeat(2,auto);gap:6px;align-items:center}.material-preview{display:grid;gap:14px}.material-preview pre{max-height:min(62vh,680px);padding:14px;overflow:auto;color:#253044;font:13px/1.75 ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;white-space:pre-wrap;background:#f8fbff;border:1px solid var(--line);border-radius:var(--radius)}.empty-resource{gap:8px;min-height:54px;padding:12px;background:#f8fbff;border-radius:var(--radius)}.points-panel ol{display:grid;gap:10px;padding:0;margin:0;list-style:none;counter-reset:point}.points-panel li{display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;color:#253044;font-size:14px;counter-increment:point}.points-panel li:before{content:counter(point);display:grid;width:26px;height:26px;place-items:center;color:var(--coral);font-weight:900;border-top:1px solid var(--coral)}.lesson-sidebar{position:sticky;top:16px;display:grid;align-content:start;gap:10px;padding:12px}.lesson-sidebar-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:4px 2px 2px}.lesson-sidebar-heading .eyebrow{margin:0}.lesson-sidebar-heading strong{color:var(--muted);font-size:13px}.lesson-navigator{display:grid;grid-template-columns:1fr;gap:8px}.rail-card{display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px;width:100%;min-height:82px;padding:12px;text-align:left;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.rail-card svg{color:var(--blue)}.rail-card span{grid-column:2}.rail-card.attention{border-color:#bfe8d3;background:var(--green-soft)}.rail-card:disabled{cursor:default;opacity:.72}.surface-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30;display:grid;align-items:start;justify-items:end;padding:18px;background:#07111f52;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.surface-panel{display:grid;grid-template-rows:auto minmax(0,1fr);width:min(560px,100%);max-height:calc(100vh - 36px);overflow:hidden;box-shadow:var(--shadow)}.surface-panel.compact{grid-template-rows:auto auto;width:min(430px,100%)}.surface-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px;border-bottom:1px solid var(--line)}.surface-panel.compact .surface-header,.surface-panel.compact .surface-body{padding:14px}.surface-body{display:grid;gap:14px;align-content:start;min-height:0;overflow:auto;padding:18px}.surface-grid.two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.info-block{padding:13px;background:#f8fbff}.phrase-card{display:grid;gap:8px;padding:18px;color:#fff;background:radial-gradient(circle at top right,rgb(255 255 255 / 28%),transparent 26%),linear-gradient(135deg,var(--blue),var(--blue-2));border-radius:var(--radius)}.support-surface .phrase-card{padding:14px}.phrase-card span,.phrase-card small{color:#ffffffc7;font-size:13px;font-weight:800}.phrase-card strong{font-size:36px;letter-spacing:.12em}.support-surface .phrase-card strong{font-size:22px;line-height:1.35;letter-spacing:0}.surface-panel.compact .surface-grid.two{grid-template-columns:1fr}.locked-hero{display:grid;grid-template-columns:44px minmax(0,1fr);gap:12px;padding:14px;background:var(--coral-soft);border:1px solid #ffd6c7;border-radius:var(--radius)}.locked-hero svg{color:var(--coral)}.unlock-list,.resource-pack-list,.final-checklist{display:grid;gap:8px}.unlock-list span,.resource-pack-list span,.final-checklist span{display:inline-flex;align-items:center;gap:8px;min-height:34px;padding:8px 10px;color:#253044;font-size:13px;font-weight:800;background:#f8fbff;border:1px solid var(--line);border-radius:var(--radius)}.warning-box,.submitted-state{gap:10px;align-items:flex-start;padding:13px;font-size:14px;font-weight:800;border-radius:var(--radius)}.warning-box{color:#9a3f22;background:var(--coral-soft);border:1px solid #ffd6c7}.warning-box.calm{color:var(--blue);background:var(--blue-soft);border-color:#caddff}.submitted-state{color:var(--green);background:var(--green-soft);border:1px solid #bfe8d3}.group-card{gap:12px;padding:14px;background:#f8fbff}.group-card strong,.group-card span{display:block}.completion-card,.score-card{display:grid;gap:9px;padding:14px;background:#f8fbff}.review-card{display:grid;gap:10px;padding:14px;background:#f8fbff;border:1px solid var(--line);border-radius:var(--radius)}.review-card.revision{background:#fffaf0;border-color:#ffd98d}.review-card.excellent{background:var(--green-soft);border-color:#bfe8d3}.review-card-heading{display:flex;justify-content:space-between;gap:10px;align-items:center}.review-card-heading span{font-size:14px;font-weight:900}.review-card-heading small{color:var(--muted);font-size:12px;font-weight:800}.feedback-text,.score-feedback{display:grid;gap:8px}.feedback-text p,.score-feedback p{margin:0;line-height:1.65;white-space:pre-wrap;overflow-wrap:anywhere}.feedback-expand-button{justify-self:start;padding:0;color:var(--blue);font-size:13px;font-weight:900;background:transparent;border:0}.score-card strong{color:var(--blue);font-size:54px;line-height:1}.score-card.excellent{background:var(--green-soft);border:1px solid #bfe8d3}.score-card.revision{background:#fffaf0;border:1px solid #ffd98d}.score-feedback{padding-top:8px;border-top:1px solid rgb(37 48 68 / 10%)}.prompt-copy-panel{display:grid;gap:10px;padding:13px;background:#f8fbff;border:1px solid var(--line);border-radius:var(--radius)}.prompt-copy-panel strong,.prompt-copy-panel span{display:block}.prompt-copy-panel span{margin-top:3px;color:var(--muted);font-size:13px;font-weight:700}.prompt-copy-panel textarea{min-height:180px;font-size:13px}textarea{width:100%;min-height:130px;padding:13px;color:var(--ink);resize:vertical;background:#fff;border:1px solid var(--line);border-radius:var(--radius);outline:none}textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px #155ee81f}.assignment-actions{justify-content:flex-end;gap:10px}.attachment-picker{display:grid;gap:10px;padding:12px;background:#f8fbff;border:1px solid var(--line);border-radius:var(--radius)}.attachment-picker-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.attachment-picker-row span{color:var(--muted);font-size:12px;font-weight:800;line-height:1.45}.attachment-list{display:grid;gap:8px}.attachment-chip{display:grid;grid-template-columns:auto minmax(0,1fr) auto auto;align-items:center;gap:8px;min-height:38px;padding:8px 9px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.attachment-chip span{overflow:hidden;color:var(--ink);font-size:13px;font-weight:850;text-overflow:ellipsis;white-space:nowrap}.attachment-chip small{color:var(--muted);font-size:12px;font-weight:800;white-space:nowrap}@media(min-width:1121px){.surface-actions{grid-template-columns:repeat(5,minmax(0,1fr))}}@media(max-width:1120px){.video-cover-main{max-width:82%}.video-cover-main p,.video-focus span{display:none}.video-focus{transform:translateY(-18%)}}@media(max-width:980px){.learning-shell,.lesson-focus{grid-template-columns:1fr}.lesson-sidebar{position:static}.lesson-navigator,.surface-actions{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:760px){.learner-app{padding:16px}.learner-header,.course-summary,.support-banner,.review-banner,.lesson-title-row,.player-strip,.panel-heading,.attachment-picker-row,.assignment-actions{align-items:stretch;flex-direction:column}.course-summary{display:grid;grid-template-columns:1fr}.access-hero{grid-template-columns:1fr;gap:20px;min-height:auto;padding:26px 0}h1{font-size:27px}.video-cover{padding:16px}.video-cover-main{max-width:100%;gap:8px}.video-cover-index{display:none}.video-cover-main h3{display:-webkit-box;overflow:hidden;font-size:clamp(18px,5.2vw,22px);-webkit-box-orient:vertical;-webkit-line-clamp:2}.play-circle{width:58px;height:58px}.header-actions,.lesson-sidebar,.lesson-navigator,.surface-actions,.surface-grid.two{grid-template-columns:1fr}.header-actions{display:grid}.auth-actions{grid-template-columns:1fr}.lesson-main{padding:14px}.lesson-next{grid-template-columns:1fr}.lesson-next .eyebrow,.lesson-next h3,.lesson-next p,.next-actions,.mini-checks{grid-column:1;grid-row:auto}.next-actions{grid-template-columns:1fr}.resource-item{grid-template-columns:34px minmax(0,1fr)}.resource-actions{grid-column:1 / -1;grid-template-columns:1fr}.resource-actions .secondary-button{width:100%}.surface-backdrop{justify-items:stretch;padding:0}.surface-panel{width:100%;max-height:100vh;border-radius:0}}
