:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f6f7fb;--panel:#fff;--panel-soft:#eef5f4;--ink:#17202a;--muted:#667085;--line:#d8dee8;--line-strong:#bcc7d6;--primary:#176b87;--primary-dark:#0f5168;--primary-soft:#e7f3f5;--accent:#d45d3f;--good:#217a57;--warn:#b7791f;--danger:#b42318;--violet:#5b4bb7;--shadow:0 18px 42px #17202a14;--radius:8px;--font:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}*{box-sizing:border-box}body{background:linear-gradient(180deg, #176b8714, #f6f7fb00 300px), var(--bg);min-height:100vh;color:var(--ink);font-family:var(--font);margin:0;line-height:1.5}button,input,select,textarea{font:inherit}button{border:0}.app-shell{min-height:100vh}.topbar{z-index:20;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffe0;border-bottom:1px solid #d8dee8db;position:sticky;top:0}.topbar-inner{justify-content:space-between;align-items:center;gap:16px;width:min(1180px,100% - 32px);margin:0 auto;padding:14px 0;display:flex}.brand{align-items:center;gap:12px;min-width:0;display:flex}.brand-mark{border-radius:var(--radius);background:var(--primary);color:#fff;letter-spacing:0;place-items:center;width:40px;height:40px;font-weight:800;display:grid}.brand-title{color:var(--ink);margin:0;font-size:1.03rem;font-weight:780}.brand-subtitle{color:var(--muted);margin:1px 0 0;font-size:.82rem}.topbar-meta{border:1px solid var(--line);border-radius:var(--radius);min-height:36px;color:var(--muted);white-space:nowrap;background:#fff;align-items:center;gap:8px;padding:0 10px;font-size:.82rem;display:inline-flex}.topbar-meta strong{color:var(--ink);font-size:.84rem}.mode-switch{border:1px solid var(--line);border-radius:var(--radius);background:#f9fafc;gap:4px;padding:4px;display:flex}.mode-switch button,.tabbar button{min-height:36px;color:var(--muted);cursor:pointer;white-space:nowrap;background:0 0;border-radius:6px;padding:0 12px}.mode-switch button.active,.tabbar button.active{background:var(--ink);color:#fff}.page{width:min(1180px,100% - 32px);margin:0 auto;padding:24px 0 42px}.workspace-overview{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:linear-gradient(135deg,#176b871f,#d45d3f14),#fff;grid-template-columns:minmax(0,1fr) 540px;align-items:stretch;gap:18px;margin-bottom:18px;padding:22px;display:grid}.overview-copy{align-content:center;gap:8px;display:grid}.eyebrow{color:var(--primary-dark);letter-spacing:0;text-transform:uppercase;font-size:.76rem;font-weight:820}.overview-copy h1{letter-spacing:0;max-width:680px;margin:0;font-size:clamp(1.65rem,3vw,2.65rem);line-height:1.08}.overview-copy p{max-width:620px;color:var(--muted);margin:0}.overview-metrics,.tracker-summary,.insight-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.summary-card{border:1px solid var(--line);border-radius:var(--radius);background:#ffffffd1;min-height:106px;padding:14px}.summary-card span,.summary-card small{color:var(--muted);font-size:.78rem;font-weight:680;display:block}.summary-card strong{color:var(--ink);margin:7px 0 3px;font-size:clamp(1.15rem,2vw,1.45rem);line-height:1.12;display:block}.dashboard-grid{grid-template-columns:340px 1fr;align-items:start;gap:18px;display:grid}.panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow)}.panel-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:start;gap:12px;padding:18px 18px 12px;display:flex}.panel-header h2,.panel-header h3{margin:0;font-size:1rem}.panel-header p{color:var(--muted);margin:4px 0 0;font-size:.88rem}.panel-body{padding:18px}.tabbar{flex-wrap:wrap;gap:6px;margin-bottom:16px;display:flex}.program-list{gap:10px;display:grid}.filter-row,.preset-row{flex-wrap:wrap;gap:8px;margin-bottom:14px;display:flex}.filter-chip{border:1px solid var(--line);min-height:34px;color:var(--muted);cursor:pointer;background:#fff;border-radius:999px;padding:0 10px;font-size:.84rem;font-weight:740}.exercise-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);width:100%;color:inherit;cursor:pointer;text-align:left;padding:13px;transition:border-color .16s,transform .16s,background .16s}.exercise-card:hover{border-color:var(--primary);transform:translateY(-1px)}.exercise-card.active{border-color:var(--primary);background:var(--primary-soft)}.exercise-card-title{margin:0;font-weight:760}.exercise-card-meta{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.pill{border:1px solid var(--line);min-height:24px;color:var(--muted);background:#fff;border-radius:999px;align-items:center;padding:2px 8px;font-size:.78rem;font-weight:650;display:inline-flex}.pill.primary{background:var(--primary-soft);color:var(--primary-dark);border-color:#176b873d}.pill.good{color:var(--good);background:#eaf6f1;border-color:#217a5738}.pill.warn{color:var(--warn);background:#fff6e6;border-color:#b7791f38}.detail-layout{grid-template-columns:minmax(0,1fr) 300px;gap:18px;display:grid}.brief-panel{border-radius:var(--radius);background:var(--primary-soft);border:1px solid #176b872e;grid-template-columns:minmax(0,1fr) 280px;gap:12px;margin:14px 0 18px;padding:14px;display:grid}.brief-panel strong{margin-top:4px;display:block}.brief-panel p{color:var(--primary-dark);margin:6px 0 0;font-size:.9rem}.readiness-list{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:12px}.readiness-list.compact{background:#fbfcfe}.readiness-list span{color:var(--ink);margin-bottom:6px;font-size:.82rem;font-weight:780;display:block}.readiness-list ul{color:var(--muted);gap:6px;margin:0;padding-left:18px;font-size:.86rem;display:grid}.preview-text{border:1px solid var(--line);border-radius:var(--radius);background:#fbfcfe;max-height:430px;padding:16px;font-size:1rem;overflow:auto}.question-list{gap:12px;margin-top:16px;display:grid}.question-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:14px}.question-card h4{margin:0 0 10px;font-size:.95rem}.option-list{gap:7px;display:grid}.option-line{color:var(--muted);align-items:baseline;gap:8px;font-size:.92rem;display:flex}.answer-key{color:var(--good);margin-top:10px;font-size:.86rem;font-weight:700}.side-actions{gap:10px;display:grid}.assignment-card{border-radius:var(--radius);background:#fff6f2;border:1px solid #d45d3f33;gap:5px;padding:12px;display:grid}.assignment-card span,.assignment-card small{color:#8a3b27;font-size:.78rem;font-weight:700}.assignment-card strong{color:var(--ink)}.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.metric{border:1px solid var(--line);border-radius:var(--radius);background:#fbfcfe;min-height:78px;padding:13px}.metric-value{color:var(--ink);font-size:1.35rem;font-weight:800}.metric-label{color:var(--muted);font-size:.78rem;font-weight:680}.button,.ghost-button,.danger-button{cursor:pointer;border-radius:7px;justify-content:center;align-items:center;gap:8px;min-height:40px;padding:0 14px;font-weight:740;text-decoration:none;transition:transform .16s,background .16s,border-color .16s;display:inline-flex}.button{background:var(--primary);color:#fff}.button:hover,.ghost-button:hover,.danger-button:hover{transform:translateY(-1px)}.button.good{background:var(--good)}.ghost-button{border:1px solid var(--line-strong);color:var(--ink);background:#fff}.danger-button{color:var(--danger);background:#fff1ef;border:1px solid #b423183d}.button-row{flex-wrap:wrap;gap:10px;display:flex}.field-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.field{gap:7px;display:grid}.field.full{grid-column:1/-1}.field label{color:var(--ink);font-size:.84rem;font-weight:760}.field input,.field select,.field textarea{border:1px solid var(--line-strong);width:100%;min-height:40px;color:var(--ink);background:#fff;border-radius:7px;outline:none;padding:9px 10px}.field textarea{resize:vertical;min-height:110px}.builder-layout{grid-template-columns:minmax(0,1fr) 290px;align-items:start;gap:18px;display:grid}.builder-inspector{gap:10px;display:grid;position:sticky;top:92px}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px #176b8721}.helper-text{color:var(--muted);font-size:.84rem}.status-note{border-radius:var(--radius);background:var(--primary-soft);color:var(--primary-dark);border:1px solid #176b8738;padding:12px;font-size:.9rem}.status-note.warn{color:#7c4f0d;background:#fff7e8;border-color:#b7791f47}.student-shell{width:min(900px,100% - 32px);margin:0 auto;padding:24px 0 44px}.student-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow);overflow:hidden}.student-card-head{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:14px;padding:18px;display:flex}.student-card-head h1{margin:0;font-size:clamp(1.24rem,2.6vw,1.8rem)}.student-card-head p{color:var(--muted);margin:5px 0 0}.timer-box{border:1px solid var(--line);border-radius:var(--radius);background:#fbfcfe;place-items:center;min-width:104px;min-height:72px;padding:8px 12px;display:grid}.timer-box.urgent{background:#fff1ef;border-color:#b4231847}.timer-box.urgent .timer-value{color:var(--danger)}.timer-value{font-variant-numeric:tabular-nums;color:var(--primary-dark);font-size:1.55rem;font-weight:860}.timer-label{color:var(--muted);font-size:.72rem;font-weight:740}.student-body{padding:18px}.reading-stage{gap:16px;display:grid}.reading-text{border:1px solid var(--line);border-radius:var(--radius);background:#fcfdff;max-height:min(58vh,560px);padding:20px;font-size:clamp(1.02rem,1.8vw,1.22rem);line-height:1.85;overflow:auto}.reading-text.hidden{min-height:230px;color:var(--muted);text-align:center;place-items:center;display:grid}.word-marker{display:inline}.word-marker sup{color:var(--accent);margin-left:2px;font-size:.58rem;font-weight:800}.progress-strip{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-bottom:16px;display:grid}.step-chip{border:1px solid var(--line);border-radius:var(--radius);background:var(--line);min-height:38px;color:var(--muted);grid-template-columns:auto minmax(0,1fr);align-items:center;gap:7px;padding:7px 8px;display:grid}.step-chip span{width:22px;height:22px;color:inherit;background:#fff;border-radius:999px;place-items:center;font-size:.76rem;font-weight:840;display:grid}.step-chip strong{text-overflow:ellipsis;white-space:nowrap;font-size:.78rem;overflow:hidden}.step-chip.active{background:var(--primary);border-color:var(--primary);color:#fff}.step-chip.active span{color:var(--primary-dark)}.quiz-options{gap:8px;display:grid}.quiz-toolbar{border:1px solid var(--line);border-radius:var(--radius);min-height:42px;color:var(--muted);background:#fbfcfe;justify-content:space-between;align-items:center;gap:12px;padding:9px 12px;font-weight:720;display:flex}.quiz-toolbar strong{color:var(--ink);font-variant-numeric:tabular-nums}.quiz-option{border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:7px;align-items:start;gap:10px;min-height:44px;padding:10px;display:flex}.quiz-option input{margin-top:4px}.quiz-option:has(input:checked){border-color:var(--primary);background:var(--primary-soft)}.result-box{gap:16px;display:grid}.score-band{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.insight-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.result-report{white-space:pre-wrap;border:1px solid var(--line);border-radius:var(--radius);color:#2b3440;background:#fbfcfe;padding:14px;font-size:.9rem}.table-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow-x:auto}.tracker-summary{grid-template-columns:repeat(4,minmax(0,1fr));margin-bottom:14px}table{border-collapse:collapse;background:#fff;width:100%;min-width:700px}th,td{border-bottom:1px solid var(--line);text-align:left;padding:10px 12px;font-size:.88rem}th{color:var(--muted);text-transform:uppercase;background:#f7f9fc;font-size:.78rem}tr:last-child td{border-bottom:0}.empty-state{border:1px dashed var(--line-strong);border-radius:var(--radius);min-height:240px;color:var(--muted);text-align:center;place-items:center;padding:24px;display:grid}.toast{z-index:40;border-radius:var(--radius);background:var(--ink);color:#fff;max-width:min(420px,100% - 36px);box-shadow:var(--shadow);padding:12px 14px;font-size:.9rem;position:fixed;bottom:18px;right:18px}@media (width<=920px){.dashboard-grid,.detail-layout,.workspace-overview,.builder-layout,.brief-panel{grid-template-columns:1fr}.overview-metrics,.tracker-summary{grid-template-columns:repeat(2,minmax(0,1fr))}.topbar-inner{flex-direction:column;align-items:flex-start}.mode-switch{width:100%}.mode-switch button{flex:1}.topbar-meta{justify-content:space-between;width:100%}.builder-inspector{position:static}}@media (width<=640px){.page,.student-shell,.topbar-inner{width:min(100% - 20px,1180px)}.panel-header,.student-card-head{flex-direction:column;align-items:stretch}.field-grid,.score-band,.overview-metrics,.tracker-summary,.insight-grid,.progress-strip,.metric-grid{grid-template-columns:1fr}.workspace-overview{padding:16px}.step-chip{grid-template-columns:auto minmax(0,1fr)}.button,.ghost-button,.danger-button{width:100%}.quiz-toolbar{flex-direction:column;align-items:stretch}}:root{--bg:#f3f5f2;--panel:#fff;--panel-soft:#eef3ef;--ink:#141a17;--muted:#68746f;--line:#d9e0dc;--line-strong:#bac8c1;--primary:#244f3f;--primary-dark:#17382c;--primary-soft:#e8f1ec;--accent:#b7633b;--good:#27664b;--warn:#9a6a19;--danger:#a83228;--violet:#4f5c99;--shadow:0 20px 50px #141a1714}body{background:linear-gradient(180deg, #244f3f14, #f3f5f200 360px), radial-gradient(circle at 82% 0%, #b7633b1a, #b7633b00 280px), var(--bg)}.topbar-premium{background:#ffffffe6;border-bottom:1px solid #d9e0dceb}.topbar-inner{width:min(1360px,100% - 40px);padding:12px 0}.brand-mark{background:var(--ink);box-shadow:inset 0 0 0 1px #ffffff2e}.brand-title{letter-spacing:0;font-size:1rem}.brand-subtitle{font-size:.78rem}.topbar-meta{background:#f8faf8;border-color:#d9e0dccc}.mode-switch{background:#eef3ef}.account-chip{border-radius:var(--radius);background:#f8faf8;border:1px solid #d9e0dce6;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:8px;max-width:min(460px,42vw);min-height:38px;padding:4px 5px 4px 10px;display:grid}.account-chip span{color:var(--primary-dark);text-transform:uppercase;font-size:.74rem;font-weight:850}.account-chip strong{color:var(--ink);text-overflow:ellipsis;white-space:nowrap;font-size:.84rem;overflow:hidden}.account-chip a,.account-chip button{background:var(--primary-dark);color:#fff;cursor:pointer;border:0;border-radius:6px;justify-content:center;align-items:center;min-height:30px;padding:0 9px;font-size:.8rem;font-weight:760;text-decoration:none;display:inline-flex}.auth-shell{background:linear-gradient(180deg, #244f3f1a, #f3f5f200 360px), var(--bg);place-items:center;min-height:100vh;padding:40px 18px;display:grid}.auth-card{border-radius:var(--radius);background:linear-gradient(135deg,#fffffffa,#e8f1ece6),#fff;border:1px solid #d9e0dcf0;gap:24px;width:min(980px,100%);padding:clamp(20px,4vw,34px);display:grid;box-shadow:0 28px 70px #141a171a}.auth-brand{align-items:center;gap:12px;display:flex}.auth-copy{gap:8px;max-width:720px;display:grid}.auth-copy h1{color:var(--ink);margin:0;font-size:clamp(1.65rem,4vw,3rem);line-height:1.05}.auth-copy p{max-width:620px;color:var(--muted);margin:0}.auth-grid{grid-template-columns:minmax(0,1fr) minmax(0,.82fr);gap:14px;display:grid}.auth-panel{border-radius:var(--radius);background:#ffffffdb;border:1px solid #d9e0dcf2;align-content:start;gap:13px;padding:18px;display:grid}.auth-panel div{gap:2px;margin-bottom:2px;display:grid}.auth-panel span{color:var(--muted);letter-spacing:0;text-transform:uppercase;font-size:.74rem;font-weight:820}.auth-panel strong{color:var(--ink);font-size:1.08rem}.auth-panel label{gap:6px;display:grid}.auth-panel small{color:var(--ink);font-size:.8rem;font-weight:760}.auth-panel input{min-height:44px;color:var(--ink);background:#fff;border:1px solid #bac8c1f5;border-radius:7px;outline:none;padding:10px 11px}.auth-panel input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #244f3f21}.student-auth-panel{background:#fff8f4}button:disabled{cursor:wait;opacity:.68}.mode-switch button.active,.tabbar button.active{background:var(--primary-dark)}.app-frame{grid-template-columns:260px minmax(0,1fr);gap:18px;width:min(1360px,100% - 40px);margin:0 auto;padding:18px 0 44px;display:grid}.app-rail{border-radius:var(--radius);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffffc2;border:1px solid #d9e0dceb;flex-direction:column;justify-content:space-between;min-height:calc(100vh - 104px);padding:14px;display:flex;position:sticky;top:78px;box-shadow:0 12px 36px #141a170d}.rail-section{gap:10px;display:grid}.rail-kicker,.section-head span,.summary-card span,.assignment-card span{color:var(--muted);letter-spacing:0;text-transform:uppercase;font-size:.74rem;font-weight:820}.rail-nav{gap:6px;display:grid}.rail-nav button{min-height:62px;color:var(--ink);cursor:pointer;text-align:left;background:0 0;border:1px solid #0000;border-radius:7px;gap:2px;padding:11px 12px;display:grid}.rail-nav button span{font-weight:820}.rail-nav button small{color:var(--muted);font-size:.78rem}.rail-nav button.active{background:var(--primary-dark);color:#fff;border-color:#244f3f2e;box-shadow:0 12px 24px #17382c26}.rail-nav button.active small{color:#ffffffb3}.rail-status{background:var(--primary-soft);border:1px solid #244f3f24;border-radius:7px;gap:4px;padding:12px;display:grid}.rail-status span,.rail-status small{color:var(--muted);font-size:.78rem;font-weight:700}.rail-status strong{color:var(--primary-dark)}.workbench{min-width:0}.command-bar{border-radius:var(--radius);background:linear-gradient(135deg,#fffffff5,#e8f1ecd6),#fff;border:1px solid #d9e0dcf2;justify-content:space-between;align-items:end;gap:18px;min-height:118px;margin-bottom:16px;padding:20px;display:flex;box-shadow:0 18px 48px #141a1712}.command-bar h1,.studio-head h2,.lesson-head h2{color:var(--ink);margin:2px 0 4px;font-size:clamp(1.35rem,2vw,2rem);line-height:1.12}.command-bar p,.studio-head p,.lesson-head p{color:var(--muted);margin:0}.command-actions{flex-wrap:wrap;justify-content:flex-end;gap:9px;display:flex}.workbench-grid{grid-template-columns:300px minmax(0,1fr);align-items:start;gap:16px;display:grid}.program-browser,.lesson-detail,.studio-pane{border-radius:var(--radius);background:#ffffffe0;border:1px solid #d9e0dcf2;box-shadow:0 14px 38px #141a170f}.program-browser{max-height:calc(100vh - 102px);padding:14px;position:sticky;top:78px;overflow:auto}.tracker-input{max-height:none;position:static}.lesson-detail,.studio-pane{min-width:0;padding:18px}.studio-head,.lesson-head,.section-head{justify-content:space-between;align-items:center;gap:12px;display:flex}.studio-head,.lesson-head{border-bottom:1px solid var(--line);margin-bottom:14px;padding-bottom:14px}.section-head{margin-bottom:12px}.section-head strong{color:var(--ink);font-size:.86rem}.compact-overview{box-shadow:none;background:0 0;border:0;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:0 0 16px;padding:0}.summary-card{min-height:auto;box-shadow:none;background:#fbfcfb;border-color:#d9e0dcf0}.summary-card strong{font-size:1.15rem}.filter-row{gap:6px;margin-bottom:12px}.filter-chip{background:#f8faf8;border-radius:7px;min-height:32px}.filter-chip.active,.filter-chip:hover{background:var(--primary-dark);color:#fff;border-color:#244f3f38}.program-list{gap:7px}.exercise-card{background:0 0;border-color:#0000;grid-template-columns:42px minmax(0,1fr);align-items:center;gap:10px;padding:10px;display:grid}.exercise-card:hover{background:#f8faf8;border-color:#244f3f2e;transform:none}.exercise-card.active{background:var(--primary-soft);border-color:#244f3f38}.exercise-index{border:1px solid var(--line);width:38px;height:38px;color:var(--primary-dark);background:#fff;border-radius:7px;place-items:center;font-size:.82rem;font-weight:850;display:grid}.exercise-card-title{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.exercise-card-meta{color:var(--muted);gap:10px;margin-top:4px;font-size:.78rem;font-weight:680}.premium-detail{grid-template-columns:1fr;align-items:start;gap:16px}.lesson-main{min-width:0}.lesson-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.metric{background:#fbfcfb;border-color:#d9e0dcf0;min-height:84px}.metric-value{color:var(--primary-dark);font-size:1.45rem}.lesson-brief{background:linear-gradient(135deg,#e8f1ecdb,#ffffffeb),#fff;border-color:#244f3f24;grid-template-columns:minmax(0,1fr) 290px}.preview-text,.reading-text,.result-report{background:#fbfcfb;border-color:#d9e0dcf2}.questions-head{margin-top:16px}.question-card{box-shadow:none;background:#fff;border-color:#d9e0dcf2}.question-card h4{line-height:1.35}.action-dock{border-radius:var(--radius);background:#fbfcfb;border:1px solid #d9e0dcf2;grid-template-columns:repeat(2,minmax(0,1fr));align-self:start;padding:12px;position:static}.side-actions{align-content:start}.action-dock .button,.action-dock .ghost-button{width:100%}@media (width>=1500px){.premium-detail{grid-template-columns:minmax(0,1fr) 280px}.action-dock{grid-template-columns:1fr;position:sticky;top:78px}}.assignment-card{background:#fff8f4;border-color:#b7633b3d}.button,.ghost-button,.danger-button{border-radius:7px}.button{background:var(--primary-dark)}.button.secondary{background:var(--accent)}.ghost-button{background:#fff;border-color:#bac8c1e6}.studio-pane{padding:18px}.builder-layout{grid-template-columns:minmax(0,1fr) 300px}.builder-inspector{top:78px}.field label{font-size:.8rem}.field input,.field select,.field textarea{background:#fff;border-color:#bac8c1f5}.field textarea{min-height:128px}.tracker-summary{grid-template-columns:repeat(4,minmax(0,1fr))}.students-workbench{grid-template-columns:320px minmax(0,1fr)}.students-summary{margin-bottom:14px}.field-grid.single{grid-template-columns:1fr}.student-code{background:var(--primary-soft);min-height:30px;color:var(--primary-dark);letter-spacing:.02em;border:1px solid #244f3f29;border-radius:7px;align-items:center;padding:4px 8px;font-weight:820;display:inline-flex}.small-action{min-height:32px;padding:0 10px;font-size:.8rem}.table-wrap{border-color:#d9e0dcf2}th{background:#f3f5f2}.student-app-shell{background:linear-gradient(180deg, #141a170f, #f3f5f200 260px), var(--bg)}.student-shell{width:min(980px,100% - 40px);padding-top:28px}.focus-card{background:#ffffffe6;border-color:#d9e0dcf2;box-shadow:0 24px 60px #141a1714}.focus-head{background:linear-gradient(135deg,#fffffffa,#e8f1ece0),#fff;align-items:stretch;padding:20px}.timer-box{background:#fff;border-color:#244f3f29;min-width:118px}.timer-value{color:var(--primary-dark)}.progress-strip{gap:6px}.step-chip{background:#f8faf8;border-color:#d9e0dcf2}.step-chip.active{background:var(--primary-dark);border-color:var(--primary-dark)}.reading-stage{max-width:820px;margin:0 auto}.reading-text{font-size:clamp(1.04rem,1.25vw,1.18rem)}.profile-badge{min-width:112px}.profile-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:16px;display:grid}.profile-history{gap:10px;display:grid}@media (width<=1100px){.app-frame{grid-template-columns:1fr}.app-rail{min-height:auto;position:static}.rail-nav{grid-template-columns:repeat(3,minmax(0,1fr))}.rail-status{display:none}.workbench-grid,.premium-detail,.lesson-brief,.builder-layout,.students-workbench{grid-template-columns:1fr}.program-browser,.action-dock,.builder-inspector{max-height:none;position:static}}@media (width<=760px){.topbar-inner,.app-frame,.student-shell{width:min(100% - 22px,1360px)}.topbar-inner,.command-bar,.studio-head,.lesson-head{flex-direction:column;align-items:stretch}.topbar-meta{order:3}.account-chip{width:100%;max-width:none}.rail-nav,.lesson-metrics,.compact-overview,.tracker-summary,.progress-strip,.profile-grid{grid-template-columns:1fr}.command-actions,.command-actions .button,.command-actions .ghost-button,.auth-grid{width:100%}.auth-grid{grid-template-columns:1fr}.exercise-card-title{white-space:normal}.lesson-detail,.studio-pane,.student-body{padding:14px}}