:root{--navy:#243248;--muted:#5b6a7f;--blue:#3852c8;--blue2:#eef0ff;--purple:#eee9fa;--pink:#f9e4ef;--green:#e7f3ec;--border:#d7deea;--bg:#f3f3ef;--card:#fff;--shadow:0 12px 34px rgba(24,36,69,.045)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--navy);background:var(--bg);font:16px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.55;cursor:default}a{color:var(--blue)}.top{height:75px;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 max(32px,calc((100vw - 1510px)/2));border-bottom:1px solid var(--border)}.brand{text-decoration:none;color:var(--blue);font-weight:900;font-size:22px;letter-spacing:-.04em}.brand span{color:var(--navy);font-weight:700}.language{font-size:13px;letter-spacing:.15em;color:var(--muted);font-weight:800}.shell{max-width:1510px;margin:34px auto;display:grid;grid-template-columns:300px minmax(0,1fr) 280px;gap:23px;padding:0 26px;align-items:start}.path,.lesson,.assist{border:1px solid var(--border);border-radius:26px;background:var(--card);box-shadow:var(--shadow)}.path{padding:28px 22px;position:sticky;top:20px}.eyebrow{font-size:11px;font-weight:900;letter-spacing:.13em;color:#69788e}.eyebrow span{color:#b9bfd0}.path h2{font-size:23px;margin:13px 0 0;letter-spacing:-.03em}.tl{color:var(--muted);font-size:.91em;margin-top:1px}.path>.tl{margin:0 0 21px}.path-list{display:flex;flex-direction:column;gap:4px;max-height:58vh;overflow:auto;padding-right:2px}.path-item{display:flex;text-align:left;gap:10px;align-items:center;width:100%;padding:9px 7px;border:0;border-radius:12px;background:transparent;color:var(--navy)}.path-item:hover,.path-item.active{background:var(--blue2)}.path-number{flex:0 0 27px;height:27px;border-radius:50%;display:grid;place-items:center;background:#e8ebf2;color:#596579;font-weight:800;font-size:12px}.path-item.active .path-number{background:var(--blue);color:white}.path-item.done .path-number{background:var(--green);color:#237252}.path-name{font-size:13px;font-weight:700;line-height:1.2}.path-name small{display:block;font-size:11px;color:var(--muted);font-weight:500;margin-top:3px}.path-foot{border-top:1px solid var(--border);margin-top:23px;padding-top:20px;font-size:13px}.path-foot strong{display:block}.path-foot .tl{display:block}.meter{height:8px;background:#e4e8ef;border-radius:20px;overflow:hidden;margin:14px 0}.meter span{display:block;height:100%;background:var(--blue);width:0;transition:width .3s}.path-foot p{font-size:12px;color:var(--muted);margin-bottom:0}.lesson{min-height:740px;padding:37px 42px 31px}.lesson .eyebrow{margin-bottom:12px}.lesson h1{font-size:clamp(30px,3vw,43px);line-height:1.14;letter-spacing:-.047em;margin:0}.subtitle{font-size:20px;margin:5px 0 24px;color:var(--muted)}.intro{font-size:18px;line-height:1.47;margin:19px 0}.intro .tl{display:block;font-size:15px}.aims{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:25px 0}.aim{background:var(--purple);padding:13px 15px;border-radius:13px}.aim b{display:block;color:#694ca2;text-transform:uppercase;letter-spacing:.06em;font-size:10px}.aim strong{display:block;font-size:14px;line-height:1.3;margin:5px 0 2px}.aim .tl{display:block;font-size:12px;line-height:1.3}.content-card{background:#f8f9fc;border:1px solid #e9ecf4;border-radius:17px;padding:20px 22px;margin:20px 0}.content-card p{margin:0 0 13px}.content-card p:last-child{margin-bottom:0}.content-card .tl{display:block;font-size:14px}.focus{border-left:4px solid var(--blue);padding-left:17px;margin:22px 0;font-weight:700}.focus .tl{display:block;font-weight:400}.options{display:grid;gap:9px;margin:20px 0}.option{display:flex;align-items:center;text-align:left;gap:13px;width:100%;border:1px solid var(--border);background:#fff;border-radius:13px;padding:12px 14px;color:var(--navy)}.option:hover,.option.selected{border-color:var(--blue);background:#f6f7ff}.option-key{width:27px;height:27px;flex:none;border-radius:50%;display:grid;place-items:center;border:1px solid #b9c4d7;color:var(--muted);font-weight:800;font-size:13px}.option strong{display:block;font-size:15px}.option .tl{display:block;font-size:12px}.action-row{display:flex;gap:10px;flex-wrap:wrap;margin:23px 0}.primary{border:0;border-radius:13px;background:var(--blue);color:white;font-weight:800;padding:13px 22px;box-shadow:0 4px 0 #273eaa}.primary:hover{background:#3048b7}.primary small,.pink-button span{display:block;font-size:12px;font-weight:500;opacity:.85}.secondary{background:#fff;border:1px solid var(--border);border-radius:13px;color:var(--navy);padding:12px 18px;font-weight:700}.feedback{background:var(--green);color:#1e6046;border-radius:14px;padding:16px 18px;margin:16px 0;white-space:pre-wrap}.feedback.try{background:#fff1df;color:#78541b}.feedback.pending{background:#eef0ff;color:#334a9a}.feedback small{display:block;margin-top:8px;font-size:11px;opacity:.8}.entry{margin:22px 0}.entry label{display:block;font-weight:800;margin-bottom:7px}.entry textarea,.assist textarea{width:100%;resize:vertical;border:1px solid #bbc7d7;border-radius:13px;padding:12px 14px;min-height:112px;color:var(--navy);background:#fff}.entry textarea:focus,.assist textarea:focus{outline:3px solid #d9ddff;border-color:var(--blue)}.entry-note{font-size:12px;color:var(--muted);margin:5px 0}.note-template{white-space:pre-wrap;background:#f2f5fa;border-radius:12px;padding:15px;font-size:13px}.more{border:1px solid var(--border);border-radius:12px;margin:8px 0;overflow:hidden}.more summary{cursor:pointer;padding:11px 14px;font-weight:750;font-size:14px;background:#fafbff}.more summary span{display:block;color:var(--muted);font-weight:400;font-size:12px}.more-body{padding:14px;white-space:pre-line;font-size:14px}.more-body .tl{display:block}.nav-actions{border-top:1px solid var(--border);padding-top:24px;margin-top:34px;display:flex;align-items:center;justify-content:space-between;gap:12px}.nav-actions .primary{text-align:left}.assist{padding:22px;position:sticky;top:20px}.help-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}.help-icon{height:34px;width:34px;background:#e2669e;color:#fff;border-radius:10px;display:grid;place-items:center;font-weight:900}.assist h2{font-size:19px;margin:0}.assist .tl{margin:0}.assist>p{font-size:14px;margin:10px 0 2px}.assist>label{display:block;font-size:13px;font-weight:800;margin:19px 0 7px}.assist textarea{min-height:125px;font-size:14px}.pink-button{border:0;border-radius:11px;background:var(--pink);color:#8f335b;font-weight:800;padding:11px 14px;margin-top:8px;width:100%}.pink-button:hover{background:#f4d7e7}.assist-status{font-size:12px;color:#41634c;margin-top:10px}.privacy{border-top:1px solid var(--border);padding-top:17px;margin-top:24px;font-size:12px}.privacy p{margin:8px 0 0}.reply{background:#f5f6fb;border-radius:11px;padding:11px;margin-top:14px;font-size:12px;overflow-wrap:anywhere}.reply small{display:block;color:var(--muted)}.review-wrap{max-width:900px;margin:40px auto;padding:0 25px}.review-wrap h1{font-size:40px;margin:8px 0}.review-item,.review-note{background:#fff;border:1px solid var(--border);border-radius:15px;padding:19px;margin:14px 0}.review-item h3{font-size:13px;overflow-wrap:anywhere}.review-item p{white-space:pre-wrap}.review-item blockquote{margin:12px 0 0;background:var(--green);padding:13px;border-radius:9px;white-space:pre-wrap}.review-item small{display:block;margin-top:6px}.review-meta{font-size:12px;color:var(--muted)}.status{font-weight:800;text-transform:uppercase}.status.pending{color:#9b5629}.status.replied{color:#207155}.review-note code{display:block;background:#f1f3f7;border-radius:7px;padding:8px;overflow-wrap:anywhere;margin:8px 0}@media(max-width:1120px){.shell{grid-template-columns:220px minmax(0,1fr)}.assist{grid-column:2;position:static}.path{grid-row:1 / span 2}.lesson{min-height:unset}}@media(max-width:700px){.top{height:62px;padding:0 18px}.brand{font-size:19px}.shell{display:flex;flex-direction:column;padding:0 12px;margin:14px auto;gap:12px}.path,.lesson,.assist{width:100%;border-radius:18px;position:static}.path{padding:18px}.path-list{max-height:172px}.path-foot{margin-top:14px;padding-top:12px}.lesson{padding:25px 20px}.lesson h1{font-size:31px}.subtitle{font-size:17px}.aims{grid-template-columns:1fr 1fr}.aim{padding:10px}.aim strong{font-size:12px}.assist{padding:19px}.nav-actions{align-items:stretch}.nav-actions button{flex:1}}
.test-badge{background:#fff1d2;color:#7f5a16;border:1px solid #e9ca80;border-radius:50px;padding:5px 10px;font-size:11px;font-weight:900;letter-spacing:.08em}.review-item textarea,.review-note textarea{width:100%;display:block;margin:9px 0;border:1px solid var(--border);border-radius:10px;padding:10px;color:var(--navy)}
.review-note input{display:block;width:100%;padding:12px 14px;margin:6px 0 18px;border:1px solid #bbc7d7;border-radius:10px;font:inherit;color:var(--navy)}.review-note label{display:block;font-weight:700}.review-note input:focus-visible{outline:3px solid #d9ddff}
@media(max-width:700px){.shell .lesson{order:0}.shell .assist{order:1}.shell .path{order:2}.top .language{margin-left:auto;margin-right:8px;font-size:11px}.top .test-badge{font-size:8px;padding:4px 6px}}

/* Foundation 1: one clear lesson, with path and help available on demand. */
.top{position:sticky;top:0;z-index:20}.top-actions{display:flex;align-items:center;gap:18px}.help-trigger{border:1px solid #e9a8c6;background:var(--pink);color:#853257;border-radius:13px;padding:8px 14px;font-weight:800;line-height:1.15}.help-trigger span{display:block;font-size:11px;font-weight:500}.help-trigger:hover,.help-trigger[aria-expanded="true"]{background:#f3d0e3}.help-trigger:focus-visible,.help-close:focus-visible,.path-details summary:focus-visible,.more summary:focus-visible,.primary:focus-visible,.secondary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.shell{max-width:1280px;grid-template-columns:248px minmax(0,1fr);gap:24px}.path{padding:24px 21px}.path>.tl{margin:0 0 14px}.path-now,.path-next{padding:12px 0;border-top:1px solid var(--border)}.path-now strong,.path-next strong,.path-now .tl,.path-next .tl{display:block}.path-now strong,.path-next strong{font-size:14px;margin-top:3px}.path-next{padding-bottom:6px}.path-foot{margin-top:8px;padding-top:13px}.path-foot p{line-height:1.35}.path-details{border-top:1px solid var(--border);margin-top:17px;padding-top:10px}.path-details summary{cursor:pointer;color:var(--blue);font-size:14px;font-weight:800}.path-details summary span{display:block;color:var(--muted);font-size:12px;font-weight:400}.path-list{max-height:48vh;margin-top:10px}.lesson{min-height:0;padding:30px 38px 32px}.lesson .eyebrow{margin-bottom:8px}.subtitle{margin:3px 0 14px}.aims{margin:18px 0 16px;gap:9px}.aim{padding:11px 14px}.aim b{font-size:10px}.aim strong{font-size:13px;margin:4px 0 2px}.aim .tl{font-size:12px}.nav-actions{margin-top:19px;padding-top:16px}.lesson .entry-note{margin-top:10px}.welcome-details{margin-top:14px}.welcome-details .more-body p{margin:0 0 10px}.welcome-details .more-body p:last-child{margin-bottom:0}
.assist{position:fixed;top:88px;right:max(18px,calc((100vw - 1280px)/2));width:min(380px,calc(100vw - 24px));max-height:calc(100vh - 106px);overflow:auto;z-index:30;box-shadow:0 18px 65px rgba(24,36,69,.22)}.assist[hidden]{display:none}.help-close{margin-left:auto;align-self:flex-start;background:#fff;border:1px solid var(--border);border-radius:9px;width:31px;height:31px;color:var(--navy);font-size:22px;line-height:1}.help-head{margin-bottom:10px}
@media(max-width:1120px){.shell{grid-template-columns:210px minmax(0,1fr)}.path{grid-row:auto}.assist{grid-column:auto;position:fixed}}
@media(max-width:700px){.top{height:62px}.top-actions{gap:7px}.top .language{margin:0;font-size:11px}.help-trigger{font-size:12px;padding:6px 9px}.help-trigger span{font-size:10px}.shell{display:flex;flex-direction:column;padding:0 12px;margin:14px auto;gap:12px}.shell .lesson{order:0}.shell .path{order:1}.shell .assist{order:2}.lesson{padding:22px 19px}.subtitle{margin-bottom:11px}.aims{grid-template-columns:1fr 1fr;gap:7px;margin:14px 0}.aim{padding:9px}.aim strong{font-size:12px}.aim .tl{font-size:11px}.path{padding:18px}.assist{position:fixed;top:70px;right:12px;max-height:calc(100vh - 82px);padding:19px}.nav-actions{align-items:stretch}}

.logout{background:white;border:1px solid var(--border);border-radius:11px;color:var(--navy);font-weight:700;padding:6px 10px;font-size:12px}.logout span{display:block;color:var(--muted);font-size:10px;font-weight:400}.logout[hidden]{display:none}.review-switch{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0 18px}.review-switch a{border:1px solid var(--border);border-radius:10px;background:white;padding:8px 11px;text-decoration:none;font-size:14px;font-weight:700}.review-switch a[aria-current="page"]{background:var(--blue);color:white}.pair-actions{display:flex;gap:10px;flex-wrap:wrap}.pair-output{background:var(--purple);border-radius:10px;padding:12px;overflow-wrap:anywhere}.pair-output:empty{display:none}
.pair-wrap{max-width:530px;margin:55px auto;padding:32px;background:white;border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow)}.pair-wrap h1{font-size:clamp(28px,5vw,40px);margin:9px 0 0;letter-spacing:-.04em}.pair-wrap>.tl{margin:0 0 24px}.pair-wrap form{margin:24px 0}.pair-wrap label{display:block;font-weight:800;margin-bottom:7px}.pair-wrap input{display:block;width:100%;padding:12px 14px;border:1px solid #bbc7d7;border-radius:12px;margin-bottom:15px;font:inherit}.pair-wrap input:focus-visible{outline:3px solid #d9ddff}.pair-wrap .primary{width:100%;text-align:left}.pair-wrap .privacy{margin-top:24px}.pair-wrap #pair-status{color:#8f335b;min-height:1.5em}
@media(max-width:700px){.pair-wrap{margin:14px 12px;padding:23px 19px}.top .logout{padding:4px 6px}.top .logout span{font-size:9px}}

/* Keep staging context legible on narrow phones. */
@media(max-width:700px){
  .top{height:auto;min-height:62px;display:grid;grid-template-columns:auto minmax(0,1fr);gap:6px;padding:8px 12px}
  .top .brand{font-size:18px;white-space:nowrap}
  .top-actions{justify-content:flex-end;min-width:0;gap:5px}
  .top .language{display:none}
  .top .test-badge{grid-column:1/-1;justify-self:start;font-size:9px;padding:3px 8px}
}

/* Saved learning content is visibly separate from an editable draft. */
.saved-heading{font-size:15px;margin:26px 0 8px;color:var(--navy)}
.feedback p{margin:8px 0 12px;white-space:pre-wrap;overflow-wrap:anywhere;font-weight:500;color:var(--navy)}
.option.saved{border-color:#8fc3a6;background:#f5fbf7}
.saved-label{display:block;margin-top:5px;color:#216c4b;font-size:11px;font-weight:800}
.save-status{margin:14px 0;min-height:1.3em;font-size:13px;font-weight:700}
.save-status:empty{min-height:0;margin:0}
.save-status.success{color:#216c4b}
.save-status.pending{color:#775323}
.save-status.error{color:#a73d48}
.review-note[hidden]{display:none}