:root{--bg:#f5f5ef;--paper:#fff;--ink:#20312e;--muted:#67716d;--line:#dfe4d9;--green:#163b36;--green2:#285f51;--lime:#e4edac;--soft:#eef2e7;--danger:#983d37;--radius:20px;--shadow:0 14px 40px #1c342809;font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,textarea,select{touch-action:manipulation}button{background:var(--green);border:1px solid transparent;border-radius:12px;color:white;padding:11px 18px;font-weight:650;cursor:pointer;line-height:1.4;min-height:46px}button:hover{background:var(--green2)}button:disabled{opacity:.48;cursor:not-allowed}button.secondary{background:white;color:var(--green);border-color:var(--line)}button.secondary:hover{background:var(--soft)}button.ghost{background:transparent;color:var(--green);border-color:transparent}button.danger{background:var(--danger)}button.small{padding:6px 11px;min-height:40px;font-size:.85rem}a{color:var(--green2);text-underline-offset:3px}a.button{display:inline-block;background:var(--green);color:white;text-decoration:none;border-radius:12px;padding:11px 18px;font-weight:650}a:hover{text-decoration:underline}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(1.9rem,4vw,3rem);line-height:1.14;letter-spacing:-1.3px;margin-bottom:18px;font-weight:650}h2{font-size:1.3rem;letter-spacing:-.3px;line-height:1.35;margin-bottom:14px}h3{font-size:1.05rem;line-height:1.4;margin-bottom:8px}p{margin-bottom:16px}small,.small-text{font-size:.84rem}.muted{color:var(--muted)}.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:.68rem;font-weight:750;color:var(--green2);margin-bottom:13px}.pill{display:inline-block;font-size:.72rem;font-weight:650;padding:5px 10px;border-radius:99px;background:var(--soft);color:var(--green);white-space:nowrap}.pill.dark{background:#ffffff20;color:white}.pill.warn{background:#fff1d9;color:#805a17}.pill.bad{background:#fae8e5;color:var(--danger)}.actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.stack{display:grid;gap:18px}.row{display:flex;gap:16px;align-items:center;justify-content:space-between}.wrap{flex-wrap:wrap}.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow);min-width:0}.card.flush{padding:0;overflow:hidden}.card.soft{background:var(--soft);box-shadow:none}.card.dark{background:var(--green);color:white;border-color:var(--green)}.card.dark .muted{color:#d3dfd5}.divider{border:0;border-top:1px solid var(--line);margin:24px 0}.empty{padding:46px 26px;text-align:center}.empty p{max-width:550px;margin:0 auto 20px}.shell{display:grid;grid-template-columns:258px minmax(0,1fr);min-height:100vh}.sidebar{padding:34px 24px 20px;background:#edf0e7;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:32px;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:12px;font-size:1.08rem;line-height:1.15;letter-spacing:-.3px;font-weight:720;text-decoration:none}.monogram{width:44px;height:44px;background:var(--green);color:var(--lime);display:grid;place-items:center;border-radius:14px;font-size:1.1rem;font-weight:750;flex-shrink:0}.brand span:last-child{max-width:140px}.brand small{font-size:.71rem;color:var(--muted);letter-spacing:1.5px;font-weight:550}.sidebar nav{display:grid;gap:7px}.nav-button{display:flex;gap:12px;align-items:center;text-align:left;background:transparent;color:var(--muted);border-radius:11px;padding:12px 15px;font-weight:550}.nav-button:hover{background:#dfe6d8;color:var(--green)}.nav-button.active{background:var(--green);color:white}.nav-icon{width:22px;font-size:1.1rem;text-align:center}.sidebar-footer{margin-top:auto;border-top:1px solid var(--line);padding-top:20px;overflow-wrap:anywhere}.sidebar-footer p{margin:0 0 8px;font-size:.77rem}.main-area{padding:28px 42px 45px;max-width:1440px;width:100%;margin:auto}.topbar{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:30px}.breadcrumbs{font-size:.8rem;color:var(--muted)}.selectors{display:flex;gap:12px;align-items:end}.selectors label{font-size:.68rem;text-transform:uppercase;letter-spacing:1px;font-weight:700}.selectors select{max-width:230px;min-height:42px;padding:7px 30px 7px 12px;margin-top:3px;font-size:.88rem;text-transform:none;letter-spacing:normal}.hero{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(210px,.85fr);gap:25px;margin-bottom:26px}.hero-main{background:var(--green);border-radius:var(--radius);padding:32px;color:white;position:relative;overflow:hidden;min-height:230px}.hero-main:after{content:"";position:absolute;width:270px;height:270px;right:-140px;top:-120px;border:45px solid #dbe7a415;border-radius:50%;pointer-events:none}.hero-main h1{max-width:650px}.hero-main p{color:#d6e4db;max-width:550px;font-size:.95rem}.hero-main .eyebrow{color:var(--lime)}.hero-main button{background:var(--lime);color:var(--green)}.hero-main button.secondary{background:transparent;color:white;border-color:#dfe4d945}.stats-card{border-radius:var(--radius);background:#e6ebd7;padding:28px;display:flex;flex-direction:column;justify-content:center}.stats{display:flex;gap:22px;flex-wrap:wrap}.stat strong{display:block;font-size:2.1rem;line-height:1.2;letter-spacing:-1px;font-weight:650}.stat span{font-size:.72rem;color:var(--muted);display:block;max-width:90px;margin-top:7px}.book-layout{display:grid;grid-template-columns:minmax(220px,.65fr) minmax(0,1.7fr);gap:24px;align-items:start}.course-list{display:grid;gap:9px}.course-item{width:100%;border-radius:13px;padding:14px;text-align:left;display:flex;gap:12px;background:transparent;color:var(--ink);border:1px solid var(--line);font-weight:500;align-items:flex-start}.course-item:hover{background:var(--soft)}.course-item.active{border-color:#76a589;background:#eff4e8}.course-number{width:29px;height:29px;flex-shrink:0;display:grid;place-items:center;font-size:.76rem;border:1px solid #c9d3c6;border-radius:50%;margin-top:1px}.course-item.done .course-number{background:var(--green);color:white;border-color:var(--green)}.course-item strong{display:block;font-size:.88rem;line-height:1.4}.course-item small{color:var(--muted);font-size:.71rem;font-weight:400;display:block;margin-top:5px}.lesson-header{padding:25px 27px 20px;border-bottom:1px solid var(--line)}.lesson-body{padding:27px}.lesson-header h2{font-size:1.5rem;margin:12px 0 8px}.lesson-header .can-do{font-size:.9rem;color:var(--muted);margin:0}.step-line{display:flex;gap:6px;margin:18px 0}.step-line span{height:5px;background:var(--line);border-radius:8px;flex:1}.step-line span.done{background:var(--green2)}.step-line span.current{background:#b8ca86}.prompt{font-size:1.22rem;line-height:1.7;padding:22px;background:var(--bg);border-radius:14px;white-space:pre-wrap;overflow-wrap:anywhere;margin:17px 0}.target-text{unicode-bidi:plaintext}.exercise-meta{display:flex;justify-content:space-between;align-items:center;gap:12px}.exercise-meta .pill{font-size:.66rem;letter-spacing:.6px}.choices{display:grid;gap:10px;margin:20px 0}.choice{border:1px solid var(--line);border-radius:12px;padding:13px 16px;display:flex;gap:12px;align-items:center;cursor:pointer;background:white}.choice:hover{background:var(--soft)}.choice input{width:18px;height:18px;accent-color:var(--green);min-height:0;margin:0}.choice:has(input:checked){background:var(--soft);border-color:var(--green2)}.hint,.feedback{padding:16px 18px;border-radius:12px;font-size:.9rem;margin-top:15px;white-space:pre-wrap;overflow-wrap:anywhere}.hint{background:#fff7e6;border:1px solid #ead8b6}.feedback{background:var(--soft);border:1px solid #cfddc5}.field{display:grid;gap:6px;margin-bottom:17px;font-size:.87rem;font-weight:600}input,select,textarea{width:100%;background:#fff;color:var(--ink);border:1px solid #cdd5ca;border-radius:10px;padding:11px 13px;min-height:46px}input::placeholder,textarea::placeholder{color:#8a938d;font-weight:400}textarea{resize:vertical;min-height:100px;line-height:1.6}input[type=checkbox]{width:18px;min-height:18px;accent-color:var(--green)}.check{display:flex;gap:10px;align-items:flex-start;font-size:.85rem;font-weight:400;margin-bottom:20px}.field small{font-weight:400;color:var(--muted)}.explanation{white-space:pre-wrap;font-size:.91rem;color:var(--muted)}details{border-top:1px solid var(--line);padding-top:15px;margin-top:20px}summary{cursor:pointer;font-size:.85rem;color:var(--green2);font-weight:650;min-height:35px}.vocab-item{padding:14px 0;border-bottom:1px solid var(--line)}.vocab-item:last-child{border-bottom:0}.vocab-item strong{font-size:1.05rem}.vocab-item p{font-size:.82rem;color:var(--muted);margin:4px 0}.evidence{padding:19px 0;border-bottom:1px solid var(--line)}.evidence:last-child{border-bottom:0}.evidence p{font-size:.88rem;margin:8px 0}.evidence blockquote{margin:10px 0;padding:10px 16px;border-left:3px solid #bccd98;background:var(--bg);font-size:.93rem;white-space:pre-wrap;overflow-wrap:anywhere}.skill-row{padding:17px 0;border-bottom:1px solid var(--line)}.skill-row:last-child{border:0}.skill-row p{font-size:.8rem;color:var(--muted);margin:6px 0 0}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:32px;background:radial-gradient(ellipse at top right,#dfe9d3 0,transparent 60%),var(--bg)}.auth-card{max-width:520px;width:100%;padding:38px;border-radius:24px;background:white;border:1px solid var(--line);box-shadow:0 24px 90px #2541320d}.auth-card .brand{margin-bottom:32px}.auth-card h1{font-size:2.2rem}.auth-card .muted{font-size:.85rem}.auth-card button[type=submit]{width:100%}.login-footer{margin:24px 0 0;font-size:.76rem!important}.save-state{font-size:.75rem;display:flex;align-items:center;gap:7px;color:var(--muted)}.save-dot{width:7px;height:7px;border-radius:50%;background:#548668}.notice-inline{background:#f4eedf;border:1px solid #dfd0b3;border-radius:12px;padding:16px;font-size:.86rem;margin:16px 0}#notice{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);width:min(620px,calc(100% - 32px));padding:16px 22px;background:var(--green);color:white;border-radius:14px;box-shadow:0 12px 40px #0002;z-index:50;font-size:.9rem}#notice.error{background:#773d36}#notice button{margin-left:14px;background:white;color:var(--green);padding:6px 10px;min-height:34px}dialog{border:1px solid var(--line);border-radius:23px;background:var(--paper);color:var(--ink);padding:30px;width:min(640px,calc(100% - 30px));max-height:90vh;overflow:auto;box-shadow:0 30px 100px #0002}dialog::backdrop{background:#13281f88;backdrop-filter:blur(3px)}dialog h2{font-size:1.5rem}dialog footer{display:flex;gap:12px;justify-content:flex-end;margin-top:25px}.code-box{font: .84rem/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;background:var(--soft);border-radius:10px;padding:13px;overflow-wrap:anywhere;white-space:pre-wrap}.profile-tile{padding:18px;border:1px solid var(--line);border-radius:14px;display:flex;align-items:center;gap:14px;margin-bottom:12px}.avatar{width:44px;height:44px;border-radius:50%;background:var(--soft);display:grid;place-items:center;font-weight:650;flex-shrink:0}.profile-tile .meta{flex:1}.profile-tile p{margin:0;font-size:.8rem;color:var(--muted)}.page-title{margin-bottom:28px}.page-title h1{font-size:2.1rem;margin-bottom:8px}.page-title p{color:var(--muted)}.link-list{display:grid;gap:12px}.danger-zone{border-color:#e7c9c4;margin-top:24px}.skip-link{position:absolute;left:-1000px;top:10px;z-index:200;background:white;padding:10px}.skip-link:focus{left:10px}:focus-visible{outline:3px solid #5e9080;outline-offset:4px}pre{white-space:pre-wrap;overflow-wrap:anywhere}.busy{cursor:progress}.public-page{max-width:820px;padding:40px 24px;margin:auto}.public-page h1{margin-top:45px}table{border-collapse:collapse;width:100%;font-size:.86rem}th,td{text-align:left;border-bottom:1px solid var(--line);padding:12px;vertical-align:top}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:1600px){.main-area{padding-top:36px}}@media(max-width:1200px){.sidebar{padding-left:17px;padding-right:17px}.shell{grid-template-columns:224px minmax(0,1fr)}.main-area{padding:24px}.hero{grid-template-columns:minmax(0,1fr)}.stats-card{padding:20px 26px}.stats-card .eyebrow{display:none}.stats{gap:38px}.stat{display:flex;align-items:center;gap:12px}.stat span{margin:0;max-width:110px}.book-layout{grid-template-columns:minmax(175px,.7fr) minmax(0,1.7fr)}}@media(max-width:900px){.shell{display:block}.sidebar{height:auto;position:static;padding:18px 24px;gap:16px;border-bottom:1px solid var(--line);border-right:0}.sidebar .brand span:last-child{max-width:none}.brand small{display:none}.sidebar nav{display:flex;gap:6px;overflow:auto}.nav-button{white-space:nowrap;padding:9px 13px;font-size:.83rem}.sidebar-footer{display:none}.topbar{flex-wrap:wrap}.breadcrumbs{display:none}.selectors{width:100%}.selectors label{flex:1}.selectors select{max-width:none}.grid2{grid-template-columns:1fr}.book-layout{grid-template-columns:1fr}.course-list{grid-template-columns:repeat(3,minmax(0,1fr))}.course-item{padding:11px;gap:8px}.course-item small{display:none}.course-number{width:24px;height:24px}.course-item strong{font-size:.8rem}.card{padding:22px}.card.flush{padding:0}.hero-main{padding:28px}.topbar>button{margin-left:auto}}@media(max-width:520px){.main-area{padding:19px 15px 35px}.sidebar{padding:15px}.nav-icon{display:none}.nav-button{padding:10px 12px;font-size:.78rem}.hero-main{padding:24px}.hero-main h1{font-size:2rem}.hero-main .actions button{font-size:.83rem}.stats{gap:21px;justify-content:space-between}.stat{display:block}.stat strong{font-size:1.75rem}.stat span{max-width:82px;font-size:.67rem;margin-top:4px}.book-layout{gap:18px}.lesson-body,.lesson-header{padding:21px}.prompt{padding:17px;font-size:1.06rem}.course-list{grid-template-columns:1fr}.course-item small{display:block}.course-item strong{font-size:.9rem}.actions button{flex:1}.auth-shell{padding:18px}.auth-card{padding:28px 24px}.selectors{gap:9px}.selectors select{font-size:.78rem;padding-left:9px}.profile-tile{flex-wrap:wrap}.row{gap:10px}.eyebrow{font-size:.63rem}.card{padding:20px}.exercise-meta{align-items:start}.save-state{font-size:.67rem}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}@media print{.sidebar,.topbar,.actions,button,#notice{display:none!important}.shell,.main-area,.book-layout{display:block}.card,.hero-main{break-inside:avoid;background:white!important;color:black!important;box-shadow:none}.main-area{padding:0}.hero-main p{color:black}.course-list{display:block}.auth-shell{background:white}.lesson-body{padding:15px}}

/* Compact mobile practice: current activity before the course map. */
fieldset.choices{border:0;padding:0;min-width:0}
@media(max-width:760px){.sidebar>.card{display:none}.sidebar nav{display:grid;grid-template-columns:1fr 1fr;overflow:visible}.nav-button{font-size:.78rem;justify-content:flex-start;white-space:normal}.book-layout>section{grid-row:1}.book-layout>aside{grid-row:2}.hero-main{min-height:0;padding:24px}.hero-main h1{font-size:1.9rem}.stats-card{padding:20px}.stats-card>.eyebrow{display:none}}