@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Fraunces:opsz,wght@9..144,600;9..144,700&display=swap');

:root{--ink:#17352f;--muted:#6d7f79;--paper:#f7f4ed;--card:#fffdf8;--green:#1c5b49;--green2:#2f8065;--mint:#dcebe2;--peach:#f3d4bc;--yellow:#f2df91;--red:#a74e42;--line:#dedfd7;--shadow:0 12px 38px rgba(26,53,45,.09);--radius:22px}
*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans',system-ui,sans-serif;font-size:16px}.skip{position:fixed;left:8px;top:-60px;background:#fff;padding:10px;z-index:99}.skip:focus{top:8px}.shell{min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:250px;padding:28px 18px;background:#143f35;color:white;display:flex;flex-direction:column;z-index:10}.brand{display:flex;align-items:center;gap:12px;color:white;text-decoration:none;padding:0 8px 28px}.brand-mark{width:44px;height:44px;border-radius:15px;background:var(--peach);color:#143f35;display:grid;place-items:center;font:700 25px 'Fraunces',serif;transform:rotate(-3deg)}.brand strong{display:block;font:700 23px 'Fraunces',serif}.brand small{display:block;color:#b9d0c8;font-size:11px;letter-spacing:.08em;text-transform:uppercase;margin-top:2px}.sidebar nav{display:grid;gap:6px}.nav-link{border:0;background:transparent;color:#bed0ca;text-align:left;padding:13px 14px;border-radius:14px;font:600 14px inherit;display:flex;align-items:center;gap:12px;cursor:pointer}.nav-link:hover,.nav-link.active{background:rgba(255,255,255,.1);color:white}.nav-icon{font-size:18px;width:22px;text-align:center}.sidebar-foot{margin-top:auto}.streak-chip{display:grid;grid-template-columns:34px 1fr;align-items:center;padding:14px;background:rgba(0,0,0,.12);border-radius:16px;margin-bottom:10px}.streak-chip span{grid-row:1/3;font-size:24px}.streak-chip strong{font-size:20px}.streak-chip small{color:#b9d0c8}main{margin-left:250px;min-height:100vh;padding:38px 4.5vw 70px;max-width:1450px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--green2);margin:0 0 5px}.topbar h1{font:700 clamp(30px,4vw,46px) 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.eyebrow{color:#a9cfbf}.ring{--p:0;width:148px;aspect-ratio:1;border-radius:50%;display:grid;place-items:center;margin:auto;background:conic-gradient(var(--peach) calc(var(--p)*1%),rgba(255,255,255,.13) 0);position:relative}.ring:before{content:'';position:absolute;inset:11px;background:var(--green);border-radius:50%}.ring span{position:relative;text-align:center}.ring b{display:block;font:700 33px 'Fraunces',serif}.ring small{color:#c6d8d2}.button{border:0;border-radius:13px;padding:12px 17px;font:700 14px inherit;cursor:pointer;transition:.18s transform,.18s opacity}.button:hover{transform:translateY(-1px)}.button.primary{background:var(--peach);color:#2d352f}.button.green{background:var(--green);color:white}.button.subtle{background:#e7ece8;color:var(--ink)}.button.outline{background:transparent;border:1px solid currentColor;color:inherit}.button.danger{background:#f3dfdc;color:#7a3028}.button.full{width:100%}.hero .button{margin-top:8px}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:18px}.card{background:var(--card);border:1px solid rgba(23,53,47,.08);border-radius:var(--radius);padding:24px;box-shadow:0 4px 18px rgba(22,45,38,.04)}.span-4{grid-column:span 4}.span-5{grid-column:span 5}.span-6{grid-column:span 6}.span-7{grid-column:span 7}.span-8{grid-column:span 8}.span-12{grid-column:1/-1}.card h2,.card h3{font-family:'Fraunces',serif;margin:0 0 8px}.card p{line-height:1.55}.muted{color:var(--muted)}.section-head{display:flex;justify-content:space-between;align-items:end;margin:34px 2px 12px}.section-head h2{font:700 27px 'Fraunces',serif;margin:0}.section-head p{margin:4px 0 0;color:var(--muted)}.lesson-row{display:flex;align-items:center;gap:16px;padding:17px 0;border-bottom:1px solid var(--line)}.lesson-row:last-child{border:0}.lesson-num{width:45px;height:45px;border-radius:14px;background:var(--mint);display:grid;place-items:center;font-weight:700}.lesson-row.done .lesson-num{background:var(--green);color:white}.lesson-copy{flex:1}.lesson-copy strong{display:block}.lesson-copy small{color:var(--muted)}.tag{display:inline-block;font-size:11px;font-weight:700;padding:5px 9px;border-radius:99px;background:var(--mint);color:var(--green);margin:3px 3px 0 0}.metric{font:700 34px 'Fraunces',serif}.metric small{font:500 14px 'DM Sans';color:var(--muted)}.bar{height:8px;background:#e8e8e0;border-radius:99px;overflow:hidden}.bar i{display:block;height:100%;background:var(--green2);border-radius:inherit}.activity{display:flex;gap:6px;align-items:end;height:65px;margin-top:16px}.activity i{flex:1;background:var(--mint);border-radius:6px 6px 2px 2px;min-height:7px}.activity i.on{background:var(--green2)}.flash-wrap{max-width:730px;margin:15px auto}.flashcard{min-height:350px;background:var(--card);border-radius:28px;box-shadow:var(--shadow);display:grid;place-items:center;text-align:center;padding:36px;position:relative;border:1px solid #e1dfd5}.flashcard .word{font:700 clamp(38px,7vw,68px) 'Fraunces',serif}.flashcard .translation{font-size:22px;margin-top:12px}.flashcard .hint{color:var(--muted);margin-top:14px}.flash-actions{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}.rating{padding:12px 5px;border:0;border-radius:12px;font-weight:700;cursor:pointer}.rating:nth-child(1){background:#f2d7d3}.rating:nth-child(2){background:#f1e4bd}.rating:nth-child(3){background:#dcebdd}.rating:nth-child(4){background:#c8e1d6}.center{text-align:center}.prompt{font:700 clamp(30px,5vw,48px) 'Fraunces',serif;margin:25px 0}.input{width:100%;padding:14px 16px;border:1px solid var(--line);border-radius:13px;background:white;font:inherit;color:var(--ink)}textarea.input{min-height:180px;resize:vertical}.input:focus{outline:3px solid rgba(47,128,101,.15);border-color:var(--green2)}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.stack{display:grid;gap:12px}.segmented{display:flex;gap:5px;padding:5px;background:#e9eae4;border-radius:14px;width:max-content;max-width:100%;overflow:auto}.segmented button{white-space:nowrap;border:0;background:transparent;padding:9px 14px;border-radius:10px;font-weight:700;color:var(--muted);cursor:pointer}.segmented button.active{background:white;color:var(--ink);box-shadow:0 2px 8px rgba(0,0,0,.07)}.result{padding:14px;border-radius:13px;margin-top:14px}.result.good{background:#dfefe5;color:#205d47}.result.bad{background:#f3dfdc;color:#833c33}.choice{display:block;width:100%;text-align:left;padding:14px;margin:9px 0;border:1px solid var(--line);background:white;border-radius:13px;font:inherit;cursor:pointer}.choice:hover{border-color:var(--green2)}.choice.good{background:#dff0e6;border-color:#5d9b7e}.choice.bad{background:#f4dfdc;border-color:#b86b61}.chat{height:420px;overflow:auto;padding:12px;background:#f0efe8;border-radius:18px;display:flex;flex-direction:column;gap:10px}.bubble{max-width:78%;padding:12px 15px;border-radius:16px;line-height:1.5}.bubble.tutor{background:white;align-self:flex-start;border-bottom-left-radius:4px}.bubble.user{background:var(--green);color:white;align-self:flex-end;border-bottom-right-radius:4px}.mic{width:72px;height:72px;border-radius:50%;border:0;background:var(--peach);font-size:26px;cursor:pointer}.mic.listening{animation:pulse 1s infinite}@keyframes pulse{50%{box-shadow:0 0 0 14px rgba(243,212,188,.35)}}.empty{padding:45px;text-align:center;color:var(--muted)}.source-box{border:2px dashed #c9cdc3;border-radius:18px;padding:28px;text-align:center}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.dialog-close{position:absolute;right:15px;top:12px;border:0;background:transparent;font-size:26px;cursor:pointer}dialog{border:0;border-radius:24px;padding:28px;max-width:620px;width:calc(100% - 30px);color:var(--ink);box-shadow:0 20px 70px rgba(0,0,0,.25)}dialog::backdrop{background:rgba(13,35,29,.55)}#toast{position:fixed;z-index:100;right:24px;bottom:24px;background:#17352f;color:white;border-radius:13px;padding:12px 17px;opacity:0;transform:translateY(12px);transition:.2s;pointer-events:none}#toast.show{opacity:1;transform:none}.mobile-nav{display:none}.kbd{font-family:ui-monospace,monospace;background:#ecece5;padding:2px 6px;border-radius:5px;font-size:.9em}
@media(max-width:900px){.sidebar{display:none}main{margin:0;padding:24px 22px 95px}.mobile-nav{display:flex;position:fixed;z-index:20;bottom:0;left:0;right:0;height:72px;background:rgba(255,253,248,.95);backdrop-filter:blur(12px);border-top:1px solid var(--line);justify-content:space-around;padding-bottom:env(safe-area-inset-bottom)}.mobile-nav .nav-link{padding:9px 10px;display:grid;place-items:center;gap:1px;font-size:10px;color:var(--muted)}.mobile-nav .nav-icon{font-size:20px}.mobile-nav .nav-link.active{background:transparent;color:var(--green)}.hero-grid{grid-template-columns:1fr}.ring{display:none}.span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 6}}
@media(max-width:620px){main{padding:20px 15px 92px}.topbar{margin-bottom:20px}.topbar h1{font-size:31px}.hero{border-radius:22px;padding:25px}.hero h2{font-size:33px}.grid{gap:12px}.span-4,.span-5,.span-6,.span-7,.span-8{grid-column:1/-1}.card{padding:19px;border-radius:18px}.flashcard{min-height:310px;padding:24px}.flash-actions{grid-template-columns:1fr 1fr}.form-grid{grid-template-columns:1fr}.section-head{align-items:start}.section-head .button{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}