:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--ink:#2f302b;--muted:#706d63;--paper:#fcf7ed;--surface:#fffdf8;--line:#e8dcc8;--canyon:#df6d41;--buttercream:#f7d89a;--morning-sky:#8da6cc;--olive-grove:#aaa648;--purple:#c4512e;--purple-dark:#a84124;--purple-soft:#f9e2d8;--orange:#df6d41;--green:#77752f;--green-soft:#eeedcf;--red:#d95858;--red-soft:#ffebeb;--navy:#3e4a45;--shadow:0 18px 50px #5244301f;--radius:20px;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;color:var(--ink);background:radial-gradient(circle at 92% 8%, #8da6cc47, transparent 25rem), radial-gradient(circle at 8% 92%, #f7d89a47, transparent 28rem), var(--paper);margin:0;font-size:16px;line-height:1.5}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible{outline-offset:2px;outline:3px solid #df6d4152}.app-shell{min-height:100vh}.topbar{z-index:10;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#fcf7ede6;border-bottom:1px solid #e8dcc8e6;grid-template-columns:1fr auto 1fr;align-items:center;min-height:72px;padding:0 5vw;display:grid;position:sticky;top:0}.brand{width:max-content;color:var(--navy);letter-spacing:-.025em;background:0 0;border:0;align-items:center;gap:10px;padding:0;font-size:1.15rem;font-weight:800;display:flex}.brand-mark{color:#fff;background:var(--purple);border-radius:12px 12px 12px 4px;place-items:center;width:38px;height:38px;display:grid;position:relative;box-shadow:0 8px 20px #c4512e3d}.brand-mark:before,.brand-mark:after{content:"";border-radius:9px 9px 9px 2px;width:9px;height:9px;position:absolute;right:-3px}.brand-mark:before{background:var(--buttercream);top:-3px;transform:rotate(18deg)}.brand-mark:after{background:var(--morning-sky);top:7px;transform:rotate(72deg)}.topnav{gap:6px;display:flex}.nav-link{color:var(--muted);background:0 0;border:0;border-radius:999px;padding:9px 15px;font-size:.9rem;font-weight:700}.nav-link:hover,.nav-link.active{color:var(--ink);background:var(--surface)}.button{border:1px solid #0000;border-radius:14px;justify-content:center;align-items:center;gap:7px;min-height:46px;padding:0 20px;font-weight:750;transition:transform .16s,background .16s,box-shadow .16s;display:inline-flex}.button:hover{transform:translateY(-1px)}.button-primary{color:#fff;background:var(--purple);box-shadow:0 8px 18px #c4512e38}.button-primary:hover{background:var(--purple-dark)}.button-secondary{color:var(--ink);background:var(--surface);border-color:var(--line)}.button-ghost{color:var(--muted);background:0 0}.button-compact{justify-self:end;min-height:42px;padding:0 16px}.button-wide{width:100%}.button:disabled{cursor:not-allowed;opacity:.45;transform:none}main{width:min(1180px,90vw);margin:0 auto;padding:54px 0 80px}.page-head{justify-content:space-between;align-items:end;gap:24px;margin-bottom:26px;display:flex}.page-head h1{letter-spacing:-.055em;margin:2px 0 5px;font-size:clamp(2rem,4vw,3.25rem);line-height:1.08}.page-head p{color:var(--muted);margin:0}.eyebrow{color:var(--purple);letter-spacing:.13em;text-transform:uppercase;margin:0;font-size:.78rem;font-weight:850}.summary-strip{grid-template-columns:1.4fr 1fr 1fr;gap:14px;margin-bottom:34px;display:grid}.summary-card{border:1px solid var(--line);background:#ffffffb8;border-radius:18px;min-height:110px;padding:20px 22px}.summary-card.featured{color:var(--ink);background:linear-gradient(135deg, var(--morning-sky), var(--olive-grove));box-shadow:var(--shadow);border:0;justify-content:space-between;align-items:center;display:flex}.summary-label{color:var(--muted);font-size:.82rem;font-weight:700}.featured .summary-label{color:#2f302bb8}.summary-value{letter-spacing:-.04em;margin-top:5px;font-size:1.75rem;font-weight:850;display:block}.streak-orb{color:#934225;background:#f7d89ab3;border-radius:50%;place-items:center;width:62px;height:62px;font-size:1.65rem;display:grid}.section-title{justify-content:space-between;align-items:center;margin:0 0 16px;display:flex}.section-title h2{letter-spacing:-.025em;margin:0;font-size:1.25rem}.set-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.set-card{border:1px solid var(--line);border-top:4px solid var(--card-accent,var(--buttercream));border-radius:var(--radius);background:var(--surface);min-height:230px;padding:23px;transition:transform .18s,box-shadow .18s;position:relative;overflow:hidden;box-shadow:0 6px 24px #2222460d}.set-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}.set-card:after{content:"";background:var(--card-accent,var(--purple-soft));border-radius:50%;width:145px;height:145px;position:absolute;bottom:-55px;right:-35px}.set-meta{color:var(--muted);justify-content:space-between;align-items:center;font-size:.8rem;font-weight:700;display:flex}.lang-pill{color:#4c5d76;background:#e5ecf6;border-radius:999px;padding:5px 9px}.set-card h3{letter-spacing:-.025em;max-width:85%;margin:24px 0 6px;font-size:1.3rem;line-height:1.2}.set-card p{color:var(--muted);margin:0;font-size:.9rem}.set-card-actions{z-index:1;align-items:center;gap:9px;display:flex;position:absolute;bottom:20px;left:20px;right:20px}.set-open{color:#fff;background:var(--navy);border:0;border-radius:12px;flex:1;min-height:42px;font-weight:750}.set-delete{border:1px solid var(--line);width:42px;height:42px;color:var(--muted);background:#fff;border-radius:12px;font-size:1rem}.empty-state{border-radius:var(--radius);text-align:center;background:#ffffff80;border:1px dashed #cfd2e2;grid-column:1/-1;padding:70px 24px}.empty-icon{width:66px;height:66px;color:var(--purple);background:var(--purple-soft);border-radius:20px;place-items:center;margin:0 auto 18px;font-size:1.7rem;display:grid}.empty-state h3{margin:0 0 8px}.empty-state p{max-width:420px;color:var(--muted);margin:0 auto 20px}.study-header{align-items:center;gap:15px;margin-bottom:30px;display:flex}.back-button{border:1px solid var(--line);background:#fff;border-radius:13px;width:44px;height:44px;font-size:1.2rem}.study-header-copy{flex:1;min-width:0}.study-header h1{letter-spacing:-.04em;text-overflow:ellipsis;white-space:nowrap;margin:0;font-size:clamp(1.45rem,3vw,2.1rem);overflow:hidden}.study-header p{color:var(--muted);margin:3px 0 0;font-size:.88rem}.mode-tabs{background:#eceef5;border-radius:14px;gap:6px;padding:5px;display:flex}.mode-tab{min-height:38px;color:var(--muted);background:0 0;border:0;border-radius:10px;padding:0 14px;font-weight:750}.mode-tab.active{color:var(--ink);background:#fff;box-shadow:0 2px 8px #24264114}.study-layout{grid-template-columns:minmax(0,1fr) 270px;align-items:start;gap:22px;display:grid}.study-panel{border:1px solid var(--line);min-height:490px;box-shadow:var(--shadow);background:#fff;border-radius:24px;padding:28px}.progress-row{color:var(--muted);align-items:center;gap:12px;margin-bottom:25px;font-size:.82rem;font-weight:750;display:flex}.progress-track{background:#eceef4;border-radius:999px;flex:1;height:7px;overflow:hidden}.progress-fill{border-radius:inherit;background:linear-gradient(90deg, var(--canyon), var(--olive-grove));height:100%;transition:width .22s}.flashcard{border:1px solid var(--line);text-align:center;background:linear-gradient(145deg,#fff,#fafaff);border-radius:20px;place-items:center;min-height:320px;padding:30px;display:grid;position:relative;overflow:hidden}.flashcard:before{content:"";background:var(--purple-soft);border-radius:50%;width:150px;height:150px;position:absolute;top:-70px;right:-70px}.card-side-label{color:var(--muted);letter-spacing:.1em;text-transform:uppercase;font-size:.75rem;font-weight:800;position:absolute;top:20px;left:22px}.card-word{letter-spacing:-.055em;font-size:clamp(2rem,6vw,4.2rem);font-weight:850;line-height:1.05;position:relative}.card-hint{color:var(--muted);font-size:.8rem;position:absolute;bottom:20px}.card-controls{grid-template-columns:1fr 1.5fr 1fr;gap:10px;margin-top:16px;display:grid}.rating-controls{grid-template-columns:1fr 1fr;gap:10px;margin-top:16px;display:grid}.button-good{color:var(--green);background:var(--green-soft)}.button-again{color:var(--red);background:var(--red-soft)}.side-panel{border:1px solid var(--line);background:#ffffffb3;border-radius:20px;padding:22px}.side-panel h3{margin:0 0 16px;font-size:1rem}.word-list{gap:7px;max-height:398px;display:grid;overflow:auto}.word-row{color:var(--muted);background:#fff;border-radius:11px;grid-template-columns:1fr auto;gap:10px;padding:11px 12px;font-size:.84rem;display:grid}.word-row.current{color:var(--ink);background:var(--purple-soft);font-weight:750}.word-row.mastered{color:var(--green)}.quiz-question{min-height:315px}.quiz-question h2{letter-spacing:-.05em;margin:14px 0 28px;font-size:clamp(1.8rem,5vw,3.2rem)}.answers{grid-template-columns:1fr 1fr;gap:12px;display:grid}.answer{border:1px solid var(--line);min-height:64px;color:var(--ink);text-align:left;background:#fff;border-radius:15px;padding:12px 16px;font-weight:700}.answer:hover:not(:disabled){border-color:var(--purple);background:var(--purple-soft)}.answer.correct{color:var(--green);background:var(--green-soft);border-color:#8dd4bd}.answer.wrong{color:var(--red);background:var(--red-soft);border-color:#eeafaf}.quiz-feedback{min-height:42px;margin:18px 0 0;font-weight:750}.learn-question{max-width:680px;margin:0 auto}.learn-mode{color:var(--muted);align-items:center;gap:12px;display:flex}.learn-mode span:last-child{display:grid}.learn-mode strong{color:var(--ink);font-size:.9rem}.learn-mode small{font-size:.78rem}.learn-mode-icon{width:42px;height:42px;color:var(--purple);background:var(--purple-soft);border-radius:13px;place-items:center;font-size:.84rem;font-weight:850;display:grid}.learn-prompt{letter-spacing:-.05em;text-align:center;margin:44px 0 38px;font-size:clamp(2rem,6vw,4rem);font-weight:850;line-height:1.08}.write-answer-form{gap:11px;display:grid}.write-answer{width:100%;min-height:64px;color:var(--ink);background:#fff;border:2px solid #d9dce8;border-radius:15px;padding:0 18px;font-size:1.08rem}.write-answer:focus{border-color:var(--purple)}.write-answer.correct{color:var(--green);background:var(--green-soft);border-color:#78c8ae}.write-answer.wrong{color:var(--red);background:var(--red-soft);border-color:#e89b9b}.learn-feedback{border-radius:14px;gap:2px;margin-top:4px;padding:14px 16px;display:grid}.learn-feedback.success{color:var(--green);background:var(--green-soft)}.learn-feedback.error{color:var(--red);background:var(--red-soft)}.learn-feedback span{color:var(--ink);font-size:.88rem}.quiz-result{text-align:center;place-items:center;min-height:360px;display:grid}.result-ring{background:conic-gradient(var(--canyon) var(--score), #ece7dc 0);border-radius:50%;place-items:center;width:132px;height:132px;margin:0 auto 20px;display:grid}.result-ring:after{content:attr(data-score);background:#fff;border-radius:50%;place-items:center;width:102px;height:102px;font-size:1.6rem;font-weight:850;display:grid}.progress-page{max-width:900px;margin:0 auto}.progress-hero{color:#fff;box-shadow:var(--shadow);background:#526987;border-radius:26px;grid-template-columns:1.15fr .85fr;display:grid;overflow:hidden}.progress-copy{padding:38px}.progress-copy h1{letter-spacing:-.055em;margin:6px 0 12px;font-size:clamp(2rem,5vw,3.5rem);line-height:1}.progress-copy p{color:#ffffffad;max-width:500px}.progress-number{min-height:260px;color:var(--ink);background:linear-gradient(135deg, var(--buttercream), var(--olive-grove));place-items:center;font-size:4rem;font-weight:900;display:grid}.stat-grid{grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px;display:grid}.stat-card{border:1px solid var(--line);background:#fff;border-radius:18px;padding:24px}.stat-card span{color:var(--muted);font-size:.84rem;display:block}.stat-card strong{margin-top:8px;font-size:1.8rem;display:block}.dialog-backdrop{z-index:20;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#10122794;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.dialog-backdrop[hidden]{display:none}.dialog{background:#fff;border-radius:24px;width:min(680px,100%);max-height:min(820px,92vh);padding:28px;overflow:auto;box-shadow:0 30px 90px #0a0a1c4d}.dialog-header{justify-content:space-between;align-items:start;margin-bottom:22px;display:flex}.dialog-header h2{letter-spacing:-.04em;margin:3px 0 0;font-size:1.8rem}.icon-button{width:40px;height:40px;color:var(--muted);background:var(--paper);border:0;border-radius:12px;font-size:1.45rem}.field-label,.terms-heading{margin:0 0 8px;font-size:.84rem;font-weight:800;display:block}.text-input{width:100%;min-height:48px;color:var(--ink);background:#fff;border:1px solid #d9dce8;border-radius:12px;padding:0 14px}.text-input::placeholder{color:#a3a6b6}.terms-heading{justify-content:space-between;margin-top:22px;display:flex}.terms-hint{color:var(--muted);font-weight:600}.terms-list{gap:9px;display:grid}.term-row{grid-template-columns:1fr 1fr 38px;gap:9px;display:grid}.remove-term{color:var(--muted);background:var(--paper);border:0;border-radius:11px}.text-button{color:var(--purple);background:0 0;border:0;margin-top:13px;padding:8px 0;font-weight:800}.form-error{min-height:22px;color:var(--red);margin:8px 0 0;font-size:.84rem}.dialog-actions{justify-content:flex-end;gap:8px;margin-top:18px;display:flex}.toast{z-index:30;color:#fff;background:var(--navy);max-width:340px;box-shadow:var(--shadow);opacity:0;pointer-events:none;border-radius:13px;padding:13px 18px;transition:all .18s;position:fixed;bottom:24px;right:24px;transform:translateY(15px)}.toast.show{opacity:1;transform:translateY(0)}body.modal-open{overflow:hidden}.top-actions{justify-self:end;align-items:center;gap:9px;display:flex}.account-button{color:#fff;background:var(--purple);border:0;border-radius:50%;place-items:center;width:42px;height:42px;font-weight:850;display:grid;position:relative;box-shadow:0 7px 16px #c4512e33}.request-badge{border:2px solid var(--paper);min-width:20px;height:20px;color:var(--ink);background:var(--buttercream);border-radius:999px;place-items:center;padding:0 5px;font-size:.68rem;font-weight:900;display:grid;position:absolute;top:-6px;right:-7px}.loading-state{min-height:55vh;color:var(--muted);justify-content:center;align-items:center;gap:12px;font-weight:700;display:flex}.loader{border:3px solid #dddff0;border-top-color:var(--purple);border-radius:50%;width:22px;height:22px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.guest-hero{min-height:420px;color:var(--ink);background:radial-gradient(circle at 92% 12%, #df6d41eb 0 7rem, transparent 7.1rem), radial-gradient(circle at 74% 82%, #8da6cceb 0 9rem, transparent 9.1rem), var(--buttercream);box-shadow:var(--shadow);border:1px solid #aaa64847;border-radius:36px 36px 36px 12px;grid-template-columns:1.25fr .75fr;align-items:center;gap:36px;padding:48px;display:grid;position:relative;overflow:hidden}.guest-copy h1{letter-spacing:-.065em;max-width:720px;margin:8px 0 18px;font-size:clamp(2.5rem,6vw,5rem);line-height:.96}.guest-copy>p:not(.eyebrow){color:#2f302bbd;max-width:650px;font-size:1.05rem}.hero-actions{flex-wrap:wrap;gap:10px;margin-top:28px;display:flex}.guest-hero .button-secondary{color:var(--ink);background:#fffdf88c;border-color:#2f302b2e}.hero-demo{text-align:center;background:#fffdf8eb;border:1px solid #706d6329;border-radius:28px 28px 28px 9px;place-items:center;min-height:250px;padding:34px;display:grid;position:relative;transform:rotate(-2deg);box-shadow:0 24px 70px #5b472d29}.hero-demo strong{letter-spacing:-.05em;font-size:clamp(2rem,5vw,4rem)}.hero-demo>span:last-child{color:var(--muted);font-size:1.1rem}.demo-label{color:#77752f;letter-spacing:.12em;text-transform:uppercase;font-size:.73rem;font-weight:800;position:absolute;top:20px;left:22px}.saved-heading{align-items:end;margin-top:50px}.saved-heading h2{margin:5px 0 0}.folder-section{margin-top:34px}.folder-title{align-items:center;gap:9px;display:flex}.folder-icon{width:32px;height:32px;color:var(--purple);background:var(--purple-soft);border-radius:9px;place-items:center;font-weight:850;display:grid}.folder-empty{color:var(--muted);background:#ffffff73;border:1px dashed #cfd2e2;border-radius:16px;padding:24px}.mini-action{color:var(--muted);background:0 0;border:0;border-radius:9px;padding:7px 10px;font-size:.78rem}.mini-action:hover{color:var(--red);background:var(--red-soft)}.teacher-card-actions{gap:7px}.teacher-card-actions .set-delete{flex:0 0 39px;width:39px;height:42px}.share-study{flex:none}.dialog-note{color:var(--muted);margin:-8px 0 22px}.auth-password-label{margin-top:15px}.auth-switch{color:var(--purple);background:0 0;border:0;margin:16px auto 0;padding:6px;font-weight:750;display:block}.small-dialog{width:min(500px,100%)}.module-dialog{width:min(780px,100%)}.form-grid{grid-template-columns:1.25fr .75fr;gap:12px;margin-bottom:16px;display:grid}.language-row{grid-template-columns:1fr auto 1fr;align-items:end;gap:12px;margin-top:16px;display:grid}.language-row>span{color:var(--muted);padding-bottom:13px}.field-label small{color:var(--muted);font-weight:500}.confirmation-message{text-align:center;padding:20px 5px}.confirmation-message p{max-width:430px;color:var(--muted);margin:10px auto 22px}.access-management-button,.account-secondary-button{margin-bottom:10px}.access-state{place-items:center;min-height:62vh;display:grid}.access-state-card{border:1px solid var(--line);background:var(--surface);width:min(580px,100%);box-shadow:var(--shadow);text-align:center;border-radius:28px;padding:48px 34px}.access-state-card h1{letter-spacing:-.05em;margin:8px 0 12px;font-size:clamp(2rem,5vw,3rem);line-height:1.05}.access-state-card>p:not(.eyebrow){max-width:470px;color:var(--muted);margin:0 auto 24px}.access-dialog{width:min(720px,100%)}.loading-state.compact{min-height:220px}.access-summary{grid-template-columns:1fr 1fr;gap:10px;margin-bottom:18px;display:grid}.access-summary span{color:var(--muted);background:var(--paper);border-radius:14px;padding:14px 16px}.access-summary strong{color:var(--ink);font-size:1.2rem}.access-list{gap:9px;display:grid}.access-list-title{margin:25px 0 10px;font-size:1rem}.access-row{border:1px solid var(--line);background:#fff;border-radius:14px;justify-content:space-between;align-items:center;gap:16px;padding:14px 15px;display:flex}.access-row>div:first-child{min-width:0}.access-row strong,.access-row small,.access-status{text-overflow:ellipsis;display:block;overflow:hidden}.access-row strong{font-size:.92rem}.access-row small{color:var(--muted);font-size:.75rem}.access-status{color:var(--muted);margin-top:3px;font-size:.76rem;font-weight:750}.access-status.approved{color:var(--green)}.access-status.denied{color:var(--red)}.access-actions{flex:none;gap:6px;display:flex}.button-small{border-radius:11px;min-height:38px;padding:0 13px;font-size:.8rem}.access-empty{border:1px dashed var(--line);color:var(--muted);text-align:center;border-radius:14px;padding:26px}.invite-teacher-form{background:var(--paper);border-radius:16px;grid-template-columns:1fr auto;align-items:end;gap:10px;margin:0 0 18px;padding:16px;display:grid}.invite-teacher-form .field-label{margin-bottom:6px}.invite-teacher-form .form-error{grid-column:1/-1;margin:0}.credentials-box{border:1px solid var(--line);background:var(--paper);border-radius:16px;gap:3px;margin:0 0 18px;padding:18px;display:grid}.credentials-box span{color:var(--muted);margin-top:9px;font-size:.78rem;font-weight:750}.credentials-box span:first-child{margin-top:0}.credentials-box strong{overflow-wrap:anywhere;font-size:1rem}@media (width<=860px){.topbar{grid-template-columns:1fr auto;padding:0 4vw}.topnav{display:none}main{width:min(92vw,700px);padding-top:34px}.set-grid,.summary-strip{grid-template-columns:1fr 1fr}.summary-card.featured{grid-column:1/-1}.study-layout{grid-template-columns:1fr}.side-panel{display:none}.progress-hero{grid-template-columns:1fr}.progress-number{min-height:170px}.guest-hero{grid-template-columns:1fr}.hero-demo{display:none}}@media (width<=580px){.brand>span:last-child{display:none}.button-compact{padding:0 13px}.page-head{flex-direction:column;align-items:start}.summary-strip,.set-grid,.stat-grid{grid-template-columns:1fr}.summary-card.featured{grid-column:auto}.study-header{flex-wrap:wrap;align-items:start}.study-header-copy{flex:none;width:calc(100% - 64px)}.mode-tabs{width:100%}.mode-tab{flex:1}.study-panel{min-height:430px;padding:18px}.flashcard{min-height:285px}.card-controls{grid-template-columns:1fr 1fr}.card-controls .button-primary{grid-area:1/1/auto/-1}.answers{grid-template-columns:1fr}.term-row{grid-template-columns:1fr 38px}.term-row input:nth-child(2){grid-column:1}.term-row .remove-term{grid-area:1/2/span 2}.dialog{padding:22px}.top-actions .button-primary{display:none}.account-button{width:40px;height:40px}.guest-hero{min-height:440px;padding:30px 24px}.guest-copy h1{font-size:clamp(2.35rem,13vw,4rem)}.form-grid,.language-row{grid-template-columns:1fr}.language-row>span{display:none}.teacher-card-actions .set-delete{flex-basis:36px;width:36px}.share-study{order:3}.access-row{flex-direction:column;align-items:stretch}.access-actions{width:100%}.access-actions .button{flex:1}.invite-teacher-form{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important}}