:root{--paper:#f6f5ef;--ink:#263e35;--muted:#6a756c;--green:#234b3d;--lime:#ddecab;--line:#dedfd4;--white:#fffefa;--error:#8e3f32;--shadow:0 8px 30px #243e3506;font-family:Inter,"Segoe UI",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;font-size:16px;line-height:1.55}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.6}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #8b9c49;outline-offset:4px}[hidden]{display:none!important}h1,h2,h3,p{margin:0}h1{font-size:clamp(2rem,4.5vw,3.45rem);font-weight:550;line-height:1.14;letter-spacing:-.045em}h2{font-size:1.45rem;line-height:1.3;font-weight:600;letter-spacing:-.025em}h3{font-size:1.03rem;font-weight:650}.muted{color:var(--muted)}.eyebrow{font-size:.7rem;letter-spacing:.13em;text-transform:uppercase;font-weight:700;color:var(--muted);margin-bottom:16px}.skip{position:fixed;top:-100px;left:12px;z-index:10;background:white;padding:12px}.skip:focus{top:12px}.header{height:90px;display:flex;align-items:center;gap:28px;border-bottom:1px solid var(--line);padding:0 5vw}.brand{text-decoration:none;display:flex;align-items:center;gap:10px;font-size:1.65rem;font-weight:650;letter-spacing:-.05em}.brand-dot{color:#8d9c4b}.subject{font-size:.78rem;color:var(--muted);letter-spacing:.025em}.subject span{padding:0 12px;color:#b3b9ac}.text-button{border:0;background:none;color:var(--muted);padding:12px 4px;font-size:.85rem}.header>.text-button{margin-left:auto}.layout{display:flex;max-width:1440px;margin:auto}.nav{padding:48px 24px 30px 0;flex:0 0 220px;margin-left:5vw}.nav a{display:flex;align-items:center;gap:12px;padding:12px 15px;margin-bottom:7px;text-decoration:none;border-radius:10px;font-size:.9rem}.nav a.active{background:#e6eadd;color:var(--green);font-weight:650}.nav a>span{font-size:1.35rem;width:20px;text-align:center}.nav-note{margin:50px 15px;font-size:.8rem;color:#8b9387;line-height:1.8}main{min-width:0;flex:1;padding:48px 5vw 70px 20px;max-width:1100px}main:focus{outline:none}.loading{padding:70px 0;text-align:center;color:var(--muted)}.greeting{font-size:.95rem;margin-bottom:26px;color:var(--muted)}.hero{background:#e9eddf;border:1px solid #dce3d1;border-radius:22px;padding:36px;position:relative;overflow:hidden;display:grid;grid-template-columns:1fr 170px;gap:20px}.hero-copy{position:relative;z-index:1}.hero h1{max-width:560px}.hero p{margin-top:18px;max-width:400px;font-size:.95rem;color:#5c6c5c}.hero .primary{margin-top:28px}.hero-note{font-size:.76rem!important;margin-top:10px!important}.plant{width:165px;height:230px;align-self:end;opacity:.85}.primary,.secondary{border:0;border-radius:10px;min-height:49px;padding:13px 22px;display:inline-flex;align-items:center;justify-content:center;gap:18px;text-decoration:none;font-weight:600;font-size:.92rem}.primary{background:var(--green);color:white}.primary:hover:not(:disabled){background:#315e4a}.secondary{border:1px solid var(--line);background:transparent;color:var(--ink)}.secondary:hover:not(:disabled){background:#ecefe4}.arrow{font-size:1.25rem}.section-title{margin:33px 0 16px;display:flex;justify-content:space-between;align-items:center}.section-title span{font-size:.8rem;color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.stat{padding:22px 24px;background:var(--white);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.stat-number{font-size:2rem;font-weight:550;letter-spacing:-.04em;line-height:1.2}.stat-label{font-size:.8rem;color:var(--muted);margin-top:9px}.how{display:flex;gap:16px;align-items:flex-start;background:#f0eee5;padding:22px 24px;border-radius:14px;margin-top:24px}.how-icon{background:#e4e4d7;border-radius:50%;width:34px;height:34px;display:grid;place-items:center;flex-shrink:0}.how p{font-size:.85rem;color:var(--muted);margin-top:5px}.pilot{color:var(--muted);font-size:.74rem;margin-top:22px;max-width:670px;line-height:1.7}.pilot summary{cursor:pointer}.pilot p{margin-top:8px}.login{max-width:520px;margin:40px auto;background:var(--white);border:1px solid var(--line);border-radius:22px;padding:38px}.login h1{font-size:2.4rem}.login p{margin:18px 0;color:var(--muted);font-size:.95rem}.login label{display:block;font-size:.85rem;margin:26px 0 8px}.login input{width:100%;border:1px solid var(--line);border-radius:9px;background:white;padding:12px}.login .primary{width:100%;margin-top:16px}.lesson-top{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:.82rem;color:var(--muted);margin-bottom:18px}.progress-track{height:4px;background:#e2e5d8;border-radius:5px;overflow:hidden;margin-bottom:28px}.progress-track progress{display:block;width:100%;height:4px;border:0;appearance:none}.progress-track progress::-webkit-progress-bar{background:#e2e5d8}.progress-track progress::-webkit-progress-value{background:#7d975a}.progress-track progress::-moz-progress-bar{background:#7d975a}.question-card{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:30px;box-shadow:var(--shadow)}.question-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);display:flex;justify-content:space-between;margin-bottom:20px}.prompt{white-space:pre-line;font-size:1.08rem;line-height:1.75;font-weight:450;letter-spacing:0}.answers{display:grid;gap:10px;margin-top:25px}.option{position:relative;display:flex;align-items:flex-start;gap:12px;border:1px solid var(--line);border-radius:10px;padding:14px 16px;cursor:pointer;font-size:.92rem;background:white}.option:hover{border-color:#9aa98a}.option:has(input:checked){border-color:var(--green);background:#edf2e4;box-shadow:0 0 0 1px var(--green)}.option:has(input:focus-visible){outline:3px solid #8b9c49;outline-offset:3px}.option:has(input:disabled){cursor:default}.option input{position:absolute;opacity:0;width:1px;height:1px}.option-letter{display:grid;place-items:center;min-width:27px;height:27px;border-radius:7px;background:#f1f2e9;font-size:.83rem;font-weight:650}.option:has(input:checked) .option-letter{background:var(--green);color:white}.option.correct-option{border-color:#789b60;background:#f0f6e5}.confidence{margin:24px 0 20px;padding:0;border:0}.confidence legend{color:var(--muted);font-size:.8rem;margin-bottom:10px}.confidence-options{display:flex;gap:7px;flex-wrap:wrap}.confidence label{position:relative;padding:8px 13px;border:1px solid var(--line);border-radius:8px;font-size:.79rem;cursor:pointer}.confidence label:has(input:checked){background:#e9eddc;border-color:#b7c59d}.confidence input{margin:0 6px 0 0;accent-color:var(--green);vertical-align:middle}.actions{display:flex;align-items:center;gap:14px}.actions .primary{flex:1}.actions .secondary{flex:0 1 auto}.feedback{padding:22px 24px;border:1px solid #bfd0a2;background:#f0f5e6;border-radius:13px;margin-top:22px;scroll-margin-top:20px}.feedback.wrong{background:#fbf0e6;border-color:#e8ccaf}.feedback h2{font-size:1.2rem}.feedback p{font-size:.92rem;margin-top:12px;white-space:pre-line}.feedback .key{font-weight:600}.feedback .next-date{font-size:.77rem;color:var(--muted);margin-top:16px}.feedback .primary{margin-top:20px;min-width:150px}.group{border:0;padding:0;margin:24px 0 0}.group legend{font-size:.95rem;font-weight:600}.group .answers{margin-top:12px}.matching-options{margin:22px 0;background:#f2f3ea;border-radius:10px;padding:16px 20px;list-style:none;font-size:.87rem}.matching-options li+li{margin-top:8px}.matching-row{display:grid;grid-template-columns:1fr minmax(150px,40%);gap:16px;align-items:center;margin:14px 0;font-size:.9rem}.matching-row select{border:1px solid #bfc8b7;border-radius:8px;background:white;color:var(--ink);width:100%;padding:11px;font-size:.85rem;text-overflow:ellipsis}.table-wrap{overflow:auto;margin:22px 0;max-width:100%;border:1px solid var(--line);border-radius:10px}table{border-collapse:collapse;width:100%;font-size:.82rem;min-width:320px}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line)}th{font-weight:600;background:#edf0e2}tr:last-child td{border-bottom:0}.summary{text-align:center;padding:32px 0}.summary .seal{width:68px;height:68px;display:grid;place-items:center;background:var(--lime);border-radius:50%;font-size:1.9rem;margin:0 auto 23px}.summary h1{font-size:2.7rem}.summary>p{color:var(--muted);margin:18px auto 28px;max-width:420px}.summary .stats{text-align:left;margin-bottom:28px}.summary .primary{margin-top:24px}.progress-page h1{font-size:2.7rem;margin-bottom:28px}.progress-page .stats{grid-template-columns:repeat(2,1fr)}.notice{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:10;max-width:550px;width:calc(100% - 32px);padding:17px 22px;border:1px solid #d4b7a7;background:#fff7ef;color:#774336;border-radius:12px;box-shadow:0 8px 35px #0002;font-size:.9rem}.error-panel{padding:24px;border:1px solid #e0c9b5;background:#fff6ed;border-radius:14px}.error-panel p{margin-bottom:15px}.resume-note{font-size:.8rem;color:var(--muted);margin-top:12px}.pending{padding:20px;background:#fff6ed;border:1px solid #dfc4a9;border-radius:12px;margin-top:20px}.pending p{margin-bottom:12px}.busy{pointer-events:none;opacity:.65}
@media(min-width:1400px){main{padding-right:60px}.nav{margin-left:60px}}
@media(max-width:1000px){.nav{flex-basis:175px;margin-left:20px;padding-right:16px}main{padding-right:30px}.hero{grid-template-columns:1fr 110px;padding:28px}.plant{width:115px}.stat{padding:20px 17px}}
@media(max-width:700px){.header{height:72px;padding:0 20px;gap:17px}.brand{font-size:1.4rem}.brand img{width:29px;height:29px}.subject{font-size:.64rem}.subject span{padding:0 4px}.header>.text-button{font-size:.75rem}.layout{display:block}main{padding:27px 18px 110px;max-width:none}.nav{position:fixed;bottom:0;left:0;right:0;z-index:5;margin:0;padding:8px 18px calc(8px + env(safe-area-inset-bottom));display:flex;justify-content:center;gap:10px;background:#f9f9f2f5;backdrop-filter:blur(12px);border-top:1px solid var(--line)}.nav a{margin:0;justify-content:center;flex:1;font-size:.8rem;padding:8px}.nav-note{display:none}.greeting{font-size:.85rem;margin-bottom:19px}.hero{padding:27px 24px;grid-template-columns:1fr;gap:0}.hero h1{font-size:2.5rem;max-width:300px}.hero p{max-width:270px;font-size:.87rem}.plant{position:absolute;right:-28px;bottom:20px;width:125px;height:185px;opacity:.28;pointer-events:none}.hero .primary{margin-top:24px;min-width:210px}.hero-note{font-size:.7rem!important}.eyebrow{font-size:.62rem;margin-bottom:14px}.section-title{margin-top:28px}.section-title h2{font-size:1.15rem}.section-title span{font-size:.7rem}.stats{gap:8px}.stat{padding:17px 12px;border-radius:12px}.stat-number{font-size:1.7rem}.stat-label{font-size:.68rem;line-height:1.5}.how{padding:18px 17px;gap:12px}.how p{font-size:.8rem}.how h3{font-size:.92rem}.pilot{font-size:.7rem}.question-card{padding:22px 18px;border-radius:14px}.prompt{font-size:1rem;line-height:1.7}.question-label{font-size:.63rem;gap:10px}.option{padding:12px;gap:10px;font-size:.88rem}.confidence label{padding:8px;font-size:.73rem}.actions{gap:10px}.actions .primary,.actions .secondary{font-size:.85rem;padding:12px 15px}.feedback{padding:20px 17px}.matching-row{grid-template-columns:1fr;gap:7px;margin:19px 0}.matching-row select{font-size:.9rem}.login{margin:15px auto;padding:28px 24px}.login h1{font-size:2.2rem}.summary{padding:25px 0}.summary h1,.progress-page h1{font-size:2.1rem}.summary .stats{grid-template-columns:repeat(2,1fr)}.notice{bottom:90px}.lesson-top{font-size:.73rem}.progress-page .stats{gap:12px}}
@media(prefers-reduced-motion:no-preference){.primary,.option{transition:background .16s,border-color .16s}.hero,.question-card{animation:appear .25s ease-out}@keyframes appear{from{opacity:.4;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}}

@media(max-width:420px){.header .subject{display:none}}

/* Progress: accessible, local charts and a Kyiv-time activity calendar. */
.progress-card{padding:28px;margin:28px 0;border:1px solid var(--line);border-radius:20px;background:var(--white)}
.progress-card>h2{margin-bottom:10px}.progress-card .eyebrow{margin-bottom:10px}
.chart-legend{display:flex;flex-wrap:wrap;gap:8px 20px;list-style:none;padding:0;margin:20px 0;font-size:.76rem;color:var(--muted)}
.chart-legend li{display:flex;align-items:center;gap:7px}.chart-legend i{display:inline-block;width:10px;height:10px;border-radius:50%;flex-shrink:0}
.legend-good,.activity-dot{background:#47795a}.legend-practice{background:#cc9447}.legend-unseen{background:#e7e9dd}.legend-planned{border:2px solid #867244;background:transparent}
.topic-section{border-top:1px solid var(--line)}.topic-section summary{padding:20px 0;cursor:pointer;list-style:none}.topic-section summary::-webkit-details-marker{display:none}
.section-name{display:flex;align-items:flex-start;gap:12px;font-weight:600;font-size:.95rem;line-height:1.45}.section-number{color:var(--muted);font-size:.8rem;line-height:1.8}.expand-icon{margin-left:auto;padding:0 5px;color:var(--muted)}.topic-section[open] .expand-icon{transform:rotate(45deg)}
.coverage-bar{display:block;width:100%;height:9px;margin:14px 0 8px;border-radius:6px;overflow:hidden}.coverage-unseen{fill:#e7e9dd}.coverage-good{fill:#47795a}.coverage-practice{fill:#cc9447}
.coverage-counts{display:flex;flex-wrap:wrap;justify-content:space-between;gap:3px 15px;font-size:.73rem;color:var(--muted)}.topic-empty{font-size:.76rem;color:var(--muted);margin-top:8px}
.topic-list{border-left:2px solid #e2e7d7;margin:0 0 20px 8px;padding-left:20px}.topic-row{padding:14px 0}.topic-row+.topic-row{border-top:1px dashed var(--line)}.topic-row h3{font-size:.85rem;font-weight:500;line-height:1.5}.topic-row h3>span{color:var(--muted)}.topic-row .coverage-bar{height:7px;margin-top:10px}
.chart-note{font-size:.76rem;color:var(--muted);line-height:1.65;margin-top:16px}
.calendar-nav{display:flex;align-items:center;justify-content:space-between;margin:22px 0 14px}.calendar-nav h3{text-transform:capitalize}.calendar-arrow{border:1px solid var(--line);border-radius:50%;width:42px;height:42px;background:var(--paper);color:var(--ink)}
.calendar-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px}.weekday{text-align:center;font-size:.75rem;color:var(--muted);padding:5px}
.calendar-day{border:1px solid transparent;border-radius:10px;min-width:0;min-height:58px;background:var(--paper);color:var(--ink);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;font-size:.86rem;padding:6px 0}
.calendar-day.day-active{background:#e1ead8}.calendar-day.day-today{border-color:#829770}.calendar-day[aria-pressed=true]{outline:2px solid var(--green);outline-offset:1px}.calendar-day:focus-visible{outline:3px solid #8b9c49;outline-offset:2px}
.day-markers{display:flex;gap:4px;min-height:7px}.day-markers i{display:block;width:6px;height:6px;border-radius:50%}.planned-dot{border:1.5px solid #867244}.calendar-detail{background:var(--paper);border-radius:12px;padding:16px;font-size:.84rem;min-height:102px}.calendar-detail h3{font-size:.9rem;margin-bottom:6px}
@media(max-width:600px){.progress-card{padding:20px 16px;margin:22px 0}.section-name{font-size:.88rem;gap:8px}.coverage-counts{font-size:.7rem}.chart-legend{gap:8px 14px;font-size:.7rem}.calendar-grid{gap:4px}.calendar-day{min-height:46px;border-radius:8px}.topic-list{padding-left:12px;margin-left:4px}.calendar-nav h3{font-size:.9rem}}