:root{--ink:#11283b;--muted:#61717d;--paper:#f4f7f8;--card:#fff;--line:#dbe4e8;--navy:#0e3150;--blue:#146c86;--gold:#f5c451;--green:#2d7a65;--shadow:0 12px 36px rgba(16,49,80,.09)}
*{box-sizing:border-box}[hidden]{display:none!important}html{font-size:16px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Avenir Next",Inter,system-ui,-apple-system,sans-serif;line-height:1.5}.topbar{position:sticky;top:0;z-index:10;background:rgba(244,247,248,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px max(24px,calc((100vw - 1180px)/2))}.brand{display:flex;align-items:center;gap:12px;font-weight:750}.mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--navy);color:var(--gold);font-size:1.4rem}.progress-wrap{width:min(280px,38vw);font-size:.82rem;color:var(--muted)}.progress{height:7px;background:#dce5e8;border-radius:99px;overflow:hidden;margin-top:5px}.progress i{display:block;width:0;height:100%;background:var(--green);transition:width .25s}
main{max-width:1180px;margin:auto;padding:28px 24px 70px}.lesson-picker{display:flex;align-items:end;justify-content:space-between;gap:25px;background:#e7eef5;border:1px solid #ccd9e5;border-radius:16px;padding:14px 16px;margin-bottom:36px}.lesson-picker label{display:grid;gap:5px;min-width:min(520px,60vw);font-size:.76rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.lesson-picker select{height:46px;border:1px solid #b7c8d7;border-radius:11px;background:#fff;color:var(--ink);font:inherit;padding:0 12px}.lesson-picker p{margin:0;color:var(--muted);font-size:.9rem}.intro{display:grid;grid-template-columns:1.4fr 1fr;gap:50px;align-items:end;margin-bottom:34px}.eyebrow{margin:0 0 8px;color:var(--blue);font-weight:800;letter-spacing:.12em;text-transform:uppercase;font-size:.78rem}.intro h1{font-family:Georgia,serif;font-size:clamp(2.35rem,5vw,4.5rem);line-height:1;margin:0;letter-spacing:-.04em;max-width:800px}.lead{font-size:1.12rem;color:var(--muted);max-width:650px;margin:18px 0 0}.legend{display:flex;flex-wrap:wrap;gap:9px;justify-content:flex-end}.legend span{background:#e8eff2;border:1px solid #d1dee3;padding:8px 11px;border-radius:999px;color:#405766;font-size:.85rem}
.controls{background:var(--navy);color:#fff;border-radius:20px;padding:18px;display:grid;grid-template-columns:1.2fr .8fr auto auto auto;gap:12px;align-items:end;box-shadow:var(--shadow)}.controls label{display:grid;gap:6px;font-size:.76rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase}.controls label[hidden]{display:none}.controls input,.controls select{width:100%;height:45px;border:1px solid #ffffff3b;border-radius:11px;background:#fff;color:var(--ink);font:inherit;padding:0 13px}.button{min-height:45px;border:0;border-radius:11px;padding:0 16px;font:inherit;font-weight:750;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;text-decoration:none}.primary{background:var(--gold);color:#342800}.direction{background:#e7f1f4;color:var(--navy);border:1px solid #c8dde4}.direction[aria-pressed="true"]{background:#cde8df;color:#164c3d}.quiet{background:#ffffff16;color:#fff;border:1px solid #ffffff32}.status{min-height:52px;display:flex;justify-content:space-between;align-items:center;gap:12px;color:var(--muted);font-size:.9rem}.status strong{color:var(--ink)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.card{height:310px;perspective:1100px;cursor:pointer;outline:none}.card:focus-visible{border-radius:18px;box-shadow:0 0 0 4px #f5c45199}.card-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .48s cubic-bezier(.2,.75,.2,1)}.card.is-flipped .card-inner{transform:rotateY(180deg)}.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 5px 18px rgba(16,49,80,.045);display:flex;flex-direction:column;transition:border-color .18s,box-shadow .18s}.card:hover .face{box-shadow:var(--shadow)}.card.is-known .face{border-color:#84b9a8;background:#f7fcfa}.back{transform:rotateY(180deg)}.card-top{display:flex;justify-content:space-between;gap:12px;align-items:center}.number{color:#8a9aa4;font-variant-numeric:tabular-nums;font-size:.8rem}.category{font-size:.74rem;background:#edf2f4;color:#536873;border-radius:99px;padding:5px 9px}.prompt,.answer{display:flex;min-height:185px;flex:1;flex-direction:column;justify-content:center}.bulgarian-block{display:flex;flex-direction:column;align-items:flex-start}.bg{font-size:clamp(1.55rem,2.7vw,2.25rem);line-height:1.12;margin:0 0 7px;color:var(--navy);font-weight:760;overflow-wrap:anywhere}.latin{color:var(--blue);font-weight:700;margin:0 0 14px;overflow-wrap:anywhere}.nl{font-family:Georgia,serif;font-size:1.45rem;line-height:1.25;margin:0;color:var(--ink);overflow-wrap:anywhere}.flip-hint{color:#84939c;font-size:.76rem;margin-top:auto}.play{border:0;border-radius:10px;background:var(--navy);color:#fff;padding:9px 13px;font:inherit;font-weight:750;cursor:pointer}.play.is-playing{background:var(--blue)}.inline-play{font-size:.82rem;padding:8px 11px}.known{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:.86rem;cursor:pointer;margin-bottom:8px}.known input{width:18px;height:18px;accent-color:var(--green)}.empty{text-align:center;padding:70px 20px;color:var(--muted)}.more-wrap{text-align:center;padding:24px}.more{background:#dfe9ee;color:var(--navy);border:1px solid #c8d7df}.export-panel{margin-top:45px;border-radius:20px;background:#fff;border:1px solid var(--line);padding:24px;display:flex;align-items:center;justify-content:space-between;gap:25px;box-shadow:var(--shadow)}.export-panel h2{margin:0 0 4px;font-family:Georgia,serif}.export-panel p{margin:0;color:var(--muted)}.pdf{background:var(--navy);color:#fff;white-space:nowrap}footer{border-top:1px solid var(--line);max-width:1180px;margin:auto;padding:25px 24px 45px;color:var(--muted);font-size:.8rem}
.alphabet-overview{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}.alphabet-table-wrap{overflow-x:auto}.alphabet-table{width:100%;min-width:860px;border-collapse:collapse;text-align:left}.alphabet-table th,.alphabet-table td{padding:13px 18px;border-bottom:1px solid var(--line);vertical-align:middle}.alphabet-table thead th{background:#e7eef5;color:#405766;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase}.alphabet-table tbody tr:last-child>*{border-bottom:0}.alphabet-table tbody tr:nth-child(even){background:#f8fafb}.alphabet-letter{font-family:Georgia,serif;font-size:1.65rem;color:var(--navy);width:13%}.alphabet-name{font-weight:700;color:var(--ink);width:17%}.alphabet-latin{color:var(--blue);font-weight:750;width:19%}.alphabet-note{color:var(--muted);width:38%}.alphabet-table td:last-child{width:1%;white-space:nowrap}
.grammar-panel{margin-top:46px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(22px,4vw,38px);box-shadow:var(--shadow)}.grammar-panel>h2{font-family:Georgia,serif;font-size:clamp(1.8rem,3vw,2.5rem);line-height:1.15;margin:0 0 20px}.grammar-points{margin:0 0 30px;padding-left:22px;max-width:900px}.grammar-points li{margin:0 0 10px;padding-left:5px}.grammar-panel h3{margin:0 0 14px;font-size:1rem;text-transform:uppercase;letter-spacing:.07em;color:var(--blue)}.grammar-examples{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.grammar-example{display:flex;align-items:center;justify-content:space-between;gap:18px;background:#f4f7f8;border:1px solid var(--line);border-radius:14px;padding:16px}.grammar-example>div{min-width:0}.grammar-bg{font-size:1.15rem;font-weight:800;color:var(--navy);margin:0 0 3px}.grammar-latin{color:var(--blue);font-size:.9rem;font-weight:700;margin:0 0 5px}.grammar-nl{color:var(--muted);margin:0}.grammar-example .play{flex:0 0 auto}
@media(max-width:1050px){.controls{grid-template-columns:1fr 1fr auto}.quiet{grid-column:auto}}@media(max-width:900px){.lesson-picker{align-items:stretch;flex-direction:column}.lesson-picker label{min-width:0}.intro{grid-template-columns:1fr}.legend{justify-content:flex-start}.controls{grid-template-columns:1fr 1fr}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.grammar-examples{grid-template-columns:1fr}.export-panel{align-items:stretch;flex-direction:column}.pdf{white-space:normal}}@media(max-width:620px){.topbar{align-items:flex-start}.brand span:last-child{display:none}.progress-wrap{width:70vw}.intro{margin-bottom:25px}.controls{grid-template-columns:1fr}.grid{grid-template-columns:1fr}.card{height:295px}.button{width:100%}main{padding:20px 16px 55px}.topbar{padding:12px 16px}.lesson-picker{margin-bottom:28px}.alphabet-table th,.alphabet-table td{padding:11px 10px}.alphabet-table .inline-play{width:auto}.alphabet-letter{font-size:1.45rem}.grammar-example{align-items:flex-start;flex-direction:column}.grammar-example .play{width:auto}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}