:root{--bg: var(--tg-theme-bg-color, #ffffff);--bg2: var(--tg-theme-secondary-bg-color, #f2f3f5);--text: var(--tg-theme-text-color, #16191d);--hint: var(--tg-theme-hint-color, #8a9099);--link: var(--tg-theme-link-color, #2481cc);--btn: var(--tg-theme-button-color, #c8102e);--btn-text: var(--tg-theme-button-text-color, #ffffff);--card: var(--tg-theme-section-bg-color, var(--bg));--ok: #1f9d55;--ok-bg: rgba(31, 157, 85, .14);--bad: #d64545;--bad-bg: rgba(214, 69, 69, .14);--gold: #ffc400;--radius: 14px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;background:var(--bg2);color:var(--text)}body{font:15px/1.45 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}button{font:inherit;color:inherit}input{font:inherit;color:var(--text)}.screen{padding:14px 14px 32px;max-width:640px;margin:0 auto}.center-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;text-align:center}h1{font-size:22px;margin:4px 0 14px}h2{font-size:18px;margin:18px 0 10px}.hint{color:var(--hint);font-size:13px}.row{display:flex;gap:10px;align-items:center}.spacer{flex:1}.stack{display:grid;gap:10px}.card{background:var(--card);border-radius:var(--radius);padding:14px}.btn{display:block;width:100%;border:0;border-radius:12px;padding:13px 16px;background:var(--btn);color:var(--btn-text);font-weight:600;cursor:pointer}.btn:disabled{opacity:.5}.btn.secondary{background:var(--bg2);color:var(--text)}.btn.ghost{background:transparent;color:var(--link);padding:8px}.btn.ok{background:var(--ok);color:#fff}.btn.bad{background:var(--bad);color:#fff}.input{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--bg2);background:var(--bg);outline:none}.input:focus{border-color:var(--btn)}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{border:1px solid var(--bg2);background:var(--bg);border-radius:18px;padding:7px 13px;cursor:pointer}.chip.active{background:var(--btn);color:var(--btn-text);border-color:var(--btn)}.tiles{display:grid;grid-template-columns:1fr 1fr;gap:10px}.tile{position:relative;overflow:hidden;background:var(--card);border-radius:var(--radius);padding:14px;min-height:92px;border:0;text-align:left;cursor:pointer;display:flex;flex-direction:column;justify-content:space-between}.tile .icon{font-size:26px}.tile .title{font-weight:600}.tile.wide{grid-column:span 2}.tile.coming-soon{opacity:.5;filter:grayscale(1);cursor:default}.tile .stamp{position:absolute;top:38%;left:-10%;right:-10%;transform:rotate(-15deg);background:#0000008c;color:#fff;text-align:center;font-size:12px;font-weight:700;padding:4px 0;letter-spacing:.5px;text-transform:uppercase}.tile .lock{position:absolute;top:10px;right:12px}.daily-tile{background:linear-gradient(135deg,#c8102e,#ff8a00);color:#fff}.daily-tile .hint{color:#ffffffd9}.avatar{width:56px;height:56px;border-radius:50%;background:var(--bg2);object-fit:cover;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:22px}.avatar.small{width:36px;height:36px;font-size:15px}.progress{height:8px;background:var(--bg2);border-radius:4px;overflow:hidden}.progress>div{height:100%;background:var(--btn);transition:width .3s}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.stat{background:var(--bg2);border-radius:12px;padding:10px;text-align:center}.stat b{display:block;font-size:18px}.medal{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:10px;background:var(--gold);color:#3b2f00;font-weight:700;font-size:12px}.medal.expired{background:var(--bg2);color:var(--hint)}.league{font-size:12px;padding:2px 8px;border-radius:10px;background:var(--bg2)}.summer{background:linear-gradient(90deg,#ffd54f,#ff8a65);color:#4a2500}.flashcard{perspective:1000px;height:300px;cursor:pointer}.flashcard-inner{position:relative;width:100%;height:100%;transition:transform .45s;transform-style:preserve-3d}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:18px;background:var(--card);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;text-align:center}.flashcard-face.back{transform:rotateY(180deg)}.flashcard .main{font-size:28px;font-weight:700}.flashcard .sub{margin-top:8px;color:var(--hint);font-size:13px}.flashcard .example{margin-top:14px;font-style:italic}.sentence{font-size:19px;line-height:1.5}.gap-hint{display:block;margin-top:4px;color:var(--hint);font-size:13px}.option{width:100%;text-align:left;padding:13px 14px;border-radius:12px;border:2px solid transparent;background:var(--card);cursor:pointer}.option.correct{border-color:var(--ok);background:var(--ok-bg)}.option.wrong{border-color:var(--bad);background:var(--bad-bg)}.feedback{border-radius:12px;padding:12px}.feedback.ok{background:var(--ok-bg)}.feedback.bad{background:var(--bad-bg)}.match-cols{display:grid;grid-template-columns:1fr 1fr;gap:8px}.match-item{padding:12px 10px;border-radius:12px;background:var(--card);border:2px solid transparent;min-height:54px;cursor:pointer;text-align:center}.match-item.selected{border-color:var(--btn)}.match-item.done{opacity:.35;border-color:var(--ok);cursor:default}.match-item.wrong{border-color:var(--bad);background:var(--bad-bg)}.rating-row{display:flex;align-items:center;gap:10px;padding:9px 4px;border-bottom:1px solid var(--bg2);cursor:pointer}.rating-row.me{background:var(--bg2);border-radius:10px}.place{width:30px;text-align:center;font-weight:700;color:var(--hint)}.modal-backdrop{position:fixed;inset:0;background:#00000073;display:flex;align-items:flex-end;justify-content:center;z-index:50}.modal{background:var(--bg);width:100%;max-width:640px;border-radius:18px 18px 0 0;padding:18px 16px 28px;max-height:85vh;overflow:auto}.spinner{width:28px;height:28px;border:3px solid var(--bg2);border-top-color:var(--btn);border-radius:50%;animation:spin .8s linear infinite;margin:24px auto}@keyframes spin{to{transform:rotate(360deg)}}.error-box{background:var(--bad-bg);border-radius:12px;padding:12px}.tabs{display:flex;gap:6px;overflow-x:auto;padding-bottom:4px}.big-number{font-size:40px;font-weight:800;text-align:center}