:root{color-scheme:light dark;--bg: #0f1115;--surface: #1a1d24;--surface-2: #22262f;--text: #f2f4f8;--muted: #a7b0c0;--accent: #5b8cff;--accent-2: #3d6fe6;--ok: #3dd68c;--bad: #ff6b6b;--border: #2e3440;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif}@media(prefers-color-scheme:light){:root{--bg: #f6f7fb;--surface: #ffffff;--surface-2: #eef1f7;--text: #12151c;--muted: #5c6575;--border: #dde2ec}}*{box-sizing:border-box}body{margin:0;min-height:100dvh;background:var(--bg);color:var(--text)}#root{min-height:100dvh}.screen{max-width:480px;margin:0 auto;padding:12px 14px 24px;min-height:100dvh;display:flex;flex-direction:column;gap:12px}.header{padding:8px 0 4px}.title{margin:0;font-size:1.35rem;letter-spacing:-.02em}.subtitle{margin:6px 0 0;color:var(--muted);font-size:.95rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:12px}.field-label{font-size:.85rem;color:var(--muted)}.field-label.spaced{margin-top:8px}.select-like{padding:12px 14px;border-radius:10px;background:var(--surface-2);border:1px solid var(--border);font-weight:600}.radio-group{display:flex;flex-direction:column;gap:8px}.radio-row{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--surface-2);cursor:pointer}.radio-row input{accent-color:var(--accent)}.topbar{display:flex;align-items:center;gap:8px;padding:4px 0 8px}.topbar-title{flex:1;text-align:center;font-weight:600;font-size:.95rem}.topbar-spacer{width:40px}.list{display:flex;flex-direction:column;gap:10px;flex:1}.topic-card{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px;border-radius:14px;border:1px solid var(--border);background:var(--surface)}.topic-meta{font-weight:600}.topic-desc{margin:4px 0 0;color:var(--muted);font-size:.9rem}.topic-count{margin-top:6px;font-size:.85rem;color:var(--muted)}.footer-card{margin-top:auto;padding:14px;border-radius:14px;border:1px solid var(--border);background:var(--surface);display:flex;flex-direction:column;gap:10px}.session-line{font-size:.95rem;color:var(--muted)}.btn-row{display:flex;flex-direction:column;gap:8px}.btn{border:none;border-radius:10px;padding:10px 14px;font-weight:600;cursor:pointer;font-size:.95rem}.btn.full{width:100%}.btn.primary{background:linear-gradient(180deg,var(--accent),var(--accent-2));color:#fff}.btn.secondary{background:var(--surface-2);color:var(--text);border:1px solid var(--border)}.btn.ghost{background:transparent;color:var(--text);width:40px}.exercise-card .prompt{margin:0;color:var(--muted);font-size:.9rem}.sentence{font-size:1.15rem;line-height:1.45;font-weight:600}.blank{display:inline-block;min-width:4.5ch;margin:0 4px;padding:0 4px 2px;border-bottom:2px dashed var(--muted);color:var(--muted);letter-spacing:.08em}.hints{display:flex;flex-direction:column;gap:6px;font-size:.92rem}.hint-label{color:var(--muted);margin-right:6px}.input{width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--border);background:var(--surface-2);color:var(--text);font-size:1rem}.feedback{display:flex;flex-direction:column;gap:10px}.feedback-ok{color:var(--ok);font-weight:700;font-size:1.1rem}.feedback-bad{color:var(--bad);font-weight:700;font-size:1.1rem}.expected{margin:0}.note{margin:0;color:var(--muted);font-size:.9rem}.muted{color:var(--muted);font-size:.95rem}.section-title{margin:0;font-size:1rem}.section-title.spaced{margin-top:8px}.stats{margin:0;padding-left:18px;color:var(--muted);line-height:1.5}code{font-size:.85em;background:var(--surface-2);padding:2px 6px;border-radius:6px}.muted.small{font-size:.85rem;margin:0}.drawer-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;opacity:0;pointer-events:none;transition:opacity .18s ease;z-index:30}.drawer-overlay.open{opacity:1;pointer-events:auto}.drawer{position:fixed;top:0;left:0;bottom:0;width:min(86vw,340px);background:var(--surface);border-right:1px solid var(--border);transform:translate(-100%);transition:transform .22s ease;z-index:40;display:flex;flex-direction:column;gap:14px;padding:14px 14px 24px;overflow-y:auto}.drawer.open{transform:translate(0)}.drawer-header{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-bottom:6px;border-bottom:1px solid var(--border)}.drawer-title{margin:0;font-size:1.05rem}.drawer-section{display:flex;flex-direction:column;gap:8px}.drawer-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.drawer-item{width:100%;display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--surface-2);color:var(--text);cursor:pointer;text-align:left;font:inherit}.drawer-item:hover,.drawer-item:focus-visible{background:var(--surface)}.drawer-item-main{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}.drawer-item-title{font-weight:600;font-size:.95rem}.drawer-item-sub{color:var(--muted);font-size:.85rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.drawer-item-chevron{color:var(--muted);font-size:1.4rem;line-height:1}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:none;align-items:center;justify-content:center;padding:16px;z-index:60}.modal-overlay.open{display:flex}.modal-card{width:100%;max-width:380px;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:12px;max-height:calc(100dvh - 32px);overflow-y:auto}.modal-header{display:flex;align-items:center;justify-content:space-between;gap:8px}.modal-title{margin:0;font-size:1.05rem}.lang-options{display:flex;flex-direction:column;gap:8px}.lang-option{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--surface-2);color:var(--text);cursor:pointer;font:inherit;text-align:left;transition:background .12s ease,border-color .12s ease}.lang-option:hover,.lang-option:focus-visible{background:var(--surface)}.lang-option.selected{border-color:var(--accent, #4f7cff);background:color-mix(in srgb,var(--accent, #4f7cff) 14%,var(--surface-2))}.lang-option-flag{display:inline-flex;align-items:center}.lang-option-flag svg{border-radius:2px;box-shadow:0 0 0 1px #00000014}.lang-chip svg{border-radius:2px;box-shadow:0 0 0 1px #00000014}.lang-option-name{flex:1;font-size:.95rem;font-weight:500}.lang-option-check{color:var(--accent, #4f7cff);font-weight:700}.lang-chip{display:inline-flex;align-items:center;gap:6px}.drawer-item-sub{display:inline-flex;align-items:center;gap:8px;flex-wrap:wrap}.drawer-item-arrow{opacity:.6}.drawer-item.placeholder{opacity:.7;cursor:default}.contextual-progress{display:flex;align-items:center;justify-content:space-between;gap:8px}.contextual-badge{font-size:.75rem;font-weight:600;padding:2px 8px;border-radius:999px;background:color-mix(in srgb,var(--accent) 20%,var(--surface-2));color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 40%,var(--border))}.new-word-card{display:flex;flex-direction:column;gap:4px;padding:10px 12px;border-radius:10px;border:1px dashed color-mix(in srgb,var(--accent) 40%,var(--border));background:color-mix(in srgb,var(--accent) 8%,var(--surface-2))}.new-word-title{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--accent)}.new-word-body{display:inline-flex;align-items:baseline;gap:8px;font-size:1.05rem}.sentence-translation{color:var(--muted);font-size:.95rem;line-height:1.4;font-style:italic}.blank.ok{color:var(--ok);border-bottom-color:var(--ok);border-bottom-style:solid}.blank.bad{color:var(--bad);border-bottom-color:var(--bad);border-bottom-style:solid}