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#00000024}.file-link{color:#dce9ff;-webkit-backdrop-filter:blur(16px);background:linear-gradient(#4a84ff3d,#4a84ff1f),#ffffff0f;border:1px solid #72a5ff4d;border-radius:14px;align-items:center;gap:8px;min-height:42px;padding:10px 14px;text-decoration:none;transition:transform .18s,box-shadow .18s,border-color .18s;display:inline-flex;box-shadow:inset 0 1px #ffffff14,0 10px 24px #1a468c24}.file-link:hover{border-color:#85b4ff73;transform:translateY(-1px)}.file-link:before{content:"📎";font-size:15px;line-height:1}.reminder-card{background:radial-gradient(circle at 0 0,#72b7ff1f,#0000 34%),linear-gradient(#ffffff1a,#ffffff0a),#101c3a80;border:1px solid #ffffff24;border-radius:28px;padding:18px;position:relative;overflow:hidden;box-shadow:inset 0 1px #ffffff1f,0 18px 38px #0000002e}.reminder-grid{grid-template-columns:1fr 150px;gap:12px;margin-top:12px;display:grid}:root[data-theme=light] .lesson-main,:root[data-theme=light] .lesson-side-action,:root[data-theme=light] .materials-card,:root[data-theme=light] .reminder-card{background:linear-gradient(#ffffffd1,#f5f8ffb8),#ffffffc2;border-color:#4c66941a;box-shadow:inset 0 1px #ffffffbf,0 16px 28px #29437014}:root[data-theme=light] .lesson-meta{color:#112142ad}:root[data-theme=light] .lesson-meta-icon{color:#3b6fd3;background:#549aff1a}:root[data-theme=light] .material-item{background:#ffffffa3;border-color:#4c669414}:root[data-theme=light] .material-item-name,:root[data-theme=light] .materials-title,:root[data-theme=light] .lesson-time,:root[data-theme=light] .lesson-title{color:#112142}:root[data-theme=light] .materials-subtitle,:root[data-theme=light] .material-item-text{color:#112142a6}:root[data-theme=light] .file-link{color:#21457f;background:linear-gradient(#4c84ff1f,#4c84ff0f),#ffffffb8;border-color:#549aff38}@media (width<=720px){.lesson-card{flex-direction:column}.lesson-side-action{flex:none;width:100%}.reminder-grid{grid-template-columns:1fr}.lesson-time{font-size:40px}.lesson-title{font-size:24px}}.flappy-wrap{flex-direction:column;align-items:center;display:flex}.flappy-game{cursor:pointer;-webkit-user-select:none;user-select:none;background:linear-gradient(#bfe5ff 0%,#d8efff 58%,#c7f18c 58%,#d3f29b 100%);border-radius:28px;position:relative;overflow:hidden;box-shadow:inset 0 1px #ffffff61,0 18px 36px #00000029}.flappy-sky{background:linear-gradient(#c3ebff 0%,#dff2ff 100%);position:absolute;inset:0 0 26px}.flappy-ground{background:linear-gradient(#b8864c 0%,#c69557 100%);border-top:6px solid #7fc84c;height:26px;position:absolute;bottom:0;left:0;right:0}.flappy-ground:before{content:"";opacity:.28;background:linear-gradient(90deg,#00000014 0 10px,#0000 10px 22px);position:absolute;inset:0}.pipe{box-sizing:border-box;background:linear-gradient(#88d24b 0%,#5aa92d 100%);border:3px solid #376e169e;position:absolute}.pipe-top{border-radius:0 0 14px 14px;top:0}.pipe-bottom{border-radius:14px 14px 0 0}.bird{background:linear-gradient(#ffd960 0%,#f7bf28 100%);border-radius:8px;transition:transform 80ms linear;position:absolute;left:36px;box-shadow:inset 0 1px #ffffff4d,0 6px 10px #00000029}.bird:before{content:"";border-top:5px solid #0000;border-bottom:5px solid #0000;border-left:8px solid #ff9f2f;width:0;height:0;position:absolute;top:9px;right:-4px}.bird:after{content:"";background:#ff8f6f;border-radius:2px;width:7px;height:7px;position:absolute;bottom:-3px;left:6px;transform:rotate(18deg)}.bird-eye{background:#fff;border-radius:50%;width:8px;height:8px;position:absolute;top:5px;right:5px}.bird-eye:after{content:"";background:#222;border-radius:50%;width:3px;height:3px;position:absolute;top:2px;right:1px}.flappy-score-badge{color:#fff;-webkit-backdrop-filter:blur(12px);text-align:center;background:#121c3057;border-radius:16px;min-width:72px;padding:8px 12px;position:absolute;top:10px;right:10px;box-shadow:inset 0 1px #ffffff1f}.flappy-score-badge span{opacity:.72;font-size:11px;display:block}.flappy-score-badge strong{font-size:22px;line-height:1;display:block}.flappy-overlay,.flappy-result-overlay{justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.flappy-overlay{background:#00000014}.flappy-overlay-title{color:#1b2f15;text-shadow:0 1px #ffffff59;font-size:20px;font-weight:800}.flappy-overlay-subtitle{color:#1b2f15b8;text-align:center;margin-top:6px;font-size:13px}.flappy-result-overlay{background:#0c122124;padding:16px}.flappy-result-card{-webkit-backdrop-filter:blur(18px);text-align:center;color:#fff;background:linear-gradient(#ffffff24,#ffffff14),#101c388f;border:1px solid #ffffff24;border-radius:26px;width:min(100%,260px);padding:18px 16px;box-shadow:inset 0 1px #ffffff24,0 14px 34px #00000038}.flappy-result-title{margin-bottom:8px;font-size:28px;font-weight:800}.flappy-result-line{margin-top:4px;font-size:16px}.flappy-result-hint{opacity:.84;margin-top:14px;font-size:14px}.flappy-actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:14px;display:flex}.flappy-result-subtext{opacity:.7;margin-top:12px;font-size:13px}.flappy-game-full{width:100%;max-width:100%}