.wallpaper{z-index:var(--z-wallpaper);background:radial-gradient(at 30% 40%,#1a2040 0%,#0d1117 55%,#080b14 100%);position:fixed;inset:0;overflow:hidden}.wallpaper__blob{filter:blur(40px);pointer-events:none;border-radius:50%;position:absolute}.wallpaper__blob--blue{background:radial-gradient(circle,#0a84ff14 0%,#0000 70%);width:600px;height:300px;top:5%;left:10%}.wallpaper__blob--purple{filter:blur(50px);background:radial-gradient(circle,#bf5af212 0%,#0000 70%);width:500px;height:250px;bottom:15%;right:15%}.wallpaper__blob--green{background:radial-gradient(circle,#30d1580d 0%,#0000 70%);width:400px;height:200px;top:40%;right:25%}.menubar{height:28px;z-index:var(--z-menubar);-webkit-backdrop-filter:blur(24px);border-bottom:1px solid var(--border-subtle);-webkit-user-select:none;user-select:none;background:#141416b8;justify-content:space-between;align-items:center;padding:0 16px;display:flex;position:fixed;top:0;left:0;right:0}.menubar__left{align-items:center;gap:20px;display:flex}.menubar__apple{color:#fff;font-size:16px}.menubar__item{color:var(--text-primary);cursor:default;font-size:12.5px;font-weight:400}.menubar__item--bold{font-weight:600}.menubar__right{align-items:center;gap:16px;display:flex}.menubar__date{color:#ffffffbf;font-size:11.5px}.menubar__time{color:#fffffff2;font-size:12px;font-weight:500}@media (width<=768px){.menubar__left span:not(.menubar__apple){display:none}}.topic-icon{cursor:pointer;transition:transform var(--transition-normal);flex-direction:column;align-items:center;gap:8px;display:flex;transform:scale(1)translateY(0)}.topic-icon--hovered{transform:scale(1.08)translateY(-2px)}.topic-icon__wrapper{width:76px;height:76px;position:relative}.topic-icon__ring{pointer-events:none;position:absolute;top:0;left:0;transform:rotate(-90deg)}.topic-icon__box{border-radius:var(--radius-icon);border:1px solid #ffffff1f;justify-content:center;align-items:center;display:flex;position:absolute;inset:6px}.topic-icon__emoji{font-size:26px;line-height:1}.topic-icon__dot{background:#fff;border-radius:50%;width:5px;height:5px;position:absolute;bottom:2px;left:50%;transform:translate(-50%)}.topic-icon__label{flex-direction:column;align-items:center;gap:2px;display:flex}.topic-icon__name{color:var(--text-primary);text-shadow:0 1px 4px #0009;text-align:center;max-width:80px;font-size:11.5px;font-weight:500;line-height:1.2}.topic-icon__progress{color:var(--text-muted);font-size:10px}.app-grid__overlay{z-index:var(--z-desktop);pointer-events:none;justify-content:center;align-items:center;padding-top:44px;padding-bottom:100px;display:flex;position:fixed;inset:0}.app-grid{pointer-events:all;grid-template-columns:repeat(4,1fr);gap:28px 32px;display:grid}@media (width<=768px){.app-grid{grid-template-columns:repeat(2,1fr);gap:20px;padding:20px}}.dock{z-index:var(--z-dock);position:fixed;bottom:12px;left:50%;transform:translate(-50%)}.dock__bar{background:var(--bg-glass-light);-webkit-backdrop-filter:blur(32px);border:1px solid var(--border-medium);border-radius:22px;align-items:flex-end;gap:10px;padding:8px 16px;display:flex;box-shadow:0 8px 40px #00000080}.dock__item{cursor:pointer;flex-direction:column;justify-content:flex-end;align-items:center;width:56px;height:56px;transition:transform .15s;display:flex}.dock__icon{border:1px solid #ffffff1a;border-radius:14px;justify-content:center;align-items:center;width:56px;height:56px;display:flex}.dock__emoji{font-size:24px;line-height:1}.dock__dot{background:#ffffffb3;border-radius:50%;width:4px;height:4px;margin-top:3px}.sidebar{border-right:1px solid var(--border-subtle);background:var(--bg-sidebar);flex-direction:column;flex-shrink:0;width:200px;display:flex;overflow:hidden}.sidebar__header{flex-shrink:0;padding:12px 12px 8px}.sidebar__topic-info{align-items:center;gap:8px;margin-bottom:10px;display:flex}.sidebar__icon{border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:30px;height:30px;font-size:14px;display:flex}.sidebar__topic-name{color:#fff;font-size:12px;font-weight:600;line-height:1.2}.sidebar__pattern-count{color:var(--text-muted);margin-top:1px;font-size:10px}.sidebar__progress-track{background:#ffffff14;border-radius:2px;height:3px;margin-bottom:8px;overflow:hidden}.sidebar__progress-fill{border-radius:2px;height:100%;transition:width .4s}.sidebar__search{border-radius:var(--radius-sm);border:1px solid var(--border-input);width:100%;color:var(--text-primary);box-sizing:border-box;background:#ffffff0f;outline:none;padding:5px 8px;font-size:11.5px}.sidebar__search::placeholder{color:var(--text-muted)}.sidebar__list{flex:1;margin:0;padding:4px 6px;list-style:none;overflow:auto}.sidebar__item{cursor:pointer;transition:background var(--transition-fast), border-color var(--transition-fast);border:1px solid #0000;border-radius:8px;align-items:center;gap:8px;margin-bottom:2px;padding:8px 10px;display:flex}.sidebar__item:not(.sidebar__item--active):hover{background:var(--bg-hover)}.sidebar__check{color:#000;width:16px;height:16px;transition:background var(--transition-normal), border-color var(--transition-normal);border:1.5px solid;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:9px;font-weight:700;display:flex}.sidebar__pattern-name{color:var(--text-secondary);font-size:12px;font-weight:400;line-height:1.3}.sidebar__pattern-name--active{color:#fff;font-weight:500}.sidebar__empty{color:var(--text-muted);text-align:center;padding:12px 10px;font-size:12px}@media (width<=768px){.window-content{flex-direction:column}.sidebar{width:100%;height:180px;overflow-y:auto}.window-content__main{flex:1;overflow-y:auto}}.code-block{border-radius:var(--radius-md);border:1px solid var(--border-subtle);margin-top:10px;overflow:hidden}.code-block__header{background:var(--bg-overlay-dark);border-bottom:1px solid #ffffff0f;justify-content:space-between;align-items:center;padding:6px 14px;display:flex}.code-block__lights{gap:6px;display:flex}.code-block__light{border-radius:50%;width:10px;height:10px;display:block}.code-block__lang{color:var(--text-muted);font-size:11px;font-family:var(--font-mono)}.code-block__copy{cursor:pointer;color:var(--text-muted);transition:color var(--transition-fast);background:0 0;border:none;border-radius:4px;padding:2px 8px;font-size:11px}.code-block__copy:hover{color:var(--text-primary)}.code-block__copy--done{color:var(--color-easy)!important}.code-block__pre{background:var(--bg-overlay);font-family:var(--font-mono);color:#e2e8f0;white-space:pre;max-height:340px;margin:0;padding:16px 18px;font-size:12.5px;line-height:1.65;overflow:auto}.question-card{background:var(--bg-hover);border:1px solid var(--border-subtle);border-radius:var(--radius-md);transition:background var(--transition-fast), border-color var(--transition-fast);padding:10px 14px;text-decoration:none;display:block}.question-card:hover{background:var(--bg-hover-strong);border-color:var(--border-medium)}.question-card__meta{align-items:center;gap:8px;margin-bottom:4px;display:flex}.question-card__badge{letter-spacing:.3px;border-radius:5px;padding:2px 7px;font-size:10.5px;font-weight:600}.question-card__lc{color:var(--text-hint);font-size:10px}.question-card__arrow{color:var(--text-hint);margin-left:auto;font-size:10px}.question-card__title{color:#ffffffe0;font-size:13px;font-weight:500}.question-card__desc{color:var(--text-muted);margin-top:3px;font-size:11.5px;line-height:1.4}.pattern-view{flex-direction:column;height:100%;display:flex;overflow:hidden}.pattern-view__header{flex-shrink:0;justify-content:space-between;align-items:center;padding:14px 20px 12px;display:flex}.pattern-view__title{color:#fff;margin:0;font-size:18px;font-weight:600}.pattern-view__complete-btn{border-radius:var(--radius-pill);border:1px solid var(--border-subtle);background:var(--bg-hover);color:var(--text-secondary);transition:background var(--transition-normal), color var(--transition-normal), border-color var(--transition-normal);padding:5px 14px;font-size:12px;font-weight:500}.pattern-view__complete-btn--done{color:var(--color-easy);border-color:var(--color-easy);background:#30d1582e}.pattern-view__tabs{border-bottom:1px solid var(--border-subtle);flex-shrink:0;gap:4px;padding:0 20px;display:flex}.pattern-view__tab{color:var(--text-muted);cursor:pointer;transition:color var(--transition-fast), border-color var(--transition-fast);background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-1px;padding:7px 16px;font-size:12.5px;font-weight:400}.pattern-view__tab--active{color:#fff;border-bottom-color:#0a84ff;font-weight:600}.pattern-view__content{flex:1;padding:16px 20px;overflow:auto}.pattern-view__para{color:#ffffffd1;margin:0 0 10px;font-size:13.5px;line-height:1.75}.pattern-view__para--bullet{color:#ffffffbf;padding-left:8px}.pattern-view__filters{gap:6px;margin-bottom:14px;display:flex}.pattern-view__filter-btn{border-radius:var(--radius-pill);color:var(--text-muted);cursor:pointer;transition:background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);background:0 0;border:1px solid #ffffff1a;padding:4px 12px;font-size:11.5px}.pattern-view__filter-btn--active[data-diff=all]{background:var(--bg-hover-strong);color:#fff;border-color:#fff3}.pattern-view__filter-btn--active[data-diff=easy]{background:var(--color-easy-bg);color:var(--color-easy);border-color:var(--color-easy)}.pattern-view__filter-btn--active[data-diff=medium]{background:var(--color-medium-bg);color:var(--color-medium);border-color:var(--color-medium)}.pattern-view__filter-btn--active[data-diff=hard]{background:var(--color-hard-bg);color:var(--color-hard);border-color:var(--color-hard)}.pattern-view__questions{flex-direction:column;gap:8px;display:flex}.window-content{height:100%;display:flex;overflow:hidden}.window-content__main{flex-direction:column;flex:1;display:flex;overflow:hidden}.window-content__empty{height:100%;color:var(--text-muted);justify-content:center;align-items:center;font-size:14px;display:flex}@media (width<=768px){.window-content{flex-direction:column}.sidebar{width:100%;height:140px;overflow-y:auto}.window-content__main{flex:1;overflow-y:auto}}.draggable-window{border-radius:var(--radius-lg);background:var(--bg-glass);-webkit-backdrop-filter:blur(40px);border:1px solid var(--border-subtle);font-family:var(--font-system);flex-direction:column;transition:box-shadow .2s,border-color .2s;display:flex;position:fixed;overflow:hidden;box-shadow:0 12px 40px #00000080}.draggable-window--active{border-color:var(--border-strong);box-shadow:0 24px 80px #000000b3,0 0 0 .5px #ffffff0f}.draggable-window__titlebar{cursor:default;-webkit-user-select:none;user-select:none;background:#ffffff08;border-bottom:1px solid #ffffff0f;flex-shrink:0;align-items:center;height:44px;padding:0 16px;display:flex}.traffic-lights{align-items:center;gap:7px;display:flex}.traffic-light{cursor:pointer;width:12px;height:12px;transition:background var(--transition-fast);border:none;border-radius:50%;padding:0;box-shadow:0 0 0 .5px #00000040}.draggable-window__title{text-align:center;color:#fffc;pointer-events:none;flex:1;font-size:13px;font-weight:500}.draggable-window__title-spacer{width:52px}.draggable-window__body{height:100%;overflow:hidden}@media (width<=768px){.draggable-window__body{overflow:auto}}.login{background:radial-gradient(circle at top,#0f172a,#020617);flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.login__content{flex:1;justify-content:center;align-items:center;padding:20px;display:flex}.login__card{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#ffffff0d;border:1px solid #ffffff14;border-radius:16px;flex-direction:column;gap:18px;width:100%;max-width:380px;padding:28px;transition:transform .3s,box-shadow .3s;display:flex}.login__card:hover{transform:translateY(-6px)scale(1.02);box-shadow:0 20px 40px #0006}.login__title{color:#fff;text-align:center;font-size:26px;font-weight:600;transition:transform .3s}.login__card:hover .login__title{transform:translateY(-2px)}.login__subtitle{color:#fff9;text-align:center;font-size:14px}.login__form{flex-direction:column;gap:14px;display:flex}.login__form input{color:#fff;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:10px;outline:none;padding:14px;font-size:14px;transition:all .25s}.login__form input:focus{background:#ffffff14;border-color:#6366f1;box-shadow:0 0 0 2px #6366f166}.login__form input::placeholder{color:#fff6}.login__form button{color:#fff;cursor:pointer;background:linear-gradient(135deg,#6366f1,#8b5cf6);border:none;border-radius:10px;padding:14px;font-weight:600;transition:all .25s}.login__form button:hover{transform:translateY(-2px);box-shadow:0 8px 20px #6366f166}.login__form button:disabled{opacity:.7;cursor:not-allowed}.login__form button:active{transform:scale(.96)}@media (width<=768px){.login__card{padding:22px}}@keyframes fadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.login__card{animation:.6s fadeUp}.toast{color:#fff;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:99999;background:#14141ef2;border-radius:10px;padding:12px 18px;font-size:14px;transition:all .4s;position:fixed;bottom:-100px;left:50%;transform:translate(-50%)}.toast--show{bottom:30px}.footer{text-align:center;color:#ffffff80;width:100%;padding:12px 10px;font-size:12px}.footer .footer{text-align:center;color:#ffffff80;width:100%;margin-top:20px;padding:12px 10px;font-size:12px}.footer{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0003}@media (width<=768px){.footer{padding:10px;font-size:11px}}.loader{color:#fff;z-index:99999;background:radial-gradient(circle at top,#0f172a,#020617);flex-direction:column;justify-content:center;align-items:center;gap:20px;display:flex;position:fixed;inset:0}.loader__logo{letter-spacing:1px;font-size:24px;font-weight:600}.loader__bar{background:#ffffff1a;border-radius:999px;width:220px;height:6px;overflow:hidden}.loader__fill{background:linear-gradient(90deg,#6366f1,#8b5cf6);height:100%;transition:width .2s}.loader__text{color:#fff9;font-size:14px}.app{width:100vw;height:100vh;font-family:var(--font-system);position:relative;overflow:hidden}.app__bottom{z-index:var(--z-desktop);flex-direction:column;align-items:center;gap:6px;display:flex;position:fixed;bottom:90px;left:50%;transform:translate(-50%)}.app__hint{color:var(--text-muted);letter-spacing:.3px;text-align:center;white-space:nowrap;pointer-events:none;font-size:12px}@media (width<=768px){.app{overflow:auto}.app__bottom{padding:0 10px;bottom:70px}.app__hint{display:none}}:root{--color-easy:#30d158;--color-medium:#ff9f0a;--color-hard:#ff453a;--color-easy-bg:#30d1581f;--color-medium-bg:#ff9f0a1f;--color-hard-bg:#ff433a1f;--text-primary:#ffffffe6;--text-secondary:#ffffffa6;--text-muted:#fff6;--text-hint:#fff3;--bg-glass:#1c1c1ee0;--bg-glass-light:#ffffff14;--bg-overlay:#0000004d;--bg-overlay-dark:#0006;--bg-hover:#ffffff0a;--bg-hover-strong:#ffffff12;--bg-sidebar:#0003;--border-subtle:#ffffff12;--border-medium:#ffffff1f;--border-strong:#ffffff24;--border-input:#ffffff17;--radius-sm:7px;--radius-md:10px;--radius-lg:14px;--radius-icon:18px;--radius-pill:9999px;--font-system:-apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", sans-serif;--font-mono:"SF Mono", "Fira Code", "Consolas", monospace;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--z-wallpaper:0;--z-desktop:10;--z-window:500;--z-window-active:1000;--z-dock:9990;--z-menubar:9999;--transition-fast:.15s ease;--transition-normal:.2s ease}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-system);-webkit-font-smoothing:antialiased;background:#080b14;overflow:auto}button{cursor:pointer;font-family:inherit}a{text-decoration:none}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#ffffff40}