@keyframes skeletonMove{0%{background-position:-200% 0}to{background-position:200% 0}}.skeleton{background:linear-gradient(90deg,#f5d5e88c 25%,#ffe6f2e6 50%,#f5d5e88c 75%) 0 0/200% 100%;border-radius:12px;animation:1.5s ease-in-out infinite skeletonMove}body.dark .skeleton{background:linear-gradient(90deg,#421526b3 25%,#5a1c34e6 50%,#421526b3 75%) 0 0/200% 100%;animation:1.5s ease-in-out infinite skeletonMove}@keyframes rippleAnim{0%{opacity:.45;transform:scale(0)}to{opacity:0;transform:scale(4.5)}}.ripple-host{position:relative;overflow:hidden}.ripple-circle{pointer-events:none;transform-origin:50%;background:#ffffff8c;border-radius:50%;animation:.55s ease-out both rippleAnim;position:absolute}.ls-title-hero{letter-spacing:-.3px;font-size:clamp(18px,5vw,26px);line-height:1.25}.ls-title-card{letter-spacing:-.1px;font-size:clamp(13px,3.5vw,15px);line-height:1.4}.ls-title-quiz{font-size:clamp(12px,3vw,14px);line-height:1.3}.ls-question-text{letter-spacing:.1px;font-size:clamp(13px,3.8vw,15px);line-height:1.75}.ls-passage-text{letter-spacing:.15px;font-size:clamp(12px,3.2vw,14px);line-height:1.85}.ls-option-text{letter-spacing:.05px;font-size:clamp(13px,3.5vw,14px);line-height:1.6}.ls-label-sm{letter-spacing:.4px;font-size:clamp(10px,2.5vw,11px)}.ls-desc{letter-spacing:.1px;font-size:clamp(11px,3vw,13px);line-height:1.65}.ls-hist-title{letter-spacing:0;font-size:clamp(12px,3.2vw,13px);line-height:1.45}.ls-tf-text{letter-spacing:.1px;font-size:clamp(12px,3.4vw,13px);line-height:1.75}.ls-lesson-grid{grid-template-columns:1fr;gap:10px;display:grid}@media (width>=600px){.ls-lesson-grid{grid-template-columns:repeat(2,1fr);gap:12px}}@media (width>=900px){.ls-lesson-grid{grid-template-columns:repeat(3,1fr);gap:14px}}.ls-lesson-grid>.fade-up{flex-direction:column;height:100%;display:flex}.ls-section-gap{margin-bottom:20px}.ls-section-gap-lg{margin-bottom:28px}.ls-body-pad{padding:clamp(12px,4vw,20px) clamp(12px,4vw,20px) 80px}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility}:root{--ease-smooth:cubic-bezier(.22,1,.36,1);--ease-spring:cubic-bezier(.34,1.56,.64,1);--ease-out-expo:cubic-bezier(.16,1,.3,1);--shadow-xs:0 1px 2px #78285a0f;--shadow-sm:0 1px 2px #78285a0d, 0 3px 8px #78285a0f;--shadow-md:0 2px 4px #78285a0a, 0 8px 20px #a855f717;--shadow-lg:0 4px 10px #78285a0d, 0 16px 40px #a855f724;--shadow-xl:0 8px 20px #78285a14, 0 28px 64px #a855f72e;--shadow-sm-dark:0 1px 2px #0003, 0 3px 10px #00000038;--shadow-md-dark:0 2px 6px #00000038, 0 10px 26px #00000047;--shadow-lg-dark:0 4px 14px #00000042, 0 20px 48px #00000057;--glass-light:#ffffffb8;--glass-light-strong:#ffffffdb;--glass-dark:#1e0d159e;--glass-dark-strong:#1e0d15c7;--glass-blur:blur(18px) saturate(160%)}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-thumb{transition:background .2s var(--ease-smooth);border-radius:99px}::-webkit-scrollbar-thumb:hover{background:#ff8caa80!important}body.dark ::-webkit-scrollbar-thumb:hover{background:#c8507873!important}*{scrollbar-width:thin}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,a:focus-visible{outline-offset:2px;transition:outline-color .15s var(--ease-smooth);border-radius:8px;outline:2.5px solid #a855f78c}button,.fade-up,[class*=card],[class*=btn]{transition-timing-function:var(--ease-smooth)}button{-webkit-tap-highlight-color:transparent}img{transition:opacity .25s var(--ease-smooth)}::selection{color:inherit;background:#a855f73d}[class*=score],[class*=percent],[class*=pct]{font-variant-numeric:tabular-nums}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.glass-2026{background:var(--glass-light);-webkit-backdrop-filter:var(--glass-blur);box-shadow:var(--shadow-md);border:1px solid #ffffff80}body.dark .glass-2026{background:var(--glass-dark);box-shadow:var(--shadow-md-dark);border-color:#ffffff14}