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h3{letter-spacing:-.02em;margin-top:4px;font-size:16px}.curriculum-module{border-bottom:1px solid var(--line);position:relative}.curriculum-module:last-child{border-bottom:0}.curriculum-module summary{cursor:pointer;gap:5px;padding:18px 20px;font-weight:600;line-height:1.35;list-style:none;display:grid}.curriculum-module summary::-webkit-details-marker{display:none}.curriculum-module summary:after{content:"+";color:var(--muted);margin-top:3px;font-size:18px;font-weight:400;position:absolute;right:20px}.curriculum-module[open] summary:after{content:"−"}.curriculum-module summary small,.curriculum-lessons small{color:var(--muted);font-size:12px;font-weight:500}.curriculum-lessons{gap:2px;padding:0 10px 12px;display:grid}.curriculum a{border-radius:10px;grid-template-columns:20px minmax(0,1fr) auto;align-items:center;gap:8px;padding:10px;font-size:13px;line-height:1.35;transition:background .2s cubic-bezier(.16,1,.3,1);display:grid}.curriculum a:hover{background:#f5f6fb}.lesson-status{color:#fff;border:1px solid #b9c0d5;border-radius:50%;place-items:center;width:18px;height:18px;display:grid}.lesson-status.done{border-color:var(--link);background:var(--link)}.curriculum a[aria-current=page]{color:var(--link);background:#e9eeff;font-weight:600}.prose{max-width:72ch;font-size:17px}.prose>*+*{margin-top:20px}.prose h1,.prose h2,.prose h3{font-size:26px}.prose ul,.prose ol{padding-left:24px}.prose a{color:var(--link);text-decoration:underline}.prose p{color:#333b3c}.prose code{background:#f1f2ef;border-radius:4px;padding:3px 5px}.prose pre{white-space:pre-wrap;background:#f1f2ef;border-radius:12px;padding:18px}.certificate{background:#fdfdfc;border:1px solid #d7d7d2;gap:20px;padding:32px;display:grid;position:relative}.certificate:before{content:"";background:var(--accent);width:60px;height:5px}.mobile-only,.bottom-nav{display:none}.timer{font-variant-numeric:tabular-nums}.check-row{align-items:center;gap:12px;display:flex}.choice{border:1px solid var(--line);cursor:pointer;border-radius:12px;align-items:center;gap:14px;padding:16px;display:flex}.choice:has(:checked){border-color:var(--accent);background:var(--tint)}.steps{gap:8px;padding-bottom:16px;display:flex;overflow:auto}.steps button{white-space:nowrap;border:1px solid var(--line);background:#fff;border-radius:10px;min-height:44px;padding:10px 14px}.steps button[aria-current=step]{background:var(--accent);color:#fff}.mono{font-variant-numeric:tabular-nums;font-family:monospace}.wide{width:100%}.file-preview{width:100%;max-height:65dvh}.status-inline{min-height:22px;font-size:13px}.danger-text{color:var(--danger)}@media (prefers-reduced-motion:no-preference){.reveal{animation:.65s cubic-bezier(.16,1,.3,1) both reveal}@keyframes reveal{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}}@media (max-width:1050px){.hero{gap:32px}.hero-media img{height:380px}.feature-strip{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-strip .row:first-child{grid-area:auto/span 2;min-height:190px}.category-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.category:first-child{grid-area:auto/span 2;min-height:160px}.workspace{grid-template-columns:210px minmax(0,1fr)}.workspace-content{padding:28px 24px 70px}.topbar{padding:0 24px}.grid3{grid-template-columns:repeat(2,minmax(0,1fr))}.detail-grid{grid-template-columns:minmax(0,1fr) 310px;gap:28px}.nav{gap:18px}.lesson-shell{grid-template-columns:1fr}.curriculum{max-height:300px;position:static;overflow:auto}}@media (max-width:767px){.lesson-player-header{align-items:start;gap:18px;display:grid}.lesson-progress{grid-template-columns:auto minmax(90px,1fr) auto;width:100%}.lesson-viewport{border-radius:16px;min-height:240px}.lesson-viewport>.file-preview{max-height:52dvh}.lesson-detail{padding:20px}.wrap{padding:0 20px}.header{gap:10px;height:72px;padding-left:20px;padding-right:20px}.header .nav{display:none}.brand{font-size:18px}.hero{grid-template-columns:1fr;gap:28px;padding:36px 0}.hero h1{max-width:520px;font-size:48px}.hero p{font-size:16px}.hero-media img{border-radius:20px;height:280px}.feature-strip{grid-template-columns:1fr;gap:18px}.feature-strip .row:first-child{grid-column:auto;min-height:180px}.section{padding:40px 0}.category-grid{grid-template-columns:1fr 1fr;gap:10px}.category{padding:18px 14px;font-size:13px}.grid2,.grid3,.offer,.detail-grid{grid-template-columns:1fr}.offer{gap:20px;padding:28px}.offer h2{font-size:34px}.section-head{align-items:start}.section-head h2{font-size:28px}.section-head .text-link{white-space:nowrap;font-size:13px}.footer{margin-top:32px}.page-head{padding:32px 0 24px}.page-head h1{font-size:36px}.filter-bar{flex-wrap:wrap}.filter-bar>*{flex:1;min-width:120px;max-width:none}.auth{margin:28px 0;padding:24px}.workspace{display:block}.sidebar{display:none}.topbar{height:68px;padding:0 20px}.workspace-content{padding:28px 20px 100px}.workspace-content h1{font-size:32px}.mobile-only{display:inline-flex}.bottom-nav{z-index:30;border-top:1px solid var(--line);padding:8px 4px max(8px, env(safe-area-inset-bottom));background:#fff;justify-content:space-around;display:flex;position:fixed;bottom:0;left:0;right:0}.bottom-nav a{min-width:58px;min-height:44px;color:var(--muted);justify-items:center;gap:4px;font-size:11px;display:grid}.bottom-nav a[aria-current=page]{color:var(--link)}.metrics{gap:16px}.metric strong{font-size:28px}.metric small{font-size:12px}.panel{padding:22px}.purchase{position:static}.lesson-shell{gap:20px}.continue{padding:24px}.row{gap:12px}.list-row{flex-wrap:wrap;align-items:start}.search .btn{padding:10px}.hero-copy{gap:20px}.page-head+.tabs{margin-top:8px}}.sidebar{overflow-y:auto}.tabs [aria-pressed=true]{background:var(--ink);color:#fff}@media (max-width:400px){.header .brand{gap:7px;font-size:15px}.header .brand-mark{width:29px;height:33px}.header .btn{padding:10px 12px;font-size:12px}.header>.row{gap:10px;font-size:13px}.topbar>.row{gap:8px}.topbar .muted{font-size:13px}}@media (max-width:767px){.desktop-curriculum{display:none}}.titan-motion-hero{isolation:isolate;position:relative}.titan-wave-backdrop{z-index:-1;pointer-events:none;opacity:.2;background:linear-gradient(155deg, var(--canvas) 35%, var(--tint));border-radius:32px;position:absolute;inset:0 -24px;overflow:hidden;-webkit-mask-image:linear-gradient(#0000,#000 25% 65%,#0000);mask-image:linear-gradient(#0000,#000 25% 65%,#0000)}.titan-motion-hero .hero-copy{position:relative}.titan-focus-heading .focus-container{flex-direction:column;align-items:flex-start;gap:0;display:flex}.titan-focus-heading .focus-word{font:inherit;letter-spacing:inherit;line-height:inherit;cursor:default}.titan-focus-heading .corner{border-width:2px;border-radius:1px;width:12px;height:12px}.hero-motion-toggle{min-height:44px;font:inherit;color:var(--muted);cursor:pointer;background:0 0;border:0;align-items:center;gap:8px;margin-top:12px;padding:0 8px;font-size:12px;display:inline-flex}.titan-static-focus{display:block}@media (max-width:767px){.titan-wave-backdrop{opacity:.13;inset:0 -12px}}@media (prefers-reduced-motion:reduce){.titan-wave-backdrop canvas{display:none}.titan-focus-heading .focus-word{filter:none!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}