@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap";
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-outline-style:solid}}}@layer theme{:root,:host{--radius-sm:.25rem;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4,0,.2,1);--default-font-family:"Inter",var(--font-geist-sans),-apple-system,sans-serif;--default-mono-font-family:"JetBrains Mono",var(--font-geist-mono),monospace}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI 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optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab,currentcolor 50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.absolute{position:absolute}.relative{position:relative}.sticky{position:sticky}.block{display:block}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline-flex{display:inline-flex}.transform{transform:var(--tw-rotate-x,)var(--tw-rotate-y,)var(--tw-rotate-z,)var(--tw-skew-x,)var(--tw-skew-y,)}.border{border-style:var(--tw-border-style);border-width:1px}.uppercase{text-transform:uppercase}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}@media (min-width:48rem){.md\:flex{display:flex}.md\:hidden{display:none}}}:root{--bg-primary:#0f0f13;--bg-secondary:#16161d;--bg-card:#1c1c27;--bg-card-hover:#22222f;--bg-accent:#2a2a3a;--text-primary:#e8e6f0;--text-secondary:#9d9baf;--text-muted:#6b6980;--accent-orange:#f97316;--accent-blue:#6366f1;--accent-green:#22c55e;--accent-purple:#a855f7;--accent-cyan:#06b6d4;--accent-pink:#ec4899;--accent-red:#ef4444;--border:#2a2a3a;--border-hover:#3a3a4f;--radius:16px;--radius-sm:10px;--shadow:0 4px 24px #0000004d;--background:#0f0f13;--foreground:#e8e6f0;--ease-out-expo:cubic-bezier(.16,1,.3,1);--ease-out-back:cubic-bezier(.34,1.56,.64,1);--ease-in-out-quart:cubic-bezier(.76,0,.24,1);--ease-spring:cubic-bezier(.22,1.36,.36,1)}[data-theme=light]{--bg-primary:#f8f9fa;--bg-secondary:#fff;--bg-card:#fff;--bg-card-hover:#f1f3f5;--bg-accent:#e9ecef;--text-primary:#1a1a2e;--text-secondary:#495057;--text-muted:#868e96;--border:#dee2e6;--border-hover:#ced4da;--shadow:0 4px 24px #00000014;--background:#f8f9fa;--foreground:#1a1a2e}*{box-sizing:border-box;margin:0;padding:0}html,body{overflow-x:hidden}body{background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;background-image:radial-gradient(at 20%,#6366f108 0%,#0000 50%),radial-gradient(at 80% 20%,#a855f706 0%,#0000 50%);background-attachment:fixed;font-family:Inter,-apple-system,sans-serif;line-height:1.7}body:before{content:"";pointer-events:none;z-index:-1;background-image:radial-gradient(circle at 1px 1px,#ffffff04 1px,#0000 0);background-size:32px 32px;position:fixed;inset:0}[data-theme=light] body{background-image:radial-gradient(at 20%,#6366f10a 0%,#0000 50%),radial-gradient(at 80% 20%,#a855f708 0%,#0000 50%)}[data-theme=light] body:before{background-image:radial-gradient(circle at 1px 1px,#00000005 1px,#0000 0)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--border-hover)}.card-hover{transition:border-color .25s var(--ease-out-expo),transform .3s var(--ease-out-back),box-shadow .3s var(--ease-out-expo),background .25s var(--ease-out-expo)}.card-hover:hover{border-color:var(--border-hover);background:var(--bg-card-hover);transform:translateY(-3px);box-shadow:0 8px 32px #00000040,0 0 0 1px #6366f114}.lesson-item{transition:background .2s var(--ease-out-expo),padding-left .25s var(--ease-out-expo)}.lesson-item:hover{background:var(--bg-card-hover);padding-left:28px}.term-card{transition:border-color .2s var(--ease-out-expo),box-shadow .2s var(--ease-out-expo),transform .25s var(--ease-out-back)}.term-card:hover{border-color:var(--border-hover);transform:translateY(-1px);box-shadow:0 4px 16px #0003}.sheet-card{transition:border-color .25s 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var(--ease-out-back)}.cta-secondary:hover{border-color:var(--border-hover);background:var(--bg-card-hover);transform:translateY(-2px)}.header-dark{background:#0f0f13d9}.header-light{background:#f8f9fad9}.header-nav-link{display:inline-block;position:relative}.header-nav-link:after{content:"";background:var(--accent-blue);width:0;height:2px;transition:width .25s var(--ease-out-expo);border-radius:1px;position:absolute;bottom:-4px;left:0}.header-nav-link:hover:after{width:100%}.header-nav-link:hover{color:var(--accent-blue)}.mobile-nav-link:hover{background:var(--bg-card)}.course-arrow{transition:transform .25s var(--ease-out-expo)}.card-hover:hover .course-arrow{transform:translate(4px)}.lesson-number{transition:all .2s var(--ease-out-expo)}.lesson-item:hover .lesson-number{border-color:var(--accent-blue);color:var(--accent-blue);background:#6366f11a}@keyframes stagger-in{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.stagger-item{animation:stagger-in .5s var(--ease-out-expo)calc(var(--stagger-index,0)*80ms)both}.fade-in{opacity:0;transition:opacity .5s var(--ease-out-expo),transform .5s var(--ease-out-expo);transform:translateY(16px)}.fade-in.visible{opacity:1;transform:translateY(0)}input:focus,textarea:focus{outline:none;box-shadow:0 0 0 3px #6366f126;border-color:var(--accent-blue)!important}.prose{color:var(--text-secondary)}.prose h1,.prose h2,.prose h3,.prose h4{color:var(--text-primary);letter-spacing:-.5px;font-weight:800}.prose h1{font-size:clamp(28px,5vw,40px)}.prose h2{margin-top:2.5em;font-size:clamp(22px,4vw,28px)}.prose p{color:var(--text-secondary)}.prose strong{color:var(--text-primary)}.prose a{color:var(--accent-blue);transition:border-color .2s var(--ease-out-expo);border-bottom:1px solid #0000;text-decoration:none}.prose a:hover{border-bottom-color:var(--accent-blue)}.prose ul{padding:0;list-style:none}.prose ul li{padding:6px 0 6px 28px;position:relative}.prose ul li:before{content:"▸";color:var(--accent-blue);font-weight:700;position:absolute;left:8px}.prose code{color:var(--accent-blue);background:#6366f11f;border-radius:6px;padding:2px 6px;font-family:JetBrains Mono,monospace;font-size:.85em}.prose pre{border:1px solid var(--border);border-radius:var(--radius-sm);color:#e8e6f0;padding:16px 20px;font-family:JetBrains Mono,monospace;font-size:13px;line-height:1.8;overflow-x:auto;background:#0d0d12!important}.prose pre code{color:inherit;font-size:inherit;background:0 0;border-radius:0;padding:0}[data-theme=light] .prose pre{color:#e8e6f0;background:#1e1e2e!important}.prose .table-wrapper{-webkit-overflow-scrolling:touch;border:1px solid var(--border);border-radius:14px;margin:16px 0;overflow-x:auto}.prose .table-wrapper table{border:none;border-radius:0;margin:0}.prose table{border-collapse:separate;border-spacing:0;border:1px solid var(--border);-webkit-overflow-scrolling:touch;border-radius:14px;width:100%;display:block;overflow:auto hidden}.prose thead{background:#6366f11f}.prose th{text-transform:uppercase;letter-spacing:1px;color:var(--accent-purple);text-align:left;border-bottom:1px solid var(--border);padding:12px 16px;font-size:.78rem;font-weight:700}.prose td{color:var(--text-secondary);border-bottom:1px solid #ffffff0a;padding:10px 16px;font-size:.9rem}.prose blockquote{border-left:3px solid var(--accent-purple);border-radius:0 var(--radius-sm)var(--radius-sm)0;background:#a855f714;margin:16px 0;padding:16px 20px}.prose img{border-radius:var(--radius-sm);border:1px solid var(--border);max-width:100%;height:auto;margin:16px 0}.copy-btn-wrapper{position:relative}.copy-btn-wrapper .copy-btn{background:var(--bg-accent);border:1px solid var(--border);color:var(--text-muted);cursor:pointer;transition:all .2s var(--ease-out-expo);border-radius:6px;padding:4px 10px;font-family:Inter,sans-serif;font-size:11px;position:absolute;top:10px;right:10px}.copy-btn-wrapper .copy-btn:hover{background:var(--border-hover);color:var(--text-primary)}.tool-card{background:var(--bg-card);border:1px solid var(--border);transition:border-color .25s var(--ease-out-expo),transform .3s var(--ease-out-back),box-shadow .3s var(--ease-out-expo),background .25s var(--ease-out-expo);border-radius:14px;align-items:center;gap:14px;padding:16px 20px;text-decoration:none;display:flex}.tool-card:hover{border-color:var(--border-hover);background:var(--bg-card-hover);transform:translateY(-2px);box-shadow:0 6px 24px #0003,0 0 0 1px #6366f10f}.tool-card .tool-icon{border-radius:11px;flex-shrink:0;justify-content:center;align-items:center;width:42px;height:42px;display:flex}.tool-card .tool-title{color:var(--text-primary);font-size:15px;font-weight:700}.topic-card{background:var(--bg-card);border:1px solid var(--border);transition:border-color .25s var(--ease-out-expo),transform .25s var(--ease-out-back),box-shadow .25s var(--ease-out-expo),background .25s var(--ease-out-expo);border-radius:12px;align-items:center;gap:12px;padding:14px 18px;text-decoration:none;display:flex}.topic-card:hover{border-color:var(--border-hover);background:var(--bg-card-hover);transform:translateY(-1px);box-shadow:0 4px 16px #00000026}.topic-card .topic-icon{width:36px;height:36px;color:var(--accent-blue);background:#6366f11a;border-radius:9px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.topic-card .topic-title{color:var(--text-primary);font-size:14px;font-weight:600}.locked-card{opacity:.45;pointer-events:none;cursor:default;position:relative}.lock-badge{background:var(--bg-accent);width:22px;height:22px;color:var(--text-muted);border-radius:6px;justify-content:center;align-items:center;display:flex;position:absolute;top:10px;right:10px}.section-label{text-transform:uppercase;letter-spacing:1.5px;color:var(--text-muted);margin-bottom:16px;font-size:11px;font-weight:700}.back-link{transition:color .2s var(--ease-out-expo)}.back-link:hover{color:var(--accent-blue)}.article-item{transition:all .2s var(--ease-out-expo);color:var(--text-secondary);background:0 0;border-left:2px solid #0000;font-weight:400}.article-item:hover{background:var(--bg-accent);color:var(--text-primary)}.article-item.article-active{color:var(--accent-blue);border-left-color:var(--accent-blue);background:#6366f126;font-weight:600}.article-item.article-active:hover{color:var(--accent-blue);background:#6366f133}.footer-social:hover{filter:brightness(1.2);transform:translateY(-2px)}@media (max-width:768px){.prose pre{padding:12px 14px;font-size:12px}.prose th,.prose td{padding:8px 10px;font-size:.8rem}.prose h1{font-size:24px}.prose h2{margin-top:1.8em;font-size:20px}.prose h3{font-size:17px}}::selection{color:#fff;background:#6366f14d}@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-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}