@import"https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,200..800;1,200..800&display=swap";@import"https://fonts.googleapis.com/css2?family=Crimson+Pro:ital,wght@0,200..900;1,200..900&display=swap";@import"https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/katex.min.css";:root{--primary: #9333ea;--primary-light: #a855f7;--primary-glow: rgba(147, 51, 234, .35);--secondary: #7e22ce;--font-sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;--font-serif: "Crimson Pro", serif;--bg: #09090b;--surface: rgba(24, 24, 27, .7);--surface-hover: rgba(39, 39, 42, .8);--text: #fafafa;--text-muted: #a1a1aa;--border: rgba(168, 85, 247, .15);--nav-bg: rgba(9, 9, 11, .82);--example-bg: rgba(168, 85, 247, .03);--card-shadow: 0 20px 40px -15px rgba(0, 0, 0, .7);--glass-border: rgba(168, 85, 247, .2);--success: #22c55e;--error: #ef4444;--primary-gradient: linear-gradient(135deg, #a855f7 0%, #9333ea 100%)}[data-theme=light]{--bg: #f5f3ff;--surface: rgba(255, 255, 255, .85);--surface-hover: rgba(255, 255, 255, .95);--text: #1e1b4b;--text-muted: #6d6d80;--border: rgba(139, 92, 246, .2);--nav-bg: rgba(245, 243, 247, .85);--example-bg: rgba(139, 92, 246, .05);--card-shadow: 0 20px 40px -15px rgba(109, 40, 217, .1);--glass-border: rgba(139, 92, 246, .25);--success: #16a34a;--error: #dc2626;--primary-gradient: linear-gradient(135deg, #9333ea 0%, #7e22ce 100%)}*{box-sizing:border-box;margin:0;padding:0;transition:background-color .5s cubic-bezier(.25,1,.5,1),color .5s cubic-bezier(.25,1,.5,1),border-color .5s cubic-bezier(.25,1,.5,1),box-shadow .5s cubic-bezier(.25,1,.5,1),transform .5s cubic-bezier(.25,1,.5,1)}html{scroll-behavior:smooth}body{min-height:100vh;font-family:var(--font-sans);background-color:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden;overflow-wrap:break-word}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at 0% 0%,rgba(168,85,247,.08) 0%,transparent 40%),radial-gradient(circle at 100% 100%,rgba(139,92,246,.08) 0%,transparent 40%),radial-gradient(circle at 50% 50%,rgba(167,139,250,.04) 0%,transparent 60%);z-index:-2;pointer-events:none}.glass-card{background:var(--surface);backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);border:1.5px solid var(--glass-border);box-shadow:var(--card-shadow);border-radius:28px}.text-gradient{background:linear-gradient(135deg,#c084fc,#7e22ce);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:inline-block;font-weight:800}.navbar{margin:1.5rem auto;width:90%;max-width:1000px;padding:.7rem 1.75rem;z-index:1000}.nav-container{display:flex;justify-content:space-between;align-items:center}@media(max-width:768px){.nav-container{flex-direction:column;gap:1rem}}.nav-logo{display:flex;align-items:center;gap:.75rem;font-size:1.4rem;font-weight:800;color:var(--text);text-decoration:none;letter-spacing:-.01em}.nav-right{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;justify-content:center}.nav-link{display:inline-flex;align-items:center;gap:.5rem;color:var(--text-muted);text-decoration:none;font-weight:700;font-size:.9rem;padding:.6rem 1rem;border-radius:12px;transition:all .3s ease;line-height:normal}.nav-link:hover{color:var(--text);background:#a855f71a}.theme-toggle{background:#a855f714;border:1px solid var(--border);color:var(--text);width:42px;height:42px;border-radius:14px;cursor:pointer;display:flex;align-items:center;justify-content:center}.theme-toggle:hover{background:var(--primary);color:#fff;transform:translateY(-2px);box-shadow:0 8px 16px var(--primary-glow)}.hero-header{padding:5rem 0 3rem;text-align:center;display:flex;flex-direction:column;align-items:center}.hero-badge{background:#a855f71f;padding:.5rem 1.5rem;border-radius:100px;color:var(--primary-light);font-weight:800;font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;margin-bottom:2rem;border:1px solid var(--border)}.hero-title{font-size:clamp(2rem,8vw,4rem);font-weight:900;letter-spacing:-.04em;margin-bottom:1.5rem;line-height:1.1;word-wrap:break-word}.main-content{max-width:1000px;margin:0 auto;padding:0 1.5rem 2rem}.section-card{margin-bottom:2rem;padding:2.5rem 3rem;width:100%}@media(max-width:768px){.section-card{padding:1.75rem}}@media(max-width:640px){.section-card{padding:1.25rem;margin-bottom:1.25rem}.section-header{flex-direction:column;align-items:flex-start;gap:1rem;margin-bottom:1.5rem}.nav-logo{font-size:1.2rem}.hero-header{padding:3rem 0 2rem}}.section-header{display:flex;align-items:center;gap:1.25rem;margin-bottom:3rem}.section-icon-wrapper{background:linear-gradient(135deg,#a855f7,#6b21a8);padding:1rem;border-radius:18px;color:#fff;box-shadow:0 10px 25px -5px var(--primary-glow)}.section-title{font-size:2rem;font-weight:800}.example-box{background:var(--example-bg);border-radius:22px;padding:2rem;margin:1.5rem 0;border:1.5px solid var(--border)}.example-title{font-weight:800;color:var(--primary-light)}.math-block-container{padding:1rem;background:#0003;border-radius:16px;margin:.75rem 0;border:1px solid rgba(255,255,255,.05)}.btn-reveal,.btn-reset{padding:.85rem 1.75rem;border-radius:16px;font-weight:800;font-size:.9rem;display:flex;align-items:center;justify-content:center;gap:.7rem;cursor:pointer;border:none;white-space:nowrap}.btn-reveal{background:var(--primary);color:#fff;box-shadow:0 10px 20px -5px var(--primary-glow)}.btn-reveal:hover{transform:translateY(-3px);background:var(--primary-light);box-shadow:0 15px 30px -5px var(--primary-glow)}.btn-reset{background:var(--surface);color:var(--text-muted);border:1.5px solid var(--border)}.btn-reset:hover{background:var(--surface-hover);color:var(--text);border-color:var(--primary-light)}.step-container{margin-top:1rem}.step-item{display:flex;gap:1.25rem;margin-bottom:1rem}.step-number-circle{width:32px;height:32px;background:var(--primary);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:800;color:#fff;flex-shrink:0}.step-content-box{background:var(--surface);padding:1.25rem 1.5rem;border-radius:18px;flex:1;border:1px solid var(--border);font-weight:600;font-family:var(--font-sans)!important;color:var(--text);line-height:1.6}.result-banner{margin-top:1.5rem;padding:1.25rem;border-radius:18px;font-weight:800;text-align:center;background:#a855f71a;color:var(--primary-light);border:1.5px solid var(--border)}.practice-input{width:100%;background:#ffffff0d;border:1.5px solid var(--border);border-radius:14px;padding:.8rem 1.2rem;color:var(--text);font-family:var(--font-sans);font-size:1rem;transition:all .3s ease;outline:none}.practice-input:focus{border-color:var(--primary-light);background:#ffffff14;box-shadow:0 0 0 4px var(--primary-glow)}.practice-input:disabled{opacity:.7;cursor:not-allowed;border-color:var(--success);color:var(--success)}.practice-box{transition:all .4s cubic-bezier(.16,1,.3,1)}.practice-box:hover{transform:translateY(-4px);border-color:var(--primary-light)}.responsive-wrapper{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}img,svg{max-width:100%;height:auto}.katex-display,.math-block-container{overflow-x:auto;overflow-y:hidden;padding:.5rem 0;max-width:100%;scrollbar-width:none;-ms-overflow-style:none}.katex-display::-webkit-scrollbar,.math-block-container::-webkit-scrollbar{display:none}@media(max-width:640px){.nav-link{padding:.8rem 1rem;width:100%;justify-content:center}.nav-right{width:100%;display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.nav-right .nav-link:last-child{grid-column:span 2}.theme-toggle{position:absolute;top:1.2rem;right:1.5rem}}