@import"https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,300;0,14..32,400;0,14..32,500;0,14..32,600;0,14..32,700;0,14..32,800;0,14..32,900;1,14..32,400&display=swap";:root{--bg: #F3F6FF;--bg-card: #FFFFFF;--bg-dark: #0D1730;--bg-dark2: #162040;--primary: #3047F0;--primary-h: #1E35D6;--primary-50: #EAECFF;--teal: #0BA896;--teal-50: #E2F4F2;--amber: #F5A321;--amber-50: #FEF3DC;--violet: #7C3AED;--violet-50: #EDE9FE;--text: #1A2340;--text-muted: #5C6D8C;--border: #DCE3F4;--white: #FFFFFF;--r-sm: 8px;--r: 14px;--r-lg: 22px;--shadow-sm: 0 1px 8px rgba(15,35,90,.06);--shadow: 0 3px 18px rgba(15,35,90,.09);--shadow-md: 0 8px 36px rgba(15,35,90,.13)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:Inter,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}.app{display:flex;flex-direction:column;min-height:100vh}main{flex:1}@keyframes fadeUp{0%{opacity:0;transform:translateY(28px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.site-header{position:fixed;top:0;left:0;right:0;z-index:100}.header-bar{display:flex;align-items:center;justify-content:space-between;height:64px;padding:0 48px;background:#ffffffeb;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}.logo{font-size:16px;font-weight:800;letter-spacing:-.02em;color:var(--text)}.logo span{color:inherit}.nav{display:flex;align-items:center;gap:36px}.nav a{font-size:13px;font-weight:500;color:var(--text-muted);transition:color .2s}.nav a:hover,.nav a.active{color:var(--text)}.nav-cta{font-size:13px!important;font-weight:700!important;color:var(--primary)!important;padding:8px 18px;border:1.5px solid var(--primary);border-radius:var(--r-sm);transition:all .2s!important}.nav-cta:hover{background:var(--primary)!important;color:var(--white)!important}.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}.burger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s,opacity .25s}.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}.burger.open span:nth-child(2){opacity:0}.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.mob-nav{background:var(--white);border-bottom:1px solid var(--border);padding:24px 32px 32px;display:grid;gap:20px}.mob-nav a{font-size:18px;font-weight:600;color:var(--text)}.btn{display:inline-flex;align-items:center;gap:8px;font-family:Inter,sans-serif;font-size:13px;font-weight:700;letter-spacing:.02em;padding:13px 26px;border-radius:var(--r-sm);cursor:pointer;transition:all .2s;white-space:nowrap;border:none;text-decoration:none}.btn-primary{background:var(--primary);color:var(--white)}.btn-primary:hover{background:var(--primary-h);transform:translateY(-1px);box-shadow:0 4px 16px #3047f04d}.btn-outline-light{background:transparent;color:#ffffffbf;border:1.5px solid rgba(255,255,255,.2)}.btn-outline-light:hover{border-color:#ffffff8c;color:var(--white)}.btn-teal{background:var(--teal);color:var(--white)}.btn-teal:hover{background:#098f7e;transform:translateY(-1px)}.section-label{display:inline-flex;align-items:center;gap:10px;font-size:11px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--primary);margin-bottom:14px}.section-label:before{content:"";width:20px;height:1.5px;background:var(--primary)}.section-label.teal{color:var(--teal)}.section-label.teal:before{background:var(--teal)}.section-label.white{color:#fff9}.section-label.white:before{background:#fff6}.section-title{font-size:clamp(2rem,3vw + .5rem,3.4rem);font-weight:800;letter-spacing:-.03em;line-height:1.08;color:var(--text)}.section-title.white{color:var(--white)}.section-sub{font-size:1.05rem;line-height:1.8;color:var(--text-muted);max-width:520px;margin-top:14px}.section-sub.white{color:#ffffff80}.hero{min-height:100vh;background:var(--bg-dark);display:flex;flex-direction:column;padding-top:64px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:-200px;right:-200px;width:800px;height:800px;background:radial-gradient(circle,rgba(48,71,240,.15) 0%,transparent 65%);pointer-events:none}.hero:after{content:"";position:absolute;bottom:-100px;left:-100px;width:500px;height:500px;background:radial-gradient(circle,rgba(11,168,150,.1) 0%,transparent 65%);pointer-events:none}.hero-inner{flex:1;display:flex;flex-direction:column;justify-content:center;padding:80px 64px;max-width:1160px;margin:0 auto;width:100%;position:relative;z-index:1}.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:11px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--teal);margin-bottom:28px;animation:fadeIn .7s ease both}.hero-eyebrow:before{content:"";width:24px;height:1.5px;background:var(--teal)}.hero-title{font-size:clamp(3.5rem,6vw + 1rem,8rem);font-weight:900;line-height:.95;letter-spacing:-.04em;color:var(--white);margin-bottom:32px;animation:fadeUp .9s cubic-bezier(.16,1,.3,1) .1s both}.hero-title .blue{color:#7e99ff}.hero-sub{font-size:1.1rem;line-height:1.75;color:#ffffff80;max-width:500px;margin-bottom:40px;animation:fadeUp .9s cubic-bezier(.16,1,.3,1) .2s both}.hero-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap;animation:fadeUp .9s cubic-bezier(.16,1,.3,1) .3s both}.hero-bar{display:flex;align-items:center;justify-content:space-between;padding:22px 64px;border-top:1px solid rgba(255,255,255,.07);position:relative;z-index:1;animation:fadeIn 1s ease .5s both;flex-wrap:wrap;gap:20px}.hero-bar-label{font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:#ffffff40}.hero-stats{display:flex;gap:48px}.hero-stat-num{font-size:1.8rem;font-weight:800;letter-spacing:-.04em;color:var(--white);line-height:1}.hero-stat-label{font-size:11px;color:#ffffff4d;margin-top:3px}.grade-section{background:var(--white);padding:100px 64px}.grade-section-head{max-width:1160px;margin:0 auto 52px}.grade-grid{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:repeat(6,1fr);gap:10px}.grade-card{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:14px 8px;border:1.5px solid var(--border);border-radius:var(--r);background:var(--bg);cursor:pointer;text-decoration:none;transition:all .2s;gap:2px;aspect-ratio:1}.grade-card:hover{border-color:var(--primary);background:var(--primary-50);transform:translateY(-2px);box-shadow:var(--shadow)}.grade-card-num{font-size:1.25rem;font-weight:900;letter-spacing:-.04em;color:var(--primary);line-height:1}.grade-card-lbl{font-size:9px;font-weight:600;color:var(--text-muted)}.grade-card.research{grid-column:span 3;flex-direction:row;gap:12px;background:var(--teal-50);border-color:#0ba8964d;aspect-ratio:auto;padding:16px 20px}.grade-card.research:hover{background:var(--teal);border-color:var(--teal);transform:translateY(-3px);box-shadow:var(--shadow)}.grade-card.research:hover .grade-card-num,.grade-card.research:hover .grade-card-lbl{color:var(--white)}.grade-card.research .grade-card-num{font-size:1.3rem;color:var(--teal)}.grade-card.research .grade-card-lbl{font-size:13px;font-weight:600;color:var(--teal)}.grade-card.vbe{grid-column:span 3;flex-direction:row;gap:12px;background:var(--violet-50);border-color:#7c3aed40;aspect-ratio:auto;padding:16px 20px}.grade-card.vbe:hover{background:var(--violet);border-color:var(--violet);transform:translateY(-3px);box-shadow:var(--shadow)}.grade-card.vbe:hover .grade-card-num,.grade-card.vbe:hover .grade-card-lbl{color:var(--white)}.grade-card.vbe .grade-card-num{font-size:1.3rem;color:var(--violet)}.grade-card.vbe .grade-card-lbl{font-size:13px;font-weight:600;color:var(--violet)}.post-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r);padding:26px;transition:all .2s;display:flex;flex-direction:column;gap:10px}.post-card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-3px)}.post-card-badges{display:flex;gap:6px;flex-wrap:wrap}.badge{display:inline-flex;align-items:center;font-size:10px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:4px 9px;border-radius:100px}.badge-grade{background:var(--primary-50);color:var(--primary)}.badge-research{background:var(--teal-50);color:var(--teal)}.badge-vbe{background:var(--violet-50);color:var(--violet)}.badge-theme{background:var(--bg);color:var(--text-muted);border:1px solid var(--border)}.post-card-title{font-size:1.1rem;font-weight:700;letter-spacing:-.02em;color:var(--text);line-height:1.35}.post-card-excerpt{font-size:.9rem;line-height:1.75;color:var(--text-muted);flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.post-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:4px}.post-card-meta{font-size:11px;font-weight:500;color:var(--text-muted)}.post-card-link{font-size:12px;font-weight:700;color:var(--primary);letter-spacing:.04em;display:inline-flex;align-items:center;gap:4px;transition:gap .2s;flex-shrink:0}.post-card:hover .post-card-link{gap:8px}.posts-section{background:var(--bg);padding:100px 64px}.posts-section-head{max-width:1160px;margin:0 auto 44px;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}.posts-grid{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.vbe-section{background:var(--bg-dark);padding:100px 64px}.vbe-inner{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:1fr 2fr;gap:80px;align-items:center}.vbe-posts{display:grid;grid-template-columns:1fr 1fr;gap:18px}.vbe-card{background:#ffffff0a;border:1px solid rgba(255,255,255,.09);border-radius:var(--r);padding:22px;transition:all .2s;display:flex;flex-direction:column;gap:10px;text-decoration:none}.vbe-card:hover{background:#ffffff12;border-color:var(--violet)}.vbe-card-label{font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--violet)}.vbe-card-title{font-size:1rem;font-weight:700;color:var(--white);line-height:1.4}.vbe-card-excerpt{font-size:.87rem;line-height:1.7;color:#fff6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.vbe-card-meta{font-size:11px;color:#ffffff38;margin-top:auto}.blog-page{padding-top:64px;min-height:100vh}.blog-page-hero{background:var(--bg-dark);padding:56px 64px}.blog-page-hero-inner{max-width:1160px;margin:0 auto}.blog-filter-bar{background:var(--white);border-bottom:1.5px solid var(--border);padding:0 64px;position:sticky;top:64px;z-index:50}.blog-filter-inner{max-width:1160px;margin:0 auto;display:flex;gap:4px;overflow-x:auto;padding:12px 0;scrollbar-width:none}.blog-filter-inner::-webkit-scrollbar{display:none}.filter-btn{flex-shrink:0;font-family:Inter,sans-serif;font-size:12px;font-weight:600;padding:7px 15px;border-radius:100px;border:1.5px solid var(--border);background:transparent;color:var(--text-muted);cursor:pointer;transition:all .15s;white-space:nowrap}.filter-btn:hover{border-color:var(--primary);color:var(--primary)}.filter-btn.active{background:var(--primary);border-color:var(--primary);color:var(--white)}.filter-btn.active-research{background:var(--teal);border-color:var(--teal);color:var(--white)}.filter-btn.active-vbe{background:var(--violet);border-color:var(--violet);color:var(--white)}.blog-body{padding:48px 64px}.blog-body-inner{max-width:1160px;margin:0 auto}.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.blog-empty{text-align:center;padding:80px 0;color:var(--text-muted);font-size:1.05rem}.subject-filter-bar{background:var(--bg);border-bottom:1.5px solid var(--border);padding:0 64px}.subject-filter-inner{max-width:1160px;margin:0 auto;display:flex;align-items:center;gap:6px;padding:10px 0;flex-wrap:wrap}.subject-filter-label{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin-right:6px}.filter-btn.active-subject{background:var(--amber);border-color:var(--amber);color:var(--white)}.filter-btn:hover.active-subject{background:var(--amber)}.download-btn{display:inline-flex;align-items:center;gap:8px;background:var(--primary-50);border:1.5px solid var(--primary);color:var(--primary);padding:10px 18px;border-radius:var(--r-sm);font-size:.9rem;font-weight:600;text-decoration:none;transition:all .18s;margin:6px 0}.download-btn:hover{background:var(--primary);color:var(--white);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.theme-group{margin-bottom:56px}.theme-group-label{font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--text-muted);margin-bottom:20px;padding-bottom:12px;border-bottom:1.5px solid var(--border);display:flex;align-items:center;gap:10px}.theme-group-label:before{content:"";width:16px;height:2px;background:var(--border)}.post-page{padding-top:64px;min-height:100vh}.post-page-hero{background:var(--bg-dark);padding:56px 64px}.post-page-hero-inner{max-width:800px;margin:0 auto}.post-back{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:#ffffff59;transition:color .2s;margin-bottom:28px}.post-back:hover{color:#ffffffbf}.post-page-badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}.post-page-title{font-size:clamp(2rem,4vw + .5rem,3.5rem);font-weight:900;letter-spacing:-.04em;line-height:1.05;color:var(--white);margin-bottom:18px}.post-page-meta{font-size:13px;color:#ffffff59;display:flex;gap:16px;flex-wrap:wrap}.post-page-body{max-width:800px;margin:56px auto;padding:0 64px}.post-content{font-size:1.05rem;line-height:1.9;color:var(--text)}.post-content h1{font-size:1.8rem;font-weight:800;letter-spacing:-.03em;color:var(--text);margin:44px 0 16px;line-height:1.15}.post-content h2{font-size:1.45rem;font-weight:700;letter-spacing:-.02em;color:var(--text);margin:40px 0 14px}.post-content h3{font-size:1.15rem;font-weight:700;color:var(--text);margin:30px 0 10px}.post-content p{margin-bottom:18px}.post-content ul,.post-content ol{padding-left:22px;margin-bottom:18px}.post-content li{margin-bottom:6px}.post-content strong{font-weight:700;color:var(--text)}.post-content em{font-style:italic}.post-content a{color:var(--primary);text-decoration:underline;text-underline-offset:2px}.post-content a:hover{color:var(--primary-h)}.post-content blockquote{border-left:3px solid var(--primary);padding:14px 20px;margin:28px 0;background:var(--primary-50);border-radius:0 var(--r-sm) var(--r-sm) 0}.post-content blockquote p{margin:0}.post-content code{background:var(--border);padding:2px 6px;border-radius:4px;font-family:SF Mono,Fira Code,monospace;font-size:.88em}.post-content pre{background:var(--bg-dark);color:#ffffffd9;padding:20px 24px;border-radius:var(--r-sm);overflow-x:auto;margin-bottom:20px}.post-content pre code{background:none;padding:0;color:inherit}.post-content hr{border:none;border-top:1.5px solid var(--border);margin:36px 0}.site-footer{background:var(--bg-dark);border-top:1px solid rgba(255,255,255,.05);padding:48px 64px}.foot-inner{max-width:1160px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px}.foot-logo{font-size:16px;font-weight:800;letter-spacing:-.02em;color:#ffffffe6}.foot-logo span{color:inherit}.foot-links{display:flex;gap:28px;flex-wrap:wrap;align-items:center}.foot-links a{font-size:13px;color:#ffffff52;transition:color .2s}.foot-links a:hover{color:#ffffffb8}.foot-copy{font-size:12px;color:#ffffff2e}@media (max-width: 1024px){.posts-grid,.blog-grid{grid-template-columns:1fr 1fr}.vbe-inner{grid-template-columns:1fr;gap:48px}.vbe-posts{grid-template-columns:1fr 1fr}.grade-grid{grid-template-columns:repeat(4,1fr);gap:10px}.grade-card.research,.grade-card.vbe{grid-column:span 2}}@media (max-width: 768px){.nav{display:none}.burger{display:flex}.hero-inner{padding:56px 32px}.hero-bar{padding:20px 32px}.grade-section,.posts-section,.vbe-section{padding:72px 32px}.blog-page-hero{padding:44px 32px}.blog-filter-bar,.subject-filter-bar{padding:0 32px}.blog-body{padding:40px 32px}.post-page-hero{padding:44px 32px}.post-page-body{padding:0 32px;margin:44px auto}.site-footer{padding:40px 32px}.header-bar{padding:0 32px}.grade-grid{grid-template-columns:repeat(4,1fr);gap:8px}.grade-card.research,.grade-card.vbe{grid-column:span 2}.posts-grid,.blog-grid{grid-template-columns:1fr 1fr}.vbe-posts{grid-template-columns:1fr}.posts-section-head{align-items:flex-start;flex-direction:column}.hero-stats{gap:28px}}@media (max-width: 520px){.grade-grid{grid-template-columns:repeat(4,1fr);gap:6px}.grade-card{padding:10px 6px}.grade-card-num{font-size:1.1rem}.grade-card-lbl{font-size:8px}.grade-card.research,.grade-card.vbe{grid-column:span 4;padding:12px 16px}.hero-inner{padding:48px 20px}.hero-bar{padding:16px 20px}.grade-section,.posts-section,.vbe-section{padding:60px 20px}.blog-page-hero{padding:36px 20px}.blog-filter-bar{padding:0 20px}.blog-body{padding:32px 20px}.post-page-hero{padding:36px 20px}.post-page-body{padding:0 20px}.site-footer{padding:32px 20px}.header-bar{padding:0 20px}.hero-stats{display:none}.posts-grid,.blog-grid{grid-template-columns:1fr}.hero-title{font-size:clamp(2.8rem,10vw,4rem)}}