*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--primary:#1a6cf6;--primary-dark:#1450c0;--primary-light:#e8f0fe;--bg:#f8f9fc;--white:#fff;--text:#1e2432;--muted:#6b7280;--border:#e5e7eb;--shadow:0 1px 3px rgba(0,0,0,.08),0 4px 16px rgba(0,0,0,.06);--hover:0 4px 12px rgba(26,108,246,.15),0 8px 32px rgba(26,108,246,.1);--r:12px;--rs:8px}
html{scroll-behavior:smooth}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);line-height:1.65;font-size:15px}
a{text-decoration:none;color:var(--primary)}
header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:200;box-shadow:0 1px 8px rgba(0,0,0,.05)}
.hi{max-width:1280px;margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:18px;height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.logo-icon{width:36px;height:36px;background:var(--primary);border-radius:9px;display:flex;align-items:center;justify-content:center}
.logo-icon svg{width:20px;height:20px;fill:#fff}
.logo-text{font-family:'DM Serif Display',serif;font-size:22px;color:var(--text)}
.logo-text span{color:var(--primary)}
.sw{flex:1;max-width:480px;position:relative}
.sw input{width:100%;padding:9px 16px 9px 42px;border:2px solid var(--border);border-radius:50px;font-size:13px;font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--text);transition:all .2s;outline:none}
.sw input:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(26,108,246,.1)}
.si{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none;width:15px;height:15px}
.sdrop{position:absolute;top:calc(100% + 6px);left:0;right:0;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:0 8px 32px rgba(0,0,0,.12);display:none;z-index:300;max-height:360px;overflow-y:auto}
.sdrop.show{display:block}
.sri{display:flex;align-items:center;gap:11px;padding:10px 14px;cursor:pointer;transition:background .15s;color:var(--text)}
.sri:hover{background:var(--primary-light)}
.sri-ico{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.sri-name{font-weight:600;font-size:13px}
.sri-cat{font-size:11px;color:var(--muted)}
.hn{display:flex;align-items:center;gap:2px;margin-left:auto}
.hn a{padding:6px 12px;border-radius:8px;text-decoration:none;color:var(--muted);font-size:13px;font-weight:500;transition:all .15s;white-space:nowrap}
.hn a:hover,.hn a.act{background:var(--primary-light);color:var(--primary)}
.ad{background:#fff;border:1.5px dashed #d1d5db;border-radius:var(--r);display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:10px;letter-spacing:1px;text-transform:uppercase;font-weight:700}
.ad-l{width:100%;min-height:90px;margin:20px 0}
.ad-r{min-height:250px;width:100%}
.hero{background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 55%,#1a6cf6 100%);padding:56px 24px;text-align:center;position:relative;overflow:hidden}
.hero-in{max-width:700px;margin:0 auto;position:relative;z-index:1}
.hero h1{font-family:'DM Serif Display',serif;font-size:clamp(28px,5vw,50px);color:#fff;margin-bottom:14px;line-height:1.15}
.hero h1 em{font-style:italic;color:#93c5fd}
.hero p{color:#bfdbfe;font-size:16px;margin-bottom:8px}
.hero-stats{display:flex;justify-content:center;gap:40px;margin-top:36px}
.hero-stat strong{display:block;font-size:26px;font-weight:700;color:#fff}
.hero-stat span{font-size:11px;color:#93c5fd;text-transform:uppercase;letter-spacing:1px}
.pw{max-width:1280px;margin:0 auto;padding:0 24px}
.layout{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start;padding:32px 24px 60px;max-width:1280px;margin:0 auto}
.sticky-side{position:sticky;top:80px}
.bc{background:#fff;border-bottom:1px solid var(--border);padding:11px 0}
.bc-in{max-width:1280px;margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.bc-in a{color:var(--muted);transition:color .15s}.bc-in a:hover{color:var(--primary)}
.bc-in span{color:var(--text);font-weight:500}.bc-sep{color:#d1d5db}
.sh{padding:28px 0 18px}
.sh h2{font-family:'DM Serif Display',serif;font-size:clamp(20px,3vw,30px);margin-bottom:5px}
.sh p{color:var(--muted);font-size:14px}
.cg{display:grid;grid-template-columns:repeat(auto-fill,minmax(145px,1fr));gap:12px}
.cc{background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:18px 14px;text-align:center;transition:all .2s;text-decoration:none;color:var(--text);display:block}
.cc:hover{border-color:var(--primary);box-shadow:var(--hover);transform:translateY(-2px);color:var(--text)}
.cc-ico{font-size:28px;margin-bottom:8px;display:block}
.cc-name{font-weight:600;font-size:13px}
.cc-cnt{font-size:11px;color:var(--muted);margin-top:2px}
.calcgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.calccard{background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:16px;transition:all .2s;display:flex;align-items:flex-start;gap:12px;text-decoration:none;color:var(--text)}
.calccard:hover{border-color:var(--primary);box-shadow:var(--hover);transform:translateY(-2px);color:var(--text)}
.calccard-ico{width:42px;height:42px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.calccard-name{font-weight:600;font-size:13px;margin-bottom:3px}
.calccard-desc{font-size:12px;color:var(--muted);line-height:1.45}
.cathero{background:linear-gradient(135deg,#0f172a,#1e3a8a);padding:36px 24px;color:#fff}
.cathero-in{max-width:1280px;margin:0 auto;display:flex;align-items:center;gap:20px}
.cathero-ico{font-size:48px}
.cathero h1{font-family:'DM Serif Display',serif;font-size:clamp(22px,4vw,36px);color:#fff;margin-bottom:6px}
.cathero p{color:#bfdbfe;font-size:14px}
.cph{background:#fff;border-bottom:1px solid var(--border);padding:26px 24px}
.cph-in{max-width:1280px;margin:0 auto;display:flex;align-items:flex-start;gap:18px}
.cph-ico{width:62px;height:62px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:28px;flex-shrink:0}
.cph h1{font-family:'DM Serif Display',serif;font-size:clamp(20px,3vw,32px);margin-bottom:5px}
.cph p{font-size:14px;color:var(--muted);max-width:600px}
.widget{background:#fff;border:1px solid var(--border);border-radius:16px;padding:26px;box-shadow:var(--shadow)}
.widget h3{font-family:'DM Serif Display',serif;font-size:18px;margin-bottom:18px;padding-bottom:12px;border-bottom:2px solid var(--bg)}
.fg{margin-bottom:14px}
.fg label{display:block;font-size:11px;font-weight:700;margin-bottom:5px;color:var(--text);text-transform:uppercase;letter-spacing:.5px}
.fg input,.fg select,.fg textarea{width:100%;padding:10px 13px;border:2px solid var(--border);border-radius:var(--rs);font-size:14px;font-family:'DM Sans',sans-serif;outline:none;transition:border-color .2s;background:#fff;color:var(--text)}
.fg input:focus,.fg select:focus{border-color:var(--primary)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}
.iu{position:relative}.iu input{padding-right:48px}
.ul{position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:11px;font-weight:700;color:var(--muted);pointer-events:none}
.btn{width:100%;padding:13px;background:var(--primary);color:#fff;border:none;border-radius:var(--rs);font-size:15px;font-weight:600;cursor:pointer;font-family:'DM Sans',sans-serif;transition:background .2s,transform .1s;margin-top:4px}
.btn:hover{background:var(--primary-dark)}.btn:active{transform:scale(.98)}
.btn-o{background:transparent;border:2px solid var(--primary);color:var(--primary);margin-top:8px}.btn-o:hover{background:var(--primary-light)}
.utabs{display:flex;gap:4px;background:var(--bg);padding:4px;border-radius:50px;margin-bottom:16px;width:fit-content}
.utab{padding:6px 16px;border-radius:50px;border:none;background:transparent;font-size:12px;font-weight:600;cursor:pointer;font-family:'DM Sans',sans-serif;color:var(--muted);transition:all .2s}
.utab.on{background:#fff;color:var(--primary);box-shadow:0 1px 4px rgba(0,0,0,.1)}
.res{background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:var(--r);padding:22px;margin-top:18px;color:#fff;display:none}
.res.show{display:block;animation:fu .3s ease}
@keyframes fu{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
.rl{font-size:11px;opacity:.8;text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}
.rv{font-size:32px;font-weight:700;line-height:1.1;margin-bottom:3px}
.rsub{font-size:13px;opacity:.85}
.rg{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.rg3{grid-template-columns:1fr 1fr 1fr}
.ri{background:rgba(255,255,255,.15);border-radius:8px;padding:11px}
.ri-l{font-size:10px;opacity:.8;margin-bottom:3px;text-transform:uppercase;letter-spacing:.5px}
.ri-v{font-size:15px;font-weight:700}
.res-s{background:linear-gradient(135deg,#059669,#047857)}
.res-w{background:linear-gradient(135deg,#d97706,#b45309)}
.res-d{background:linear-gradient(135deg,#dc2626,#b91c1c)}
.rtable{width:100%;border-collapse:collapse;margin-top:14px;font-size:13px}
.rtable th{background:rgba(255,255,255,.2);padding:8px 10px;text-align:left;font-weight:600}
.rtable td{padding:7px 10px;border-bottom:1px solid rgba(255,255,255,.1)}
.rtable tr:last-child td{border:none}
.info{background:var(--primary-light);border-left:4px solid var(--primary);border-radius:0 var(--rs) var(--rs) 0;padding:13px 15px;margin:14px 0;font-size:13px;color:var(--text);line-height:1.6}
.how{background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:22px;margin-top:22px}
.how h3{font-family:'DM Serif Display',serif;font-size:17px;margin-bottom:14px}
.steps{display:flex;flex-direction:column;gap:12px}
.step{display:flex;gap:13px;align-items:flex-start}
.sn{width:27px;height:27px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0;margin-top:1px}
.st{font-size:13px;color:var(--muted);line-height:1.6}.st strong{color:var(--text)}
.formula{background:#f1f5f9;border-radius:var(--rs);padding:12px 15px;font-family:monospace;font-size:13px;color:var(--text);border:1px solid var(--border);margin:10px 0}
.faq{margin-top:24px}.faq h3{font-family:'DM Serif Display',serif;font-size:19px;margin-bottom:14px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--rs);margin-bottom:7px;overflow:hidden}
.faq-q{padding:13px 15px;cursor:pointer;font-weight:600;font-size:14px;display:flex;justify-content:space-between;align-items:center;user-select:none}
.faq-q:hover{background:var(--bg)}.faq-q .arr{transition:transform .3s;font-size:11px;color:var(--muted)}
.faq-item.open .faq-q .arr{transform:rotate(180deg)}
.faq-a{padding:0 15px;max-height:0;overflow:hidden;transition:max-height .35s ease,padding .3s;font-size:13px;color:var(--muted);line-height:1.7}
.faq-item.open .faq-a{max-height:300px;padding:0 15px 13px}
.swidget{background:#fff;border:1px solid var(--border);border-radius:var(--r);padding:18px;margin-bottom:16px}
.swidget h3{font-size:14px;font-weight:700;margin-bottom:11px;padding-bottom:9px;border-bottom:1px solid var(--border)}
.plist{list-style:none}
.plist li{border-bottom:1px solid var(--bg)}.plist li:last-child{border:none}
.plist li a{display:flex;align-items:center;gap:9px;padding:9px 0;font-size:13px;font-weight:500;color:var(--text);transition:color .15s}
.plist li a:hover{color:var(--primary)}
.pnum{width:20px;height:20px;background:var(--bg);border-radius:5px;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;color:var(--muted);flex-shrink:0}
.plist li:first-child a .pnum{background:var(--primary);color:#fff}
.rlist{list-style:none;display:flex;flex-direction:column;gap:6px}
.rlist li a{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px}
.rlist li a::before{content:'→';color:var(--primary);font-size:12px}
.rlist li a:hover{color:var(--primary)}
.dtable{width:100%;border-collapse:collapse;font-size:13px;margin-top:12px}
.dtable th{background:var(--primary-light);color:var(--primary-dark);padding:9px 13px;text-align:left;font-weight:700;font-size:11px;text-transform:uppercase;letter-spacing:.5px}
.dtable td{padding:9px 13px;border-bottom:1px solid var(--border)}
.dtable tr:hover td{background:var(--bg)}.dtable tr:last-child td{border:none}
.tbar{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:20px}
.tbtn{padding:7px 15px;border-radius:50px;border:2px solid var(--border);background:#fff;font-size:12px;font-weight:600;cursor:pointer;font-family:'DM Sans',sans-serif;color:var(--muted);transition:all .15s}
.tbtn:hover{border-color:var(--primary);color:var(--primary)}.tbtn.on{background:var(--primary);border-color:var(--primary);color:#fff}
footer{background:#0f172a;color:#94a3b8;padding:48px 24px 28px}
.fi{max-width:1280px;margin:0 auto}
.fg4{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.fb p{font-size:13px;line-height:1.7;color:#64748b;max-width:260px;margin-top:10px}
.fc h4{color:#fff;font-size:13px;font-weight:700;margin-bottom:12px;text-transform:uppercase;letter-spacing:.5px}
.fc ul{list-style:none}.fc ul li{margin-bottom:7px}
.fc ul li a{color:#64748b;text-decoration:none;font-size:13px;transition:color .15s}
.fc ul li a:hover{color:var(--primary)}
.fbot{border-top:1px solid #1e293b;padding-top:18px;display:flex;justify-content:space-between;align-items:center;font-size:12px;color:#475569}
.sci-btn{padding:12px 6px;border:1px solid #e5e7eb;border-radius:8px;background:#fff;cursor:pointer;font-size:14px;font-family:'DM Sans',sans-serif;font-weight:600;transition:all .15s;color:#1e2432}
.sci-btn:hover{background:#e8f0fe;border-color:#1a6cf6;color:#1a6cf6}
.sc-num{background:#f8f9fc}.sc-op{background:#eff6ff;color:#1a6cf6}
.sc-eq{background:#1a6cf6;color:#fff;border-color:#1a6cf6}.sc-eq:hover{background:#1450c0}
.sc-del{background:#fef3c7}.sc-clr{background:#fef2f2;color:#dc2626}
@media(max-width:1024px){.layout{grid-template-columns:1fr}.sticky-side{position:static}.fg4{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.hn{display:none}.cg{grid-template-columns:repeat(3,1fr)}.fg4{grid-template-columns:1fr 1fr}.row2,.row3{grid-template-columns:1fr}}
@media(max-width:480px){.cg{grid-template-columns:repeat(2,1fr)}.calcgrid{grid-template-columns:1fr}.fg4{grid-template-columns:1fr}.rg{grid-template-columns:1fr}}

/* Related links grid */
.wk-link{background:#f7f6f2;border:1px solid #d6d0c4;border-radius:7px;padding:9px 6px;text-align:center;text-decoration:none;color:#0d0f14;font-size:12px;font-weight:600;transition:all .15s}
.wk-link:hover{background:#0d0f14;color:#fff;border-color:#0d0f14}
.wk-link.cur{background:#1a6cf6;color:#fff;border-color:#1a6cf6}
.week-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}
.countdown{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}

/* Card component */
.card{background:#fff;border:1px solid #d6d0c4;border-radius:14px;padding:24px;margin-bottom:18px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.card h2{font-size:18px;font-weight:700;margin-bottom:16px;padding-bottom:11px;border-bottom:2px solid #f7f6f2;display:flex;align-items:center;gap:9px;letter-spacing:-.3px}
.card h2 .ico{width:30px;height:30px;background:#f7f6f2;border-radius:7px;display:flex;align-items:center;justify-content:center;font-size:15px;flex-shrink:0}
.card h3{font-size:14px;font-weight:600;margin:14px 0 8px}