:root{--bg:#f5f7fb;--card:#fff;--ink:#0f1b33;--mut:#5b6679;--line:#e2e7f0;--pri:#2447e0;--pri2:#1a36b8;--acc:#0e9f6e;--soft:#eaeffd;
box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0b1220;--card:#131c2f;--ink:#e8edf7;--mut:#9aa6bd;--line:#243049;--pri:#6c8cff;--pri2:#8ba3ff;--acc:#34d399;--soft:#1a2748}}
:root[data-theme="dark"]{--bg:#0b1220;--card:#131c2f;--ink:#e8edf7;--mut:#9aa6bd;--line:#243049;--pri:#6c8cff;--pri2:#8ba3ff;--acc:#34d399;--soft:#1a2748}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 "Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:inherit;text-decoration:none}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
header{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--card);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;gap:16px;height:64px}
.logo{font-weight:800;font-size:22px;letter-spacing:-.5px;display:inline-flex;align-items:center;gap:0;transition:transform .2s cubic-bezier(.34,1.56,.64,1);transform-origin:left center}
.logo:hover{transform:scale(1.06)}
.logo b{color:var(--pri);position:relative;display:inline-block;animation:logo-fade-in .6s ease both}
.logo b::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.55) 50%,transparent 100%);background-size:200% 100%;animation:logo-shimmer 3.2s ease-in-out 1s infinite;border-radius:3px;pointer-events:none}
@media(prefers-color-scheme:dark){.logo b::after{background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.2) 50%,transparent 100%);background-size:200% 100%}}
:root[data-theme="dark"] .logo b::after{background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.2) 50%,transparent 100%);background-size:200% 100%}
@keyframes logo-shimmer{0%,100%{background-position:200% 0;opacity:0}20%{opacity:1}50%{background-position:-100% 0;opacity:1}70%{opacity:0}}
@keyframes logo-fade-in{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.sb{flex:1;max-width:460px;margin:0 auto}
input,select,button{font:inherit;color:inherit}
.sb input,.hero input{width:100%;height:44px;border:1px solid var(--line);border-radius:10px;padding:0 14px;background:var(--bg)}
nav{display:flex;gap:4px;align-items:center}
nav a,.ib{padding:8px 12px;border-radius:8px;font-weight:600;font-size:14px;color:var(--mut);cursor:pointer;border:0;background:none}
nav a:hover,.ib:hover{background:var(--soft);color:var(--pri)}
:focus-visible{outline:3px solid var(--pri);outline-offset:2px}
.hero{padding:56px 0 36px}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.1;letter-spacing:-1.5px;margin:0 0 12px;max-width:16ch}
.hero p{color:var(--mut);margin:0 0 22px;font-size:18px}
.hero .box{display:flex;gap:10px;max-width:560px}
.hero input{height:52px;font-size:16px;background:var(--card)}
.btn{height:44px;padding:0 20px;border-radius:10px;border:0;background:var(--pri);color:#fff;font-weight:700;cursor:pointer}
.btn:hover{background:var(--pri2)}
.btn.o{background:none;border:1px solid var(--line);color:var(--ink)}
.btn.o:hover{background:var(--soft)}
.stats{display:flex;gap:28px;flex-wrap:wrap;margin-top:26px;color:var(--mut);font-size:14px}.stats b{color:var(--ink);font-size:20px;margin-right:6px}
h2{font-size:22px;letter-spacing:-.4px;margin:40px 0 16px;display:flex;justify-content:space-between;align-items:baseline}
h2 a{font-size:14px;color:var(--pri);font-weight:600}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.tile{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;display:flex;gap:12px;align-items:flex-start}
.tile:hover{border-color:var(--pri)}
.ic{flex:none;width:42px;height:42px;border-radius:10px;background:var(--soft);color:var(--pri);display:grid;place-items:center;font-weight:800;font-size:19px}
.tile h3{margin:0;font-size:16px}.tile p{margin:2px 0 0;font-size:13px;color:var(--mut)}
.feat{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin-top:16px}
.feat div{padding:18px;border-radius:12px;background:var(--soft)}.feat b{display:block;margin-bottom:4px}.feat span{color:var(--mut);font-size:14px}
.crumb{font-size:14px;color:var(--mut);padding:22px 0 6px}.crumb a:hover{color:var(--pri)}
.page{display:grid;gap:24px;grid-template-columns:minmax(0,1fr) 300px;align-items:start}
@media(max-width:860px){.page{grid-template-columns:1fr}nav .hide{display:none}.hd{gap:8px}}
.panel{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.panel h1{margin:0 0 4px;font-size:28px;letter-spacing:-.8px}.panel>p{margin:0 0 18px;color:var(--mut)}
.fld{margin-bottom:14px}.fld label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.fld .in{display:flex;border:1px solid var(--line);border-radius:10px;background:var(--bg);overflow:hidden}
.fld .in:focus-within{border-color:var(--pri);box-shadow:0 0 0 3px var(--soft)}
.fld input,.fld select{flex:1;min-width:0;height:44px;border:0;background:none;padding:0 12px;outline:0}
.fld select option{color:#000}
.fld .u{padding:0 12px;display:grid;place-items:center;color:var(--mut);font-size:14px;background:var(--soft)}
.row{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
.res{margin-top:20px;border-radius:12px;border:1px solid var(--line);overflow:hidden}
.main{padding:18px 20px;background:var(--soft)}.main span{font-size:14px;color:var(--mut)}
.main strong{display:block;font-size:clamp(28px,6vw,38px);color:var(--acc);letter-spacing:-1px;overflow-wrap:anywhere}
.det{display:flex;justify-content:space-between;gap:12px;padding:11px 20px;border-top:1px solid var(--line);font-size:15px}.det span{color:var(--mut)}
.err{color:#d6336c;font-size:14px;margin-top:12px}
.side .panel{margin-bottom:16px;padding:18px}.side h3{margin:0 0 10px;font-size:15px}
.side a{display:block;padding:7px 0;font-size:14px;color:var(--mut);border-bottom:1px solid var(--line)}.side a:last-child{border:0}.side a:hover{color:var(--pri)}
.info{margin-top:24px}.info h2{margin-top:0;font-size:18px}.info p{color:var(--mut);margin:6px 0}
details{border-bottom:1px solid var(--line);padding:10px 0}summary{cursor:pointer;font-weight:600}details p{margin:8px 0 0}
footer{margin-top:64px;border-top:1px solid var(--line);background:var(--card);padding:30px 0;color:var(--mut);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}footer a{margin-right:16px}footer a:hover{color:var(--pri)}
.empty{padding:40px;text-align:center;color:var(--mut)}
.bar{border-top:1px solid var(--line);position:relative;z-index:10}
.bar nav{display:flex;align-items:center;gap:4px;padding:4px 0}
.bar a{flex:none}
.bar a[aria-current]{color:var(--pri);background:var(--soft)}
.nav-drop{position:relative}
.nav-drop-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:8px;font-weight:600;font-size:14px;color:var(--mut);cursor:pointer;border:0;background:none;font-family:inherit}
.nav-drop-btn:hover,.nav-drop-btn.active,.nav-drop.open .nav-drop-btn{background:var(--soft);color:var(--pri)}
.nav-caret{transition:transform .2s;flex:none}
.nav-drop:hover .nav-caret,.nav-drop.open .nav-caret{transform:rotate(180deg)}
.nav-drop-menu{position:absolute;top:calc(100% + 4px);left:0;width:440px;max-width:calc(100vw - 32px);max-height:calc(85vh - 70px);overflow-y:auto;background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 32px -4px rgba(0,0,0,.15);padding:10px;z-index:50;display:none}
.nav-drop:hover .nav-drop-menu,.nav-drop.open .nav-drop-menu{display:block}
.nav-drop-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px}
@media(max-width:520px){.nav-drop-grid{grid-template-columns:1fr}.nav-drop-menu{width:calc(100vw - 40px);left:-20px}}
.nav-drop-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:8px;transition:background .15s;color:var(--ink)}
.nav-drop-item:hover{background:var(--soft);color:var(--pri)}
.nav-drop-item.active{background:var(--soft);color:var(--pri)}
.nav-drop-ic{width:28px;height:28px;border-radius:7px;background:var(--soft);color:var(--pri);display:grid;place-items:center;font-weight:800;font-size:13px;flex:none}
.nav-drop-text{display:flex;flex-direction:column;line-height:1.2}
.nav-drop-text strong{font-size:13px;font-weight:600}
.nav-drop-text small{font-size:11px;color:var(--mut)}
.nav-drop-foot{border-top:1px solid var(--line);margin-top:6px;padding-top:6px;text-align:center}
.nav-drop-foot a{font-size:13px;font-weight:700;color:var(--pri);display:block;padding:6px}
.nav-drop-foot a:hover{text-decoration:underline}
.fc{display:grid;gap:24px;grid-template-columns:2fr 1fr 1fr 1fr;width:100%}
@media(max-width:700px){.fc{grid-template-columns:1fr 1fr}.fc>div:first-child{grid-column:1/-1}}
footer h3{margin:0 0 8px;font-size:14px;color:var(--ink)}footer .fc a{display:block;margin:0 0 6px}footer p{margin:6px 0 0;max-width:34ch}
.cr{width:100%;border-top:1px solid var(--line);padding-top:16px}
.doc{margin-top:12px;max-width:820px}.doc h2{font-size:18px;margin:24px 0 6px;display:block}.doc p,.doc li{color:var(--mut)}.doc a{color:var(--pri);text-decoration:underline}
@media print{.bar,header,footer,.side,.row,.crumb{display:none}.page{display:block}}
@media(prefers-reduced-motion:no-preference){.tile{transition:border-color .15s}.res{animation:pop .25s}@keyframes pop{from{opacity:.4;transform:translateY(6px)}}}
.cat-hero{position:relative;border-radius:18px;padding:34px 28px;margin:12px 0 24px;background:var(--card);border:1px solid var(--line);overflow:hidden;box-shadow:0 4px 20px -2px rgba(0,0,0,.03)}
.cat-hero-glow{position:absolute;top:-60px;right:-60px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,var(--cat-c) 0%,transparent 70%);opacity:.15;pointer-events:none}
.cat-hero-content{position:relative;z-index:1}
.cat-badge{display:inline-flex;align-items:center;gap:8px;padding:5px 14px;border-radius:999px;font-size:13px;font-weight:700;color:var(--cat-c);background:var(--soft);margin-bottom:14px;border:1px solid var(--line)}
.cat-badge .cat-ic{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--card);color:var(--cat-c);font-weight:800;font-size:12px}
.cat-hero h1{font-size:clamp(24px,4vw,34px);line-height:1.2;letter-spacing:-.8px;margin:0 0 10px;color:var(--ink)}
.cat-hero p.cat-desc{font-size:16px;line-height:1.6;color:var(--mut);margin:0 0 20px;max-width:72ch}
.cat-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--mut)}
.cat-meta span{display:inline-flex;align-items:center;gap:6px}
.cat-meta b{color:var(--ink);font-weight:700}
.cat-tags{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;font-size:12px;color:var(--mut)}
.cat-tag{display:inline-block;padding:3px 10px;border-radius:6px;background:var(--soft);color:var(--ink);font-weight:600}
.cat-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin:0 0 16px}
.cat-count-label{font-size:14px;color:var(--mut)}.cat-count-label b{color:var(--ink)}
.cat-filter{min-width:240px;max-width:340px;height:40px;border:1px solid var(--line);border-radius:10px;padding:0 14px;background:var(--card);font:inherit;color:inherit}
.cat-filter:focus{outline:3px solid var(--pri);outline-offset:2px}
.jump-wrap{margin:24px 0 32px}
.jump-title{font-size:12px;font-weight:700;color:var(--mut);text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px}
.jump-nav{display:flex;gap:8px;flex-wrap:wrap}
.jump-pill{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;background:var(--card);border:1px solid var(--line);color:var(--ink);transition:all .15s}
.jump-pill:hover{border-color:var(--pri);background:var(--soft);color:var(--pri)}
.jump-pill span{color:var(--c, var(--pri));font-weight:800}
.jump-pill em{font-style:normal;color:var(--mut);font-size:11px}
.cat-sec{margin:44px 0 32px;scroll-margin-top:80px}
.cat-sec-hd{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.cat-sec-title{display:flex;align-items:center;gap:12px}
.cat-sec-ic{display:grid;place-items:center;width:42px;height:42px;border-radius:10px;background:var(--soft);font-weight:800;font-size:18px}
.cat-sec-hd h2{margin:0;font-size:22px;letter-spacing:-.4px}
.cat-sec-hd p{margin:4px 0 0;font-size:14px;color:var(--mut)}
.cat-sec-more{font-size:13px;font-weight:700;color:var(--pri);white-space:nowrap}
.cat-sec-more:hover{text-decoration:underline}
.home-doc{margin-top:16px;display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.home-doc h3{margin:0 0 8px;font-size:18px}
.home-doc p{margin:0 0 10px;font-size:14px;color:var(--mut);line-height:1.6}
.home-faq details{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px 18px;margin-bottom:10px}
.home-faq summary{cursor:pointer;font-weight:700;font-size:15px;color:var(--ink)}
.home-faq details p{margin:10px 0 0;color:var(--mut);font-size:14px;line-height:1.6}

/* ─── Guide Hero ─── */
.guide-hero{background:linear-gradient(135deg,var(--soft) 0%,var(--card) 100%);border:1px solid var(--line);border-radius:18px;padding:44px 36px 36px;margin:12px 0 28px;position:relative;overflow:hidden}
.guide-hero::before{content:"";position:absolute;top:-80px;right:-80px;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,var(--pri) 0%,transparent 70%);opacity:.07;pointer-events:none}
.guide-hero-content{position:relative;z-index:1}
.guide-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:999px;font-size:13px;font-weight:700;color:var(--pri);background:var(--soft);border:1px solid var(--line);margin-bottom:16px}
.guide-hero h1{font-size:clamp(26px,4.5vw,42px);line-height:1.15;letter-spacing:-1px;margin:0 0 12px;color:var(--ink)}
.guide-hero p{font-size:17px;color:var(--mut);margin:0 0 22px;max-width:68ch;line-height:1.6}
.guide-hero-stats{display:flex;gap:24px;flex-wrap:wrap;font-size:13px;color:var(--mut)}.guide-hero-stats b{color:var(--ink);font-size:18px;margin-right:4px}

/* ─── Guide Grid (list page) ─── */
.guide-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));margin:16px 0 40px}
.guide-card{display:flex;align-items:flex-start;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;text-decoration:none;color:inherit;transition:border-color .18s,box-shadow .18s;position:relative}
.guide-card:hover{border-color:var(--gc,var(--pri));box-shadow:0 6px 24px -4px rgba(0,0,0,.1)}
.guide-card-ic{flex:none;width:48px;height:48px;border-radius:12px;background:var(--soft);color:var(--gc,var(--pri));display:grid;place-items:center;font-size:22px;font-weight:800;border:1px solid var(--line)}
.guide-card-body{flex:1;min-width:0}
.guide-card-cat{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--gc,var(--pri));margin-bottom:5px}
.guide-card h3{margin:0 0 5px;font-size:15px;line-height:1.3;font-weight:700}
.guide-card p{margin:0 0 10px;font-size:13px;color:var(--mut);line-height:1.5}
.guide-card-meta{display:flex;gap:8px;flex-wrap:wrap}
.guide-card-meta span{font-size:11px;font-weight:600;padding:2px 8px;border-radius:5px;background:var(--soft);color:var(--mut)}
.guide-card-arr{flex:none;font-size:18px;color:var(--gc,var(--pri));opacity:.6;transition:transform .18s;align-self:center}
.guide-card:hover .guide-card-arr{transform:translateX(4px);opacity:1}

/* ─── Category Guide Hero ─── */
.cat-guide-hero{position:relative;border-radius:18px;padding:36px 30px;margin:12px 0 24px;background:var(--card);border:1px solid var(--line);overflow:hidden;box-shadow:0 4px 20px -2px rgba(0,0,0,.04)}
.cat-guide-glow{position:absolute;top:-70px;right:-70px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,var(--cat-c) 0%,transparent 70%);opacity:.14;pointer-events:none}
.cat-guide-content{position:relative;z-index:1}
.cat-guide-hero h1{font-size:clamp(22px,3.5vw,32px);line-height:1.2;letter-spacing:-.7px;margin:10px 0 8px;color:var(--ink)}
.cat-guide-hero p{font-size:16px;color:var(--mut);margin:0 0 18px;max-width:70ch;line-height:1.6}

/* ─── Guide Layout (detail page) ─── */
.guide-layout{display:grid;gap:24px;grid-template-columns:minmax(0,1fr) 280px;align-items:start;margin-top:16px}
@media(max-width:900px){.guide-layout{grid-template-columns:1fr}}
.guide-main{display:flex;flex-direction:column;gap:18px}

/* ─── Guide Boxes ─── */
.guide-box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.guide-box-title{font-size:14px;font-weight:800;text-transform:uppercase;letter-spacing:.5px;color:var(--pri);margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.guide-box p{margin:0 0 12px;color:var(--mut);line-height:1.65;font-size:15px}
.guide-box p:last-child{margin-bottom:0}

/* Formula */
.guide-formula{background:var(--soft);border:1px solid var(--line);border-radius:10px;padding:16px 20px;font-family:monospace;font-size:15px;color:var(--ink);line-height:1.7;margin:10px 0 12px;overflow-x:auto;word-break:break-word}
.guide-formula-desc{font-size:14px;color:var(--mut);line-height:1.6;margin:0}

/* Inputs / Steps / Tips */
.guide-inputs,.guide-steps,.guide-tips{margin:10px 0 14px;padding-left:22px;color:var(--mut);font-size:14px;line-height:1.7}
.guide-inputs li,.guide-steps li,.guide-tips li{margin-bottom:6px}
.guide-steps{list-style:decimal}

/* Result box */
.guide-result{background:var(--soft);border-left:4px solid var(--acc);border-radius:0 10px 10px 0;padding:14px 18px;font-size:14px;color:var(--ink);line-height:1.6;margin-top:12px}

/* FAQ inside guide */
.guide-faq{border-bottom:1px solid var(--line);padding:10px 0}
.guide-faq:last-child{border-bottom:0}
.guide-faq summary{cursor:pointer;font-weight:600;font-size:15px;color:var(--ink)}
.guide-faq p{margin:8px 0 0;color:var(--mut);font-size:14px;line-height:1.6}

/* ─── Guide Sidebar ─── */
.guide-side .panel{margin-bottom:16px;padding:18px}
.guide-side h3{margin:0 0 10px;font-size:15px}
.guide-side a{display:block;padding:7px 0;font-size:14px;color:var(--mut);border-bottom:1px solid var(--line)}
.guide-side a:last-child{border:0}
.guide-side a:hover{color:var(--pri)}

/* ─── Category guide CTA button ─── */
.guide-cat-cta{margin:24px 0 8px}
.guide-cat-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;background:var(--soft);border:1px solid var(--line);color:var(--pri);font-weight:700;font-size:14px;transition:background .15s,border-color .15s}
.guide-cat-btn:hover{background:var(--pri);color:#fff;border-color:var(--pri)}