/* ToolsKingMaster — site styles */
:root{
  --bg:#f7f6fb; --surface:#ffffff; --surface-2:#f1effa; --ink:#16132e; --ink-2:#4a4666; --muted:#6f6a8c;
  --line:#e3e0f0; --brand:#4b2bd6; --brand-2:#3a1fb3; --brand-soft:#ece8ff; --gold:#e3a21a; --gold-soft:#fff4dc;
  --ok:#137a4b; --ok-soft:#e3f6ec; --warn:#a15c00; --radius:14px; --radius-sm:9px;
  --shadow:0 1px 2px rgba(22,19,46,.06),0 4px 16px rgba(22,19,46,.06);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#110f22; --surface:#1a1731; --surface-2:#221e3d; --ink:#f1effa; --ink-2:#c9c4e4; --muted:#9c96bd;
  --line:#2f2a4f; --brand:#8f7bff; --brand-2:#a796ff; --brand-soft:#2a2452; --gold:#f2b84b; --gold-soft:#3a2f12;
  --ok:#5fd39b; --ok-soft:#163528; --shadow:0 1px 2px rgba(0,0,0,.3),0 4px 16px rgba(0,0,0,.25);
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font)}
a{color:var(--brand)}
a:hover{color:var(--brand-2)}
img{max-width:100%;height:auto}
.wrap{max-width:1140px;margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;background:var(--surface);padding:8px 12px;z-index:9}

/* header */
.site-head{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.head-row{display:flex;align-items:center;gap:16px;height:62px}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.12rem;letter-spacing:-.01em;white-space:nowrap}
.logo svg{flex:none}
.logo b{color:var(--brand)}
.nav{display:flex;gap:1px;margin-left:auto;align-items:center}
.nav a{color:var(--ink-2);text-decoration:none;font-size:.92rem;font-weight:600;padding:8px 9px;border-radius:8px;white-space:nowrap}
.nav a:hover,.nav a[aria-current]{background:var(--brand-soft);color:var(--brand)}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:7px 10px;color:var(--ink);font:inherit;cursor:pointer}
/* 9 nav links need ~1100px; below that, switch to the menu button */
@media (max-width:1100px){
  .menu-btn{display:block}
  .nav{display:none;position:absolute;top:62px;left:0;right:0;background:var(--surface);flex-direction:column;align-items:stretch;padding:8px 16px 14px;border-bottom:1px solid var(--line)}
  .nav.open{display:flex}
}

/* search */
.search{position:relative;max-width:560px}
.search input{width:100%;font:inherit;padding:13px 16px 13px 44px;border:1.5px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink)}
.search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-soft)}
.search svg{position:absolute;left:15px;top:50%;transform:translateY(-50%);color:var(--muted)}
.search-results{position:absolute;left:0;right:0;top:calc(100% + 6px);background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);list-style:none;margin:0;padding:6px;display:none;max-height:360px;overflow:auto;z-index:30}
.search-results.show{display:block}
.search-results a{display:block;padding:9px 12px;border-radius:8px;text-decoration:none;color:var(--ink)}
.search-results a:hover,.search-results a.active{background:var(--brand-soft)}
.search-results small{display:block;color:var(--muted);font-size:.8rem}

/* hero */
.hero{padding:56px 0 40px;background:radial-gradient(1200px 300px at 50% -60px,var(--brand-soft),transparent)}
.hero h1{font-size:clamp(2rem,4.6vw,3.1rem);line-height:1.12;letter-spacing:-.025em;margin:0 0 14px;max-width:780px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero p.lead{font-size:1.15rem;color:var(--ink-2);max-width:640px;margin:0 0 26px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:.88rem;font-weight:600;background:var(--surface);border:1px solid var(--line);border-radius:99px;padding:6px 13px;color:var(--ink-2);text-decoration:none}
.chip:hover{border-color:var(--brand);color:var(--brand)}

/* sections & cards */
section.block{padding:34px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px}
.sec-head h2{margin:0;font-size:1.5rem;letter-spacing:-.015em}
.sec-head a{font-weight:600;font-size:.95rem;text-decoration:none}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;color:var(--ink);display:block;transition:border-color .15s,transform .15s}
a.card:hover{border-color:var(--brand);transform:translateY(-2px);color:var(--ink)}
.card h3{margin:0 0 4px;font-size:1.04rem}
.card p{margin:0;color:var(--muted);font-size:.92rem;line-height:1.5}
.card .ico{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);font-size:1.15rem;margin-bottom:12px}
.cat-card{display:flex;flex-direction:column;gap:10px}
.cat-card ul{list-style:none;padding:0;margin:4px 0 0;font-size:.9rem}
.cat-card li{padding:3px 0}
.cat-card li a{color:var(--ink-2);text-decoration:none}
.cat-card li a:hover{color:var(--brand)}
.cat-card .more{font-weight:700;font-size:.9rem;text-decoration:none;margin-top:auto}

/* breadcrumbs */
.crumbs{font-size:.86rem;color:var(--muted);padding:16px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0}
.crumbs li:not(:last-child)::after{content:"›";margin-left:6px;color:var(--line)}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--brand)}

/* tool page */
.page-title{padding:10px 0 4px}
.page-title h1{font-size:clamp(1.7rem,3.6vw,2.4rem);letter-spacing:-.02em;line-height:1.15;margin:8px 0 8px}
.page-title p{color:var(--ink-2);font-size:1.07rem;margin:0;max-width:760px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;padding:22px 0 40px}
@media (max-width:960px){.layout{grid-template-columns:minmax(0,1fr)}}
.tool{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.fields{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
.field label{display:block;font-weight:600;font-size:.9rem;margin-bottom:6px;color:var(--ink-2)}
.field small{display:block;color:var(--muted);font-size:.8rem;margin-top:4px}
input[type=number],input[type=text],input[type=date],input[type=time],input[type=datetime-local],select,textarea{width:100%;font:inherit;color:var(--ink);background:var(--bg);border:1.5px solid var(--line);border-radius:var(--radius-sm);padding:10px 12px}
textarea{min-height:190px;resize:vertical;line-height:1.55}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.mono{font-family:var(--mono);font-size:.92rem}
.btns{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.btn{font:inherit;font-weight:700;font-size:.95rem;border:0;border-radius:10px;padding:10px 18px;cursor:pointer;background:var(--brand);color:#fff}
.btn:hover{background:var(--brand-2)}
.btn.ghost{background:var(--surface-2);color:var(--ink)}
.btn.ghost:hover{background:var(--brand-soft);color:var(--brand)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.results{margin-top:18px;display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(190px,1fr))}
.result{background:var(--surface-2);border-radius:var(--radius-sm);padding:12px 14px}
.result span{display:block;font-size:.82rem;color:var(--muted);font-weight:600}
.result strong{display:block;font-size:1.25rem;letter-spacing:-.01em;word-break:break-word}
.result.main{background:var(--brand);color:#fff;grid-column:1/-1}
.result.main span{color:rgba(255,255,255,.82)}
.result.main strong{font-size:1.9rem}
.note{font-size:.85rem;color:var(--muted);margin:12px 0 0}
.err{color:#c0392b;font-weight:600;font-size:.92rem;margin-top:10px}
.drop{border:2px dashed var(--line);border-radius:var(--radius);padding:28px;text-align:center;color:var(--muted);cursor:pointer;background:var(--bg)}
.drop:hover,.drop.over{border-color:var(--brand);color:var(--brand)}
.drop input{display:none}
.file-list{list-style:none;padding:0;margin:12px 0 0;font-size:.92rem}
.file-list li{display:flex;justify-content:space-between;gap:8px;padding:7px 10px;background:var(--surface-2);border-radius:8px;margin-bottom:6px}
.file-list button{background:none;border:0;color:var(--muted);cursor:pointer;font:inherit}
.preview{margin-top:14px;text-align:center}
.preview img,.preview canvas{max-height:360px;border-radius:10px;border:1px solid var(--line)}
.stats{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));margin-top:14px}
.stat{background:var(--surface-2);border-radius:10px;padding:10px 12px;text-align:center}
.stat strong{display:block;font-size:1.4rem}
.stat span{font-size:.78rem;color:var(--muted);font-weight:600}
table.data{width:100%;border-collapse:collapse;font-size:.93rem;margin:12px 0}
table.data th,table.data td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:left}
table.data th{background:var(--surface-2);font-weight:700}
.tbl-wrap{overflow-x:auto}

/* article */
.article{margin-top:26px}
.article h2{font-size:1.38rem;letter-spacing:-.015em;margin:30px 0 10px}
.article h3{font-size:1.08rem;margin:20px 0 6px}
.article p,.article li{color:var(--ink-2)}
.article ol,.article ul{padding-left:22px}
.article li{margin:4px 0}
.formula{font-family:var(--mono);background:var(--surface-2);border-left:4px solid var(--gold);padding:12px 14px;border-radius:0 10px 10px 0;overflow-x:auto;color:var(--ink)}
.callout{background:var(--gold-soft);border-radius:var(--radius-sm);padding:12px 16px;color:var(--ink);font-size:.95rem}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 16px;margin-bottom:8px}
.faq summary{font-weight:700;cursor:pointer;color:var(--ink)}
.faq details p{margin:8px 0 2px}

/* sidebar */
.side{display:flex;flex-direction:column;gap:18px}
.side-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.side-box h2{font-size:.98rem;margin:0 0 10px}
.side-box ul{list-style:none;margin:0;padding:0}
.side-box li a{display:block;padding:6px 0;text-decoration:none;color:var(--ink-2);font-size:.93rem;border-bottom:1px solid var(--line)}
.side-box li:last-child a{border-bottom:0}
.side-box li a:hover{color:var(--brand)}
@media (min-width:961px){.side .sticky{position:sticky;top:80px}}

/* ads: only rendered when an AdSense client id is configured */
.ad{margin:22px 0;min-height:100px;text-align:center}
.ad-label{display:block;font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}

/* prose pages */
.prose{max-width:780px;padding:10px 0 50px}
.prose h1{font-size:2.1rem;letter-spacing:-.02em;margin:14px 0 6px}
.prose h2{font-size:1.3rem;margin:28px 0 8px}
.prose p,.prose li{color:var(--ink-2)}
.updated{color:var(--muted);font-size:.9rem}

/* footer */
.site-foot{background:var(--surface);border-top:1px solid var(--line);margin-top:40px;padding:38px 0 26px;font-size:.92rem}
.foot-grid{display:grid;gap:24px;grid-template-columns:2fr repeat(3,1fr)}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot-grid h2{font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 10px}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{padding:3px 0}
.foot-grid a{color:var(--ink-2);text-decoration:none}
.foot-grid a:hover{color:var(--brand)}
.foot-grid p{color:var(--muted);margin:10px 0 0;max-width:340px}
.copy{border-top:1px solid var(--line);margin-top:28px;padding-top:16px;color:var(--muted);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--bg);padding:9px 18px;border-radius:99px;font-weight:600;font-size:.9rem;opacity:0;transition:.2s;pointer-events:none;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}