/* CalcNest — single stylesheet, no external requests */
:root{
  --bg:#f6f8fb; --surface:#ffffff; --surface2:#eef2f7; --text:#0f172a; --muted:#5b6b82;
  --border:#e3e9f1; --primary:#0d9488; --primary-2:#0f766e; --primary-soft:#e6f7f5;
  --accent:#f59e0b; --danger:#dc2626; --ok:#16a34a;
  --shadow:0 1px 2px rgba(15,23,42,.05),0 8px 24px -12px rgba(15,23,42,.12);
  --radius:14px; --maxw:1080px;
}
[data-theme="dark"]{
  --bg:#0b1220; --surface:#101a2e; --surface2:#16233c; --text:#e6edf7; --muted:#93a4bd;
  --border:#1f2d47; --primary:#2dd4bf; --primary-2:#14b8a6; --primary-soft:#0e2b33;
  --accent:#fbbf24; --danger:#f87171; --ok:#4ade80;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -12px rgba(0,0,0,.5);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme]){
    --bg:#0b1220; --surface:#101a2e; --surface2:#16233c; --text:#e6edf7; --muted:#93a4bd;
    --border:#1f2d47; --primary:#2dd4bf; --primary-2:#14b8a6; --primary-soft:#0e2b33;
    --accent:#fbbf24; --danger:#f87171; --ok:#4ade80;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -12px rgba(0,0,0,.5);
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:16px/1.65 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
img,svg{vertical-align:middle}
a{color:var(--primary-2);text-decoration:none}
a:hover{text-decoration:underline}
[data-theme="dark"] a{color:var(--primary)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--surface);padding:8px 14px;border-radius:8px;z-index:100}
.skip-link:focus{left:12px;top:12px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--border);backdrop-filter:saturate(140%) blur(6px)}
.header-inner{display:flex;align-items:center;gap:18px;height:60px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.15rem;color:var(--text) !important;letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand svg{flex:0 0 auto}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:2px}
.main-nav a{padding:8px 11px;border-radius:9px;color:var(--text);font-size:.925rem;font-weight:500;white-space:nowrap}
.main-nav a:hover{background:var(--surface2);text-decoration:none}
.main-nav a[aria-current="page"]{color:var(--primary-2);background:var(--primary-soft)}
[data-theme="dark"] .main-nav a[aria-current="page"]{color:var(--primary)}
.theme-toggle{margin-left:6px;border:1px solid var(--border);background:var(--surface);color:var(--text);width:38px;height:38px;border-radius:10px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.theme-toggle:hover{background:var(--surface2)}
.theme-toggle .moon{display:none}
[data-theme="dark"] .theme-toggle .sun{display:none}
[data-theme="dark"] .theme-toggle .moon{display:block}
.nav-toggle{display:none;margin-left:auto;border:1px solid var(--border);background:var(--surface);color:var(--text);width:38px;height:38px;border-radius:10px;cursor:pointer;align-items:center;justify-content:center}
@media (max-width:820px){
  .nav-toggle{display:inline-flex}
  .main-nav{display:none;position:absolute;top:60px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);flex-direction:column;align-items:stretch;padding:10px 16px 14px;gap:4px;box-shadow:var(--shadow)}
  .main-nav.open{display:flex}
  .main-nav a{padding:11px 12px}
  .theme-toggle{margin-left:0;width:100%;height:42px}
}

/* Hero */
.hero{background:linear-gradient(135deg,var(--primary-2),#0369a1 90%);color:#fff;padding:52px 0 58px;text-align:center}
.hero h1{margin:0 0 10px;font-size:clamp(1.7rem,4.2vw,2.6rem);letter-spacing:-.02em;line-height:1.2}
.hero p{margin:0 auto;max-width:640px;color:#e0f2f1;font-size:1.06rem}
.search-wrap{max-width:560px;margin:26px auto 0;position:relative}
.search-wrap input{width:100%;padding:14px 18px 14px 46px;font-size:1rem;border-radius:999px;border:2px solid transparent;outline:none;background:#fff;color:#0f172a;box-shadow:0 10px 30px -10px rgba(0,0,0,.35)}
.search-wrap input:focus{border-color:var(--accent)}
.search-wrap .search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:#64748b;pointer-events:none}
.search-results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);max-height:320px;overflow:auto;text-align:left;z-index:40}
.search-results a{display:block;padding:11px 16px;color:var(--text);border-bottom:1px solid var(--border);font-size:.95rem}
.search-results a:last-child{border-bottom:0}
.search-results a:hover,.search-results a.active{background:var(--surface2);text-decoration:none}
.search-results .cat-tag{color:var(--muted);font-size:.8rem;margin-left:8px}
.search-results:empty{display:none}

/* Sections & cards */
main{padding:34px 0 10px}
.section{margin:0 0 40px}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:0 0 16px}
.section-head h2{margin:0;font-size:1.35rem;letter-spacing:-.01em}
.section-head a{font-size:.9rem;white-space:nowrap}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;padding:0;margin:0;list-style:none}
.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 16px 14px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px;transition:transform .12s ease,border-color .12s ease}
.tool-card:hover{transform:translateY(-2px);border-color:var(--primary)}
.tool-card a{color:var(--text);font-weight:700;font-size:1.0rem}
.tool-card a::after{content:"";position:absolute;inset:0}
.tool-card{position:relative}
.tool-card p{margin:0;color:var(--muted);font-size:.875rem;line-height:1.5}
.tool-card .emoji{font-size:1.35rem;line-height:1}
.badge{display:inline-block;background:var(--primary-soft);color:var(--primary-2);border-radius:999px;padding:2px 10px;font-size:.75rem;font-weight:600}
[data-theme="dark"] .badge{color:var(--primary)}

/* Breadcrumbs */
.breadcrumbs{margin:2px 0 14px;font-size:.85rem;color:var(--muted)}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0}
.breadcrumbs li+li::before{content:"›";margin-right:6px;color:var(--muted)}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs a:hover{color:var(--primary-2)}

/* Tool page */
.page-title{margin:4px 0 8px;font-size:clamp(1.5rem,3.4vw,2.1rem);letter-spacing:-.02em;line-height:1.25}
.lead{color:var(--muted);max-width:70ch;margin:0 0 22px;font-size:1.02rem}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.calc{padding:22px;margin:0 0 30px}
.calc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px 16px;margin-bottom:16px}
.calc-grid .full{grid-column:1/-1}
.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:5px;color:var(--text)}
.field .hint{font-weight:400;color:var(--muted)}
.field input[type=number],.field input[type=text],.field input[type=date],.field input[type=time],.field select,.field textarea{
  width:100%;padding:10px 12px;font-size:1rem;color:var(--text);background:var(--bg);
  border:1.5px solid var(--border);border-radius:10px;outline:none;font-family:inherit;
}
.field textarea{min-height:92px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary)}
.unit-row{display:flex;gap:8px}
.unit-row input{flex:1}
.unit-row select{width:auto;min-width:86px}
.seg{display:inline-flex;background:var(--surface2);border:1px solid var(--border);border-radius:10px;padding:3px;gap:3px;flex-wrap:wrap}
.seg button{border:0;background:transparent;color:var(--muted);padding:7px 14px;border-radius:8px;font-size:.9rem;font-weight:600;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--text);box-shadow:var(--shadow)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--primary-2);color:#fff;border:0;border-radius:10px;padding:12px 22px;font-size:1rem;font-weight:700;cursor:pointer;transition:filter .12s}
.btn:hover{filter:brightness(1.08)}
.btn.secondary{background:var(--surface2);color:var(--text);border:1px solid var(--border)}
.btn.small{padding:8px 14px;font-size:.85rem;font-weight:600}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.result{margin-top:18px;border-top:2px dashed var(--border);padding-top:16px}
.result[hidden]{display:none}
.result-main{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;color:var(--primary-2)}
[data-theme="dark"] .result-main{color:var(--primary)}
.result-sub{color:var(--muted);font-size:.95rem;margin-top:2px}
.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:12px}
.result-item{background:var(--surface2);border-radius:10px;padding:10px 14px}
.result-item .k{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.result-item .v{font-size:1.15rem;font-weight:700}
.error-msg{color:var(--danger);font-weight:600;margin-top:12px;font-size:.92rem}
.copy-ok{color:var(--ok);font-size:.85rem;font-weight:600}

/* Content */
.content{max-width:76ch}
.content h2{margin:34px 0 12px;font-size:1.4rem;letter-spacing:-.01em}
.content h3{margin:24px 0 10px;font-size:1.12rem}
.content p{margin:0 0 14px}
.content ul,.content ol{margin:0 0 14px;padding-left:24px}
.content li{margin-bottom:6px}
.formula{background:var(--surface2);border-left:4px solid var(--primary);border-radius:8px;padding:12px 16px;margin:14px 0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.95rem;overflow-x:auto}
table{border-collapse:collapse;width:100%;margin:14px 0 20px;font-size:.93rem;background:var(--surface);border-radius:10px;overflow:hidden;box-shadow:var(--shadow)}
caption{caption-side:top;text-align:left;font-weight:700;padding:8px 2px;font-size:.95rem}
th,td{padding:9px 13px;border-bottom:1px solid var(--border);text-align:left}
th{background:var(--surface2);font-weight:700}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:var(--surface2)}
.table-scroll{overflow-x:auto;margin:14px 0 20px}
.table-scroll table{margin:0;min-width:420px}
.note{background:var(--primary-soft);border:1px solid var(--primary);border-radius:10px;padding:12px 16px;margin:16px 0;font-size:.93rem}
.disclaimer{color:var(--muted);font-size:.85rem;border-top:1px solid var(--border);margin-top:30px;padding-top:14px}

/* FAQ */
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:10px;box-shadow:var(--shadow)}
.faq summary{cursor:pointer;padding:14px 18px;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:10px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.3rem;color:var(--muted);font-weight:400;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq .faq-a{padding:0 18px 16px;color:var(--muted)}
.faq .faq-a p{margin:0 0 10px}

/* Related */
.related{margin:36px 0 8px}
.related h2{font-size:1.25rem;margin:0 0 14px}
.related ul{list-style:none;display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:0}
.related a{display:inline-block;background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:8px 16px;font-size:.9rem;font-weight:600;color:var(--text);box-shadow:var(--shadow)}
.related a:hover{border-color:var(--primary);color:var(--primary-2);text-decoration:none}

/* Footer */
.site-footer{margin-top:44px;background:var(--surface);border-top:1px solid var(--border);padding:36px 0 26px;font-size:.9rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:24px}
.footer-grid h3{margin:0 0 10px;font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin-bottom:7px}
.footer-grid a{color:var(--text)}
.footer-grid a:hover{color:var(--primary-2)}
.footer-bottom{margin-top:26px;padding-top:16px;border-top:1px solid var(--border);color:var(--muted);display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;font-size:.85rem}

/* Category page hero */
.cat-hero{padding:36px 0 6px}
.cat-hero h1{margin:0 0 8px;font-size:clamp(1.6rem,3.6vw,2.2rem);letter-spacing:-.02em}
.cat-hero p{color:var(--muted);max-width:70ch;margin:0}

/* Misc */
.center{text-align:center}
.mt-0{margin-top:0}
.big-404{font-size:5rem;font-weight:800;color:var(--primary-2);margin:30px 0 0;letter-spacing:-.04em}
.password-output{display:flex;gap:10px;align-items:center}
.password-output input{flex:1;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1.05rem}
.strength{height:8px;border-radius:99px;background:var(--surface2);overflow:hidden;margin-top:10px}
.strength b{display:block;height:100%;width:0;border-radius:99px;background:var(--danger);transition:width .2s}
.range-row{display:flex;align-items:center;gap:12px}
.range-row input[type=range]{flex:1;accent-color:var(--primary-2)}
.checks{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px}
.checks label{display:flex;gap:8px;align-items:center;font-size:.92rem;font-weight:500;background:var(--surface2);border-radius:9px;padding:9px 12px;cursor:pointer}
.checks input{accent-color:var(--primary-2);width:16px;height:16px}
.gpa-rows .gpa-row{display:grid;grid-template-columns:1fr 110px 130px 42px;gap:10px;margin-bottom:10px}
@media (max-width:560px){.gpa-rows .gpa-row{grid-template-columns:1fr 80px 100px 38px;gap:6px}}
.icon-btn{border:1px solid var(--border);background:var(--surface2);color:var(--muted);border-radius:9px;cursor:pointer;font-size:1.05rem;line-height:1}
.icon-btn:hover{color:var(--danger);border-color:var(--danger)}
.promo-band{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:18px 22px;margin:8px 0 36px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
.promo-band p{margin:0;color:var(--muted)}
@media print{.site-header,.site-footer,.related,.faq,.breadcrumbs{display:none}}

/* ===== TypeNest theme override (violet/fuchsia) ===== */
:root{
  --primary:#8b5cf6; --primary-2:#7c3aed; --primary-soft:#f3e8ff; --accent:#ec4899;
}
[data-theme="dark"]{
  --bg:#0d0a1a; --surface:#161129; --surface2:#1f1838; --border:#2c2350;
  --primary:#a78bfa; --primary-2:#8b5cf6; --primary-soft:#251b45; --accent:#f472b6;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme]){
    --bg:#0d0a1a; --surface:#161129; --surface2:#1f1838; --border:#2c2350;
    --primary:#a78bfa; --primary-2:#8b5cf6; --primary-soft:#251b45; --accent:#f472b6;
  }
}
.hero{background:linear-gradient(135deg,#7c3aed,#db2777 90%)}
.hero p{color:#fbe8ff}
/* output rows */
.out-list{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.support-note{background:var(--surface2);border:1px solid var(--border);border-radius:12px;color:var(--muted);font-size:.92rem;line-height:1.6;padding:12px 16px}
.support-note strong{color:var(--text)}
.out-row{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px 16px;box-shadow:var(--shadow)}
.out-row .style-name{flex:0 0 128px;font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-weight:650}
html[lang^="zh"] .out-row .style-name{text-transform:none;letter-spacing:0;font-size:.82rem}
.out-row .out-text{flex:1;font-size:1.18rem;word-break:break-word;line-height:1.5}
.out-row .btn{padding:8px 14px;font-size:.85rem;flex:0 0 auto}
.out-row.copied{border-color:var(--ok)}
.bigin{width:100%;padding:16px 18px;font-size:1.25rem;border-radius:14px;border:2px solid var(--border);background:var(--surface);color:var(--text);outline:none;font-family:inherit}
.bigin:focus{border-color:var(--primary)}
.zalgo-controls{display:flex;align-items:center;gap:14px;margin-top:14px;flex-wrap:wrap}
.zalgo-controls label{font-size:.9rem;font-weight:600}
.zalgo-controls input[type=range]{width:180px;accent-color:var(--primary-2)}
@media (max-width:560px){.out-row{flex-wrap:wrap}.out-row .style-name{flex-basis:100%}}