:root{
  --bg:#f6f8fc;--surface:#fff;--text:#172033;--muted:#667085;--line:#e4e8f0;
  --brand:#0b57d0;--brand-2:#174ea6;--brand-soft:#eaf2ff;--ok:#137333;
  --danger:#b42318;--shadow:0 16px 50px rgba(20,35,70,.09);--radius:20px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.65;text-rendering:optimizeLegibility}
a{color:var(--brand)}
code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace}
.container{width:min(1160px,calc(100% - 32px));margin-inline:auto}
.skip-link{position:absolute;left:-9999px;top:12px;background:#000;color:#fff;padding:10px 14px;z-index:9999}.skip-link:focus{left:12px}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);border-bottom:1px solid rgba(228,232,240,.9);backdrop-filter:saturate(180%) blur(14px)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:11px;color:var(--text);text-decoration:none}.brand img{border-radius:11px;object-fit:contain}.brand span{display:flex;flex-direction:column;line-height:1.2}.brand strong{font-size:15px}.brand small{font-size:12px;color:var(--muted);margin-top:3px}
nav{display:flex;gap:22px;align-items:center}nav a{text-decoration:none;color:#344054;font-size:14px;font-weight:650}nav a:hover{color:var(--brand)}
.hero{padding:74px 0 44px;background:linear-gradient(180deg,#fff 0%,#f6f8fc 100%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(280px,.55fr);gap:54px;align-items:center}
.eyebrow,.section-kicker{display:inline-block;margin:0 0 10px;text-transform:uppercase;letter-spacing:.08em;font-weight:800;font-size:12px;color:var(--brand)}
h1{font-size:clamp(37px,5vw,62px);line-height:1.05;letter-spacing:-.045em;margin:0;max-width:850px}.hero-copy{font-size:18px;color:#475467;max-width:790px;margin:22px 0 0}
.trust-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.trust-row span{font-size:13px;color:#344054;background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 11px}
.hero-card{background:#0f1d38;color:#fff;border-radius:24px;padding:28px;box-shadow:0 20px 60px rgba(15,29,56,.22);transform:rotate(1deg)}.hero-card code{display:block;background:rgba(255,255,255,.09);padding:13px;border-radius:12px;font-size:14px;overflow-wrap:anywhere}.mini-label{font-size:12px;color:#b8c7e6;margin-bottom:8px}.mini-arrow{text-align:center;font-size:24px;padding:8px}.mini-output{background:#fff;color:#172033;padding:14px;border-radius:12px;font-weight:800;text-align:center}
.tool-section{padding:24px 0 64px}.tool-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:24px}.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px}.tool-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:24px}.tool-heading h2{font-size:30px;letter-spacing:-.025em;margin:0}.status-pill{font-size:12px;font-weight:800;color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:7px 10px;white-space:nowrap}
label,.label-like{display:block;font-size:14px;font-weight:750;color:#344054;margin-bottom:8px}.input-row{display:grid;grid-template-columns:1fr auto;gap:10px}input,select{width:100%;border:1px solid #cfd6e3;background:#fff;color:var(--text);border-radius:12px;padding:14px 15px;font-size:16px;outline:none;transition:.16s border,.16s box-shadow}input:focus,select:focus{border-color:#5b8def;box-shadow:0 0 0 4px rgba(11,87,208,.11)}
.primary-btn,.secondary-btn,.ghost-btn{border:0;border-radius:12px;font-weight:800;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;transition:.15s transform,.15s background,.15s border-color}.primary-btn{background:var(--brand);color:#fff;padding:0 21px;min-height:52px}.primary-btn:hover{background:var(--brand-2)}.primary-btn:active,.secondary-btn:active,.ghost-btn:active{transform:translateY(1px)}.primary-btn[disabled]{opacity:.62;cursor:wait}
.field-help{font-size:13px;color:var(--muted);margin:8px 0 0}.field-help code{font-size:12px}.form-grid{display:grid;grid-template-columns:minmax(220px,.6fr) 1fr;gap:18px;margin-top:22px}.sample-wrap{align-self:end}.sample-doi{border:1px solid var(--line);background:#f8fafc;color:#344054;border-radius:999px;padding:9px 12px;margin-right:6px;cursor:pointer;font-weight:700}.sample-doi:hover{border-color:#9bbaf0;color:var(--brand)}
.message{margin-top:20px;border-radius:12px;padding:13px 15px;background:#fff4ed;color:#9a3412;border:1px solid #fed7aa}.message.success{background:#ecfdf3;color:#067647;border-color:#abefc6}.result{margin-top:28px;border-top:1px solid var(--line);padding-top:26px}.result-topline,.intext-box{display:flex;justify-content:space-between;gap:16px;align-items:center}.result-label{display:block;color:var(--muted);font-size:12px;font-weight:750;margin-bottom:3px}.citation-output{margin:15px 0 18px;padding:20px;border:1px solid #d9e2f2;background:#fbfdff;border-radius:14px;font-size:17px;overflow-wrap:anywhere}.citation-output i,.citation-output em{font-style:italic}.ghost-btn{background:#fff;border:1px solid var(--line);padding:9px 12px;color:#344054}.ghost-btn:hover{border-color:#a6b8d7;background:#f8fafc}.ghost-btn.small{padding:7px 10px;font-size:12px}.intext-box{background:#f7f9fc;border-radius:13px;padding:15px 16px}.intext-box code{font-size:15px;color:#1f3a68}.metadata-details{margin-top:18px;border:1px solid var(--line);border-radius:13px;overflow:hidden}.metadata-details summary{cursor:pointer;padding:14px 16px;font-weight:800;background:#fbfcfe}.metadata-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;margin:0;border-top:1px solid var(--line)}.metadata-grid>div{padding:13px 16px;border-bottom:1px solid var(--line)}.metadata-grid>div:nth-child(odd){border-right:1px solid var(--line)}.metadata-grid dt{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:800}.metadata-grid dd{margin:4px 0 0;font-size:14px;overflow-wrap:anywhere}.export-row{display:flex;gap:9px;flex-wrap:wrap;margin-top:18px}.secondary-btn{background:#fff;border:1px solid #cfd6e3;color:#344054;padding:10px 13px;font-size:13px}.secondary-btn:hover{border-color:#8cabdf;color:var(--brand)}.result-note{color:var(--muted);font-size:12px;margin:14px 0 0}
.sidebar-ad-wrap{min-width:0}.ad-zone{margin:20px auto;text-align:center;min-height:90px}.ad-sidebar{position:sticky;top:92px}
.content-section,.faq-section{padding:64px 0}.content-section{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.prose{max-width:900px}.prose h2{font-size:30px;line-height:1.25;letter-spacing:-.025em;margin:52px 0 15px}.prose h2:first-child{margin-top:0}.prose p{color:#3f4b5f;font-size:16px;margin:0 0 18px}.prose strong{color:#263247}.style-table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px;margin:26px 0}.style-table{width:100%;border-collapse:collapse;min-width:680px}.style-table th,.style-table td{padding:13px 15px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}.style-table th{background:#f8fafc;color:#344054}.style-table tbody tr:last-child td{border-bottom:0}
.faq-section details{background:#fff;border:1px solid var(--line);border-radius:14px;margin:10px 0;padding:0 17px}.faq-section summary{font-weight:800;cursor:pointer;padding:16px 0}.faq-section details p{padding-bottom:4px}
.site-footer{background:#0e1730;color:#c8d2e5;padding:34px 0}.footer-inner{display:flex;justify-content:space-between;gap:30px;align-items:flex-start}.footer-inner p{margin:5px 0 0;max-width:620px;font-size:13px}.footer-inner a{color:#d8e7ff}
@media (min-width:1024px){.tool-layout:has(.sidebar-ad-wrap){grid-template-columns:minmax(0,1fr) 300px}}
@media (max-width:850px){.hero{padding-top:48px}.hero-grid{grid-template-columns:1fr}.hero-card{display:none}.header-inner nav a:not(:first-child){display:none}.tool-card{padding:22px}.form-grid{grid-template-columns:1fr}.footer-inner{flex-direction:column}.metadata-grid{grid-template-columns:1fr}.metadata-grid>div:nth-child(odd){border-right:0}}
@media (max-width:600px){.container{width:min(100% - 22px,1160px)}.site-header{position:static}.header-inner{min-height:64px}.brand img{width:38px;height:38px}.brand strong{font-size:13px}.brand small{font-size:11px}nav{display:none}.hero{padding:40px 0 25px}h1{font-size:38px}.hero-copy{font-size:16px}.input-row{grid-template-columns:1fr}.primary-btn{min-height:48px}.tool-card{padding:17px;border-radius:16px}.tool-heading h2{font-size:24px}.status-pill{display:none}.metadata-grid{display:block}.prose h2{font-size:25px}.content-section,.faq-section{padding:46px 0}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* VSH Citation 1.1 — manual entry */
.hero-mode{background:rgba(255,255,255,.09);padding:13px;border-radius:12px;font-size:14px;font-weight:800;text-align:center}
.mode-tabs{display:flex;gap:8px;padding:6px;background:#f2f5fa;border:1px solid var(--line);border-radius:14px;margin:0 0 24px;width:max-content;max-width:100%}
.mode-tab{appearance:none;border:0;background:transparent;color:#526075;padding:10px 15px;border-radius:10px;font-weight:800;cursor:pointer;font-size:14px}
.mode-tab.active{background:#fff;color:var(--brand);box-shadow:0 2px 10px rgba(16,24,40,.08)}
.mode-tab:focus-visible{outline:3px solid rgba(11,87,208,.2);outline-offset:2px}
.mode-panel[hidden],.conditional-field[hidden]{display:none!important}
.manual-section{margin-top:24px;padding-top:23px;border-top:1px solid var(--line)}
.manual-section:first-of-type{margin-top:0;padding-top:0;border-top:0}
.manual-section h3{margin:0 0 16px;font-size:17px;letter-spacing:-.01em}
.manual-grid{display:grid;gap:16px}.manual-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.manual-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.manual-grid>div{min-width:0}.manual-grid input,.manual-grid select{min-height:50px}
.date-grid{margin-top:18px}
.required{color:var(--danger)}.optional{font-size:12px;font-weight:600;color:var(--muted)}
.author-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin:20px 0 10px}.author-head label{margin-bottom:2px}.author-head .field-help{margin:0}
.authors-list{display:grid;gap:9px}.author-row{display:grid;grid-template-columns:minmax(0,.75fr) minmax(0,1fr) 42px;gap:8px;align-items:center}.author-row input{min-width:0}
.icon-btn{width:42px;height:48px;border:1px solid var(--line);border-radius:11px;background:#fff;color:#667085;font-size:24px;line-height:1;cursor:pointer}.icon-btn:hover{border-color:#f0a9a4;color:var(--danger);background:#fff7f6}
.or-divider{display:flex;align-items:center;gap:12px;color:#98a2b3;font-size:12px;margin:16px 0}.or-divider:before,.or-divider:after{content:"";height:1px;background:var(--line);flex:1}
.manual-submit-row{display:flex;gap:10px;align-items:center;margin-top:24px}.manual-submit-row .primary-btn{padding:0 24px}.manual-submit-row .ghost-btn{min-height:52px;padding-inline:17px}
#manual-form>label{margin-top:16px}#manual-form>label:first-child{margin-top:0}
@media (max-width:760px){.manual-grid.two,.manual-grid.three{grid-template-columns:1fr}.author-head{align-items:flex-start;flex-direction:column;gap:10px}.author-row{grid-template-columns:1fr 1fr 40px}.mode-tabs{width:100%}.mode-tab{flex:1;padding-inline:9px}}
@media (max-width:520px){.author-row{grid-template-columns:1fr 40px}.author-row .author-given{grid-column:1}.author-row .icon-btn{grid-column:2;grid-row:1 / span 2;height:100%}.manual-submit-row{flex-direction:column}.manual-submit-row>*{width:100%}}