:root{
  --bg:#f4f6fb; --panel:#ffffff; --ink:#1b2340; --muted:#566080; --line:#dde2ef;
  --accent:#3447c9; --accent-soft:#e6e9fb; --mark:#e8a33d;
  --ad:#eef0f7; --ad-line:#b9c0d8;
  --ic-k:#5b6173; --ic-s:#8fc4e8; --ic-o:#eab16d;
  --tag:#000000;
  --side:190px; --rail:190px; --hh:84px; --fs:18pt; --font:Arial,Helvetica,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#10142a; --panel:#181d38; --ink:#e8ebf8; --muted:#a3abcb; --line:#2a3156;
    --accent:#8e9bff; --accent-soft:#252c57; --ad:#141932; --ad-line:#3a4270;
    --ic-k:#a9b0cc; --ic-s:#6fa8d6; --ic-o:#d9a05c;
    --tag:#e8ebf8;
  }
}
:root[data-theme="dark"]{
  --bg:#10142a; --panel:#181d38; --ink:#e8ebf8; --muted:#a3abcb; --line:#2a3156;
  --accent:#8e9bff; --accent-soft:#252c57; --ad:#141932; --ad-line:#3a4270;
    --ic-k:#a9b0cc; --ic-s:#6fa8d6; --ic-o:#d9a05c;
    --tag:#e8ebf8;
}
*{box-sizing:border-box}
button,input,select,textarea,a.btn,.abtn{font-family:var(--font)}
html,body{margin:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font:var(--fs)/1.6 var(--font);overflow-x:hidden;padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right);padding-bottom:env(safe-area-inset-bottom)}
img,svg,iframe{max-width:100%}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

header{display:flex;align-items:center;gap:10px 18px;flex-wrap:wrap;min-height:104px;padding:10px 28px;background:var(--panel);border-bottom:1px solid var(--line)}
.brand{display:flex;flex-direction:column;align-items:center;gap:3px;text-decoration:none;color:var(--ink)}
.logo-img{height:7.5rem;width:auto;object-fit:contain;flex:none;display:block;border-radius:50%}
#logoImg{height:7.5rem;width:auto}
:root[data-theme="dark"] #logoImg{background:#fff;border-radius:50%}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) #logoImg{background:#fff;border-radius:50%}}
.tagline{flex:1 1 auto;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:4px 0;padding:0 8px;font:700 14pt var(--font);color:var(--tag);text-align:center}
.tagline i{font-style:normal;margin:0 .9em}
@media (min-width:1440px){.tagline{font-size:var(--fs)}}
.logo-text{font:700 3.6rem/1 var(--font);letter-spacing:-.03em}
.logo-text b{color:var(--mark)}
:root{--wm-a:#002f74;--wm-b:#fe8401}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--wm-a:#a9c0ff}}
:root[data-theme="dark"]{--wm-a:#a9c0ff}
.brand-text{display:flex;flex-direction:column;align-items:center;line-height:1.1;text-align:center}
.wm{font:800 2.2rem/1.1 var(--font);letter-spacing:-.02em;white-space:nowrap}
.wm-a{color:var(--wm-a)} .wm-b{color:var(--wm-b)}
.wm-tag{font:600 .98rem/1.2 var(--font);letter-spacing:.02em;color:var(--muted);white-space:nowrap}
@media (max-width:860px){.wm{font-size:1.7rem}.wm-tag{font-size:.84rem}}
@media (max-width:620px){.brand{gap:2px}.wm{font-size:1.45rem}.wm-tag{font-size:.78rem;letter-spacing:0;white-space:normal;max-width:9.6rem;text-wrap:balance}}
.tagline{margin-top:2px;text-wrap:balance}
header .grow{flex:1}
.topnav{display:flex;order:4;flex-basis:100%;gap:4px;justify-content:safe center;overflow-x:auto;white-space:nowrap}
.topnav a{font-size:var(--fs);padding:5px 16px;border-radius:8px;color:var(--ink);text-decoration:none;font-weight:600;border-bottom:3px solid transparent}
.topnav a:hover{background:var(--accent-soft)}
.topnav a.active{color:var(--accent);border-bottom-color:var(--mark)}
.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
header a.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--panel);font-weight:600}
@media (max-width:1280px){
  .actions{order:2;margin-left:auto}
  .tagline{order:3;flex-basis:100%}
}
header button,header a.btn{font:inherit;font-size:var(--fs);padding:9px 20px;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:8px;cursor:pointer;text-decoration:none}

.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:24px;max-width:none;width:100%;margin:0 auto;padding:24px clamp(12px,3vw,48px)}

aside.left{align-self:start;position:sticky;top:16px;max-height:calc(100vh - 32px);overflow:auto}

.ad{background:var(--ad);border:1px dashed var(--ad-line);border-radius:8px;display:flex;align-items:center;justify-content:center;text-align:center;color:var(--muted);font-size:var(--fs);min-height:90px;margin:18px 0;overflow:hidden}
.ad-left{min-height:600px}
.ad-right{min-height:600px;position:sticky;top:16px}
.ad-middle{min-height:130px}
.ad-bottom{min-height:100px;max-width:1640px;margin:0 auto 18px}

main{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:34px clamp(18px,3vw,56px);min-width:0}
main h1{font:700 2.6rem/1.15 var(--font);margin:0 0 8px;letter-spacing:-.01em}
main h1:empty,main .lead:empty{display:none}
main .lead{color:var(--muted);font-size:var(--fs);margin:0 0 24px;max-width:110ch}
#content{max-width:none;font-size:var(--fs)}
.group-title{font:700 1.4rem var(--font);margin:26px 0 4px}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));gap:14px;margin:12px 0}
.tiles a{display:flex;align-items:center;gap:14px;padding:12px 16px;border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink);font-weight:600;font-size:var(--fs);line-height:1.25;background:var(--panel)}
.ico{width:56px;height:56px;flex:none}
.tiles a:hover{border-color:var(--accent)}
.note{border-left:5px solid var(--mark);background:var(--accent-soft);padding:16px 20px;border-radius:0 8px 8px 0;font-size:var(--fs)}
code,pre,kbd{font-family:var(--font)}
code{background:var(--accent-soft);padding:2px 7px;border-radius:4px;font-size:.9em}

.admin input[type=password],.admin input[type=email],.admin input[type=file]{font:inherit;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--ink);min-width:0;width:100%;max-width:100%}
.authbox{max-width:560px;width:100%}
.authbox .note{margin:0 0 16px}
.authbox input{width:100%}
.usage{padding:12px 18px;border-radius:8px;background:var(--accent-soft);margin-bottom:18px;font-size:var(--fs)}
.usage.full{border-left:5px solid var(--mark)}
.bar{height:20px;border-radius:10px;background:var(--accent-soft);overflow:hidden;margin:8px 0}
.bar span{display:block;height:100%;background:var(--mark)}
.abtn{font:inherit;font-size:var(--fs);padding:9px 18px;border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:8px;cursor:pointer;margin:4px 6px 4px 0;text-decoration:none;display:inline-block}
.abtn.alt{background:var(--panel);color:var(--accent)}
.admin h2{font:700 1.4rem var(--font);margin:26px 0 6px}
.admin code{word-break:break-all}

footer{background:var(--panel);border-top:1px solid var(--line);padding:22px 20px;text-align:center;color:var(--muted);font-size:var(--fs)}
footer a{margin:0 10px}

@media (max-width:1280px){
  .layout{grid-template-columns:minmax(0,1fr)}
  aside.right{display:none}
}
@media (max-width:860px){
  :root{--hh:84px}
  .logo-img{height:6rem;width:auto}
  #logoImg{height:6rem;width:auto}
  header{padding:8px 14px;gap:8px 10px;min-height:84px}
  header button,header a.btn{padding:6px 14px}
  .topnav a{padding:6px 12px}
  .layout{grid-template-columns:1fr;padding:12px}
  aside.left{display:none}
  main{padding:22px 18px}
  main h1{font-size:2.1rem}
}
@media (max-width:620px){
  #themeBtn{display:none}
  #logoImg{height:5rem;width:auto}
  .brand{gap:10px}
}
@media (prefers-reduced-motion:reduce){aside.left{transition:none}}

.divider{display:flex;align-items:center;gap:12px;margin:18px 0 14px;color:var(--muted);font-size:.8em}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}
.social{display:grid;gap:10px;margin:0 0 6px}
.sbtn{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;min-height:48px;padding:10px 16px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--ink);font:600 .85em var(--font);cursor:pointer}
.sbtn:hover{border-color:var(--accent);background:var(--accent-soft)}
.sbtn svg{width:22px;height:22px;flex:none}
.sbtn[disabled]{opacity:.6;cursor:wait}
/* ---------- phones and tablets ---------- */
@media (max-width:860px){ :root{--fs:15pt} .ico{width:44px;height:44px} .group-title{font-size:1.2rem} }
@media (max-width:620px){
  :root{--fs:13pt}
  html,body{max-width:100vw}
  header{padding:8px 12px;padding-top:calc(8px + env(safe-area-inset-top))}
  .brand{flex:none}
  #logoImg,.logo-img{height:4.8rem}
  .actions{gap:6px}
  header button,header a.btn{min-height:40px;padding:6px 12px}
  .topnav{gap:2px;margin:0 -12px;padding:0 12px 4px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .topnav::-webkit-scrollbar{display:none}
  .topnav a{padding:8px 12px;min-height:40px}
  .tagline{font-size:11pt}
  .tagline i{margin:0 .35em}
  .layout{padding:10px;gap:12px}
  main{padding:18px 14px;border-radius:8px}
  main h1{font-size:1.6rem}
  .tiles{grid-template-columns:1fr 1fr;gap:10px}
  .tiles a{flex-direction:column;justify-content:center;text-align:center;gap:6px;padding:12px 8px;min-height:104px;font-size:.78em}
  .ico{width:44px;height:44px}
  .ad-middle,.ad-bottom{min-height:60px}
  .ad-bottom{margin:0 10px 12px}
  footer{padding:18px 12px calc(18px + env(safe-area-inset-bottom));line-height:2}
  footer a{display:inline-block;margin:0 8px}
  .abtn{width:100%;text-align:center;margin:4px 0}
}
@media (max-width:380px){
  :root{--fs:12pt}
  #logoImg,.logo-img{height:4.4rem}
  .tiles{grid-template-columns:1fr}
  .tiles a{flex-direction:row;text-align:left;min-height:64px;padding:10px 12px;font-size:.9em}
  .tagline{font-size:10pt}
}
@media (max-height:480px) and (orientation:landscape){ :root{--fs:12pt} header{min-height:0} .ad-left,.ad-right{min-height:300px} }
.hero-cta{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 14px}
.hero-cta .abtn{margin:0}
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,270px),1fr));gap:16px;margin:16px 0}
.plan{border:1px solid var(--line);border-radius:10px;padding:18px;background:var(--panel);display:flex;flex-direction:column}
.plan ul{padding-left:1.2em;margin:8px 0 16px;flex:1}
.plan .price{font-size:1.15em;margin:2px 0 8px}
.plan .group-title{font-size:1.9rem;margin:0 0 2px}
.plan .abtn{align-self:flex-start}
.faq{border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin:8px 0;background:var(--panel)}
.faq summary{cursor:pointer;font-weight:600;display:flex;align-items:center;gap:12px;min-height:44px}
.faq summary::after{content:"+";margin-left:auto;font-size:1.3em;line-height:1}
.faq[open] summary::after{content:"\2013"}
.faq summary::-webkit-details-marker{display:none}
.faq p{margin:8px 0 2px}
#authDlg{border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--ink);padding:22px;width:min(440px,calc(100vw - 24px));font-size:13pt}
#authDlg::backdrop{background:rgba(10,14,40,.55)}
#authDlg h2{font:700 1.3rem var(--font);margin:0 0 8px}
#authDlg label{display:block;margin:10px 0;font-size:.85em}
#authDlg input{width:100%;font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--ink)}
#authDlg .tabs{display:flex;gap:6px;margin-bottom:10px}
#authDlg .tabs button{flex:1;font:inherit;padding:8px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--ink);cursor:pointer}
#authDlg .tabs [aria-selected=true]{background:var(--accent);border-color:var(--accent);color:#fff}
#authDlg .abtn{width:100%;margin:8px 0 0;text-align:center}
#authDlg .nt{font-size:.8em;color:var(--muted)}
#authDlg .err{color:#c0392b}#authDlg .ok{color:#1e8449}
.abtn[disabled]{opacity:.6;cursor:not-allowed}
.acct{position:relative}
.acct summary{list-style:none;cursor:pointer;padding:9px 16px;border:1px solid var(--line);border-radius:8px;background:var(--panel);max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:var(--fs)}
.acct summary::-webkit-details-marker{display:none}
.acct-pop{position:absolute;right:0;top:calc(100% + 6px);z-index:30;min-width:220px;padding:10px 14px;background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.18)}
.acct-pop a{display:block;padding:6px 0;font-size:var(--fs)}
.acct-pop p{margin:0 0 4px;color:var(--muted);font-size:.8em}


/* ===== IBM-style slim top bar, tools menu, search, announcement strip ===== */
html{scroll-padding-top:calc(var(--hh) + 8px)}
aside.left{top:calc(var(--hh) + 12px);max-height:calc(100vh - var(--hh) - 24px)}
.ad-right{top:calc(var(--hh) + 12px)}
header.site-top{display:block;position:sticky;top:0;z-index:60;min-height:0;padding:env(safe-area-inset-top) 0 0;gap:0;background:var(--panel);border-bottom:1px solid var(--line)}
header.site-top [hidden]{display:none!important}
header.site-top .hbar{display:flex;align-items:center;gap:14px;min-height:84px;padding:6px clamp(12px,3vw,48px);max-width:none;margin:0 auto}
header.site-top .brand{flex-direction:row;align-items:center;gap:10px;flex:none}
header.site-top #logoImg,header.site-top .logo-img{height:4rem;width:auto}
header.site-top .brand-text{align-items:flex-start;text-align:left}
header.site-top .wm{font-size:1.55rem}
header.site-top .wm-tag{font-size:.74rem}
.vsep{width:1px;height:36px;background:var(--line);margin:0 8px;flex:none}
header.site-top .topnav{order:0;flex:1 1 auto;display:flex;align-items:center;gap:2px;overflow:visible;white-space:nowrap;justify-content:flex-start;margin:0;padding:0}
header.site-top .topnav a{font-size:1.2rem;font-weight:600;padding:14px 18px;border-radius:0;border-bottom:3px solid transparent;color:var(--ink);text-decoration:none;display:inline-flex;align-items:center;min-height:0}
header.site-top .topnav a:hover{background:var(--accent-soft)}
header.site-top .topnav a.active{color:var(--accent);border-bottom-color:var(--mark)}
.nav-dd{position:relative;display:flex;align-items:center}
header.site-top .dd-btn{background:none;border:0;border-radius:0;padding:12px 10px 12px 0;color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;min-height:0}
header.site-top .dd-btn svg{transition:transform .15s}
header.site-top .dd-btn[aria-expanded="true"] svg{transform:rotate(180deg)}
header.site-top .dd-panel{position:fixed;left:0;right:0;top:var(--hh);max-height:calc(100vh - var(--hh) - 16px);overflow:auto;background:var(--panel);border-bottom:1px solid var(--line);box-shadow:0 16px 32px rgba(0,0,0,.16);padding:22px 32px 28px;display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:22px 28px;z-index:70;white-space:normal}
.dd-col h3{font:700 .78rem var(--font);text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 8px}
header.site-top .dd-panel a{display:block;padding:6px 0;font-size:1rem;font-weight:500;border:0;color:var(--ink);text-decoration:none}
header.site-top .dd-panel a:hover{color:var(--accent);text-decoration:underline;background:none}
header.site-top .dd-panel a.sub{padding-left:14px;font-size:.95rem;color:var(--muted)}
header.site-top .actions{margin-left:auto;order:0;display:flex;align-items:center;gap:8px;flex:none}
header.site-top .ibtn{width:44px;height:44px;min-height:0;padding:0;display:inline-grid;place-items:center;border:0;background:transparent;border-radius:8px;color:var(--ink);cursor:pointer}
header.site-top .ibtn:hover,header.site-top .ibtn[aria-expanded="true"]{background:var(--accent-soft)}
header.site-top .hamb{display:none}
header.site-top .actions .btn{font-size:.98rem;padding:9px 18px;min-height:0}
header.site-top .acct summary{font-size:.95rem;padding:9px 14px;max-width:200px}
header.site-top .acct-pop a{font-size:.98rem}
header.site-top .topnav .mob-only{display:none}
.searchbar{border-top:1px solid var(--line);background:var(--panel);padding:12px 24px 16px}
.searchbar input{display:block;width:100%;max-width:680px;margin:0 auto;font:inherit;font-size:1.05rem;padding:12px 14px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink)}
#searchRes{max-width:680px;margin:10px auto 0;display:flex;flex-wrap:wrap;gap:8px}
#searchRes a{padding:8px 14px;border:1px solid var(--line);border-radius:999px;color:var(--ink);text-decoration:none;font-size:.98rem;background:var(--panel)}
#searchRes a:hover,#searchRes a:focus-visible{border-color:var(--accent);color:var(--accent)}
#searchRes p{margin:0;color:var(--muted)}
.promo{display:flex;align-items:center;justify-content:center;gap:14px;background:#d9ecff;border-bottom:1px solid #b6d8f7;padding:10px 20px;text-align:center}
.promo .tagline{--tg-a:#002f74;--tg-b:#e06a00;flex:0 1 auto;order:0;display:block;text-align:center;text-wrap:balance;font-family:var(--font);font-weight:400;font-size:clamp(1rem,1.3vw,1.25rem);line-height:1.25;letter-spacing:-.01em;color:var(--tg-a);background:none;border:0;padding:0;margin:0}
.promo-go{flex:none;display:inline-grid;place-items:center;width:40px;height:40px;border-radius:50%;color:#0b3a9a;text-decoration:none}
.promo-go:hover{background:#bfdcfb}
.promo .tagline .tw{display:inline-block;margin:0 .12em;color:var(--tg-a);opacity:0;transform:translateY(.55em);
  animation:tw-in .7s cubic-bezier(.2,.8,.2,1) forwards;animation-delay:calc(var(--i)*.09s)}
@supports ((-webkit-background-clip:text) or (background-clip:text)){
  .promo .tagline .tw{color:transparent;-webkit-background-clip:text;background-clip:text;
    background-image:linear-gradient(100deg,var(--tg-a) 0%,var(--tg-a) 38%,var(--tg-b) 50%,var(--tg-a) 62%,var(--tg-a) 100%);background-size:300% 100%;background-position:100% 0;
    animation:tw-in .7s cubic-bezier(.2,.8,.2,1) forwards,tw-shine 4.5s ease-in-out infinite;
    animation-delay:calc(var(--i)*.09s),calc(var(--i)*.3s + 1s)}
}
@keyframes tw-in{to{opacity:1;transform:none}}
@keyframes tw-shine{0%{background-position:100% 0}60%,100%{background-position:0 0}}
@media (prefers-reduced-motion:reduce){.promo .tagline .tw{animation:none!important;opacity:1;transform:none}}
@media (max-width:1320px){
  header.site-top .hamb{display:inline-grid}
  header.site-top .vsep{display:none}
  header.site-top .topnav{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;background:var(--panel);border-bottom:1px solid var(--line);box-shadow:0 16px 28px rgba(0,0,0,.16);padding:6px 14px 12px;max-height:calc(100vh - var(--hh));overflow:auto}
  header.site-top .topnav.open{display:flex}
  header.site-top .topnav>a,header.site-top .nav-dd>a{padding:14px 8px;border-bottom:1px solid var(--line)}
  .nav-dd{flex-wrap:wrap;align-items:stretch}
  header.site-top .nav-dd>a{flex:1 1 auto}
  header.site-top .dd-btn{padding:0 16px;border-bottom:1px solid var(--line)}
  header.site-top .dd-panel{position:static;width:100%;box-shadow:none;border:0;padding:6px 8px 10px;grid-template-columns:1fr;max-height:none;overflow:visible}
  header.site-top .brand{margin-right:auto}
}
@media (max-width:860px){ .promo .tagline{font-size:1.1rem} }
@media (max-width:620px){
  header.site-top .hbar{padding:6px 12px;gap:8px;min-height:68px}
  header.site-top #logoImg,header.site-top .logo-img{height:3rem}
  header.site-top .wm{font-size:1.2rem}
  header.site-top .wm-tag{display:none}
  header.site-top #loginBtn{display:none}
  header.site-top .topnav .mob-only{display:flex}
  header.site-top .navbtn{font:600 1.02rem var(--font);text-align:left;background:none;border:0;border-bottom:1px solid var(--line);padding:14px 8px;color:var(--ink);cursor:pointer}
  header.site-top .acct summary{max-width:120px}
  .promo{padding:10px 12px;gap:6px}
  .promo .tagline{font-size:1rem}
  .promo-go{width:36px;height:36px}
  .searchbar{padding:10px 12px 14px}
}
@media (max-width:420px){ header.site-top #signupBtn{display:none} .promo .tagline{font-size:.92rem} }
.guide-link{margin:0 0 10px;font-size:1rem}.guide-link a{color:var(--accent);font-weight:600;text-decoration:none}.guide-link a:hover{text-decoration:underline}
.learn-h{font:700 1.5rem var(--font);margin:30px 0 10px}
.learn{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:14px;margin-bottom:10px}
.learn a{display:block;border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:var(--panel);color:var(--ink);text-decoration:none}
.learn a:hover{border-color:var(--accent)}.learn b{display:block;color:var(--accent);font-size:1.15rem;margin-bottom:4px}.learn span{color:var(--muted);font-size:1rem}
@media (min-width:1321px) and (max-width:1560px){header.site-top .topnav a{font-size:1.05rem;padding:12px 11px}header.site-top .hbar{gap:10px}header.site-top .actions .btn{padding:9px 14px}}