/* Errata - the site around the practice app. Same paper-and-ink palette. */
:root{
  --paper:#E7EAE2; --sheet:#F7F8F4; --sheet-2:#EFF1EA;
  --ink:#1B2A3A; --ink-2:#556A80; --ink-3:#8496A6;
  --rule:#CDD4C7; --rule-2:#DFE4DA;
  --red:#B3322A; --red-bg:#F7E4E1; --green:#2C6A4E; --green-bg:#DFEDE3;
  --ochre:#A0731B; --ochre-bg:#F5EBD5; --violet:#5B4B8A; --violet-bg:#E7E3F1;
  --focus:#2F5D8C;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --sans:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  --radius:14px;
}
html[data-theme="dark"]{
  --paper:#12161C; --sheet:#1A2027; --sheet-2:#222933;
  --ink:#E4E8EC; --ink-2:#9FAEBC; --ink-3:#71818F;
  --rule:#333C47; --rule-2:#2A323B;
  --red:#E8756A; --red-bg:#3A2320; --green:#69C295; --green-bg:#1E3329;
  --ochre:#D9A94A; --ochre-bg:#352B17; --violet:#A594DC; --violet-bg:#272248;
  --focus:#7FB2E5;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--paper);color:var(--ink);font:16px/1.55 var(--sans);-webkit-font-smoothing:antialiased;
  min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
a{color:var(--focus)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:3px}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:-.01em;line-height:1.15;margin:0}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
.wrap.narrow{max-width:760px}
.wrap.wide{max-width:1240px}
.muted{color:var(--ink-2)}
.small{font-size:12.5px}
.mono{font-family:var(--mono);font-size:13px}
.center{text-align:center}
.nowrap{white-space:nowrap}
.fine{font-size:12.5px;color:var(--ink-3);line-height:1.55;margin:12px 0 0}
[hidden]{display:none !important}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;
  padding:10px 18px;font-size:14.5px;font-weight:500;text-decoration:none;border:1px solid transparent;
  transition:background .12s ease,border-color .12s ease,transform .06s ease;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover:not(:disabled){filter:brightness(1.12)}
.btn-ghost{background:var(--sheet);color:var(--ink);border-color:var(--rule)}
.btn-ghost:hover:not(:disabled){border-color:var(--ink-2)}
.btn-danger{background:var(--red);color:#fff}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn-lg{padding:13px 24px;font-size:15.5px}
.btn-block{width:100%}
.linkbtn{background:none;border:none;padding:0;color:var(--ink-2);text-decoration:underline;font-size:inherit}
.linkbtn:hover{color:var(--ink)}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 88%,transparent);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}
.nav-in{display:flex;align-items:center;gap:20px;height:62px}
.brand{font-family:var(--serif);font-size:24px;font-weight:600;color:var(--ink);text-decoration:none;letter-spacing:-.015em;
  display:inline-flex;align-items:center;gap:9px;line-height:1}
/* the logo: a serif E on an ink tile, same as the favicon */
.brandmark{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:7px;flex:none;
  background:var(--ink);color:var(--paper);font-size:20px;padding-bottom:2px;box-sizing:border-box}
.nav-links{display:flex;align-items:center;gap:18px;margin-left:auto;font-size:14.5px}
.nav-links a:not(.btn){color:var(--ink-2);text-decoration:none}
.nav-links a:not(.btn):hover,.nav-links a[aria-current]{color:var(--ink)}
.themebtn{background:none;border:1px solid var(--rule);border-radius:8px;width:34px;height:34px;color:var(--ink-2)}
.themebtn:hover{color:var(--ink);border-color:var(--ink-2)}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--rule);margin-top:70px;padding:24px 0 30px;font-size:12.5px;color:var(--ink-2)}
.foot-in{display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}

/* ---------- landing ---------- */
.hero{padding:70px 0 56px}
.hero-in{display:grid;grid-template-columns:1.25fr .9fr;gap:52px;align-items:center}
.eyebrow{font-size:12.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);margin:0 0 14px}
.hero h1{font-size:clamp(34px,5vw,54px);margin-bottom:18px}
.lede{font-size:17.5px;color:var(--ink-2);max-width:54ch;margin:0 0 26px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-card{background:var(--sheet);border:1px solid var(--rule);border-radius:18px;padding:26px 28px;
  box-shadow:0 22px 50px -24px rgba(20,30,45,.35)}
.hc-cap{font-size:11.5px;font-weight:600;letter-spacing:.07em;color:var(--ink-2)}
.hc-big{font-family:var(--serif);font-size:68px;font-weight:600;line-height:1;margin:8px 0 16px;letter-spacing:-.02em}
.hc-scale{position:relative;height:8px;border-radius:5px;margin-bottom:18px;
  background:linear-gradient(90deg,var(--red-bg),var(--ochre-bg),var(--green-bg));border:1px solid var(--rule)}
.hc-scale i{position:absolute;top:-4px;width:3px;height:14px;border-radius:2px;background:var(--ink)}
.hc-row{display:flex;justify-content:space-between;padding:9px 0;border-top:1px solid var(--rule-2);font-size:14px}
.hc-row b{font-family:var(--serif);font-size:19px}
.hc-tags{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.hc-tags span{font-size:12px;padding:3px 10px;border-radius:999px;background:var(--green-bg);color:var(--green)}
.band{background:var(--sheet);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:26px 22px}
.stats b{display:block;font-family:var(--serif);font-size:30px;font-weight:600;line-height:1.1}
.stats span{font-size:13px;color:var(--ink-2)}
.features{padding-top:66px}
.features h2,.steps h2{font-size:32px;margin-bottom:26px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid3 article{background:var(--sheet);border:1px solid var(--rule);border-radius:var(--radius);padding:22px}
.grid3 h3{font-size:19px;margin-bottom:8px}
.grid3 p{margin:0;color:var(--ink-2);font-size:14.5px}
.steps{padding-top:64px}
.steps ol{list-style:none;counter-reset:s;padding:0;margin:0 0 28px;display:grid;gap:12px}
.steps li{counter-increment:s;display:flex;gap:16px;align-items:baseline;background:var(--sheet);
  border:1px solid var(--rule);border-radius:var(--radius);padding:16px 20px;color:var(--ink-2)}
.steps li::before{content:counter(s);font-family:var(--serif);font-size:24px;font-weight:600;color:var(--ink);min-width:20px}
.steps li b{color:var(--ink)}

/* ---------- generic page ---------- */
.page{padding-top:48px}
.page > h1{font-size:36px;margin-bottom:24px}
.card{background:var(--sheet);border:1px solid var(--rule);border-radius:var(--radius);padding:24px 26px;margin-bottom:18px}
.card h2{font-size:20px;margin-bottom:14px}
.notice{background:var(--ochre-bg);color:var(--ochre);border-radius:10px;padding:12px 16px;margin-bottom:24px;font-size:14.5px}
.status{font-weight:600;margin:0 0 14px}
.status.ok{color:var(--green)} .status.no{color:var(--ink-2)}
.kv{display:grid;grid-template-columns:90px 1fr;gap:8px 16px;margin:0}
.kv dt{color:var(--ink-2)} .kv dd{margin:0}

/* ---------- pricing ---------- */
.plan{max-width:470px;margin:0 auto;background:var(--sheet);border:1px solid var(--rule);border-radius:20px;
  padding:30px 32px;box-shadow:0 22px 50px -26px rgba(20,30,45,.35)}
.plan-head{text-align:center;padding-bottom:20px;border-bottom:1px solid var(--rule-2);margin-bottom:20px}
.plan-name{display:block;font-size:13px;font-weight:600;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-2)}
.plan-price{display:block;font-family:var(--serif);font-size:58px;font-weight:600;line-height:1.05;margin:8px 0 4px}
.plan-term{font-size:13.5px;color:var(--ink-2)}
.checks{list-style:none;padding:0;margin:0 0 24px;display:grid;gap:10px}
.checks li{padding-left:28px;position:relative;font-size:14.5px}
.checks li::before{content:"\2713";position:absolute;left:0;top:0;color:var(--green);font-weight:700}
.faq{max-width:640px;margin:56px auto 0}
.faq h2{font-size:26px;margin-bottom:14px}
.faq details{border-bottom:1px solid var(--rule);padding:14px 0}
.faq summary{cursor:pointer;font-weight:500}
.faq p{color:var(--ink-2);margin:10px 0 0;font-size:14.5px}

/* ---------- auth ---------- */
.authwrap{display:flex;justify-content:center;padding-top:56px}
.auth{width:100%;max-width:420px;padding:32px}
.auth h1{font-size:30px;margin-bottom:6px}
.auth > p.muted{margin:0 0 22px;font-size:14.5px}
.switch{text-align:center;font-size:14px;margin:18px 0 0;color:var(--ink-2)}
.fld{display:block;margin-bottom:16px}
.fld > span{display:block;font-size:13px;font-weight:500;margin-bottom:6px}
.fld input,.fld select,.fld textarea{width:100%;padding:11px 13px;border:1px solid var(--rule);border-radius:10px;
  background:var(--paper);font-size:15px}
.fld input:focus,.fld select:focus{border-color:var(--ink-2);outline:none}
.fld input.invalid{border-color:var(--red)}
.fld small{display:block;font-size:12px;color:var(--ink-3);margin-top:5px}
.chk{display:flex;gap:9px;align-items:center;font-size:14px;margin:4px 0 16px}
.formerr{background:var(--red-bg);color:var(--red);border-radius:9px;padding:10px 13px;font-size:13.5px;margin-bottom:14px}
.formerr.ok{background:var(--green-bg);color:var(--green)}

/* ---------- checkout ---------- */
.checkout{display:grid;grid-template-columns:.9fr 1.1fr;gap:18px;align-items:start}
.line{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-top:1px solid var(--rule-2);font-size:14.5px}
.line.total{font-weight:600;font-size:16px}
.line b{font-family:var(--serif);font-size:18px}
.methods{display:grid;gap:10px;margin-bottom:18px}
.method{display:flex;gap:12px;align-items:center;padding:14px 16px;border:1.5px solid var(--rule);border-radius:12px;cursor:pointer}
.method:has(input:checked){border-color:var(--ink)}
.method.disabled{opacity:.5;cursor:not-allowed}
.method b{display:block;font-size:15px}
.method small{color:var(--ink-2);font-size:12.5px}
.refcode{font-family:var(--mono);font-size:32px;font-weight:500;letter-spacing:.08em;text-align:center;
  background:var(--paper);border:1.5px dashed var(--ink-3);border-radius:12px;padding:16px;margin:10px 0 16px;user-select:all}
.waiting{display:flex;gap:10px;align-items:center;background:var(--ochre-bg);color:var(--ochre);border-radius:10px;
  padding:12px 14px;font-size:13.5px;margin:16px 0 14px;line-height:1.45}
.waiting .dot{width:9px;height:9px;border-radius:50%;background:currentColor;flex:none;animation:pulse 1.4s ease-in-out infinite}
.waiting.done{background:var(--green-bg);color:var(--green);font-weight:500}
@keyframes pulse{50%{opacity:.25}}

/* ---------- tables & pills ---------- */
.tablewrap{overflow-x:auto;border:1px solid var(--rule);border-radius:12px;background:var(--sheet)}
.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th{text-align:left;font-size:11.5px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;
  color:var(--ink-2);padding:11px 14px;border-bottom:1px solid var(--rule);background:var(--sheet-2)}
.tbl td{padding:11px 14px;border-bottom:1px solid var(--rule-2);vertical-align:middle}
.tbl tbody tr:last-child td{border-bottom:none}
.tbl .acts{text-align:right;white-space:nowrap}
.emptyrow{text-align:center;color:var(--ink-3);padding:32px 14px !important}
.pill{display:inline-block;font-size:11.5px;font-weight:600;padding:3px 10px;border-radius:999px;text-transform:capitalize;
  background:var(--sheet-2);color:var(--ink-2);white-space:nowrap}
.pill.pending{background:var(--ochre-bg);color:var(--ochre)}
.pill.paid{background:var(--green-bg);color:var(--green)}
.pill.cancelled{background:var(--red-bg);color:var(--red)}
.pill.admin{background:var(--violet-bg);color:var(--violet)}

/* ---------- admin ---------- */
.adm-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.adm-head h1{font-size:34px}
.statrow{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-bottom:24px}
.stat{background:var(--sheet);border:1px solid var(--rule);border-radius:12px;padding:14px 16px}
.stat b{display:block;font-family:var(--serif);font-size:26px;font-weight:600;line-height:1.15}
.stat span{font-size:12.5px;color:var(--ink-2)}
.stat.hot{border-color:var(--ochre);background:var(--ochre-bg)}
.stat.hot b,.stat.hot span{color:var(--ochre)}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--rule);margin-bottom:16px}
.tabs button{background:none;border:none;border-bottom:2px solid transparent;padding:10px 14px;font-size:14.5px;
  color:var(--ink-2);margin-bottom:-1px}
.tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--ink);font-weight:500}
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.toolbar input,.toolbar select,.rowmenu{padding:8px 11px;border:1px solid var(--rule);border-radius:9px;
  background:var(--sheet);font-size:14px}
.toolbar input{min-width:240px}
.toolbar .grow{flex:1}
.pager{display:flex;gap:14px;align-items:center;justify-content:center;padding:14px 0;font-size:13.5px}
dialog{border:1px solid var(--rule);border-radius:16px;background:var(--sheet);color:var(--ink);padding:0;
  width:min(460px,calc(100% - 32px))}
dialog::backdrop{background:rgba(12,18,26,.45)}
.dlgbox{padding:24px 26px}
.dlgbox h2{font-size:21px;margin-bottom:10px}
.dlgbox p{font-size:14px;margin:0 0 16px}
.dlgrow{display:flex;gap:10px;justify-content:flex-end;margin-top:8px}
.flash{position:fixed;left:50%;bottom:26px;transform:translate(-50%,12px);opacity:0;z-index:200;
  background:var(--ink);color:var(--paper);padding:11px 18px;border-radius:10px;font-size:14px;
  transition:opacity .2s ease,transform .2s ease;pointer-events:none}
.flash.show{opacity:1;transform:translate(-50%,0)}
.flash.bad{background:var(--red);color:#fff}

/* ---------- small screens ---------- */
@media (max-width:860px){
  .hero-in{grid-template-columns:1fr;gap:34px}
  .grid3{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr 1fr}
  .checkout{grid-template-columns:1fr}
  .statrow{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:620px){
  .wrap{padding:0 16px}
  .nav-in{gap:10px}
  .nav-links{gap:10px;font-size:13.5px}
  .nav-links a[href="/pricing"]{display:none}
  .hero{padding:40px 0 34px}
  .grid3{grid-template-columns:1fr}
  .card,.plan,.auth{padding:22px 18px}
  .refcode{font-size:24px}
  .toolbar input{min-width:0;flex:1}
  .tbl{font-size:13px}
  .tbl th,.tbl td{padding:9px 10px}
}
@media (prefers-reduced-motion:reduce){*{transition:none !important;animation:none !important}}

/* admin gets the wide layout, so its header should line up with it */
body.is-admin .nav .wrap{max-width:1240px}
.nav-links .linkbtn{text-decoration:none;color:var(--ink-2);font-size:14.5px}
.nav-links .linkbtn:hover{color:var(--ink)}

/* ---------- referrals ---------- */
.line.discount{color:var(--green)}
.line.discount b{color:var(--green)}
.refbox{margin:2px 0 14px}
.refbox .fld{margin-bottom:6px}
.fld small.inline{display:inline;margin:0 0 0 6px;font-weight:400}
.refrow{display:flex;gap:8px}
.refrow input{flex:1;min-width:0;padding:11px 13px;border:1px solid var(--rule);border-radius:10px;background:var(--sheet);
  font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase}
.refrow input::placeholder{text-transform:none;letter-spacing:0;font-family:var(--sans)}
.refrow input:focus{border-color:var(--ink-2);outline:none}
.refrow input.invalid{border-color:var(--red)}
.refmsg{font-size:13px;margin:4px 0 0;min-height:1.2em;color:var(--ink-2)}
.refmsg.ok{color:var(--green)} .refmsg.bad{color:var(--red)}
.refshare{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap;margin:16px 0 18px}
.refshare > div{flex:1;min-width:160px}
.refshare small{font-size:12px;color:var(--ink-2)}
.refcode.sm{font-size:22px;padding:9px 14px;margin:4px 0 0;text-align:left}
.refstats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.refstats div{background:var(--sheet-2);border-radius:10px;padding:10px 12px}
.refstats b{display:block;font-family:var(--serif);font-size:21px;line-height:1.2}
.refstats span{font-size:12px;color:var(--ink-2)}
.pill.owed{background:var(--ochre-bg);color:var(--ochre)}
.pill.free{background:var(--sheet-2);color:var(--ink-2)}
.pill.referrer{background:transparent;box-shadow:inset 0 0 0 1px var(--violet);color:var(--violet)}
.statrow{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.stat small{display:block;font-size:11.5px;color:var(--ink-3);margin-top:2px}
.amt{font-family:var(--serif);font-size:16px;font-weight:600}
.dlgbox .warn{background:var(--red-bg);color:var(--red);border-radius:10px;padding:12px 14px;font-size:13.5px;margin:0 0 16px}
.dlgbox .warn ul{margin:6px 0 0;padding-left:18px}
.fld .quick{display:flex;gap:6px;margin-top:7px;flex-wrap:wrap}
.fld .quick button{font-size:12.5px;padding:4px 10px;border:1px solid var(--rule);border-radius:999px;background:var(--sheet-2)}
@media (max-width:620px){
  .refstats{grid-template-columns:1fr 1fr 1fr;gap:6px}
  .refstats b{font-size:17px}
  .refshare .btn{flex:1}
}
@media (max-width:620px){
  .nav-links a,.nav-links .linkbtn{white-space:nowrap}
  /* admins get an extra link that doesn't fit a phone's bar; the account page links to it instead */
  .nav-links a[href="/admin"]{display:none}
}

/* phones: logged-in bars are full, so the logo tile stands in for the name */
@media (max-width:520px){ body:not(.guest) .nav .brandname{display:none} .nav .brandmark{width:32px;height:32px;font-size:23px} }

/* ---------- UPI ---------- */
.upiqr{text-align:center;margin:6px 0 14px}
.upiqr img{display:block;margin:0 auto;width:220px;height:220px;border-radius:12px;background:#fff;padding:6px;
  border:1px solid var(--rule)}
.upiqr p{font-size:13px;color:var(--ink-2);margin:8px 0 0}
.upiapp{display:none;margin:4px 0 14px}
.upiapp-or{display:none}
@media (pointer:coarse){ .upiapp{display:flex} .upiapp-or{display:inline} }
.line.upiid{align-items:center}
.line.upiid .mono{margin-left:auto;font-size:14px}
.notebox{display:flex;gap:12px;align-items:center;justify-content:space-between;background:var(--ochre-bg);
  border-radius:10px;padding:10px 12px;margin:12px 0 8px}
.notebox small{display:block;font-size:12px;color:var(--ochre);font-weight:600}
.notebox .mono{font-size:15px;margin-top:2px;word-break:break-word}
.claim{margin:16px 0 4px;padding-top:14px;border-top:1px solid var(--rule-2)}
.claim .fld{margin-bottom:6px}
.claim input{font-family:var(--mono)}
.pill.upi{background:var(--violet-bg);color:var(--violet)}
.pill.claimed{background:var(--green-bg);color:var(--green)}