/* Rotarithm marketing pages, built on the Rotarithm design system: navy, teal and white, with amber as the one contrast colour.
   Layout: one centred column of bands; the hero pairs the promise with a live-looking rota; the name section spells out ROTARITHM. */
@font-face{font-family:'Lexend';src:url('/assets/fonts/lexend.woff') format('woff');font-weight:100 900;font-display:swap}
@font-face{font-family:'JetBrains Mono';src:url('/assets/fonts/jetbrains-mono.woff') format('woff');font-weight:100 800;font-display:swap}
:root{
  --font-ui:'Lexend',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-data:'JetBrains Mono',ui-monospace,Consolas,monospace;
  --surface:#FFFFFF;--surface-alt:#F4F7F7;--ink:#0F2B45;--ink-muted:#4A5563;--line:#D5DDE0;
  --brand-navy:#0F2B45;--brand-teal:#22C1A0;--teal-text:#0E7A67;--amber:#F5B83D;--on-amber:#0F2B45;
  --band:#0F2B45;--band-ink:#FFFFFF;--band-muted:#B8C7D1;--band-panel:#17385A;
  --day:#F5B83D;--day-ink:#0F2B45;--night:#2F4B7C;--night-ink:#FFFFFF;--off:#E3E8EA;--off-ink:#4A5563;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --surface:#0B1622;--surface-alt:#12212F;--ink:#EEF3F6;--ink-muted:#A9B7C2;--line:#26394A;
  --teal-text:#5EE6C5;--band:#08111B;--band-panel:#12212F;
  --night:#4A5FB0;--off:#24333F;--off-ink:#A9B7C2;
  color-scheme:dark}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--surface);color:var(--ink);font-family:var(--font-ui);font-size:17px;line-height:1.6}
h1,h2,h3{text-wrap:balance;margin:0;letter-spacing:-.015em}
p{margin:0}
a{color:inherit}
:focus-visible{outline:3px solid var(--brand-teal);outline-offset:3px}
.wrap{max-width:1200px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;background:var(--amber);color:var(--on-amber);padding:10px 14px;border-radius:8px;z-index:9}

/* header */
.top{border-bottom:1px solid var(--line);background:var(--surface)}
.top .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;padding-block:14px}
.logo{display:inline-flex;align-items:center}
.logo img{height:34px;width:auto;display:block}
.nav{display:flex;flex-wrap:wrap;align-items:center;gap:6px 22px;font-size:15px;font-weight:500}
.nav a{text-decoration:none;color:var(--ink-muted)}.nav a:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 20px;border-radius:8px;font-weight:700;text-decoration:none;border:2px solid var(--ink);color:var(--ink);background:transparent;font-size:16px}
.btn.pri{background:var(--amber);border-color:var(--amber);color:var(--on-amber)}
.btn.pri:hover{filter:brightness(1.05)}
.nav .btn{min-height:44px}
.nav .btn.pri{color:var(--on-amber)}

/* hero */
.hero .wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,460px),1fr));gap:48px;align-items:center;padding-block:72px 64px}
.eyebrow{font:700 12.5px/1.4 var(--font-data);letter-spacing:.14em;text-transform:uppercase;color:var(--teal-text)}
.hero h1{font-size:clamp(38px,5.2vw,60px);line-height:1.05;font-weight:700;margin-top:16px}
.hero .lead{font-size:19px;color:var(--ink-muted);margin-top:20px;max-width:34em}
.ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.promise{display:flex;gap:10px;align-items:flex-start;margin-top:22px;font-size:15px;color:var(--ink-muted);max-width:34em}
.promise svg{flex:none;margin-top:2px}
.board{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:12px;min-width:0}
.board-h{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px;font-size:15px}
.board-h span{font:500 12px/1.4 var(--font-data);color:var(--ink-muted)}
.gridx{overflow-x:auto}
.rg{display:grid;grid-template-columns:118px repeat(14,minmax(22px,1fr));gap:4px;min-width:470px;align-items:center}
.rg .hd{font:500 11px/1 var(--font-data);color:var(--ink-muted);text-align:center;padding:4px 0;border-radius:4px}
.rg .hd.wed{background:var(--brand-teal);color:#0F2B45;font-weight:700}
.rg .lab{font-size:12.5px;font-weight:500;white-space:nowrap}
.c{height:28px;border-radius:4px;display:flex;align-items:center;justify-content:center;font:700 11px/1 var(--font-data)}
.c.d{background:var(--day);color:var(--day-ink)}.c.n{background:var(--night);color:var(--night-ink)}.c.o{background:var(--off);color:var(--off-ink)}
.rg .cov{font:600 11px/1 var(--font-data);text-align:center;color:var(--ink-muted)}
.rg .cov.hi{color:var(--teal-text);font-weight:800}
.legend{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:13px;color:var(--ink-muted)}
.legend span{display:inline-flex;align-items:center;gap:6px}.legend .c{width:16px;height:16px}
.legend .sw{width:16px;height:16px;border-radius:4px;background:var(--brand-teal)}

/* bands */
.band{padding-block:80px}
.band.alt{background:var(--surface-alt);border-block:1px solid var(--line)}
.band.dark{background:var(--band);color:var(--band-ink)}
.band h2{font-size:clamp(30px,3.6vw,42px);line-height:1.12;font-weight:700}
.band .sub{font-size:18px;color:var(--ink-muted);margin-top:14px;max-width:40em}
.band.dark .sub,.band.dark .eyebrow{color:var(--band-muted)}

/* name */
.letters{list-style:none;margin:40px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,330px),1fr));gap:0 40px}
.letters li{display:grid;grid-template-columns:56px 1fr;gap:4px 16px;padding:18px 0;border-top:1px solid var(--line)}
.letters .L{grid-row:span 2;font:800 44px/1 var(--font-data);color:var(--ink)}
.letters li:nth-child(4) .L{color:var(--teal-text)}
.letters strong{font-size:18px;font-weight:700}
.letters p{font-size:15.5px;color:var(--ink-muted);grid-column:2}
.soon{font:700 10.5px/1 var(--font-data);letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--line);color:var(--ink-muted);border-radius:99px;padding:4px 8px;margin-left:8px;vertical-align:3px;white-space:nowrap}

/* steps */
.steps{list-style:none;margin:40px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:20px;counter-reset:s}
.steps li{background:var(--band-panel);border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:10px;counter-increment:s}
.steps li::before{content:counter(s,decimal-leading-zero);font:700 14px/1 var(--font-data);color:var(--brand-teal)}
.steps h3{font-size:20px;font-weight:700}
.steps p{color:var(--band-muted);font-size:15.5px}

/* features */
.feats{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:16px;margin-top:40px}
.feat{border:1px solid var(--line);border-radius:16px;padding:24px;background:var(--surface);display:flex;flex-direction:column;gap:8px}
.feat h3{font-size:19px;font-weight:700}
.feat p{color:var(--ink-muted);font-size:15.5px}

/* privacy */
.priv{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:40px;align-items:start}
.checks{list-style:none;margin:0;padding:0}
.checks li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.checks svg{flex:none;margin-top:3px}
.checks strong{display:block;font-size:17px;font-weight:700}
.checks span{color:var(--ink-muted);font-size:15.5px}

/* faq */
.faq{margin-top:32px;border-top:1px solid var(--line);max-width:860px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center;padding:20px 0;font-size:18px;font-weight:600;min-height:48px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:700 22px/1 var(--font-data);color:var(--teal-text);flex:none}
.faq details[open] summary::after{content:"\2212"}
.faq details p{color:var(--ink-muted);padding:0 0 20px;max-width:70ch}

/* cta + footer */
.cta{background:var(--band);color:var(--band-ink)}
.cta .wrap{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:center}
.cta .sub{color:var(--band-muted)}
footer{background:var(--band);color:var(--band-muted);font-size:14px;border-top:1px solid var(--band-panel)}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px 24px;justify-content:space-between;align-items:center;padding-block:28px}
footer img{height:26px;width:auto;display:block}
footer nav{display:flex;gap:18px;flex-wrap:wrap}
footer a{color:var(--band-ink)}

/* text pages */
.doc{max-width:760px;padding-block:56px 80px}
.doc h1{font-size:clamp(32px,4vw,44px);font-weight:700}
.doc h2{font-size:22px;margin-top:36px;font-weight:700}
.doc p,.doc li{color:var(--ink-muted);margin-top:12px}
.doc a{color:var(--teal-text)}
.doc ul{padding-left:20px}
.doc .updated{font:500 13px var(--font-data);margin-top:10px}
@media (prefers-reduced-motion:no-preference){.btn,.nav a{transition:background-color .15s,color .15s,border-color .15s,filter .15s}}