/* Mandata site. Layout: a white masthead, a pale sky-wash hero, then wide reading columns on white and near-white bands.
   One light theme on purpose. Colour comes from the app icon: teal paper plane, orange check. */
:root{
  --bg:#ffffff; --wash:#f4f9fb; --wash2:#eaf5f8; --surface:#ffffff; --tint:#f3f6f9; --line:#e3e9ef; --line2:#d3dde6;
  --ink:#122033; --body:#33404f; --muted:#5d6b7c;
  --teal:#086c80; --teal-bright:#16a6bf; --teal-soft:#e4f5f8;
  --check:#f5901f; --check-soft:#fff1e1; --check-ink:#9a4a00;
  --green:#21722f; --green-soft:#e6f4ea;
  --shadow:0 1px 2px rgba(18,32,51,.05),0 10px 30px rgba(18,32,51,.07);
  --font-display:"Bricolage Grotesque","Segoe UI",system-ui,sans-serif;
  --font-body:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  --wrap:1120px; --r:14px;
  color-scheme:light;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--bg);color:var(--body);font:400 17px/1.65 var(--font-body)}
img{max-width:100%}
a{color:var(--teal);text-underline-offset:3px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:6px}
h1,h2,h3{font-family:var(--font-display);color:var(--ink);line-height:1.12;letter-spacing:-.02em;text-wrap:balance;margin:0}
h1{font-size:clamp(2.3rem,5.2vw,3.7rem);font-weight:750}
h2{font-size:clamp(1.65rem,3vw,2.3rem);font-weight:700}
h3{font-size:1.15rem;font-weight:650}
p{margin:0}
code,kbd,.mono{font-family:var(--font-mono);font-size:.88em}
code{overflow-wrap:anywhere;background:var(--tint);border:1px solid var(--line);border-radius:6px;padding:.05em .4em;color:var(--ink)}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:clamp(16px,4vw,32px)}
.eyebrow{font:600 .76rem/1 var(--font-mono);text-transform:uppercase;letter-spacing:.12em;color:var(--teal)}
.lede{font-size:1.13rem;color:var(--muted);max-width:62ch}
.stack{display:flex;flex-direction:column;gap:14px}
.fine{font-size:.88rem;color:var(--muted)}

/* masthead */
.mast{background:rgba(255,255,255,.92);border-bottom:1px solid var(--line);position:sticky;top:env(safe-area-inset-top,0px);z-index:10;backdrop-filter:saturate(1.4) blur(8px)}
.mast nav{display:flex;align-items:center;gap:8px 24px;flex-wrap:wrap;padding-block:12px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font:700 1.2rem/1 var(--font-display);letter-spacing:-.01em;margin-right:auto}
.logo img{width:32px;height:32px;border-radius:8px}
.mast nav a:not(.logo){color:var(--muted);text-decoration:none;font-size:.95rem;font-weight:500}
.mast nav a:not(.logo):hover,.mast nav a[aria-current="page"]{color:var(--ink)}
.mast nav a.navcta{color:#2a1500;background:var(--check);padding:7px 15px;border-radius:999px;font-weight:600}
.mast nav a.navcta:hover{color:#2a1500;filter:brightness(1.04)}

/* hero */
.hero{background:radial-gradient(1200px 420px at 85% 0,var(--wash2),transparent 70%),linear-gradient(180deg,var(--wash) 0,var(--bg) 100%);border-bottom:1px solid var(--line);padding-block:56px 72px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:56px;align-items:center}
.hero-copy{display:flex;flex-direction:column;gap:22px}
.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;border-radius:12px;font-weight:600;font-size:1rem;text-decoration:none;border:1px solid transparent;transition:transform .12s,filter .12s,background .12s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--check);color:#2a1500;box-shadow:0 6px 18px rgba(245,144,31,.28)}
.btn-primary:hover{filter:brightness(1.04)}
.btn-ghost{border-color:var(--line2);color:var(--ink);background:var(--surface)}
.btn-ghost:hover{background:var(--tint)}
.btn small{font-weight:500;opacity:.75;font-size:.82rem}

/* thread to task demo */
.demo{display:grid;gap:12px;font-size:.92rem}
.mail{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 15px}
.mail header{display:flex;justify-content:space-between;gap:10px;font:500 .74rem/1.3 var(--font-mono);color:var(--muted);margin-bottom:4px}
.mail p{line-height:1.55}
.mail mark{background:var(--check-soft);color:var(--check-ink);border-radius:4px;padding:0 3px}
.mail.closing mark{background:var(--teal-soft);color:var(--teal)}
.arrow{font:600 .72rem/1 var(--font-mono);color:var(--teal);letter-spacing:.1em;text-transform:uppercase;display:flex;align-items:center;gap:10px;padding-block:2px}
.arrow::before,.arrow::after{content:"";flex:1;height:1px;background:var(--line2)}
.task{background:var(--surface);color:var(--body);border:1px solid var(--line);border-top:3px solid var(--teal-bright);border-radius:12px;padding:15px 17px;box-shadow:var(--shadow);display:grid;gap:10px}
.task-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.task h3{font-size:1rem;flex:1;min-width:0}
.pill{font:600 .7rem/1 var(--font-mono);text-transform:uppercase;letter-spacing:.06em;padding:5px 9px;border-radius:999px;white-space:nowrap}
.pill.done{background:var(--green-soft);color:var(--green)}
.task dl{display:grid;grid-template-columns:auto minmax(0,1fr);gap:4px 16px;margin:0;font-size:.86rem}
.task dt{color:var(--muted)}
.task dd{margin:0;color:var(--ink)}

/* sections */
section.band{padding-block:88px}
section.band.alt{background:var(--wash);border-block:1px solid var(--line)}
.head{display:flex;flex-direction:column;gap:12px;margin-bottom:44px;max-width:760px}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.feat{display:flex;flex-direction:column;gap:10px;padding:24px;border-radius:var(--r);background:var(--surface);border:1px solid var(--line)}
.feat p{color:var(--muted);font-size:.97rem}
.ico{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:var(--teal-soft);color:var(--teal)}
.ico svg{width:22px;height:22px}

/* life of a task: a real sequence */
.life{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));counter-reset:s;border-top:2px solid var(--line);padding:0;margin:0}
.life li{list-style:none;padding:24px 22px 0 0;position:relative;display:flex;flex-direction:column;gap:8px}
.life li::before{counter-increment:s;content:counter(s);position:absolute;top:-15px;left:0;width:28px;height:28px;border-radius:50%;background:var(--teal);color:#fff;display:grid;place-items:center;font:600 .8rem/1 var(--font-mono);box-shadow:0 0 0 4px var(--bg)}
.life li:last-child::before{background:var(--check);color:#2a1500}
.life p{color:var(--muted);font-size:.95rem}

/* principles */
.rules{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 48px}
.rule{padding-block:20px;border-top:1px solid var(--line);display:grid;grid-template-columns:28px minmax(0,1fr);gap:4px 14px;align-content:start}
.rule svg{width:22px;height:22px;color:var(--check-ink);margin-top:3px;grid-row:span 2}
.rule p{color:var(--muted);font-size:.96rem}

/* call to action */
.cta{background:linear-gradient(120deg,var(--teal-soft),var(--check-soft));border:1px solid var(--line);border-radius:20px;padding:44px clamp(22px,4vw,48px);display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.cta p{color:var(--body);max-width:52ch}
.cta code{background:rgba(255,255,255,.7)}

/* download page */
.dl-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:28px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:20px;align-items:center}
.dl-card h2{font-size:1.45rem;overflow-wrap:anywhere}
.dl-card img{width:72px;height:72px;border-radius:16px}
.dl-meta{display:flex;flex-wrap:wrap;gap:6px 18px;font:500 .82rem/1.4 var(--font-mono);color:var(--muted);margin-top:6px}
.dl-card .btn-primary{white-space:nowrap}
.steps{counter-reset:st;display:flex;flex-direction:column;padding:0;margin:0}
.steps li{list-style:none;display:grid;grid-template-columns:44px minmax(0,1fr);gap:4px 16px;padding-block:20px;border-top:1px solid var(--line)}
.steps li::before{counter-increment:st;content:counter(st);grid-row:span 2;width:36px;height:36px;border-radius:10px;background:var(--teal-soft);color:var(--teal);display:grid;place-items:center;font:700 .95rem/1 var(--font-mono)}
.steps p{color:var(--muted)}
.req{width:100%;border-collapse:collapse;font-size:.95rem}
.req th,.req td{text-align:left;padding:12px 14px;border-top:1px solid var(--line);vertical-align:top}
.req th{font-weight:600;color:var(--ink);width:30%}
.req td{color:var(--muted)}
.tablebox{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.tablebox .req tr:first-child th,.tablebox .req tr:first-child td{border-top:0}
.note{background:var(--teal-soft);border-radius:12px;padding:16px 18px;font-size:.95rem;color:var(--body)}
.note b{color:var(--ink)}
details{border-top:1px solid var(--line);padding-block:16px}
details:last-child{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font:500 1.2rem/1 var(--font-mono);color:var(--teal)}
details[open] summary::after{content:"\2212"}
details p{margin-top:10px;color:var(--muted)}
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:start}
.page-hero{padding-block:56px 64px}
.page-hero .hero-copy{max-width:820px}
.after-hero{padding-top:0;margin-top:-32px}

/* about page */
.word{font-family:var(--font-display);font-size:clamp(3rem,9vw,6.2rem);font-weight:800;letter-spacing:-.04em;line-height:.95;color:var(--ink)}
.word span{color:var(--teal)}
.etym{display:flex;flex-wrap:wrap;gap:10px;font:500 .9rem/1.3 var(--font-mono)}
.etym span{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 12px;color:var(--ink)}
.etym span i{color:var(--muted);font-style:normal}
.prose{max-width:68ch;display:flex;flex-direction:column;gap:18px}
.prose h2{margin-top:18px}
.facts{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px 24px;margin:0}
.facts dt{font:600 .76rem/1.6 var(--font-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.facts dd{margin:0;color:var(--ink)}

/* download page: one tab per system, the one-line install command, and the package files */
.os-tabs{display:inline-flex;gap:4px;padding:4px;background:var(--tint);border:1px solid var(--line);border-radius:14px;align-self:flex-start;max-width:100%}
.os-tabs button{font:600 1rem/1 var(--font-body);color:var(--muted);background:none;border:1px solid transparent;border-radius:10px;padding:11px 22px;cursor:pointer}
.os-tabs button:hover{color:var(--ink)}
.os-tabs button[aria-selected=true]{background:var(--surface);color:var(--ink);border-color:var(--line2);box-shadow:0 1px 3px rgba(18,32,51,.08)}
.os-panel[hidden]{display:none}
.dl-cmd{grid-template-columns:auto minmax(0,1fr);align-items:start}
.tag{display:inline-block;vertical-align:middle;margin-left:8px;font:600 .7rem/1 var(--font-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--check-ink);background:var(--check-soft);border:1px solid #f6c48d;border-radius:20px;padding:5px 9px}
.cmd{display:flex;align-items:stretch;border:1px solid var(--line2);border-radius:12px;background:var(--ink);overflow:hidden}
.cmd code{flex:1;min-width:0;background:none;border:0;border-radius:0;color:#e8f4f7;padding:14px 16px;font-size:.92rem;overflow-wrap:anywhere;user-select:all}
.cmd .copy{flex:none;font:600 .9rem/1 var(--font-body);color:var(--ink);background:var(--teal-soft);border:0;border-left:1px solid var(--line2);padding:0 18px;cursor:pointer}
.cmd .copy:hover{background:#d3eef3}
.dl-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.dl-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.dl-file{display:flex;flex-direction:column;gap:4px;padding:18px 20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);text-decoration:none;color:var(--muted);font-size:.92rem;transition:border-color .12s,transform .12s}
.dl-file:hover{border-color:var(--teal-bright);transform:translateY(-1px)}
.dl-file b{font:650 1.1rem/1.3 var(--font-display);color:var(--ink)}
.dl-file b::after{content:" \2193";color:var(--teal)}
.platforms{display:flex;flex-wrap:wrap;gap:8px 18px;font:500 .85rem/1.4 var(--font-mono);color:var(--muted)}
.platforms a{color:inherit}

/* phone page */
.ph-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.ph-cards.one{grid-template-columns:minmax(0,1fr);max-width:820px}
.ph-card{display:grid;grid-template-columns:minmax(0,1fr);gap:22px;align-items:start;padding:28px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);scroll-margin-top:90px}
.ph-card.ph-mine{border-color:var(--teal-bright)}
.ph-qr{justify-self:start;padding:10px;background:#fff;border:1px solid var(--line2);border-radius:14px}
.ph-qr img{display:block;width:190px;height:190px}
.ph-steps{margin:4px 0 0;padding-left:20px;color:var(--muted);font-size:.95rem}
.ph-steps li{margin:0 0 8px}
.ph-steps b{color:var(--ink)}
.ph-share{vertical-align:-3px;color:var(--teal)}
.ph-dl{align-self:flex-start}

footer.foot{background:var(--wash);border-top:1px solid var(--line);color:var(--muted);padding-block:36px;font-size:.9rem}
footer.foot .wrap{display:flex;flex-wrap:wrap;gap:16px 32px;justify-content:space-between}

@media (max-width:900px){
  .hero-grid,.two,.ph-cards{grid-template-columns:minmax(0,1fr)}
  .grid3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .life{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:36px}
  .rules{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:600px){
  body{font-size:16px}
  .grid3,.life{grid-template-columns:minmax(0,1fr)}
  .dl-card{grid-template-columns:minmax(0,1fr)}
  .ph-card{padding:22px}
  .ph-qr{justify-self:center}
  .dl-grid,.dl-grid.three{grid-template-columns:minmax(0,1fr)}
  .os-tabs{align-self:stretch}
  .os-tabs button{flex:1;padding:11px 8px}
  .cmd{flex-direction:column}
  .cmd .copy{border-left:0;border-top:1px solid var(--line2);padding:12px}
  section.band{padding-block:56px}
  .hero{padding-block:36px 48px}
  .mast nav{gap:6px 16px}
  .mast nav a:not(.logo):not(.navcta){font-size:.88rem}
}
/* Phones: the logo and Download on the first line, the five links spread evenly on the second. */
@media (max-width:640px){
  .mast nav{gap:4px 8px;padding-block:10px 6px}
  .mast nav::before{content:"";order:1;flex-basis:100%}
  .mast nav a:not(.logo):not(.navcta){order:2;flex:1 1 auto;text-align:center;padding-block:6px}
}