/* Ember — Halo design system. Tokens mirror the Android app's ui/Colors.kt.
   Warm-paper light + true-dark, theme-aware (prefers-color-scheme + data-theme). */

:root{
  --paper:#FAF8F6; --surface:#FFFFFF; --raised:#F3EDE9; --sunken:#F7F1EC;
  --ink:#1B1917; --ink-dim:#79726C; --ink-faint:#A69C95;
  --line:#ECE4DE; --line-soft:#F3ECE6;
  --ember:#EE5A2C; --ember-press:#D94E23; --amber:#FF8A3D; --red:#E5342B;
  --live:#1E9E68; --live-dot:#26A56F;
  --on-accent:#FFFFFF;
  --grad:linear-gradient(135deg,#FF8A3D 0%,#FF5A2C 46%,#E5342B 100%);
  --glow:rgba(255,90,44,.16);
  --shadow-sm:0 1px 2px rgba(27,25,23,.05);
  --shadow:0 2px 4px rgba(27,25,23,.04),0 12px 32px rgba(27,25,23,.07);
  --shadow-lg:0 8px 24px rgba(27,25,23,.08),0 30px 60px rgba(27,25,23,.10);
  --r-s:12px; --r-m:16px; --r-l:22px; --r-xl:28px;
  --container:1120px;
  --fs-eyebrow:.75rem;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#131110; --surface:#1C1817; --raised:#232020; --sunken:#191515;
    --ink:#EFE8E3; --ink-dim:#A0968F; --ink-faint:#6F6660;
    --line:#2B2422; --line-soft:#241F1D;
    --ember:#FF6A3D; --ember-press:#FF8055; --amber:#FF9A5A; --red:#FF5247;
    --live:#45C98A; --live-dot:#45C98A;
    --on-accent:#1A0E07;
    --grad:linear-gradient(135deg,#FF9A5A 0%,#FF6A3D 46%,#FF5247 100%);
    --glow:rgba(255,106,61,.20);
    --shadow-sm:0 1px 2px rgba(0,0,0,.4);
    --shadow:0 2px 4px rgba(0,0,0,.3),0 12px 32px rgba(0,0,0,.45);
    --shadow-lg:0 8px 24px rgba(0,0,0,.5),0 30px 60px rgba(0,0,0,.55);
    color-scheme:dark;
  }
}
:root[data-theme="light"]{
  --paper:#FAF8F6; --surface:#FFFFFF; --raised:#F3EDE9; --sunken:#F7F1EC;
  --ink:#1B1917; --ink-dim:#79726C; --ink-faint:#A69C95;
  --line:#ECE4DE; --line-soft:#F3ECE6;
  --ember:#EE5A2C; --ember-press:#D94E23; --amber:#FF8A3D; --red:#E5342B;
  --live:#1E9E68; --live-dot:#26A56F; --on-accent:#FFFFFF;
  --grad:linear-gradient(135deg,#FF8A3D 0%,#FF5A2C 46%,#E5342B 100%);
  --glow:rgba(255,90,44,.16);
  --shadow-sm:0 1px 2px rgba(27,25,23,.05);
  --shadow:0 2px 4px rgba(27,25,23,.04),0 12px 32px rgba(27,25,23,.07);
  --shadow-lg:0 8px 24px rgba(27,25,23,.08),0 30px 60px rgba(27,25,23,.10);
  color-scheme:light;
}
:root[data-theme="dark"]{
  --paper:#131110; --surface:#1C1817; --raised:#232020; --sunken:#191515;
  --ink:#EFE8E3; --ink-dim:#A0968F; --ink-faint:#6F6660;
  --line:#2B2422; --line-soft:#241F1D;
  --ember:#FF6A3D; --ember-press:#FF8055; --amber:#FF9A5A; --red:#FF5247;
  --live:#45C98A; --live-dot:#45C98A; --on-accent:#1A0E07;
  --grad:linear-gradient(135deg,#FF9A5A 0%,#FF6A3D 46%,#FF5247 100%);
  --glow:rgba(255,106,61,.20);
  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow:0 2px 4px rgba(0,0,0,.3),0 12px 32px rgba(0,0,0,.45);
  --shadow-lg:0 8px 24px rgba(0,0,0,.5),0 30px 60px rgba(0,0,0,.55);
  color-scheme:dark;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
.wrap{max-width:var(--container);margin-inline:auto;padding-inline:clamp(1.15rem,5vw,2rem)}
section{padding-block:clamp(3.75rem,8vw,6.5rem)}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;text-wrap:balance;letter-spacing:-.02em;font-weight:700}
p{margin:0}
img,svg{max-width:100%}
:focus-visible{outline:2.5px solid var(--ember);outline-offset:3px;border-radius:6px}

.eyebrow{font-size:var(--fs-eyebrow);font-weight:650;letter-spacing:.11em;text-transform:uppercase;color:var(--ember)}
.lead{font-size:clamp(1.05rem,1.4vw,1.2rem);color:var(--ink-dim);line-height:1.55;max-width:56ch}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* flame marks */
.tile{display:inline-grid;place-items:center;background:var(--grad);border-radius:28%;box-shadow:var(--shadow-sm),inset 0 1px 0 rgba(255,255,255,.25)}
.tile svg{width:64%;height:64%;fill:#fff}
.tile.s{width:34px;height:34px}
.tile.l{width:60px;height:60px}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 82%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}
.nav.scrolled{border-bottom-color:var(--line-soft);box-shadow:var(--shadow-sm)}
.nav .wrap{display:flex;align-items:center;gap:1.25rem;padding-block:.7rem}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:680;font-size:1.12rem;letter-spacing:-.02em;color:var(--ink)}
.nav-links{display:flex;gap:1.5rem;margin-left:auto;font-size:.94rem;color:var(--ink-dim)}
.nav-links a:hover{color:var(--ink)}
.nav-actions{display:flex;align-items:center;gap:.6rem}
.nav-links + .nav-actions{margin-left:0}
.nav-links ~ .nav-actions{margin-left:0}
.icon-btn{width:38px;height:38px;display:grid;place-items:center;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--ink-dim);cursor:pointer}
.icon-btn:hover{color:var(--ink);border-color:var(--ink-faint)}
.icon-btn svg{width:18px;height:18px}
@media(max-width:760px){.nav-links{display:none}.nav .wrap>.nav-actions{margin-left:auto}}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.55rem;font-weight:600;font-size:.98rem;padding:.72rem 1.15rem;border-radius:var(--r-s);border:1px solid transparent;cursor:pointer;transition:transform .12s ease,box-shadow .12s,background .12s,border-color .12s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--ember);color:var(--on-accent);box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--ember-press);box-shadow:var(--shadow)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink-faint)}
.store{align-items:center;padding:.55rem 1.05rem}
.store .col{display:flex;flex-direction:column;align-items:flex-start;gap:2px}
.store-sub{font-size:.66rem;font-weight:500;line-height:1;letter-spacing:.02em;text-transform:uppercase}
.store-main{font-size:1.02rem;font-weight:680;line-height:1.05}
.btn-primary .store-sub{color:color-mix(in srgb,var(--on-accent) 78%,transparent)}
.btn-ghost .store-sub{color:var(--ink-faint)}
.btn-ghost .store-main{color:var(--ink)}

/* hero */
.hero{position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-30% 30% auto -10%;height:520px;background:radial-gradient(60% 60% at 30% 30%,var(--glow),transparent 70%);pointer-events:none;filter:blur(6px)}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,5vw,4rem);align-items:center;padding-block:clamp(3rem,7vw,5.5rem)}
.hero h1{font-size:clamp(2.5rem,5.4vw,4.05rem);line-height:1.02;letter-spacing:-.035em;margin:1rem 0 1.1rem}
.hero .lead{max-width:52ch}
.cta-row{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.6rem}
.trust{margin-top:1.05rem;font-size:.86rem;color:var(--ink-faint);display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.trust b{color:var(--ink-dim);font-weight:600}
@media(max-width:880px){.hero .wrap{grid-template-columns:1fr;padding-block:2.5rem}.hero-visual{order:-1}}

/* device duo */
.duo{position:relative;display:grid;grid-template-columns:1fr 1fr;align-items:center;min-height:300px}
.dev{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-lg);position:relative;z-index:2}
.phone{border-radius:26px;padding:.7rem;justify-self:end;width:min(200px,86%);aspect-ratio:9/17.5}
.mac{border-radius:16px;padding:.6rem;justify-self:start;width:min(300px,104%);aspect-ratio:16/10.5;margin-left:-14px}
.screen{background:var(--sunken);border:1px solid var(--line-soft);border-radius:18px;height:100%;padding:.6rem;display:flex;flex-direction:column;gap:.5rem;overflow:hidden}
.mac .screen{border-radius:11px}
.bar{display:flex;align-items:center;gap:.4rem;font-size:.66rem;font-weight:640;color:var(--ink-dim)}
.bar .dot{width:7px;height:7px;border-radius:50%;background:var(--live-dot);box-shadow:0 0 0 3px color-mix(in srgb,var(--live-dot) 22%,transparent)}
.chip{margin-left:auto;font-size:.6rem;font-weight:640;color:var(--live);background:color-mix(in srgb,var(--live-dot) 14%,transparent);padding:2px 7px;border-radius:999px;display:inline-flex;align-items:center;gap:4px;letter-spacing:.01em}
.snip{background:var(--surface);border:1px solid var(--line-soft);border-radius:10px;padding:.45rem .55rem;display:flex;gap:.45rem;align-items:center}
.snip .k{width:24px;height:24px;border-radius:7px;background:var(--raised);display:grid;place-items:center;color:var(--ember);flex:none}
.snip .k svg{width:13px;height:13px;fill:currentColor}
.snip .t{font-size:.64rem;line-height:1.25;color:var(--ink);min-width:0}
.snip .t small{color:var(--ink-faint);font-size:.58rem}
.thumb{height:34px;border-radius:8px;background:var(--grad);opacity:.9}
.spark{position:absolute;left:calc(50% - 4px);top:50%;width:8px;height:8px;border-radius:50%;background:var(--ember);box-shadow:0 0 10px 3px var(--glow);z-index:3}
@media(prefers-reduced-motion:no-preference){.spark{animation:travel 2.6s cubic-bezier(.6,0,.4,1) infinite}}
@keyframes travel{
  0%{left:34%;opacity:0;transform:translateY(-50%) scale(.6)}
  18%{opacity:1;transform:translateY(-50%) scale(1)}
  82%{opacity:1}
  100%{left:64%;opacity:0;transform:translateY(-50%) scale(.6)}
}

/* section heads */
.band{background:var(--surface);border-block:1px solid var(--line-soft)}
.sec-head{max-width:60ch}
.sec-head h2{font-size:clamp(1.7rem,3.4vw,2.5rem);margin:.65rem 0 0}

/* ladder */
.ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:2.5rem}
.rung{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-m);padding:1.35rem;position:relative;overflow:hidden}
.rung .num{font-size:.7rem;font-weight:700;letter-spacing:.1em;color:var(--ink-faint);margin-top:.6rem;display:block}
.rung h3{font-size:1.12rem;margin:.7rem 0 .4rem;display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.rung p{font-size:.92rem;color:var(--ink-dim)}
.rung .ic{width:30px;height:30px;border-radius:9px;background:var(--raised);color:var(--ember);display:grid;place-items:center}
.rung .ic svg{width:17px;height:17px;fill:currentColor}
@media(max-width:760px){.ladder{grid-template-columns:1fr}}

/* features */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:2.5rem}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);padding:1.4rem;display:flex;flex-direction:column;gap:.6rem;transition:border-color .15s,box-shadow .15s,transform .15s}
.card:hover{border-color:var(--ink-faint);box-shadow:var(--shadow);transform:translateY(-2px)}
.card .ic{width:40px;height:40px;border-radius:11px;background:var(--raised);color:var(--ember);display:grid;place-items:center}
.card .ic svg{width:21px;height:21px;fill:currentColor}
.card h3{font-size:1.06rem}
.card p{font-size:.9rem;color:var(--ink-dim);line-height:1.5}
.card.feature-cloud{border-color:color-mix(in srgb,var(--ember) 42%,var(--line));background:linear-gradient(180deg,color-mix(in srgb,var(--ember) 6%,var(--surface)),var(--surface))}
.card.feature-cloud .ic{background:var(--grad);color:#fff}
.badge{align-self:flex-start;font-size:.66rem;font-weight:680;letter-spacing:.02em;color:var(--on-accent);background:var(--ember);padding:3px 9px;border-radius:999px}
.badge.mini{font-size:.58rem;padding:2px 7px}
@media(max-width:980px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.grid{grid-template-columns:1fr}}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-top:2.5rem}
.step{position:relative;padding-top:.4rem}
.step .n{width:36px;height:36px;border-radius:11px;background:var(--grad);color:#fff;font-weight:700;display:grid;place-items:center;font-size:1rem}
.step h3{font-size:1.1rem;margin:.85rem 0 .4rem}
.step p{font-size:.92rem;color:var(--ink-dim)}
@media(max-width:760px){.steps{grid-template-columns:1fr;gap:1.25rem}}

/* cloud callout */
.cloud{background:radial-gradient(120% 140% at 12% 0%,var(--glow),transparent 55%),var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);padding:clamp(1.75rem,4vw,3rem);display:grid;grid-template-columns:1.3fr 1fr;gap:2rem;align-items:center}
.cloud h2{font-size:clamp(1.55rem,3vw,2.2rem)}
.cloud p{color:var(--ink-dim);margin-top:.9rem;max-width:52ch}
.cloud .pills{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.25rem}
.pill{font-size:.8rem;font-weight:600;color:var(--ink);background:var(--raised);border:1px solid var(--line);padding:.4rem .8rem;border-radius:999px;display:inline-flex;align-items:center;gap:.4rem}
.pill .g{width:7px;height:7px;border-radius:50%;background:var(--live-dot)}
.cloud-art{display:grid;place-items:center}
.relay{width:100%;max-width:280px;aspect-ratio:1;position:relative;display:grid;place-items:center}
.relay .core{width:84px;height:84px;border-radius:24px;background:var(--grad);display:grid;place-items:center;box-shadow:0 12px 40px var(--glow)}
.relay .core svg{width:44px;height:44px;fill:#fff}
.relay .orb{position:absolute;width:46px;height:46px;border-radius:14px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);display:grid;place-items:center;color:var(--ink-dim)}
.relay .orb svg{width:22px;height:22px;fill:currentColor}
.relay .o1{top:6%;left:8%}.relay .o2{bottom:6%;right:8%}
.relay .ring{position:absolute;inset:14%;border:1.5px dashed var(--line);border-radius:50%}
@media(max-width:820px){.cloud{grid-template-columns:1fr}.cloud-art{order:-1}}

/* compare */
.table-scroll{overflow-x:auto;margin-top:2.25rem;border:1px solid var(--line);border-radius:var(--r-m);background:var(--surface)}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:.92rem}
th,td{padding:.85rem 1.05rem;text-align:left;border-bottom:1px solid var(--line-soft)}
thead th{font-size:.78rem;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-dim);font-weight:640}
thead th.us{color:var(--ember)}
tbody tr:last-child td{border-bottom:0}
td.feat{color:var(--ink-dim)}
.yes{color:var(--live);font-weight:640}
.no{color:var(--ink-faint)}
.col-us{background:color-mix(in srgb,var(--ember) 5%,transparent);font-weight:600}

/* faq */
.faq{display:grid;gap:.75rem;margin-top:2.25rem;max-width:760px}
details{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);padding:.25rem .35rem}
summary{cursor:pointer;list-style:none;padding:1rem 1.1rem;font-weight:600;display:flex;align-items:center;gap:.75rem}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";margin-left:auto;color:var(--ember);font-size:1.3rem;font-weight:400;line-height:1}
details[open] summary::after{content:"\2212"}
details p{padding:0 1.1rem 1.1rem;color:var(--ink-dim);font-size:.94rem}

/* footer */
footer{border-top:1px solid var(--line-soft);background:var(--surface)}
footer .wrap{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:2rem;padding-block:3rem}
.f-brand p{color:var(--ink-dim);font-size:.9rem;margin-top:.85rem;max-width:34ch}
.f-col h4{font-size:.76rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-faint);margin:0 0 .9rem}
.f-col a{display:block;color:var(--ink-dim);font-size:.92rem;padding:.28rem 0}
.f-col a:hover{color:var(--ember)}
.f-bottom{border-top:1px solid var(--line-soft)}
.f-bottom .wrap{display:flex;justify-content:space-between;gap:1rem;padding-block:1.25rem;font-size:.85rem;color:var(--ink-faint);flex-wrap:wrap}
@media(max-width:760px){footer .wrap{grid-template-columns:1fr 1fr}.f-brand{grid-column:1/-1}}

/* document pages (privacy) */
.doc{max-width:760px;margin-inline:auto;padding-block:clamp(2.5rem,6vw,4.5rem)}
.back-link{display:inline-flex;align-items:center;gap:.4rem;color:var(--ember);font-size:.9rem;font-weight:600;margin-bottom:1.75rem}
.doc h1{font-size:clamp(2rem,4vw,2.9rem);letter-spacing:-.03em;margin-bottom:.4rem}
.doc .updated{color:var(--ink-faint);font-size:.9rem;margin-bottom:2.5rem}
.doc h2{font-size:1.4rem;margin:2.25rem 0 .75rem}
.doc p,.doc li{color:var(--ink-dim);line-height:1.75}
.doc p{margin-bottom:1rem}
.doc ul{padding-left:1.35rem;margin-bottom:1rem;display:grid;gap:.4rem}
.doc a{color:var(--ember);font-weight:600}
.doc strong{color:var(--ink)}

/* 404 */
.notfound{min-height:72vh;display:grid;place-items:center;padding-block:clamp(3rem,8vw,6rem);position:relative;overflow:hidden}
.notfound::before{content:"";position:absolute;inset:-20% 40% auto -10%;height:420px;background:radial-gradient(50% 50% at 40% 40%,var(--glow),transparent 70%);pointer-events:none}
.notfound-panel{position:relative;z-index:1;width:min(640px,100%);text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);padding:clamp(2.25rem,5vw,3.25rem);box-shadow:var(--shadow-lg)}
.notfound .kicker{display:inline-flex;align-items:center;gap:.5rem;padding:.35rem .8rem;border-radius:999px;color:var(--ember);background:color-mix(in srgb,var(--ember) 10%,transparent);border:1px solid color-mix(in srgb,var(--ember) 22%,transparent);font-size:.82rem;font-weight:600;margin-bottom:1.35rem}
.notfound h1{font-size:clamp(2rem,5vw,3.1rem);letter-spacing:-.03em;line-height:1.08;margin-bottom:1rem}
.notfound p{max-width:44ch;margin:0 auto 1.6rem;color:var(--ink-dim)}
.notfound .path{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--ink);word-break:break-word}