/* ==========================================================================
   WhatsLayer — marketing design system
   Locked to WhatsLayer Brand Guidelines v1.0 (September 2026).
   Anchor: Swiss. White ground, hairline structure, one signal colour.
   Green is a signal, not a surface — it stays under 10% of any screen.
   ========================================================================== */

:root{
  /* brand */
  --green:#25D366; --teal:#128C7E; --forest:#075E54; --ink:#0B141A; --sky:#34B7F1;
  --bubble:#DCF8C6; --mint:#E7FBEF; --paper:#ECE5DD;
  /* neutrals — faint green-blue bias, never pure grey */
  --n0:#FFFFFF; --n50:#F5F7F6; --n100:#EEF2F0; --n200:#DDE3E0; --n300:#C9D1CD;
  --n400:#8696A0; --n500:#667781; --n700:#3B4A45; --n800:#1A252C; --n900:#0B141A;
  /* semantic */
  --ok:#25D366; --ok-ink:#128C7E; --warn:#F5A524; --warn-ink:#9A5B00;
  --err:#E5484D; --err-ink:#B3261E; --info:#34B7F1; --info-ink:#0B6E9E;
  /* gradients */
  --grad-brand:linear-gradient(90deg,#25D366,#128C7E);
  --grad-deep:linear-gradient(135deg,#25D366,#075E54);
  /* type */
  --disp:"Poppins","DM Sans",system-ui,sans-serif;
  --body:"DM Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  /* elevation — tinted ink, never black. Layered: a tight contact shadow for
     the edge, a wide soft one for the lift. */
  --e1:0 1px 1px rgba(11,20,26,.04),0 2px 6px -3px rgba(11,20,26,.08);
  --e2:0 1px 1px rgba(11,20,26,.04),0 3px 8px -4px rgba(11,20,26,.10),
       0 14px 32px -14px rgba(11,20,26,.16);
  --e3:0 1px 2px rgba(11,20,26,.05),0 8px 20px -10px rgba(11,20,26,.14),
       0 32px 64px -28px rgba(11,20,26,.28);
  --glow:0 1px 2px rgba(11,20,26,.10),0 8px 22px -10px rgba(37,211,102,.55);
  --hair:rgba(11,20,26,.09);
  --hair-2:rgba(11,20,26,.14);
  /* layout */
  --max:1200px; --gut:24px;
  --ease:cubic-bezier(.2,.8,.2,1);
  color-scheme:light;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--n0);color:var(--ink);
  font-family:var(--body);font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--disp);margin:0;text-wrap:balance}
p{margin:0}
a{color:var(--teal);text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:6px}
::selection{background:var(--bubble);color:var(--ink)}

/* Grid and flex children default to min-width:auto and refuse to shrink below
   their content's intrinsic width. Reset it or wide children force a scrollbar. */
.wrap>*,.grid>*,.row>*,.split>*{min-width:0}

/* --- doodle texture ------------------------------------------------------
   The WhatsApp wallpaper, borrowed on purpose (brand book 01: "we borrow
   WhatsApp's visual language"). Painted on its own layer so the page can
   dial the strength; content is lifted above it. */
.tex{position:relative;isolation:isolate}
.tex::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:url(/wl/doodle.svg) 0 0/400px 400px repeat;
  opacity:.03;
}
/* Fog is already a tint, so the pattern needs less to register. */
.sec.fog.tex::before{opacity:.026}
/* On ink grounds the strokes have to flip to read at all. */
.sec.ink.tex::before{filter:invert(1);opacity:.045}
/* Smaller tile on phones, or one repeat fills the screen and reads as
   scattered clip-art instead of texture. */
@media (max-width:640px){
  .tex::before{background-size:264px 264px}
}

/* --- layout ------------------------------------------------------------- */
.wrap{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:var(--gut)}
.sec{padding:96px 0;position:relative}
.sec.tight{padding:64px 0}
.sec.rule{border-top:1px solid var(--n200)}
.sec.fog{background:var(--n50)}
.sec.ink{background:var(--ink);color:#E9EDEF}
.sec.ink h1,.sec.ink h2,.sec.ink h3,.sec.ink h4{color:#fff}
.grid{display:grid;gap:var(--gut)}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* --- type scale (brand book 04) ----------------------------------------- */
.d-xl{font-family:var(--disp);font-weight:800;font-size:clamp(36px,6.6vw,62px);
  line-height:1.02;letter-spacing:-.038em}
.d-l{font-family:var(--disp);font-weight:700;font-size:clamp(29px,4.6vw,44px);
  line-height:1.08;letter-spacing:-.028em}
.d-m{font-family:var(--disp);font-weight:700;font-size:clamp(23px,3vw,29px);
  line-height:1.18;letter-spacing:-.02em}
.d-s{font-family:var(--disp);font-weight:600;font-size:20px;line-height:1.3}
.lede{font-size:clamp(17px,2.1vw,19px);line-height:1.55;color:var(--n700);max-width:62ch}
.body-m{font-size:16px;line-height:1.62;color:var(--n700)}
.body-s{font-size:14.5px;line-height:1.55;color:var(--n700)}
.eyebrow{font-family:var(--mono);font-weight:500;font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--teal)}
.sec.ink .eyebrow{color:var(--green)}
.mono{font-family:var(--mono);font-weight:500;font-variant-numeric:tabular-nums}
.muted{color:var(--n500)}
.sec.ink .muted{color:#8696A0}
.num{font-variant-numeric:tabular-nums}

/* --- buttons (brand book 06) -------------------------------------------- */
.btn{
  font-family:var(--body);font-weight:600;font-size:15px;line-height:1;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:10px;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;text-decoration:none;
  transition:background .1s var(--ease),border-color .1s var(--ease),color .1s var(--ease),
    box-shadow .15s var(--ease),transform .1s var(--ease);
}
.btn.pri{background:var(--green);color:var(--ink);box-shadow:var(--glow)}
.btn.pri:hover{background:#1FBF5B;box-shadow:0 1px 2px rgba(11,20,26,.12),0 10px 26px -10px rgba(37,211,102,.62)}
.btn.pri:active{background:#1AAE52;box-shadow:var(--e1);transform:translateY(1px)}
.btn.alt{background:var(--n0);border-color:var(--hair-2);color:var(--ink);box-shadow:var(--e1)}
.btn.alt:hover{background:var(--n50);border-color:var(--n300)}
.btn.alt:active{transform:translateY(1px)}
.sec.ink .btn.alt{border-color:#2F3F47;color:#E9EDEF}
.sec.ink .btn.alt:hover{background:#1A252C}
.btn.ghost{background:transparent;color:var(--teal);padding:0 4px;height:auto}
.btn.ghost:hover{text-decoration:underline}
.btn.m{height:40px;font-size:14px;padding:0 16px}
.btn.l{height:52px;font-size:16px;padding:0 26px}
.btn.block{width:100%}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* --- pills / status ------------------------------------------------------ */
.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1.5}
.pill::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}
.pill.ok{background:var(--mint);color:var(--ok-ink)}
.pill.warn{background:#FFF4DE;color:var(--warn-ink)}
.pill.err{background:#FDECEC;color:var(--err-ink)}
.pill.info{background:#E3F4FC;color:var(--info-ink)}
.pill.neu{background:var(--n100);color:var(--n700)}
.pill.plain::before{display:none}

/* --- cards --------------------------------------------------------------- */
.card{background:var(--n0);border:1px solid var(--hair);border-radius:18px;padding:26px;
  box-shadow:var(--e1)}
.card.pad-s{padding:18px}
.card.raise{box-shadow:var(--e2)}
.sec.ink .card{background:linear-gradient(180deg,#141F26,#111B21);border-color:#25333B;
  color:#B5C0C4;box-shadow:0 1px 1px rgba(0,0,0,.3),0 14px 34px -18px rgba(0,0,0,.7)}
.sec.fog .card{background:var(--n0)}

/* --- nav ----------------------------------------------------------------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.88);
  backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);
  border-bottom:1px solid var(--n200)}
.nav-in{display:flex;align-items:center;gap:28px;height:68px}
.nav .mark{width:132px;flex:none;display:block}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-links a{font-size:14.5px;font-weight:500;color:var(--n700);padding:8px 12px;border-radius:8px}
.nav-links a:hover{background:var(--n50);color:var(--ink)}
.nav-links a[aria-current="page"]{color:var(--ink);font-weight:600}
.nav-end{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-end .signin{font-size:14.5px;font-weight:500;color:var(--n700);padding:8px 10px}
.nav-end .signin:hover{color:var(--ink)}
.burger{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--n200);
  border-radius:10px;background:var(--n0);align-items:center;justify-content:center;cursor:pointer}
.burger span{display:block;width:18px;height:1.5px;background:var(--ink);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;
  height:1.5px;background:var(--ink);transition:transform .2s var(--ease),top .2s var(--ease)}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.burger[aria-expanded="true"] span{background:transparent}
.burger[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.burger[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}
/* 69px = the nav's 68px row plus its 1px bottom rule, so the sheet starts clear of it. */
.sheet{display:none;position:fixed;inset:69px 0 0;z-index:59;background:var(--n0);
  padding:20px var(--gut) 32px;overflow-y:auto;flex-direction:column;gap:6px}
.sheet.open{display:flex}
.sheet a.item{font-family:var(--disp);font-weight:600;font-size:21px;color:var(--ink);
  padding:15px 0;border-bottom:1px solid var(--n100);display:flex;justify-content:space-between;
  align-items:center}
.sheet a.item .sub{font-family:var(--body);font-weight:400;font-size:13.5px;color:var(--n500);
  display:block;margin-top:2px}
.sheet .arrow{color:var(--n300);flex:none;margin-left:16px}
.sheet .sheet-cta{margin-top:20px;display:grid;gap:10px}
body.locked{overflow:hidden}

/* --- footer -------------------------------------------------------------- */
.foot{background:var(--ink);color:#8696A0;padding:72px 0 32px;font-size:14.5px}
.foot a{color:#B5C0C4}
.foot a:hover{color:#fff}
.foot-top{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:40px var(--gut);
  padding-bottom:48px;border-bottom:1px solid #243239}
.foot .mark{width:150px;margin-bottom:16px;display:block}
.foot h4{font-family:var(--body);font-weight:600;font-size:12px;letter-spacing:.1em;
  text-transform:uppercase;color:#fff;margin-bottom:14px}
.foot ul{display:grid;gap:9px}
.foot-bot{padding-top:24px;display:flex;flex-wrap:wrap;gap:14px 28px;
  align-items:center;justify-content:space-between;font-size:13px}
.disclaimer{max-width:64ch;line-height:1.55;color:#667781;font-size:13px}

/* --- chat rendering (brand book 06 — mirrors WhatsApp exactly) ------------ */
.chat{background:var(--paper);border-radius:14px;padding:16px;display:grid;gap:8px;
  position:relative;overflow:hidden;isolation:isolate}
/* The wallpaper itself. Absolute, so it never becomes a grid item. */
.chat::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:url(/wl/doodle.svg) 0 0/300px 300px repeat;opacity:.075}
.msg{position:relative;max-width:82%;padding:8px 11px 6px;border-radius:10px;
  font-size:14.5px;line-height:1.42;color:var(--ink);box-shadow:0 1px 1px rgba(0,0,0,.08)}
.msg.in{background:#fff;border-top-left-radius:2px;justify-self:start}
.msg.out{background:var(--bubble);border-top-right-radius:2px;justify-self:end}
.msg .meta{display:flex;align-items:center;justify-content:flex-end;gap:4px;
  font-size:10.5px;color:var(--n500);margin-top:3px}
.msg .tpl{font-family:var(--mono);font-size:9.5px;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--teal);margin-bottom:4px}
.msg .qr{display:grid;margin:8px -11px -6px}
.msg .qr span{color:var(--info-ink);text-align:center;font-weight:600;font-size:13.5px;
  padding:8px 4px;border-top:1px solid rgba(0,0,0,.08)}
.tick{display:inline-block;width:15px;height:9px;flex:none}
.tick.read{color:var(--sky)}
.tick.sent{color:var(--n400)}
.typing{display:inline-flex;gap:3px;align-items:center;padding:3px 0}
.typing i{width:5px;height:5px;border-radius:50%;background:var(--n400);display:block;
  animation:blip 1.2s infinite var(--ease)}
.typing i:nth-child(2){animation-delay:.15s}
.typing i:nth-child(3){animation-delay:.3s}
@keyframes blip{0%,60%,100%{opacity:.3}30%{opacity:1}}

/* --- product UI rendering -------------------------------------------------- */
.ui{border:1px solid var(--n200);border-radius:16px;overflow:hidden;background:var(--n0);
  box-shadow:var(--e2);font-size:13px}
.ui-bar{display:flex;align-items:center;gap:8px;padding:11px 14px;background:var(--n50);
  border-bottom:1px solid var(--n200)}
.ui-bar .dot{width:9px;height:9px;border-radius:50%;background:var(--n300);flex:none}
.ui-bar .t{font-family:var(--body);font-weight:600;font-size:12.5px;color:var(--n700);margin-left:6px}
.ui-body{display:grid;grid-template-columns:172px minmax(0,1fr);min-height:300px}
.ui-side{background:var(--n50);border-right:1px solid var(--n200);padding:12px;display:grid;
  gap:2px;align-content:start}
.ui-side a{display:flex;align-items:center;gap:9px;padding:7px 10px;border-radius:8px;
  color:var(--n700);font-weight:500;font-size:12.5px}
.ui-side a.on{background:var(--mint);color:var(--ok-ink);font-weight:600}
.ui-side a .c{margin-left:auto;font-family:var(--mono);font-size:10.5px;color:var(--n500)}
.ui-main{padding:16px;display:grid;gap:14px;align-content:start;min-width:0}
.ui-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.ui-head h4{font-size:15px;font-weight:600}
.ui-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.ui-stat{border:1px solid var(--n200);border-radius:10px;padding:11px 12px;display:grid;gap:3px}
.ui-stat .v{font-family:var(--disp);font-weight:700;font-size:19px;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;line-height:1.1}
.ui-stat .k{font-size:10.5px;color:var(--n500);font-weight:600;letter-spacing:.06em;
  text-transform:uppercase}
.ui-stat .d{font-size:11px;color:var(--ok-ink);font-weight:600}
.ui table{width:100%;border-collapse:collapse}
.ui th{text-align:left;font-family:var(--mono);font-size:10px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--n500);font-weight:500;padding:8px 10px;
  border-bottom:1px solid var(--n200)}
.ui td{padding:9px 10px;border-bottom:1px solid var(--n100);font-size:12.5px;
  color:var(--n700);vertical-align:middle}
.ui td b{color:var(--ink);font-weight:600}
.ui td .mono{font-size:11.5px;color:var(--n500)}

/* --- stat block ------------------------------------------------------------ */
.stat{display:grid;gap:5px}
.stat .v{font-family:var(--disp);font-weight:800;font-size:clamp(30px,4.4vw,42px);
  letter-spacing:-.03em;line-height:1;font-variant-numeric:tabular-nums}
.stat .k{font-size:13.5px;color:var(--n500);line-height:1.45}

/* --- tick list -------------------------------------------------------------- */
.ticks{display:grid;gap:11px}
.ticks li{display:flex;gap:11px;font-size:15.5px;line-height:1.5;color:var(--n700)}
.ticks li b{color:var(--ink);font-weight:600}
.ticks li>svg{flex:none;margin-top:4px;color:var(--green)}

/* --- accordion --------------------------------------------------------------- */
.acc{border-top:1px solid var(--n200)}
.acc details{border-bottom:1px solid var(--n200)}
.acc summary{list-style:none;cursor:pointer;padding:22px 44px 22px 0;position:relative;
  font-family:var(--disp);font-weight:600;font-size:17.5px;line-height:1.4;color:var(--ink)}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{content:"";position:absolute;right:8px;top:29px;width:11px;height:11px;
  border-right:1.5px solid var(--n400);border-bottom:1.5px solid var(--n400);
  transform:rotate(45deg);transition:transform .2s var(--ease)}
.acc details[open] summary::after{transform:rotate(-135deg)}
.acc summary:hover{color:var(--teal)}
.acc .ans{padding:0 48px 24px 0;color:var(--n700);font-size:15.5px;line-height:1.62}
.acc .ans p+p{margin-top:11px}

/* --- comparison table ---------------------------------------------------------- */
.cmp-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;
  border:1px solid var(--n200);border-radius:16px;background:var(--n0)}
table.cmp{width:100%;border-collapse:collapse;min-width:660px;font-size:14.5px}
table.cmp th,table.cmp td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--n100)}
table.cmp thead th{background:var(--n50);font-family:var(--body);font-weight:600;font-size:13px;
  color:var(--n700);border-bottom:1px solid var(--n200)}
table.cmp tbody th{font-weight:500;color:var(--n700);font-size:14.5px}
table.cmp td{text-align:center;font-variant-numeric:tabular-nums;color:var(--ink)}
table.cmp td.no{color:var(--n300)}
table.cmp tr:last-child th,table.cmp tr:last-child td{border-bottom:0}
table.cmp .grp th{background:var(--n50);font-family:var(--mono);font-size:10.5px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--n500);font-weight:500;padding:11px 18px}

/* --- mobile action bar ------------------------------------------------------------
   Phones get a persistent bottom action bar, the way an app does. Hidden until
   the visitor is past the hero, and never shown on desktop. */
.appbar{display:none}
@media (max-width:860px){
  .appbar{
    display:block;position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:rgba(255,255,255,.92);
    backdrop-filter:saturate(1.8) blur(16px);-webkit-backdrop-filter:saturate(1.8) blur(16px);
    border-top:1px solid var(--hair);
    padding:10px var(--gut) calc(10px + env(safe-area-inset-bottom,0px));
    transform:translateY(120%);transition:transform .3s var(--ease);
    box-shadow:0 -8px 28px -14px rgba(11,20,26,.28);
  }
  .appbar.on{transform:none}
  .appbar-in{display:flex;align-items:center;gap:14px;max-width:var(--max);margin-inline:auto}
  .appbar-txt{min-width:0;flex:1}
  .appbar-txt b{display:block;font-family:var(--disp);font-weight:600;font-size:14.5px;
    line-height:1.25;color:var(--ink)}
  .appbar-txt span{font-size:12.5px;color:var(--n500)}
  .appbar .btn{width:auto;flex:none;height:44px;padding:0 20px}
  /* Keep the footer clear of the bar. */
  body.has-appbar .foot{padding-bottom:calc(88px + env(safe-area-inset-bottom,0px))}
}

/* --- reveal (brand book 11 — fade + 12px rise, 60ms stagger) --------------------- */
.rev{opacity:0;transform:translateY(12px);
  transition:opacity .6s var(--ease),transform .6s var(--ease)}
.rev.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .rev{transition:opacity .2s linear;transform:none}
  .typing i{animation:none;opacity:.6}
}

/* --- responsive ------------------------------------------------------------------ */
@media (max-width:1000px){
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-top{grid-template-columns:1fr 1fr;gap:36px var(--gut)}
}
@media (max-width:860px){
  .nav-links,.nav-end .signin,.nav-end .btn.alt{display:none}
  .burger{display:flex}
  .nav-end{margin-left:12px}
  .g2,.g3{grid-template-columns:1fr}
  .sec{padding:64px 0}
  .sec.tight{padding:48px 0}
  .ui-body{grid-template-columns:1fr}
  .ui-side{display:none}
  .ui-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:560px){
  :root{--gut:18px}
  body{font-size:16px}
  .sec{padding:52px 0}
  .g4{grid-template-columns:1fr}
  .foot{padding:52px 0 28px}
  .foot-top{grid-template-columns:1fr;gap:32px}
  .btn{width:100%;height:52px;font-size:16px;border-radius:12px}
  .btn.auto{width:auto;height:40px;font-size:14px;border-radius:10px}
  .acc summary{font-size:16.5px;padding:19px 40px 19px 0}
  .acc .ans{font-size:15px;padding-right:8px}
  /* App-like surfaces: softer corners, more lift, roomier taps. */
  .card,.ui,.chat{border-radius:20px}
  .card{padding:22px;box-shadow:var(--e2)}
  .sheet a.item{padding:17px 0}
  .nav-in{height:64px}
  .sheet{inset:65px 0 0}
}