/* ==========================================================================
   Jili Evo - mobile-first visuals
   File   : css/mobile-483102-visuals.css
   Prefix : surface83102-
   Canvas : 430px phone frame (scales down to 320px), centered on wide screens
   Palette: #0D1117 ink / #40E0D0 tide / #C0C0C0 silver / #A9A9A9 mist
   Voice  : mono accents over a calm sans body, small-medium radii,
            grouped cover cards, restrained fade feedback
   ========================================================================== */

:root{
  --surface83102-ink:#0D1117;
  --surface83102-ink-2:#111823;
  --surface83102-panel:#161f2c;
  --surface83102-panel-2:#1b2634;
  --surface83102-line:#28344a;
  --surface83102-line-soft:rgba(192,192,192,.16);
  --surface83102-tide:#40E0D0;
  --surface83102-tide-deep:#1d8f85;
  --surface83102-tide-soft:rgba(64,224,208,.12);
  --surface83102-silver:#C0C0C0;
  --surface83102-mist:#A9A9A9;
  --surface83102-warn:#e8896f;
  --surface83102-sans:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  --surface83102-mono:"SFMono-Regular",Consolas,"Roboto Mono","Liberation Mono","Courier New",monospace;
  --surface83102-r-s:10px;
  --surface83102-r-m:14px;
  --surface83102-r-l:18px;
  --surface83102-canvas:430px; /* hard phone-canvas width: 430px */
  --surface83102-top-h:104px;
  --surface83102-nav-h:64px;
}

*{box-sizing:border-box;margin:0;padding:0}

html{-webkit-text-size-adjust:100%}

body{
  background:var(--surface83102-ink);
  color:var(--surface83102-silver);
  font-family:var(--surface83102-sans);
  font-size:15px;
  line-height:1.62;
  min-height:100vh;
  overscroll-behavior-y:none;
}

img{display:block;max-width:100%;border:0}

button{font-family:inherit;color:inherit;background:none;border:0;cursor:pointer}

a{color:var(--surface83102-tide);text-decoration:none}

::selection{background:rgba(64,224,208,.32);color:#fff}

:focus-visible{outline:2px solid var(--surface83102-tide);outline-offset:2px;border-radius:4px}

/* ---- skip link ---------------------------------------------------------- */
.surface83102-skip{
  position:absolute;left:8px;top:-48px;z-index:120;
  background:var(--surface83102-tide);color:var(--surface83102-ink);
  font-family:var(--surface83102-mono);font-size:12px;
  padding:8px 14px;border-radius:var(--surface83102-r-s);transition:top .2s ease;
}
.surface83102-skip:focus{top:8px}

/* ---- wide-screen framing: keep the phone canvas, dim the sides ---------- */
@media (min-width:520px){
  body{
    background:
      radial-gradient(1200px 600px at 50% -10%,rgba(64,224,208,.06),transparent 60%),
      #080c12;
  }
  .surface83102-frame{
    max-width:var(--surface83102-canvas);
    margin:0 auto;min-height:100vh;position:relative;
    background:var(--surface83102-ink);
    border-left:1px solid var(--surface83102-line);
    border-right:1px solid var(--surface83102-line);
    box-shadow:0 0 44px rgba(0,0,0,.55);
  }
}

/* ==========================================================================
   Fixed top navigation - two layers: brand strip + action strip
   ========================================================================== */
.surface83102-topbar{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(13,17,23,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--surface83102-line);
}
.surface83102-topbar-in{max-width:var(--surface83102-canvas);margin:0 auto}

/* brand layer: logo tile + wordmark only */
.surface83102-brandrow{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px 7px;
}
.surface83102-brand{display:flex;align-items:center;gap:10px;min-height:44px}
.surface83102-brand-tile{
  width:38px;height:38px;flex:0 0 38px;
  display:grid;place-items:center;
  border-radius:11px;
  background:linear-gradient(150deg,#1c2836,#101822);
  border:1px solid rgba(64,224,208,.4);
  box-shadow:inset 0 0 0 1px rgba(13,17,23,.7);
}
.surface83102-brand-tile img{width:28px;height:28px;border-radius:6px}
.surface83102-brand-name{
  font-size:19px;font-weight:700;letter-spacing:.4px;color:#e8edf3;
}
.surface83102-brand-name em{
  font-style:normal;font-family:var(--surface83102-mono);
  font-size:16px;color:var(--surface83102-tide);letter-spacing:1.5px;
}

/* action layer: register / login / layered menu trigger */
.surface83102-actionrow{
  display:grid;grid-template-columns:1fr 1fr auto;gap:8px;
  padding:0 12px 10px;
}
.surface83102-cta{
  min-height:44px;border-radius:var(--surface83102-r-s);
  font-size:14px;font-weight:700;letter-spacing:.4px;
  display:flex;align-items:center;justify-content:center;gap:6px;
  transition:box-shadow .18s ease,transform .18s ease,background .18s ease;
}
.surface83102-cta:active{transform:scale(.97)}
.surface83102-cta-solid{
  background:linear-gradient(160deg,#55ead9,#2fb3a5);
  color:var(--surface83102-ink);
  box-shadow:0 4px 16px rgba(64,224,208,.28);
}
.surface83102-cta-solid:hover{box-shadow:0 6px 22px rgba(64,224,208,.45)}
.surface83102-cta-line{
  border:1px solid rgba(192,192,192,.4);color:var(--surface83102-silver);
}
.surface83102-cta-line:hover{border-color:var(--surface83102-tide);color:var(--surface83102-tide)}
.surface83102-menubtn{
  min-height:44px;min-width:52px;padding:0 12px;
  border:1px solid var(--surface83102-line);border-radius:var(--surface83102-r-s);
  display:flex;align-items:center;gap:7px;
  font-family:var(--surface83102-mono);font-size:12px;color:var(--surface83102-mist);
}
.surface83102-menubtn:hover{color:var(--surface83102-tide);border-color:var(--surface83102-tide)}
.surface83102-menubtn-bars{
  width:16px;height:12px;position:relative;flex:0 0 16px;
}
.surface83102-menubtn-bars::before,
.surface83102-menubtn-bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;border-radius:2px;
  background:currentColor;transition:transform .22s ease,top .22s ease;
}
.surface83102-menubtn-bars::before{top:1px;box-shadow:0 5px 0 currentColor}
.surface83102-menubtn-bars::after{top:9px}
.surface83102-menu-on .surface83102-menubtn{color:var(--surface83102-tide);border-color:var(--surface83102-tide)}
.surface83102-menu-on .surface83102-menubtn-bars::before{top:5px;transform:rotate(45deg);box-shadow:none}
.surface83102-menu-on .surface83102-menubtn-bars::after{top:5px;transform:rotate(-45deg)}

/* layered dropdown menu */
.surface83102-drawer{
  max-width:var(--surface83102-canvas);margin:0 auto;
  max-height:0;overflow:hidden;
  transition:max-height .3s ease;
  background:var(--surface83102-ink-2);
}
.surface83102-menu-on .surface83102-drawer{max-height:calc(100vh - 108px);overflow-y:auto}
.surface83102-drawer-group{padding:10px 12px 4px;border-top:1px solid rgba(40,52,74,.6)}
.surface83102-drawer-tag{
  font-family:var(--surface83102-mono);font-size:10px;letter-spacing:2px;
  text-transform:uppercase;color:var(--surface83102-tide);
  padding:2px 0 6px 10px;position:relative;
}
.surface83102-drawer-tag::before{
  content:"";position:absolute;left:0;top:4px;bottom:6px;width:2px;
  border-radius:2px;background:var(--surface83102-tide);opacity:.7;
}
.surface83102-drawer-link{
  display:flex;align-items:center;min-height:44px;
  padding:0 10px;margin:0 0 4px;border-radius:8px;
  color:var(--surface83102-silver);font-size:14px;
  border:1px solid transparent;
}
.surface83102-drawer-link:hover{
  background:var(--surface83102-tide-soft);
  border-color:rgba(64,224,208,.35);color:#fff;
}

/* ==========================================================================
   Main shell
   ========================================================================== */
.surface83102-shell{
  max-width:var(--surface83102-canvas);margin:0 auto;
  padding:calc(var(--surface83102-top-h) + 14px) 14px
          calc(var(--surface83102-nav-h) + 30px + env(safe-area-inset-bottom));
}

/* ==========================================================================
   Hero
   ========================================================================== */
.surface83102-hero{padding:6px 0 18px}
.surface83102-hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--surface83102-mono);font-size:11px;letter-spacing:2px;
  color:var(--surface83102-tide);text-transform:uppercase;
  padding:5px 12px;border:1px solid rgba(64,224,208,.35);border-radius:999px;
  background:var(--surface83102-tide-soft);
}
.surface83102-hero-title{
  font-size:26px;line-height:1.24;font-weight:800;color:#eef3f8;
  letter-spacing:.2px;margin:14px 0 10px;
}
.surface83102-hero-title em{font-style:normal;color:var(--surface83102-tide)}
.surface83102-hero-lead{font-size:14.5px;color:var(--surface83102-mist)}
.surface83102-hero-lead strong{color:var(--surface83102-silver);font-weight:600}
.surface83102-hero-ctas{
  display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0 0;
}
.surface83102-hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:16px;
}
.surface83102-stat{
  border:1px solid var(--surface83102-line);border-radius:var(--surface83102-r-s);
  background:var(--surface83102-panel);padding:9px 6px;text-align:center;
}
.surface83102-stat-num{
  display:block;font-family:var(--surface83102-mono);font-size:15px;
  color:var(--surface83102-tide);font-weight:700;
}
.surface83102-stat-lab{
  display:block;font-size:10.5px;color:var(--surface83102-mist);
  letter-spacing:.6px;text-transform:uppercase;
}

/* ==========================================================================
   Banner carousel
   ========================================================================== */
.surface83102-carousel{position:relative;margin:4px 0 6px}
.surface83102-cstrip{position:relative;border-radius:var(--surface83102-r-l);overflow:hidden;border:1px solid var(--surface83102-line)}
.surface83102-cslide{
  position:relative;display:block;width:100%;
  aspect-ratio:16/9;cursor:pointer;
  opacity:0;transition:opacity .5s ease;
  position:absolute;inset:0;
}
.surface83102-cslide:first-child{position:relative}
.surface83102-cslide-on{opacity:1;z-index:2}
.surface83102-cslide img{width:100%;height:100%;object-fit:cover}
.surface83102-cslide-cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:26px 14px 12px;
  background:linear-gradient(180deg,transparent,rgba(8,12,18,.92));
  font-size:13px;color:#e8edf3;text-align:left;
}
.surface83102-cslide-cap b{color:var(--surface83102-tide);font-family:var(--surface83102-mono);font-size:12px;letter-spacing:1px}
.surface83102-cdots{
  display:flex;justify-content:center;gap:7px;margin-top:9px;
}
.surface83102-cdot{
  width:22px;height:5px;border-radius:4px;
  background:var(--surface83102-line);transition:background .25s ease,width .25s ease;
}
.surface83102-cdot:hover{background:var(--surface83102-mist)}
.surface83102-cdot-on{background:var(--surface83102-tide);width:30px}

/* ==========================================================================
   Section frame (game shelves + content modules)
   ========================================================================== */
.surface83102-sect{margin:26px 0 0}
.surface83102-sect-head{margin-bottom:10px}
.surface83102-sect-kicker{
  font-family:var(--surface83102-mono);font-size:10.5px;letter-spacing:2.2px;
  color:var(--surface83102-tide);text-transform:uppercase;
}
.surface83102-sect-row{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap;margin-top:3px}
.surface83102-sect-title{
  font-size:19px;line-height:1.3;font-weight:800;color:#eef3f8;flex:1 1 auto;
}
.surface83102-sect-count{
  font-family:var(--surface83102-mono);font-size:10px;letter-spacing:1px;
  color:var(--surface83102-mist);border:1px solid var(--surface83102-line);
  border-radius:999px;padding:3px 9px;white-space:nowrap;
}
.surface83102-sect-note{font-size:13.5px;color:var(--surface83102-mist);margin-top:6px}
.surface83102-sect-note a{text-decoration:underline;text-underline-offset:3px}

/* ==========================================================================
   Game grid - grouped cover cards
   ========================================================================== */
.surface83102-ggrid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:10px 8px;margin-top:12px;
}
@media (min-width:380px){
  .surface83102-ggrid{grid-template-columns:repeat(5,1fr);gap:12px 10px}
}
.surface83102-game{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  border-radius:var(--surface83102-r-s);padding:0;min-width:0;
  transition:transform .16s ease;
}
.surface83102-game:active{transform:scale(.94)}
.surface83102-game-art{
  width:100%;aspect-ratio:1/1;border-radius:var(--surface83102-r-s);
  overflow:hidden;border:1px solid var(--surface83102-line-soft);
  background:var(--surface83102-panel);
  display:grid;place-items:center;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.surface83102-game-art img{width:100%;height:100%;object-fit:cover}
.surface83102-game:hover .surface83102-game-art{
  border-color:rgba(64,224,208,.75);
  box-shadow:0 0 14px rgba(64,224,208,.28);
}
.surface83102-game-txt{
  font-size:10.8px;line-height:1.3;color:var(--surface83102-mist);text-align:center;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  overflow-wrap:break-word;word-break:break-word;min-height:2.6em;
}
.surface83102-game:hover .surface83102-game-txt{color:var(--surface83102-silver)}

/* ==========================================================================
   Module: tricks (numbered rail list)
   ========================================================================== */
.surface83102-trix{
  border:1px solid var(--surface83102-line);border-radius:var(--surface83102-r-m);
  background:var(--surface83102-panel);padding:14px;
}
.surface83102-lead{font-size:14px;color:var(--surface83102-silver);margin-bottom:12px}
.surface83102-lead strong{color:#fff}
.surface83102-trix-list{list-style:none;display:grid;gap:10px}
.surface83102-trix-item{
  display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:start;
  padding:8px 8px 8px 0;border-left:2px solid rgba(64,224,208,.35);
}
.surface83102-trix-num{
  font-family:var(--surface83102-mono);font-size:12px;font-weight:700;
  color:var(--surface83102-tide);border:1px solid rgba(64,224,208,.4);
  border-radius:8px;width:34px;height:34px;display:grid;place-items:center;
  background:var(--surface83102-tide-soft);
}
.surface83102-trix-item p{font-size:13.5px;color:var(--surface83102-mist)}
.surface83102-trix-item p strong{color:var(--surface83102-silver)}

/* ==========================================================================
   Module: step flow (connected nodes)
   ========================================================================== */
.surface83102-flow{list-style:none;position:relative;display:grid;gap:0;margin-top:4px}
.surface83102-flow::before{
  content:"";position:absolute;left:17px;top:14px;bottom:14px;width:2px;
  background:linear-gradient(180deg,var(--surface83102-tide),rgba(64,224,208,.15));
  border-radius:2px;
}
.surface83102-flow-item{
  position:relative;display:grid;grid-template-columns:36px 1fr;gap:12px;
  padding:0 0 16px;
}
.surface83102-flow-item:last-child{padding-bottom:2px}
.surface83102-flow-num{
  position:relative;z-index:2;width:36px;height:36px;border-radius:50%;
  display:grid;place-items:center;
  font-family:var(--surface83102-mono);font-size:13px;font-weight:700;color:var(--surface83102-tide);
  background:var(--surface83102-ink);border:1px solid rgba(64,224,208,.5);
}
.surface83102-flow-body h3{font-size:14px;color:#eef3f8;font-weight:700;margin:2px 0 3px}
.surface83102-flow-body p{font-size:13.5px;color:var(--surface83102-mist)}

/* ==========================================================================
   Module: play-style lanes (stacked compare rows)
   ========================================================================== */
.surface83102-lanes{display:grid;gap:10px;margin-top:4px}
.surface83102-lane{
  display:grid;gap:6px;padding:12px;
  border:1px solid var(--surface83102-line);border-radius:var(--surface83102-r-m);
  background:var(--surface83102-panel);
}
.surface83102-lane-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.surface83102-lane-tag{
  font-family:var(--surface83102-mono);font-size:10px;letter-spacing:1.6px;
  color:var(--surface83102-ink);background:var(--surface83102-tide);
  border-radius:6px;padding:2px 8px;font-weight:700;
}
.surface83102-lane-head h3{font-size:14.5px;color:#eef3f8;font-weight:700;flex:1}
.surface83102-lane p{font-size:13.2px;color:var(--surface83102-mist)}
.surface83102-lane p b{color:var(--surface83102-silver);font-weight:600}

/* ==========================================================================
   Module: download panel
   ========================================================================== */
.surface83102-dlpanel{
  border:1px solid rgba(64,224,208,.3);border-radius:var(--surface83102-r-l);
  background:linear-gradient(170deg,rgba(64,224,208,.07),var(--surface83102-panel) 55%);
  overflow:hidden;
}
.surface83102-dlpanel-media{position:relative}
.surface83102-dlpanel-media img{width:100%;aspect-ratio:16/8;object-fit:cover}
.surface83102-dlpanel-media::after{
  content:"APP PREVIEW";position:absolute;top:10px;left:10px;
  font-family:var(--surface83102-mono);font-size:9.5px;letter-spacing:2px;
  color:var(--surface83102-tide);background:rgba(13,17,23,.8);
  border:1px solid rgba(64,224,208,.4);border-radius:6px;padding:3px 8px;
}
.surface83102-dlpanel-body{padding:14px}
.surface83102-dl-chips{display:flex;flex-wrap:wrap;gap:7px;margin:12px 0}
.surface83102-chip{
  font-family:var(--surface83102-mono);font-size:10.5px;letter-spacing:.8px;
  color:var(--surface83102-silver);border:1px solid var(--surface83102-line);
  background:var(--surface83102-ink-2);border-radius:999px;padding:5px 11px;
}
.surface83102-dl-cta{
  width:100%;min-height:48px;margin-top:4px;
  border-radius:var(--surface83102-r-s);
  background:linear-gradient(160deg,#55ead9,#2fb3a5);color:var(--surface83102-ink);
  font-weight:800;font-size:15px;letter-spacing:.4px;
  display:flex;align-items:center;justify-content:center;gap:8px;
  box-shadow:0 5px 18px rgba(64,224,208,.3);
  transition:box-shadow .18s ease,transform .18s ease;
}
.surface83102-dl-cta:active{transform:scale(.98)}

/* ==========================================================================
   Module: use-case cards
   ========================================================================== */
.surface83102-cases{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:4px}
.surface83102-case{
  border:1px solid var(--surface83102-line);border-radius:var(--surface83102-r-m);
  background:var(--surface83102-panel);padding:12px;
  display:grid;gap:7px;align-content:start;
}
.surface83102-case-tag{
  font-family:var(--surface83102-mono);font-size:10px;letter-spacing:1.6px;
  color:var(--surface83102-tide);text-transform:uppercase;
}
.surface83102-case h3{font-size:13.5px;color:#eef3f8;font-weight:700;line-height:1.35}
.surface83102-case p{font-size:12.5px;color:var(--surface83102-mist);line-height:1.5}

/* ==========================================================================
   Module: pros / limits ledger
   ========================================================================== */
.surface83102-ledger{display:grid;gap:10px;margin-top:4px}
.surface83102-ledger-col{
  border-radius:var(--surface83102-r-m);padding:13px 14px;
  border:1px solid var(--surface83102-line);background:var(--surface83102-panel);
}
.surface83102-ledger-good{border-left:3px solid var(--surface83102-tide)}
.surface83102-ledger-bad{border-left:3px solid var(--surface83102-warn)}
.surface83102-ledger-h{
  font-family:var(--surface83102-mono);font-size:11px;letter-spacing:2px;
  text-transform:uppercase;margin-bottom:9px;
}
.surface83102-ledger-good .surface83102-ledger-h{color:var(--surface83102-tide)}
.surface83102-ledger-bad .surface83102-ledger-h{color:var(--surface83102-warn)}
.surface83102-ledger-ul{list-style:none;display:grid;gap:8px}
.surface83102-ledger-li{
  position:relative;padding-left:18px;font-size:13.2px;color:var(--surface83102-mist);
}
.surface83102-ledger-li::before{
  position:absolute;left:0;top:0;font-family:var(--surface83102-mono);font-weight:700;
}
.surface83102-ledger-good .surface83102-ledger-li::before{content:"+";color:var(--surface83102-tide)}
.surface83102-ledger-bad .surface83102-ledger-li::before{content:"–";color:var(--surface83102-warn)}

/* ==========================================================================
   Extended footer: brand > two-column directory > promotions > disclaimer
   ========================================================================== */
.surface83102-xfoot{
  margin-top:30px;border-top:1px solid var(--surface83102-line);
  padding-top:18px;display:grid;gap:16px;
}
.surface83102-xfoot-brand p{font-size:13.5px;color:var(--surface83102-mist)}
.surface83102-xfoot-brand p strong{color:var(--surface83102-silver)}
.surface83102-dir{
  display:grid;grid-template-columns:1fr 1fr;gap:12px 14px;
}
@media (max-width:359px){.surface83102-dir{grid-template-columns:1fr}}
.surface83102-dir-col{display:grid;gap:4px;align-content:start}
.surface83102-dir-tag{
  font-family:var(--surface83102-mono);font-size:10px;letter-spacing:2px;
  text-transform:uppercase;color:var(--surface83102-tide);padding:2px 0 4px;
  border-bottom:1px dashed rgba(64,224,208,.35);margin-bottom:3px;
}
.surface83102-dir-link{
  font-size:13px;color:var(--surface83102-silver);min-height:36px;
  display:flex;align-items:center;gap:7px;
}
.surface83102-dir-link::before{
  content:"›";font-family:var(--surface83102-mono);color:var(--surface83102-tide);
}
.surface83102-dir-link:hover{color:var(--surface83102-tide)}
.surface83102-xfoot-promos{display:grid;gap:8px}
.surface83102-promo-row{
  display:flex;align-items:center;gap:10px;min-height:46px;
  padding:0 12px;border-radius:var(--surface83102-r-s);
  border:1px solid rgba(64,224,208,.3);background:var(--surface83102-tide-soft);
  color:#dff7f4;font-size:13.5px;font-weight:600;text-align:left;
  transition:box-shadow .18s ease,border-color .18s ease;
}
.surface83102-promo-row:hover{border-color:var(--surface83102-tide);box-shadow:0 0 12px rgba(64,224,208,.25)}
.surface83102-promo-row:active{transform:scale(.985)}
.surface83102-promo-num{
  font-family:var(--surface83102-mono);font-size:10px;letter-spacing:1px;
  color:var(--surface83102-tide);border:1px solid rgba(64,224,208,.45);
  border-radius:6px;padding:3px 7px;white-space:nowrap;
}
.surface83102-xfoot-note{
  border:1px dashed rgba(192,192,192,.3);border-radius:var(--surface83102-r-s);
  padding:12px;font-size:12.3px;color:var(--surface83102-mist);background:rgba(192,192,192,.04);
}
.surface83102-xfoot-note b{color:var(--surface83102-silver)}

/* ==========================================================================
   Common footer (copyright only)
   ========================================================================== */
.surface83102-foot{
  max-width:var(--surface83102-canvas);margin:0 auto;
  padding:14px 14px calc(var(--surface83102-nav-h) + 22px + env(safe-area-inset-bottom));
  text-align:center;font-size:11.5px;color:#77828f;
  border-top:1px solid rgba(40,52,74,.5);
}
.surface83102-foot b{font-family:var(--surface83102-mono);font-weight:400;color:var(--surface83102-mist)}

/* ==========================================================================
   Mobile bottom nav - center-raised dock
   ========================================================================== */
.surface83102-bnav{
  position:fixed;left:0;right:0;bottom:0;z-index:95;
  background:rgba(13,17,23,.97);
  border-top:1px solid var(--surface83102-line);
  padding-bottom:env(safe-area-inset-bottom);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.surface83102-bnav-in{
  max-width:var(--surface83102-canvas);margin:0 auto;
  display:grid;grid-template-columns:repeat(5,1fr);align-items:end;
  height:var(--surface83102-nav-h);
}
.surface83102-bnav-item{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:var(--surface83102-nav-h);min-width:0;
  color:var(--surface83102-mist);border-radius:10px;
}
.surface83102-bnav-item svg{width:21px;height:21px}
.surface83102-bnav-txt{
  font-size:10px;letter-spacing:.4px;font-family:var(--surface83102-mono);
}
.surface83102-bnav-item:hover{color:var(--surface83102-silver)}
.surface83102-bnav-on{color:var(--surface83102-tide)}
.surface83102-bnav-on .surface83102-bnav-txt{
  font-weight:700;position:relative;
}
.surface83102-bnav-on .surface83102-bnav-txt::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  bottom:-5px;width:16px;height:2px;border-radius:2px;background:var(--surface83102-tide);
  box-shadow:0 0 8px rgba(64,224,208,.8);
}
.surface83102-bnav-cta{
  position:relative;
  width:56px;height:56px;margin:-24px auto 0;
  border-radius:50%;
  background:linear-gradient(160deg,#55ead9,#23918594);
  background:linear-gradient(160deg,#55ead9,#1f9c90);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
  color:var(--surface83102-ink);
  box-shadow:0 6px 20px rgba(64,224,208,.42),0 0 0 4px var(--surface83102-ink);
}
.surface83102-bnav-cta svg{width:20px;height:20px}
.surface83102-bnav-cta span{
  font-family:var(--surface83102-mono);font-size:8.5px;font-weight:700;letter-spacing:1px;
}
.surface83102-bnav-cta:active{transform:scale(.94)}

/* ==========================================================================
   Reveal animation (restrained fade)
   ========================================================================== */
.surface83102-reveal{opacity:0;transform:translateY(10px);transition:opacity .5s ease,transform .5s ease}
.surface83102-in{opacity:1;transform:none}

/* ==========================================================================
   Help pages: answer rail, diagnostic table and safety checklist
   ========================================================================== */
.surface83102-help-shell{padding-top:calc(var(--surface83102-top-h) + 18px)}
.surface83102-help-hero{padding:4px 0 18px;border-bottom:1px solid var(--surface83102-line)}
.surface83102-help-hero h1{font-size:27px;line-height:1.2;color:#eef3f8;letter-spacing:.1px;margin:12px 0 10px}
.surface83102-help-hero p{font-size:14px;color:var(--surface83102-mist)}
.surface83102-help-hero p strong{color:var(--surface83102-silver)}
.surface83102-help-mark{display:inline-flex;align-items:center;gap:7px;font:700 10px/1 var(--surface83102-mono);letter-spacing:1.8px;text-transform:uppercase;color:var(--surface83102-tide);border-left:3px solid var(--surface83102-tide);padding:6px 10px;background:var(--surface83102-tide-soft)}
.surface83102-answer-rail{display:grid;gap:9px;margin-top:12px}
.surface83102-answer-row{display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:start;padding:11px 10px;border:1px solid var(--surface83102-line);border-radius:var(--surface83102-r-m);background:linear-gradient(105deg,rgba(64,224,208,.08),var(--surface83102-panel) 55%)}
.surface83102-answer-index{width:30px;height:30px;display:grid;place-items:center;border-radius:8px;background:var(--surface83102-tide);color:var(--surface83102-ink);font:700 12px var(--surface83102-mono)}
.surface83102-answer-row h3{font-size:14px;line-height:1.35;color:#eef3f8;margin:0 0 4px}
.surface83102-answer-row p{font-size:13px;line-height:1.55;color:var(--surface83102-mist)}
.surface83102-answer-row p strong{color:var(--surface83102-silver)}
.surface83102-jumpbar{display:flex;gap:7px;overflow-x:auto;scrollbar-width:none;padding:2px 0 5px;margin-top:12px}
.surface83102-jumpbar::-webkit-scrollbar{display:none}
.surface83102-jumpbar a{flex:0 0 auto;min-height:38px;display:flex;align-items:center;padding:0 11px;border:1px solid var(--surface83102-line);border-radius:999px;background:var(--surface83102-panel);font:11px var(--surface83102-mono);color:var(--surface83102-silver)}
.surface83102-jumpbar a:hover{border-color:var(--surface83102-tide);color:var(--surface83102-tide)}
.surface83102-help-block{margin-top:24px}
.surface83102-help-block h2{font-size:19px;line-height:1.3;color:#eef3f8;margin-bottom:8px}
.surface83102-help-block>p{font-size:13.5px;color:var(--surface83102-mist);margin-bottom:10px}
.surface83102-help-block>p strong{color:var(--surface83102-silver)}
.surface83102-step-list{list-style:none;display:grid;gap:8px;counter-reset:helpstep}
.surface83102-step-list li{counter-increment:helpstep;position:relative;padding:11px 12px 11px 42px;border-left:2px solid var(--surface83102-tide-deep);background:var(--surface83102-panel);border-radius:0 var(--surface83102-r-s) var(--surface83102-r-s) 0;color:var(--surface83102-mist);font-size:13.2px}
.surface83102-step-list li::before{content:counter(helpstep,decimal-leading-zero);position:absolute;left:10px;top:11px;color:var(--surface83102-tide);font:700 11px var(--surface83102-mono)}
.surface83102-step-list li strong{display:block;color:#eef3f8;font-size:13.5px;margin-bottom:2px}
.surface83102-faq-stack{display:grid;gap:8px}
.surface83102-faq-item{border:1px solid var(--surface83102-line);border-radius:var(--surface83102-r-s);background:var(--surface83102-panel);padding:12px 13px}
.surface83102-faq-item h3{font-size:14px;line-height:1.4;color:#eef3f8;margin-bottom:5px}
.surface83102-faq-item h3::before{content:"Q";display:inline-grid;place-items:center;width:20px;height:20px;margin-right:7px;border-radius:5px;background:var(--surface83102-tide-soft);color:var(--surface83102-tide);font:700 10px var(--surface83102-mono);vertical-align:middle}
.surface83102-faq-item p{font-size:13px;line-height:1.58;color:var(--surface83102-mist)}
.surface83102-faq-item p::before{content:"A  ";color:var(--surface83102-tide);font:700 10px var(--surface83102-mono);letter-spacing:1px}
.surface83102-faq-item p strong{color:var(--surface83102-silver)}
.surface83102-trouble{display:grid;gap:9px}
.surface83102-trouble-item{display:grid;grid-template-columns:1fr;gap:5px;border:1px solid var(--surface83102-line);border-radius:var(--surface83102-r-m);padding:12px;background:var(--surface83102-ink-2)}
.surface83102-trouble-item h3{font-size:14px;color:#eef3f8}
.surface83102-trouble-item p{font-size:12.8px;color:var(--surface83102-mist)}
.surface83102-trouble-item b{color:var(--surface83102-tide);font-family:var(--surface83102-mono);font-size:10px;letter-spacing:1px;text-transform:uppercase}
.surface83102-condition-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.surface83102-condition{padding:11px;border:1px dashed rgba(64,224,208,.35);border-radius:var(--surface83102-r-s);background:rgba(64,224,208,.045)}
.surface83102-condition h3{font-size:13.5px;color:#eef3f8;margin-bottom:4px}
.surface83102-condition p{font-size:12.5px;line-height:1.5;color:var(--surface83102-mist)}
.surface83102-checklist{display:grid;gap:6px;list-style:none}
.surface83102-checklist li{position:relative;padding:10px 10px 10px 34px;border-bottom:1px solid var(--surface83102-line);font-size:13px;color:var(--surface83102-mist)}
.surface83102-checklist li::before{content:"✓";position:absolute;left:7px;top:8px;width:19px;height:19px;display:grid;place-items:center;border:1px solid var(--surface83102-tide);border-radius:50%;color:var(--surface83102-tide);font:700 11px var(--surface83102-mono)}
.surface83102-checklist li strong{color:var(--surface83102-silver)}
.surface83102-action-band{margin-top:14px;padding:14px;border:1px solid rgba(64,224,208,.35);border-radius:var(--surface83102-r-l);background:linear-gradient(145deg,rgba(64,224,208,.12),var(--surface83102-panel))}
.surface83102-action-band h3{font-size:15px;color:#eef3f8;margin-bottom:5px}
.surface83102-action-band p{font-size:13px;color:var(--surface83102-mist);margin-bottom:10px}
.surface83102-action-band .surface83102-dl-cta{margin-top:0}
.surface83102-safety-meter{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin:10px 0 13px}
.surface83102-safety-meter span{height:7px;border-radius:99px;background:var(--surface83102-line)}
.surface83102-safety-meter span.on{background:var(--surface83102-tide);box-shadow:0 0 8px rgba(64,224,208,.35)}
.surface83102-fact-strip{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:12px}
.surface83102-fact{padding:10px;border:1px solid var(--surface83102-line);border-radius:var(--surface83102-r-s);background:var(--surface83102-panel)}
.surface83102-fact b{display:block;color:var(--surface83102-tide);font:700 11px var(--surface83102-mono);letter-spacing:1px;text-transform:uppercase;margin-bottom:4px}
.surface83102-fact span{font-size:12.5px;color:var(--surface83102-mist)}
.surface83102-note{padding:11px 12px;margin-top:10px;border-left:3px solid var(--surface83102-warn);background:rgba(232,137,111,.07);color:var(--surface83102-mist);font-size:12.8px;border-radius:0 var(--surface83102-r-s) var(--surface83102-r-s) 0}
.surface83102-note strong{color:#f0b19f}
@media (max-width:359px){
  .surface83102-condition-grid{grid-template-columns:1fr}
  .surface83102-help-hero h1{font-size:24px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .surface83102-reveal{opacity:1;transform:none}
}