/* =====================================================================
   StackMatch — design system
   Concept: a "console for building your software stack"
   Palette: ink #0E1525 · indigo #4F46E5 · violet #7C3AED · cyan #06B6D4
   Type: Space Grotesk (display) · Inter (body) · JetBrains Mono (data)
   Full-width responsive. Light + dark via [data-theme].
   ===================================================================== */

:root{
  --ink:#0E1525;
  --ink-2:#33405c;
  --muted:#5e6b85;
  --bg:#FBFCFE;
  --surface:#ffffff;
  --surface-2:#f2f4f9;
  --line:#e5e9f2;
  --line-2:#d8deec;

  --indigo:#4F46E5;
  --indigo-d:#3f37c9;
  --violet:#7C3AED;
  --cyan:#06B6D4;
  --grad:linear-gradient(100deg,#4F46E5 0%,#7C3AED 45%,#06B6D4 100%);
  --grad-soft:linear-gradient(100deg,rgba(79,70,229,.12),rgba(124,58,237,.10),rgba(6,182,212,.12));

  --match:#06B6D4;          /* the "this matches you" signal */
  --pos:#0EA66B;            /* pros / positives */
  --star:#F59E0B;           /* ratings */

  --shadow-sm:0 1px 2px rgba(14,21,37,.06), 0 1px 3px rgba(14,21,37,.05);
  --shadow:0 8px 30px rgba(14,21,37,.08);
  --shadow-lg:0 24px 70px rgba(14,21,37,.16);
  --ring:0 0 0 4px rgba(79,70,229,.18);

  --r-sm:10px; --r:16px; --r-lg:24px; --r-pill:999px;
  --maxw:1140px;
  --pad:clamp(16px,4vw,28px);

  --font-d:"Space Grotesk",system-ui,sans-serif;
  --font-b:"Inter",system-ui,sans-serif;
  --font-m:"JetBrains Mono",ui-monospace,monospace;
}

[data-theme="dark"]{
  --ink:#eef2fb; --ink-2:#c2cbe0; --muted:#94a0bd;
  --bg:#0a0e1a; --surface:#10162a; --surface-2:#161d36; --line:#222b47; --line-2:#2c3658;
  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow:0 8px 30px rgba(0,0,0,.5);
  --shadow-lg:0 24px 70px rgba(0,0,0,.6);
  --grad-soft:linear-gradient(100deg,rgba(79,70,229,.22),rgba(124,58,237,.18),rgba(6,182,212,.2));
  --ring:0 0 0 4px rgba(124,58,237,.35);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font-b);background:var(--bg);color:var(--ink);
  line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased;
  background-image:radial-gradient(rgba(79,70,229,.05) 1px,transparent 1px);
  background-size:26px 26px;
}
[data-theme="dark"] body{background-image:radial-gradient(rgba(124,58,237,.08) 1px,transparent 1px);}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{font-family:var(--font-d);font-weight:600;line-height:1.12;letter-spacing:-.02em;margin:0}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}
.mono{font-family:var(--font-m)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.center{text-align:center}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--surface);padding:8px 12px;border-radius:8px;z-index:200}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:8px}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:80;backdrop-filter:saturate(140%) blur(12px);
  background:color-mix(in srgb,var(--bg) 82%,transparent);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:18px;height:64px;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-d);font-weight:700;font-size:1.12rem;letter-spacing:-.02em}
.brand .logo{width:30px;height:30px;border-radius:9px;background:var(--grad);display:grid;place-items:center;color:#fff;
  font-size:15px;box-shadow:0 4px 14px rgba(79,70,229,.4);position:relative;overflow:hidden}
.brand .logo::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 55%,rgba(255,255,255,.25))}
.nav-links{display:flex;gap:6px;margin-left:auto;align-items:center}
.nav-links a{padding:8px 12px;border-radius:9px;color:var(--ink-2);font-size:.93rem;font-weight:500}
.nav-links a:hover{background:var(--surface-2);color:var(--ink)}
.nav-cta{background:var(--ink);color:var(--bg)!important;padding:9px 16px!important;border-radius:var(--r-pill)!important;font-weight:600!important}
.nav-cta:hover{transform:translateY(-1px)}
.icon-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--surface);cursor:pointer;font-size:16px;display:grid;place-items:center;color:var(--ink)}
.icon-btn:hover{border-color:var(--line-2)}
.menu-btn{display:none}
@media(max-width:860px){
  .nav-links{position:fixed;inset:64px 0 auto 0;flex-direction:column;align-items:stretch;background:var(--surface);
    border-bottom:1px solid var(--line);padding:10px var(--pad) 16px;gap:2px;margin:0;display:none;box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px}
  .menu-btn{display:grid;margin-left:auto}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;border:0;cursor:pointer;font-weight:600;font-size:.95rem;
  padding:12px 20px;border-radius:var(--r-pill);transition:transform .15s, box-shadow .15s, background .15s}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 8px 24px rgba(79,70,229,.32)}
.btn-grad:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(79,70,229,.42)}
.btn-ink{background:var(--ink);color:var(--bg)}
.btn-ink:hover{transform:translateY(-2px)}
.btn-ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line-2)}
.btn-ghost:hover{border-color:var(--indigo);color:var(--indigo)}
.btn-sm{padding:8px 14px;font-size:.85rem}

/* ---------- hero ---------- */
.hero{position:relative;padding:clamp(36px,7vw,84px) 0 clamp(28px,4vw,44px);overflow:hidden}
.hero::before{content:"";position:absolute;top:-30%;left:50%;transform:translateX(-50%);
  width:min(1000px,100%);height:680px;background:var(--grad-soft);filter:blur(40px);border-radius:50%;z-index:-1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-m);font-size:.74rem;letter-spacing:.06em;
  text-transform:uppercase;color:var(--indigo);background:color-mix(in srgb,var(--indigo) 10%,transparent);
  padding:6px 12px;border-radius:var(--r-pill);border:1px solid color-mix(in srgb,var(--indigo) 22%,transparent)}
.hero h1{font-size:clamp(2.1rem,5.6vw,4rem);margin:18px 0 0;max-width:16ch}
.hero .lede{font-size:clamp(1.02rem,2vw,1.22rem);color:var(--muted);max-width:54ch;margin:16px 0 0}
.hero-stats{display:flex;gap:26px;flex-wrap:wrap;margin-top:22px}
.hero-stats b{font-family:var(--font-d);font-size:1.5rem;display:block;line-height:1}
.hero-stats span{font-size:.82rem;color:var(--muted)}

/* ---------- FINDER (signature) ---------- */
.finder{margin-top:34px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-lg);overflow:hidden;position:relative}
.finder-top{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);
  background:var(--surface-2)}
.finder-dots{display:flex;gap:6px}
.finder-dots i{width:11px;height:11px;border-radius:50%;background:var(--line-2)}
.finder-dots i:nth-child(1){background:#ff5f57}.finder-dots i:nth-child(2){background:#febc2e}.finder-dots i:nth-child(3){background:#28c840}
.finder-title{font-family:var(--font-m);font-size:.8rem;color:var(--muted)}
.finder-body{display:grid;grid-template-columns:230px 1fr;min-height:340px}
@media(max-width:720px){.finder-body{grid-template-columns:1fr}}
.rail{border-right:1px solid var(--line);padding:22px 20px;background:linear-gradient(180deg,var(--surface),var(--surface-2))}
@media(max-width:720px){.rail{display:none}}
.rail-step{display:flex;gap:12px;align-items:flex-start;padding:10px 0;color:var(--muted);position:relative}
.rail-step .num{width:26px;height:26px;border-radius:50%;border:1.5px solid var(--line-2);display:grid;place-items:center;
  font-family:var(--font-m);font-size:.78rem;flex:none;background:var(--surface)}
.rail-step.active{color:var(--ink)}
.rail-step.active .num{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 4px 12px rgba(79,70,229,.4)}
.rail-step.done .num{background:var(--pos);border-color:transparent;color:#fff}
.rail-step .lbl small{display:block;font-size:.72rem;color:var(--muted)}
.rail-step .lbl b{font-weight:600;font-size:.92rem}
.rail-line{position:absolute;left:33px;top:36px;bottom:-6px;width:1.5px;background:var(--line)}
.rail-step:last-child .rail-line{display:none}

.stage{padding:26px 26px 22px;display:flex;flex-direction:column}
.stage h2{font-size:1.32rem;margin-bottom:4px}
.stage .q-sub{color:var(--muted);font-size:.92rem;margin-bottom:18px}
.opt-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.opt{display:flex;align-items:center;gap:11px;text-align:left;padding:14px;border:1.5px solid var(--line);
  background:var(--surface);border-radius:var(--r);cursor:pointer;transition:.15s;font-size:.95rem;color:var(--ink);width:100%}
.opt:hover{border-color:var(--indigo);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.opt.sel{border-color:var(--indigo);background:color-mix(in srgb,var(--indigo) 7%,var(--surface))}
.opt .o-ic{width:38px;height:38px;border-radius:11px;background:var(--grad-soft);display:grid;place-items:center;font-size:19px;flex:none}
.opt .o-tx b{display:block;font-weight:600;font-size:.95rem;line-height:1.2}
.opt .o-tx small{color:var(--muted);font-size:.8rem}
.stage-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;padding-top:18px}
.link-btn{background:none;border:0;color:var(--muted);cursor:pointer;font-weight:500;font-size:.9rem}
.link-btn:hover{color:var(--ink)}

/* results */
.results{display:flex;flex-direction:column;gap:12px}
.result-card{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;padding:14px;
  border:1.5px solid var(--line);border-radius:var(--r);background:var(--surface);transition:.15s;position:relative}
.result-card:hover{border-color:var(--line-2);box-shadow:var(--shadow-sm)}
.result-card.top{border-color:var(--match);box-shadow:0 0 0 1px var(--match), 0 10px 30px rgba(6,182,212,.18)}
.match-badge{position:absolute;top:-10px;left:14px;background:var(--match);color:#04222a;font-family:var(--font-m);
  font-size:.66rem;font-weight:700;letter-spacing:.05em;padding:3px 9px;border-radius:var(--r-pill);text-transform:uppercase}
.t-logo{width:46px;height:46px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;
  font-family:var(--font-d);font-weight:700;font-size:1.1rem;flex:none}
.t-meta b{font-family:var(--font-d);font-size:1rem}
.t-meta p{margin:2px 0 0;color:var(--muted);font-size:.84rem;line-height:1.35}
.t-meta .tags{display:flex;gap:6px;margin-top:7px;flex-wrap:wrap}
.tag{font-family:var(--font-m);font-size:.7rem;padding:3px 8px;border-radius:6px;background:var(--surface-2);color:var(--ink-2)}
.tag.price{background:color-mix(in srgb,var(--pos) 14%,transparent);color:var(--pos)}
.t-side{display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.stars{color:var(--star);font-size:.85rem;letter-spacing:1px}

/* ---------- sections ---------- */
section{padding:clamp(40px,6vw,72px) 0}
.sec-head{max-width:60ch}
.sec-head .eyebrow{margin-bottom:14px}
.sec-head h2{font-size:clamp(1.7rem,3.6vw,2.5rem)}
.sec-head p{color:var(--muted);margin-top:10px;font-size:1.05rem}
.sec-flush{display:flex;justify-content:space-between;align-items:end;gap:20px;flex-wrap:wrap}

/* category grid */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-top:30px}
.cat-card{padding:20px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);transition:.18s;display:block}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:transparent}
.cat-card .c-ic{width:46px;height:46px;border-radius:13px;background:var(--grad-soft);display:grid;place-items:center;font-size:22px;margin-bottom:14px}
.cat-card h3{font-size:1.06rem}
.cat-card p{color:var(--muted);font-size:.88rem;margin:6px 0 0}
.cat-card .c-count{font-family:var(--font-m);font-size:.75rem;color:var(--indigo);margin-top:12px;display:inline-block}

/* tool grid (browse / category) */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;margin-top:28px}
.tool{border:1px solid var(--line);border-radius:var(--r);background:var(--surface);padding:18px;display:flex;
  flex-direction:column;transition:.18s;position:relative}
.tool:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:transparent}
.tool-head{display:flex;gap:12px;align-items:center;margin-bottom:12px}
.tool-head .t-logo{width:42px;height:42px;font-size:1rem;border-radius:11px}
.tool-head h3{font-size:1.04rem}
.tool-head .stars{font-size:.8rem}
.tool .desc{color:var(--muted);font-size:.9rem;flex:1}
.tool .strengths{list-style:none;padding:0;margin:12px 0;display:flex;flex-direction:column;gap:6px}
.tool .strengths li{font-size:.85rem;display:flex;gap:8px;align-items:flex-start;color:var(--ink-2)}
.tool .strengths li::before{content:"✓";color:var(--pos);font-weight:700;flex:none}
.tool-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:8px;padding-top:14px;border-top:1px solid var(--line)}
.compare-add{background:none;border:1px solid var(--line-2);border-radius:8px;padding:7px 12px;cursor:pointer;
  font-size:.82rem;font-weight:600;color:var(--ink-2);display:inline-flex;gap:6px;align-items:center;transition:.15s}
.compare-add:hover{border-color:var(--indigo);color:var(--indigo)}
.compare-add.added{background:var(--indigo);color:#fff;border-color:var(--indigo)}

/* filters */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}
.chip-f{font-family:var(--font-m);font-size:.8rem;padding:7px 13px;border-radius:var(--r-pill);border:1px solid var(--line-2);
  background:var(--surface);cursor:pointer;color:var(--ink-2);transition:.15s}
.chip-f:hover{border-color:var(--indigo)}
.chip-f.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}

/* how it works */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:30px}
.step{padding:22px;border-radius:var(--r);background:var(--surface);border:1px solid var(--line);position:relative}
.step .s-n{font-family:var(--font-m);font-size:.8rem;color:var(--indigo)}
.step h3{font-size:1.1rem;margin:8px 0 6px}
.step p{color:var(--muted);font-size:.9rem;margin:0}

/* comparison rows (popular comparisons) */
.vs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;margin-top:26px}
.vs{display:flex;align-items:center;gap:10px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r);
  background:var(--surface);font-weight:600;transition:.15s}
.vs:hover{border-color:var(--indigo);transform:translateY(-2px)}
.vs .vmid{font-family:var(--font-m);color:var(--muted);font-size:.8rem;font-weight:400}

/* compare table */
.cmp-wrap{overflow-x:auto;margin-top:24px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table.cmp{border-collapse:collapse;width:100%;min-width:560px}
table.cmp th,table.cmp td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;font-size:.9rem}
table.cmp thead th{background:var(--surface-2);font-family:var(--font-d);font-size:.95rem;position:sticky;top:0}
table.cmp tbody th{font-family:var(--font-m);font-size:.78rem;color:var(--muted);font-weight:500;text-transform:uppercase;letter-spacing:.04em;width:130px}

/* guides */
.guide-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin-top:30px}
.guide{border:1px solid var(--line);border-radius:var(--r);background:var(--surface);overflow:hidden;transition:.18s;display:flex;flex-direction:column}
.guide:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:transparent}
.guide .g-top{height:96px;background:var(--grad-soft);display:grid;place-items:center;font-size:34px}
.guide .g-body{padding:18px}
.guide .g-cat{font-family:var(--font-m);font-size:.72rem;color:var(--indigo);text-transform:uppercase;letter-spacing:.05em}
.guide h3{font-size:1.05rem;margin:8px 0 6px}
.guide p{color:var(--muted);font-size:.88rem;margin:0}

/* article body */
.article{max-width:720px;margin-inline:auto}
.article h1{font-size:clamp(1.8rem,4vw,2.6rem);margin-bottom:12px}
.article .meta{font-family:var(--font-m);font-size:.8rem;color:var(--muted);margin-bottom:28px}
.prose{font-size:1.04rem;color:var(--ink-2)}
.prose h2{font-size:1.4rem;margin:32px 0 12px;color:var(--ink)}
.prose p{margin:0 0 16px}
.prose ul{margin:0 0 16px;padding-left:0;list-style:none}
.prose ul li{position:relative;padding-left:26px;margin-bottom:9px}
.prose ul li::before{content:"→";position:absolute;left:0;color:var(--indigo);font-weight:700}
.prose strong{color:var(--ink)}
.callout{background:var(--grad-soft);border:1px solid var(--line);border-left:3px solid var(--indigo);
  padding:16px 18px;border-radius:var(--r-sm);margin:22px 0;font-size:.95rem}

/* FAQ */
.faq{margin-top:28px;max-width:780px}
.faq details{border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface);margin-bottom:10px;overflow:hidden}
.faq summary{padding:16px 18px;cursor:pointer;font-weight:600;font-family:var(--font-d);list-style:none;display:flex;justify-content:space-between;gap:14px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--indigo);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 18px 18px;margin:0;color:var(--muted);font-size:.94rem}

/* CTA band */
.cta-band{background:var(--ink);color:var(--bg);border-radius:var(--r-lg);padding:clamp(28px,5vw,52px);text-align:center;
  position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:var(--grad);opacity:.16}
.cta-band h2{font-size:clamp(1.6rem,3.4vw,2.3rem);position:relative}
.cta-band p{position:relative;opacity:.82;max-width:46ch;margin:12px auto 22px}
.cta-band .field{position:relative;display:flex;gap:8px;max-width:440px;margin-inline:auto;flex-wrap:wrap;justify-content:center}
.cta-band input{flex:1;min-width:200px;padding:13px 16px;border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08);color:#fff;font-size:.95rem}
.cta-band input::placeholder{color:rgba(255,255,255,.6)}

/* ad slot */
.ad-slot{margin:26px auto;max-width:var(--maxw);border:1px dashed var(--line-2);border-radius:var(--r);
  background:var(--surface-2);min-height:280px;display:grid;place-items:center;text-align:center;padding:14px}
.ad-label{font-family:var(--font-m);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ad-slot .ad-note{font-size:.78rem;color:var(--muted)}

/* footer */
.foot{border-top:1px solid var(--line);margin-top:40px;padding:46px 0 30px;background:var(--surface)}
.foot-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:30px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}
.foot h4{font-family:var(--font-m);font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:14px;font-weight:500}
.foot a{display:block;color:var(--ink-2);font-size:.9rem;padding:5px 0}
.foot a:hover{color:var(--indigo)}
.foot .disc{color:var(--muted);font-size:.84rem;max-width:38ch;margin-top:12px;line-height:1.55}
.foot-bottom{border-top:1px solid var(--line);margin-top:30px;padding-top:20px;color:var(--muted);font-size:.82rem;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}

/* breadcrumb */
.crumb{font-family:var(--font-m);font-size:.8rem;color:var(--muted);padding-top:22px}
.crumb a:hover{color:var(--indigo)}

/* compare tray (floating) */
.tray{position:fixed;left:50%;transform:translateX(-50%);bottom:18px;z-index:90;background:var(--ink);color:var(--bg);
  border-radius:var(--r-pill);padding:10px 12px 10px 20px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow-lg);
  max-width:calc(100vw - 28px);transition:transform .25s, opacity .25s}
.tray.hide{transform:translateX(-50%) translateY(120%);opacity:0;pointer-events:none}
.tray .t-count{font-family:var(--font-m);font-size:.85rem}
.tray .t-logos{display:flex}
.tray .t-logos .t-logo{width:30px;height:30px;font-size:.78rem;margin-left:-8px;border:2px solid var(--ink)}
.tray .btn{padding:9px 16px}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.hidden{display:none!important}
.fade-in{animation:fadeIn .4s ease both}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* =====================================================================
   MOBILE-ONLY LOCK
   Render StackMatch as a phone at every screen size. On phones it's a
   normal full-width mobile layout; on larger screens it becomes a fixed
   device frame with its own internal scroll and a sticky header.
   Appended last so it overrides the responsive base rules above.
   ===================================================================== */
:root{ --maxw:460px; }                 /* phone column width everywhere */

/* Always use the compact hamburger navigation */
.menu-btn{ display:grid; }
.nav-links{
  position:fixed; left:0; right:0; top:64px; flex-direction:column; align-items:stretch;
  background:var(--surface); border-bottom:1px solid var(--line);
  padding:10px var(--pad) 16px; gap:2px; margin:0; display:none;
  box-shadow:var(--shadow); width:100%; z-index:90;
}
.nav-links.open{ display:flex; }
.nav-links a{ padding:12px; }
.nav-links .nav-cta{ text-align:center; }

/* The finder is always a single column with the step rail hidden */
.finder-body{ grid-template-columns:1fr; }
.rail{ display:none; }

/* Footer collapses to a compact layout at all widths (its base collapse
   rule is viewport-gated and never fires inside the narrow device frame). */
.foot-grid{ grid-template-columns:1fr 1fr; gap:24px; }
.foot-grid > :first-child{ grid-column:1 / -1; }

/* ---- Larger screens: a real device frame ---- */
@media (min-width:600px){
  html{ background:var(--surface-2); height:100%; overflow:hidden; }
  body{
    width:420px;
    height:92vh; max-height:940px;
    margin:4vh auto;
    overflow-y:auto; overflow-x:clip;             /* the phone scrolls internally; never sideways */
    -webkit-overflow-scrolling:touch;
    border:1px solid var(--line-2);
    border-radius:36px;
    box-shadow:var(--shadow-lg);
    position:relative;
    scrollbar-width:none;                          /* hide scrollbar for a clean device look */
  }
  body::-webkit-scrollbar{ width:0; height:0; }

  /* header sticks to the top of the phone's own scroll area */
  .nav{ position:sticky; top:0; border-radius:36px 36px 0 0; }
  /* dropdown menu anchors under the header, inside the frame */
  .nav-links{ position:absolute; left:0; right:0; top:100%; width:auto; }

  /* compare tray pinned just above the bottom edge of the frame */
  .tray{ position:fixed; bottom:calc(4vh + 16px); }

  .foot{ margin-bottom:0; }
}