/* HeatScan — mobile app shell. Royal-blue hero cards with concentric arcs, white cards, dark action buttons. */
:root{
  --canvas:#eff0f8; --screen:#f7f8fc; --card:#ffffff; --line:#ececf4;
  --fg:#1c1c2e; --fg-2:#8b8ca3; --fg-3:#b3b4c6;
  --blue:#3a64ff; --blue-2:#5c82ff; --blue-3:#8eabff; --blue-4:#b9caff; --blue-dk:#2448d6; --blue-soft:#e6ecff;
  --dark:#2a2a33; --on-dark:#ffffff;
  --ok:#2fa865; --ok-soft:#e1f6ea; --mid:#e59a1f; --mid-soft:#fdf1dc; --hot:#ec7a2a; --bad:#e5412d; --bad-soft:#fde6e0;
  --t0:#3a64ff; --t1:#35b56d; --t2:#f2c94c; --t3:#f08a2c; --t4:#e5412d;
  --shadow:0 10px 30px rgba(40,50,120,.08);
  --font:"Poppins","Segoe UI",system-ui,-apple-system,Roboto,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --canvas:#0c0d16; --screen:#12131f; --card:#1b1d2c; --line:#272a3b;
  --fg:#eceef8; --fg-2:#9396ae; --fg-3:#5f6178; --blue-soft:#1f2850; --dark:#eceef8; --on-dark:#12131f;
  --ok-soft:#173326; --mid-soft:#3a2c12; --bad-soft:#3a1c16; --shadow:0 10px 30px rgba(0,0,0,.35); color-scheme:dark }}
:root[data-theme="dark"]{
  --canvas:#0c0d16; --screen:#12131f; --card:#1b1d2c; --line:#272a3b;
  --fg:#eceef8; --fg-2:#9396ae; --fg-3:#5f6178; --blue-soft:#1f2850; --dark:#eceef8; --on-dark:#12131f;
  --ok-soft:#173326; --mid-soft:#3a2c12; --bad-soft:#3a1c16; --shadow:0 10px 30px rgba(0,0,0,.35); color-scheme:dark }

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%;margin:0}
body{background:var(--canvas);color:var(--fg);font-family:var(--font);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}
button,input,textarea{font:inherit;color:inherit}
button:focus-visible,label:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
p,h1,h2,h3{margin:0}
img{max-width:100%}
[hidden]{display:none!important}
.vis{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}

/* shell: full screen on every device; layout adapts below */
.app{height:100%;width:100%;background:var(--screen);display:flex;flex-direction:column;position:relative;overflow:hidden}
.view{flex:1;overflow-y:auto;overflow-x:hidden;padding:max(22px, env(safe-area-inset-top, 0px)) max(22px, env(safe-area-inset-right, 0px)) 18px max(22px, env(safe-area-inset-left, 0px));display:grid;grid-template-columns:minmax(0,1fr);grid-auto-rows:max-content;gap:20px;align-content:start;scrollbar-width:none}
.view::-webkit-scrollbar{display:none}

.nav{flex:none;display:grid;grid-template-columns:repeat(4,1fr);background:var(--card);border-top-left-radius:26px;border-top-right-radius:26px;box-shadow:0 -6px 24px rgba(40,50,120,.06);padding:10px max(8px, env(safe-area-inset-right, 0px)) calc(10px + env(safe-area-inset-bottom, 0px)) max(8px, env(safe-area-inset-left, 0px))}
.nav button{border:0;background:none;display:grid;justify-items:center;gap:3px;font-size:.7rem;color:var(--fg-3);cursor:pointer;padding:4px}
.nav button svg{width:22px;height:22px}
.nav button[aria-selected="true"]{color:var(--blue);font-weight:600}
.brand,.side-credit{display:none}
.cols,.col{display:contents}

/* text */
.head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.hello{min-width:0}
.hello span{display:block;color:var(--fg-2);font-size:.85rem}
.hello strong{display:block;font-size:1.15rem;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.avatar{width:44px;height:44px;border-radius:14px;background:var(--card);box-shadow:var(--shadow);display:grid;place-items:center;flex:none;border:0;cursor:pointer;color:var(--blue)}
.avatar svg{width:22px;height:22px}
.title{font-size:1.2rem;font-weight:700;text-align:center}
.sect{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.sect h3{font-size:1.02rem;font-weight:600}
.sect span{font-size:.72rem;color:var(--fg-3)}
.muted{color:var(--fg-2)}
.small{font-size:.78rem}

/* hero cards */
.hero{position:relative;border-radius:24px;color:#fff;padding:24px 22px 22px;text-align:center;overflow:hidden;background:radial-gradient(circle at 50% -38%, var(--blue-4) 0 34%, var(--blue-3) 34% 50%, var(--blue-2) 50% 66%, var(--blue) 66%)}
.hero.side{background:radial-gradient(circle at -6% -10%, var(--blue-4) 0 26%, var(--blue-3) 26% 44%, var(--blue-2) 44% 63%, var(--blue) 63% 82%, var(--blue-dk) 82%)}
.hero .lbl{font-size:.82rem;opacity:.92}
.hero .num{font-size:2.1rem;font-weight:600;letter-spacing:-.01em;margin-top:2px;font-variant-numeric:tabular-nums;line-height:1.2}
.hero .num small{font-size:1rem;opacity:.75;font-weight:500}
.hero .track{height:4px;border-radius:2px;background:rgba(255,255,255,.35);margin:14px auto 8px;max-width:210px;overflow:hidden}
.hero .track i{display:block;height:100%;background:#fff;border-radius:2px}
.hero .cap{font-size:.74rem;opacity:.9}
.badge{display:inline-block;font-size:.66rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.22);margin-top:10px}
.skel{background:linear-gradient(90deg,rgba(255,255,255,.18),rgba(255,255,255,.35),rgba(255,255,255,.18));background-size:200% 100%;animation:sk 1.2s linear infinite;border-radius:8px;color:transparent!important}
@keyframes sk{from{background-position:200% 0}to{background-position:-200% 0}}

/* buttons */
.actions{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.dark{border:0;border-radius:16px;background:var(--dark);color:var(--on-dark);padding:16px 10px;display:flex;align-items:center;justify-content:center;gap:9px;font-weight:500;font-size:.88rem;cursor:pointer;text-align:center}
.dark svg{width:20px;height:20px;flex:none}
.pill{border:0;border-radius:14px;background:var(--blue);color:#fff;padding:15px 18px;font-weight:600;font-size:.92rem;cursor:pointer;width:100%;display:flex;align-items:center;justify-content:center;gap:8px}
.pill svg{width:18px;height:18px}
.pill.ghost{background:var(--blue-soft);color:var(--blue)}
.pill:disabled{opacity:.55;cursor:default}
.link{border:0;background:none;color:var(--blue);font-weight:600;cursor:pointer;padding:0}

/* cards */
.sheet{background:var(--card);border-radius:24px;padding:18px;box-shadow:var(--shadow)}
.sheet h3{font-weight:600;font-size:1.02rem}
.stats3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.stats2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mini{background:var(--card);border-radius:18px;padding:13px 14px;box-shadow:var(--shadow);min-width:0}
.mini span{font-size:.7rem;color:var(--fg-2);display:block}
.mini b{display:block;font-size:1.15rem;font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}
.goal{background:var(--card);border-radius:20px;padding:16px;display:grid;grid-template-columns:48px minmax(0,1fr);gap:14px;align-items:center;box-shadow:var(--shadow)}
.goal .ic{width:48px;height:48px;border-radius:50%;background:var(--blue-soft);display:grid;place-items:center;color:var(--blue)}
.goal .ic svg{width:22px;height:22px}
.goal strong{font-weight:600;font-size:.92rem;display:block}
.goal .bar{height:4px;border-radius:2px;background:var(--line);margin:8px 0 6px;overflow:hidden}
.goal .bar i{display:block;height:100%;border-radius:2px}
.goal .meta{display:flex;justify-content:space-between;gap:8px;font-size:.72rem;color:var(--fg-2)}
.goal .meta span:last-child{color:var(--fg-3)}

/* location */
.loc{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:12px;align-items:center;background:var(--card);border-radius:18px;padding:12px 14px;box-shadow:var(--shadow)}
.loc .ic{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:var(--blue-soft);color:var(--blue)}
.loc .ic svg{width:20px;height:20px}
.loc strong{display:block;font-size:.88rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.loc span{font-size:.72rem;color:var(--fg-2)}
.loc.off .ic{background:var(--mid-soft);color:var(--mid)}
.tag-s{font-size:.66rem;font-weight:600;padding:4px 9px;border-radius:999px;background:var(--ok-soft);color:var(--ok);white-space:nowrap}

/* chart */
.chart-wrap{position:relative;margin-top:10px;touch-action:pan-y}
.chart{width:100%;height:auto;display:block;overflow:visible;cursor:pointer}
.chart .hit{fill:transparent}
.readout{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:12px;background:var(--screen);border-radius:16px;padding:10px 8px;text-align:center}
.readout div span{display:block;font-size:.64rem;color:var(--fg-2)}
.readout div b{font-size:.92rem;font-weight:600;font-variant-numeric:tabular-nums}
.readout .when{grid-column:1/-1;font-size:.72rem;color:var(--blue);font-weight:600}
.legend{display:flex;gap:16px;justify-content:center;font-size:.72rem;color:var(--fg-2);margin-top:8px;flex-wrap:wrap}
.legend i{display:inline-block;width:12px;height:3px;border-radius:2px;vertical-align:middle;margin-right:6px}

/* capture */
.cap-card{background:var(--card);border-radius:24px;box-shadow:var(--shadow);padding:20px;display:grid;gap:16px}
.lens{width:100%;aspect-ratio:4/3;border-radius:20px;border:2px dashed var(--blue-3);background:var(--blue-soft);display:grid;place-items:center;cursor:pointer;color:var(--blue);text-align:center;padding:12px}
.lens .ring{width:76px;height:76px;border-radius:50%;background:var(--blue);display:grid;place-items:center;color:#fff;box-shadow:0 0 0 10px rgba(58,100,255,.15);margin:0 auto}
.lens .ring svg{width:30px;height:30px}
.lens p{margin-top:16px;font-weight:600;font-size:.92rem}
.field{display:grid;gap:8px}
.field label{font-weight:600;font-size:.86rem}
.field textarea{width:100%;min-height:84px;resize:vertical;border:1.5px solid var(--line);border-radius:16px;background:var(--card);padding:12px 14px;font-size:.88rem;line-height:1.45}
.field textarea:focus{border-color:var(--blue);outline:0}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:0;background:var(--blue-soft);color:var(--blue);border-radius:12px;padding:7px 12px;font-size:.76rem;font-weight:500;cursor:pointer;text-align:left}

/* photo stage */
.stage{position:relative;border-radius:22px;overflow:hidden;background:var(--line);width:100%;box-shadow:var(--shadow)}
.stage img{position:relative;width:100%;height:auto;max-height:62vh;min-height:160px;object-fit:cover;display:block}
.stage canvas.heat{position:absolute;inset:-24px;width:calc(100% + 48px);height:calc(100% + 48px);filter:blur(16px) saturate(1.2);opacity:0;transition:opacity .45s ease;pointer-events:none}
.stage.thermal canvas.heat{opacity:.78}
.stage.thermal img{filter:grayscale(1) brightness(.85)}
.stage .scanline{position:absolute;left:0;right:0;height:3px;background:#fff;box-shadow:0 0 20px 5px var(--blue);top:0;animation:sweep 1.8s ease-in-out infinite alternate;display:none}
.stage.scanning .scanline{display:block}
.stage.scanning img{filter:saturate(.5) brightness(.85)}
@keyframes sweep{from{top:0}to{top:calc(100% - 3px)}}
.stage .tag{position:absolute;left:12px;top:12px;background:rgba(20,22,40,.72);color:#fff;font-size:.66rem;font-weight:600;padding:5px 10px;border-radius:999px;letter-spacing:.04em}
.stage .seg{position:absolute;right:10px;top:10px;display:flex;background:rgba(20,22,40,.72);border-radius:12px;padding:3px}
.stage .seg button{border:0;background:none;color:#fff;font-size:.72rem;font-weight:600;padding:5px 11px;border-radius:9px;cursor:pointer}
.stage .seg button[aria-pressed="true"]{background:#fff;color:#1c1c2e}
.stage .scale{position:absolute;left:12px;right:12px;bottom:12px;display:none;align-items:center;gap:8px;color:#fff;font-size:.64rem;font-weight:600}
.stage.thermal .scale{display:flex}
.stage .scale i{flex:1;height:6px;border-radius:3px;background:linear-gradient(90deg,var(--t0),var(--t1),var(--t2),var(--t3),var(--t4))}
.status{display:flex;align-items:center;justify-content:center;gap:10px;color:var(--fg-2);font-size:.85rem;text-align:center}
.dot{width:9px;height:9px;border-radius:50%;background:var(--blue);animation:pl 1s ease-in-out infinite alternate;flex:none}
@keyframes pl{from{opacity:.3}to{opacity:1}}
.alert{background:var(--bad-soft);border-radius:16px;padding:12px 14px;font-size:.84rem}
.info{background:var(--blue-soft);border-radius:16px;padding:12px 14px;font-size:.84rem}

/* result */
.explain{background:var(--card);border-radius:22px;padding:18px;box-shadow:var(--shadow);display:grid;gap:10px}
.explain h3{font-size:1rem;font-weight:600}
.explain p{font-size:.88rem;color:var(--fg-2);line-height:1.6}
.qa{border-left:3px solid var(--blue);padding:4px 0 4px 12px}
.qa span{display:block;font-size:.72rem;color:var(--fg-3);margin-bottom:2px}
.qa p{color:var(--fg)}
.risk{border-radius:22px;padding:16px 18px;display:grid;gap:10px}
.risk .top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.risk h3{font-size:1rem;font-weight:600}
.risk .lv{font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;padding:4px 10px;border-radius:999px;color:#fff}
.risk ul{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.risk li{display:grid;grid-template-columns:22px minmax(0,1fr);gap:8px;font-size:.86rem}
.risk li b{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:.7rem;color:#fff}
.fix{background:var(--card);border-radius:20px;padding:16px;box-shadow:var(--shadow);display:grid;grid-template-columns:auto minmax(0,1fr);gap:14px;align-items:start}
.fix .dt{min-width:58px;border-radius:14px;background:var(--ok-soft);color:var(--ok);text-align:center;padding:8px 6px}
.fix .dt b{display:block;font-size:1.05rem;font-weight:700}
.fix .dt span{font-size:.6rem}
.fix strong{display:block;font-weight:600;font-size:.9rem}
.fix p{font-size:.8rem;color:var(--fg-2);margin-top:2px}
.fix em{font-style:normal;display:inline-block;margin-top:6px;font-size:.66rem;font-weight:600;padding:3px 8px;border-radius:8px;background:var(--screen);color:var(--fg-2)}
a{color:var(--blue)}

footer.credit{text-align:center;font-size:.72rem;color:var(--fg-3);padding:6px 0 2px}
footer.credit b{color:var(--fg-2);font-weight:600;letter-spacing:.04em}

/* onboarding & permission sheets */
.onb{position:absolute;inset:0;background:var(--screen);z-index:5;display:flex;flex-direction:column;justify-content:flex-end;padding:max(24px, env(safe-area-inset-top, 0px)) max(22px, env(safe-area-inset-right, 0px)) calc(26px + env(safe-area-inset-bottom, 0px)) max(22px, env(safe-area-inset-left, 0px))}
.onb .art{flex:1;display:grid;place-items:center;min-height:160px}
.onb .art svg{width:min(250px,68%);height:auto}
.onb .box{background:var(--card);border-radius:24px;box-shadow:var(--shadow);padding:28px 22px;text-align:center;display:grid;gap:12px;justify-items:center}
.onb h2{font-size:1.45rem;font-weight:700}
.onb p{color:var(--fg-2);font-size:.88rem;max-width:32ch}
.onb .pill{width:auto;min-width:180px;padding:13px 30px;margin-top:8px}
.onb .steps{display:flex;gap:6px;margin-top:4px}
.onb .steps i{width:8px;height:8px;border-radius:4px;background:var(--line)}
.onb .steps i.on{width:22px;background:var(--blue)}

@media (max-width:360px){
  .view{gap:16px}
  .hero .num{font-size:1.8rem}
  .stats3{grid-template-columns:1fr 1fr}
  .readout{grid-template-columns:1fr 1fr}
}
@media (prefers-reduced-motion: reduce){
  .stage .scanline,.dot,.skel{animation:none}
  .stage canvas.heat{transition:none}
}

/* place line, header buttons */
.hello .where{display:flex;align-items:center;gap:5px;font-style:normal;font-size:.74rem;color:var(--fg-2);margin-top:3px;line-height:1.35}
.hello .where svg{width:13px;height:13px;flex:none;color:var(--blue)}
.head-btns{display:flex;gap:10px;flex:none}

/* example notes & banner */
.gnote{display:grid;grid-template-columns:24px minmax(0,1fr);gap:10px;align-items:start;background:var(--blue-soft);border-radius:14px;padding:10px 12px;font-size:.8rem;line-height:1.45;color:var(--fg)}
.gnote b{width:24px;height:24px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:.72rem}
.banner{display:grid;grid-template-columns:44px minmax(0,1fr);gap:12px;align-items:center;background:var(--card);border:1.5px solid var(--blue-3);border-radius:18px;padding:12px 14px}
.banner .ic{width:44px;height:44px;border-radius:14px;background:var(--blue);color:#fff;display:grid;place-items:center}
.banner .ic svg{width:22px;height:22px}
.banner strong{display:block;font-size:.92rem}
.banner span{font-size:.78rem;color:var(--fg-2)}

/* step lists */
.mini-steps{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:12px}
.mini-steps li{display:grid;grid-template-columns:28px minmax(0,1fr);gap:12px;align-items:start}
.mini-steps b{width:28px;height:28px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-size:.78rem}
.mini-steps strong{display:block;font-size:.88rem;font-weight:600}
.mini-steps span{font-size:.78rem;color:var(--fg-2)}
.flow{display:grid;gap:0;margin-top:12px}
.flow-step{display:grid;grid-template-columns:48px minmax(0,1fr);gap:14px;position:relative;padding-bottom:18px}
.flow-step:not(:last-child)::before{content:"";position:absolute;left:23px;top:50px;bottom:4px;width:2px;background:var(--line)}
.flow-step .ic{position:relative;width:48px;height:48px;border-radius:16px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center}
.flow-step .ic svg{width:22px;height:22px}
.flow-step .ic b{position:absolute;top:-6px;right:-6px;width:20px;height:20px;border-radius:50%;background:var(--blue);color:#fff;font-size:.66rem;display:grid;place-items:center}
.flow-step strong{display:block;font-size:.92rem;font-weight:600;margin-top:2px}
.flow-step p{font-size:.8rem;color:var(--fg-2);margin-top:2px}
.defs{display:grid;gap:14px;margin-top:12px}
.defs strong{display:block;font-size:.86rem;font-weight:600}
.defs p{font-size:.8rem;color:var(--fg-2);margin-top:2px}
.ticks{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:10px}
.ticks li{display:grid;grid-template-columns:20px minmax(0,1fr);gap:10px;font-size:.82rem;color:var(--fg-2)}
.ticks svg{width:18px;height:18px;color:var(--blue);margin-top:1px}

/* ---------- tablet: wider single column, bottom bar stays ---------- */
@media (min-width:600px){
  .view{padding-left:max(32px, env(safe-area-inset-left, 0px), calc((100% - 640px) / 2));padding-right:max(32px, env(safe-area-inset-right, 0px), calc((100% - 640px) / 2))}
  .nav{border-radius:0;box-shadow:0 -1px 0 var(--line)}
  .nav button{grid-auto-flow:column;gap:8px;align-items:center;justify-content:center;font-size:.85rem;padding:10px}
  .onb{align-items:center;justify-content:center}
  .onb .box{max-width:460px;width:100%}
  .onb .art{flex:none;margin-bottom:24px}
}

/* ---------- small laptop / landscape tablet: two columns ---------- */
@media (min-width:900px){
  .view{padding-top:32px;padding-left:max(32px, env(safe-area-inset-left, 0px), calc((100% - 1120px) / 2));padding-right:max(32px, env(safe-area-inset-right, 0px), calc((100% - 1120px) / 2))}
  .cols{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;align-items:start}
  .col{display:grid;grid-auto-rows:max-content;gap:20px;min-width:0}
  .col.sticky{position:sticky;top:0}
  .title{text-align:left;font-size:1.5rem}
  .stage img{max-height:70vh}
  .onb{flex-direction:row;gap:48px;padding:48px}
  .onb .art{flex:1;max-width:420px;margin:0}
  .onb .art svg{width:100%}
}

/* ---------- laptop & desktop: side navigation ---------- */
@media (min-width:1100px){
  body{font-size:15px}
  .app{flex-direction:row}
  .nav{order:-1;width:248px;flex:none;display:flex;flex-direction:column;gap:6px;padding:28px 18px;border-radius:0;background:var(--card);box-shadow:1px 0 0 var(--line)}
  .brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:1.2rem;padding:0 10px 28px}
  .brand img{border-radius:10px}
  .nav button{grid-auto-flow:column;justify-content:start;gap:14px;font-size:.92rem;padding:13px 14px;border-radius:14px;color:var(--fg-2)}
  .nav button[aria-selected="true"]{background:var(--blue-soft);color:var(--blue)}
  .side-credit{display:block;margin-top:auto;padding:0 10px;font-size:.76rem;color:var(--fg-3)}
  .side-credit b{color:var(--fg-2)}
  .view{padding-top:40px;padding-bottom:40px;padding-left:max(48px, calc((100% - 1120px) / 2));padding-right:max(48px, calc((100% - 1120px) / 2))}
  .view > footer.credit{display:none}
  .hero{padding:32px 28px 28px}
  .hero .num{font-size:2.6rem}
}
@media (min-width:1500px){ .view{padding-left:calc((100% - 1240px) / 2);padding-right:calc((100% - 1240px) / 2)} }

/* ---------- short screens (phone in landscape) ---------- */
@media (max-height:500px) and (max-width:1099px){
  .view{padding-top:14px;gap:14px}
  .hero{padding:14px 18px}
  .hero .num{font-size:1.6rem}
  .hero .track{margin:8px auto 6px}
  .nav{padding-top:4px;padding-bottom:calc(4px + env(safe-area-inset-bottom, 0px))}
  .lens{aspect-ratio:16/7}
  .stage img{max-height:80vh}
}