/* USPhotoTools - shared styles. Mobile first. */
:root{
  --blue:#0B3D91;--blue-dark:#082c69;--blue-tint:#EEF3FB;
  --red:#B22234;
  --bg:#FFFFFF;--text:#1A202C;--muted:#718096;--line:#E2E8F0;--soft:#F7F9FC;
  --ok:#1F8A4C;--warn:#B7791F;--bad:#B22234;
  --r:12px;--shadow:0 4px 12px rgba(0,0,0,.08);
  --font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);font-weight:400;color:var(--text);background:var(--bg);line-height:1.6;font-size:16px}
img,canvas,svg{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid #6C9BE8;outline-offset:2px;border-radius:6px}
h1,h2,h3,h4{font-weight:700;line-height:1.2;letter-spacing:-.01em;color:var(--text)}
h1{font-size:clamp(1.8rem,5vw,3rem)}
h2{font-size:clamp(1.4rem,3.4vw,2rem)}
h3{font-size:1.1rem}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:600;font-size:.95rem;padding:12px 20px;border-radius:var(--r);border:1px solid var(--blue);background:var(--blue);color:#fff;cursor:pointer;transition:background .15s,transform .05s}
.btn:hover{background:var(--blue-dark);text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:#fff;color:var(--blue)}
.btn.ghost:hover{background:var(--blue-tint)}
.btn[disabled]{opacity:.45;cursor:not-allowed}

/* Header */
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:16px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--blue);letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo .mark{width:32px;height:32px;border-radius:9px;background:var(--blue);display:grid;place-items:center}
.logo b{color:var(--red);font-weight:700}
nav.main{margin-left:auto;display:none;gap:4px}
nav.main a{color:var(--text);font-weight:500;font-size:.93rem;padding:8px 12px;border-radius:8px}
nav.main a:hover,nav.main a[aria-current]{background:var(--blue-tint);color:var(--blue);text-decoration:none}
.icon-btn{margin-left:auto;background:none;border:0;width:40px;height:40px;border-radius:10px;display:grid;place-items:center;cursor:pointer;color:var(--text)}
.icon-btn:hover{background:var(--blue-tint)}
.search-btn{margin-left:0}
#menuBtn{margin-left:auto}
nav.drawer{display:none;border-top:1px solid var(--line);padding:8px 20px 16px;background:#fff}
nav.drawer.open{display:block}
nav.drawer a{display:block;padding:12px 0;color:var(--text);font-weight:500;border-bottom:1px solid var(--line)}
.search-pop{display:none;border-top:1px solid var(--line);padding:12px 20px;background:#fff}
.search-pop.open{display:block}
.search-pop input{width:100%;font:inherit;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r)}
.search-pop ul{list-style:none;margin-top:8px}
.search-pop li a{display:block;padding:10px 4px;color:var(--text)}
@media(min-width:960px){nav.main{display:flex}#menuBtn{display:none}.search-btn{margin-left:0}nav.drawer{display:none!important}}

/* Hero */
.hero{min-height:60vh;display:flex;align-items:center;padding:48px 0 40px;background:linear-gradient(180deg,var(--soft),#fff)}
.hero .wrap{text-align:center;max-width:820px}
.hero h1{color:var(--blue);margin-bottom:14px}
.hero p.sub{color:var(--muted);font-size:1.1rem;max-width:620px;margin:0 auto 28px}
.trust{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;margin-top:20px;font-size:.88rem;color:var(--muted)}
.trust span:before{content:"✓ ";color:var(--ok);font-weight:700}

/* Drop zone */
.drop{display:block;border:2px dashed #9DB5DE;background:#fff;border-radius:16px;padding:36px 20px;cursor:pointer;transition:border-color .15s,background .15s;text-align:center}
.drop:hover,.drop.over{border-color:var(--blue);background:var(--blue-tint)}
.drop .ico{width:56px;height:56px;border-radius:50%;background:var(--blue-tint);display:grid;place-items:center;margin:0 auto 12px}
.drop strong{display:block;font-size:1.15rem;color:var(--text)}
.drop small{color:var(--muted);font-size:.92rem}
.drop input{position:absolute;width:1px;height:1px;opacity:0}
.drop.hidden{display:none}

/* Tool */
.tool-sec{padding:48px 0}
.tool-layout{display:grid;gap:24px}
.tool-grid{display:grid;gap:24px;align-items:start}
.panel{border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);background:#fff;padding:20px}
.panel h2{font-size:1.15rem;margin-bottom:14px}
.stage-wrap{position:relative;width:100%;max-width:460px;margin:0 auto;aspect-ratio:1/1;background:repeating-conic-gradient(#f1f4f9 0 25%,#fff 0 50%) 0 0/20px 20px;border:1px solid var(--line);border-radius:10px;overflow:hidden;touch-action:none}
.stage-wrap.bgmode{aspect-ratio:auto;min-height:260px}
#stage{width:100%;height:100%;cursor:grab}
.stage-wrap.bgmode #stage{height:auto;cursor:default}
#stage:active{cursor:grabbing}
.guides{position:absolute;inset:0;pointer-events:none;width:100%;height:100%}
.guides.off{display:none}
.busy{position:absolute;inset:0;background:rgba(255,255,255,.85);display:none;flex-direction:column;align-items:center;justify-content:center;gap:12px;font-weight:600;color:var(--blue);text-align:center;padding:16px}
.busy.on{display:flex}
.spin{width:30px;height:30px;border-radius:50%;border:3px solid var(--blue-tint);border-top-color:var(--blue);animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.ctrl{display:flex;align-items:center;gap:12px;margin-top:16px;max-width:460px;margin-inline:auto}
.ctrl label{font-size:.9rem;font-weight:600;white-space:nowrap}
.ctrl input[type=range]{flex:1;accent-color:var(--blue)}
.hint{max-width:460px;margin:8px auto 0;font-size:.85rem;color:var(--muted);text-align:center}
.checks{list-style:none;display:grid;gap:10px;margin-bottom:20px}
.checks li{display:flex;gap:12px;align-items:flex-start;padding:12px;border-radius:10px;background:var(--soft);border:1px solid var(--line)}
.checks .st{flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-size:.85rem;font-weight:700;color:#fff;background:#CBD5E0}
.checks li.ok .st{background:var(--ok)}
.checks li.warn .st{background:var(--warn)}
.checks li.bad .st{background:var(--bad)}
.checks b{display:block;font-size:.95rem}
.checks span.d{font-size:.86rem;color:var(--muted)}
.actions{display:grid;gap:10px}
.actions .btn{width:100%}
.reset{margin-top:12px;background:none;border:0;color:var(--muted);font:inherit;font-size:.9rem;text-decoration:underline;cursor:pointer}
.note{font-size:.84rem;color:var(--muted);margin-top:14px}
.privacy-note{display:flex;gap:8px;align-items:flex-start;font-size:.85rem;color:var(--muted);margin-top:16px}

/* Ads */
.ad-slot{display:block;text-align:center;min-height:0}
.ad-slot.box{margin:20px auto;max-width:728px}
.ad-label{font-size:.7rem;color:var(--muted);text-align:center;margin-bottom:4px}
.ad-sidebar{display:none}
.ad-adsense{margin:20px auto;max-width:728px;text-align:center}
@media(min-width:1100px){
  .tool-layout.has-sidebar{grid-template-columns:minmax(0,1fr) 300px;align-items:start}
  .tool-layout.has-sidebar .ad-sidebar{display:block;position:sticky;top:84px;width:300px}
  .ad-sidebar .slot-300{min-height:250px;width:300px}
}
@media(min-width:760px){.tool-grid{grid-template-columns:1fr 1fr}.actions{grid-template-columns:1fr}}

/* Sections */
section.blk{padding:56px 0}
section.blk.tint{background:var(--soft)}
.sec-head{text-align:center;max-width:640px;margin:0 auto 36px}
.sec-head p{color:var(--muted);margin-top:8px}
.feat{display:grid;gap:16px}
.feat a.card{display:block;border:1px solid var(--line);border-radius:var(--r);padding:22px;background:#fff;color:var(--text);transition:box-shadow .15s,border-color .15s}
.feat a.card:hover{box-shadow:var(--shadow);border-color:#C3D3EE;text-decoration:none}
.feat .ci{width:44px;height:44px;border-radius:11px;background:var(--blue-tint);display:grid;place-items:center;margin-bottom:14px}
.feat h3{margin-bottom:6px}
.feat p{color:var(--muted);font-size:.93rem}
@media(min-width:640px){.feat{grid-template-columns:repeat(2,1fr)}}
@media(min-width:960px){.feat{grid-template-columns:repeat(3,1fr)}}
.steps{display:grid;gap:20px;counter-reset:s}
.step{text-align:center;padding:8px 12px}
.step .si{width:64px;height:64px;border-radius:50%;background:var(--blue);display:grid;place-items:center;margin:0 auto 14px}
.step h3{margin-bottom:6px}
.step p{color:var(--muted);font-size:.95rem}
@media(min-width:760px){.steps{grid-template-columns:repeat(3,1fr)}}
.faq{max-width:780px;margin:0 auto}
.faq details{border:1px solid var(--line);border-radius:var(--r);background:#fff;margin-bottom:10px}
.faq summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:600;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";font-size:1.3rem;line-height:1;color:var(--blue)}
.faq details[open] summary:after{content:"–"}
.faq .ans{padding:0 18px 16px;color:#2D3748}
.prose{max-width:780px;margin:0 auto;padding:48px 20px 64px}
.prose h1{font-size:clamp(1.8rem,4.5vw,2.4rem);color:var(--blue);margin-bottom:16px}
.prose h2{margin:32px 0 10px}
.prose p,.prose ul,.prose ol{margin-bottom:14px}
.prose ul,.prose ol{padding-left:22px}
.prose li{margin-bottom:6px}
.rules{width:100%;border-collapse:collapse;margin:12px 0 20px;font-size:.95rem}
.rules th,.rules td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}
.rules th{background:var(--soft);font-weight:600}
.tabs-wrap{overflow-x:auto}
.disclaimer{background:var(--blue-tint);border:1px solid #C9D8F2;border-radius:var(--r);padding:14px 16px;font-size:.9rem;color:#2A3B5C}

/* Footer */
footer.site{background:var(--soft);border-top:1px solid var(--line);padding:48px 0 24px;margin-top:0}
.fgrid{display:grid;gap:28px;grid-template-columns:repeat(2,1fr)}
.fgrid h4{font-size:.95rem;margin-bottom:12px}
.fgrid ul{list-style:none}
.fgrid li{margin-bottom:8px}
.fgrid a{color:#4A5568;font-size:.93rem}
.fbottom{margin-top:36px;padding-top:20px;border-top:1px solid var(--line);font-size:.85rem;color:var(--muted);display:grid;gap:8px}
@media(min-width:760px){.fgrid{grid-template-columns:repeat(4,1fr)}}
.footer-ad{margin-top:20px}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}