/* ============================================================
   Utilo — utilo.xyz — shared stylesheet
   Premium dark theme · glassmorphism · subtle 3D hover
   Mobile-first, zero external dependencies.
   ============================================================ */
:root{
  --bg0:#060a15;
  --bg1:#0a1020;
  --card:rgba(255,255,255,.045);
  --card-strong:rgba(255,255,255,.07);
  --stroke:rgba(255,255,255,.10);
  --text:#eef2ff;
  --muted:#98a2c0;
  --a1:#7c5cff;
  --a2:#22d3ee;
  --good:#34d399;
  --warn:#fbbf24;
  --bad:#f87171;
  --grad:linear-gradient(135deg,var(--a1),var(--a2));
  --r:18px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:
    radial-gradient(900px 480px at 85% -5%,rgba(124,92,255,.16),transparent 60%),
    radial-gradient(800px 460px at -10% 20%,rgba(34,211,238,.10),transparent 60%),
    var(--bg0);
  color:var(--text);
  line-height:1.65;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
a{color:var(--a2);text-decoration:none}
a:hover{text-decoration:underline}
img,canvas,svg{max-width:100%}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(6,10,21,.78);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--stroke);
}
.header-inner{display:flex;align-items:center;gap:18px;padding:14px 20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.35rem;color:var(--text);letter-spacing:.2px}
.logo:hover{text-decoration:none}
.logo-mark{width:34px;height:34px;flex:0 0 34px}
.nav{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.nav::-webkit-scrollbar{display:none}
.nav a{
  color:var(--muted);font-size:.92rem;font-weight:600;white-space:nowrap;
  padding:8px 12px;border-radius:10px;
}
.nav a:hover,.nav a.active{color:var(--text);background:rgba(255,255,255,.06);text-decoration:none}

/* ---------- hero ---------- */
.hero{padding:72px 0 46px;text-align:center;position:relative}
.hero-badge{
  display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:#0b1020;background:var(--grad);padding:6px 16px;border-radius:999px;margin-bottom:18px;
}
.hero h1{font-size:clamp(2rem,5.4vw,3.4rem);line-height:1.12;letter-spacing:-.02em;margin-bottom:16px}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:var(--muted);font-size:clamp(1rem,2.4vw,1.2rem);max-width:640px;margin:0 auto 28px}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;font-weight:700;font-size:1rem;color:var(--text);
  background:var(--card-strong);border:1px solid var(--stroke);
  padding:13px 26px;border-radius:14px;cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-primary{background:var(--grad);border:none;color:#0b1020;box-shadow:0 8px 28px rgba(124,92,255,.35)}
.btn-primary:hover{box-shadow:0 12px 34px rgba(34,211,238,.4)}
.btn-block{width:100%;text-align:center}

/* ---------- sections ---------- */
.section{padding:52px 0}
.section-title{font-size:clamp(1.5rem,3.6vw,2.1rem);letter-spacing:-.01em;margin-bottom:8px;text-align:center}
.section-sub{color:var(--muted);text-align:center;max-width:620px;margin:0 auto 34px}

/* ---------- tool grid cards ---------- */
.tool-grid{display:grid;grid-template-columns:1fr;gap:18px}
.tool-card{
  display:block;background:var(--card);border:1px solid var(--stroke);border-radius:var(--r);
  padding:26px;color:var(--text);position:relative;overflow:hidden;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;
}
.tool-card::before{
  content:"";position:absolute;inset:0;opacity:0;transition:opacity .35s ease;
  background:radial-gradient(420px 200px at 50% -20%,rgba(124,92,255,.22),transparent 70%);
}
.tool-card:hover{transform:perspective(900px) rotateX(4deg) rotateY(-4deg) translateY(-6px);box-shadow:0 22px 50px rgba(0,0,0,.5);border-color:rgba(124,92,255,.45);text-decoration:none}
.tool-card:hover::before{opacity:1}
.tool-card .ticon{width:52px;height:52px;border-radius:14px;background:var(--grad);display:flex;align-items:center;justify-content:center;margin-bottom:16px;box-shadow:0 6px 18px rgba(124,92,255,.35)}
.tool-card .ticon svg{width:26px;height:26px}
.tool-card h3{font-size:1.18rem;margin-bottom:8px}
.tool-card p{color:var(--muted);font-size:.95rem}
.tool-card .go{display:inline-block;margin-top:14px;font-weight:700;font-size:.92rem}

/* ---------- features / steps ---------- */
.feat-grid{display:grid;grid-template-columns:1fr;gap:18px}
.feat{background:var(--card);border:1px solid var(--stroke);border-radius:var(--r);padding:26px;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.feat h3{margin-bottom:8px;font-size:1.08rem}
.feat p{color:var(--muted);font-size:.95rem}
.steps{display:grid;grid-template-columns:1fr;gap:18px;counter-reset:step}
.step{background:var(--card);border:1px solid var(--stroke);border-radius:var(--r);padding:26px;position:relative}
.step::before{
  counter-increment:step;content:counter(step);
  width:40px;height:40px;border-radius:12px;background:var(--grad);color:#0b1020;
  font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:14px;font-size:1.15rem;
}
.step h3{margin-bottom:8px}
.step p{color:var(--muted);font-size:.95rem}

/* ---------- FAQ ---------- */
.faq{max-width:760px;margin:0 auto;display:grid;gap:12px}
.faq details{background:var(--card);border:1px solid var(--stroke);border-radius:14px;padding:18px 20px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--a2);flex:0 0 auto}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);margin-top:12px;font-size:.96rem}

/* ---------- tool shell ---------- */
.tool-shell{
  background:var(--card);border:1px solid var(--stroke);border-radius:22px;
  padding:clamp(20px,4vw,36px);margin:26px 0;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  box-shadow:0 24px 60px rgba(0,0,0,.35);
}
.prose{max-width:760px}
.prose h2{font-size:1.4rem;margin:34px 0 12px}
.prose p{color:var(--muted);margin-bottom:14px}
.prose ol,.prose ul{color:var(--muted);margin:0 0 16px 22px}
.prose li{margin-bottom:8px}
.page-head{text-align:center;padding:52px 0 8px}
.page-head h1{font-size:clamp(1.8rem,4.6vw,2.7rem);letter-spacing:-.02em;margin-bottom:12px}
.page-head .kicker{color:var(--a2);font-weight:700;font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px}
.page-head p.lead{color:var(--muted);max-width:680px;margin:0 auto}

/* ---------- forms ---------- */
.field{margin-bottom:18px}
.field label{display:block;font-weight:700;margin-bottom:8px;font-size:.95rem}
.field .hint{font-weight:400;color:var(--muted);font-size:.85rem}
input[type=text],input[type=number],input[type=url],input[type=email],input[type=password],input[type=tel],textarea,select{
  width:100%;background:rgba(0,0,0,.35);border:1px solid var(--stroke);color:var(--text);
  border-radius:12px;padding:13px 15px;font-size:1rem;font-family:inherit;
}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--a1);box-shadow:0 0 0 3px rgba(124,92,255,.25)}
textarea{min-height:170px;resize:vertical}
.grid2{display:grid;grid-template-columns:1fr;gap:16px}
input[type=range]{width:100%;accent-color:var(--a1);height:34px}
.range-val{font-weight:800;color:var(--a2)}
.switch-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px dashed rgba(255,255,255,.08)}
.switch{position:relative;width:52px;height:30px;flex:0 0 52px}
.switch input{opacity:0;width:100%;height:100%;position:absolute;cursor:pointer;margin:0;z-index:2}
.knob{position:absolute;inset:0;background:rgba(255,255,255,.12);border-radius:999px;transition:.25s;border:1px solid var(--stroke)}
.knob::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;transition:.25s}
.switch input:checked + .knob{background:var(--grad)}
.switch input:checked + .knob::after{transform:translateX(22px)}

/* ---------- dropzone / preview ---------- */
.dropzone{
  border:2px dashed rgba(124,92,255,.5);border-radius:var(--r);padding:38px 20px;text-align:center;
  cursor:pointer;transition:.25s;background:rgba(124,92,255,.05);
}
.dropzone:hover,.dropzone.over{background:rgba(124,92,255,.12);border-color:var(--a2)}
.dropzone p{color:var(--muted)}
.preview-box{display:grid;grid-template-columns:1fr;gap:16px;margin-top:18px}
.preview-card{background:rgba(0,0,0,.3);border:1px solid var(--stroke);border-radius:14px;padding:16px;text-align:center}
.preview-card img,.preview-card canvas{border-radius:10px;background:#111}
.stat-row{display:flex;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.08);font-size:.95rem}
.stat-row:last-child{border-bottom:none}
.stat-row b{color:var(--text)}
.stat-row .ok{color:var(--good);font-weight:800}
.note{font-size:.88rem;color:var(--muted);background:rgba(52,211,153,.08);border:1px solid rgba(52,211,153,.25);border-radius:12px;padding:12px 16px;margin-top:16px}

/* ---------- results / meters ---------- */
.result-line{font-size:1.05rem;margin:10px 0}
.result-line b{color:var(--a2)}
.meter{height:12px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;margin:10px 0 4px}
.meter > div{height:100%;border-radius:999px;background:var(--grad);width:0;transition:width .4s ease}
.meter-label{font-size:.85rem;color:var(--muted)}
.output-pass{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;word-break:break-all;background:rgba(0,0,0,.45);border:1px solid var(--stroke);border-radius:12px;padding:16px;font-size:1.05rem;margin:14px 0}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.chip{font-size:.82rem;background:rgba(255,255,255,.06);border:1px solid var(--stroke);padding:5px 12px;border-radius:999px;color:var(--muted)}

/* ---------- donut / table ---------- */
.donut-wrap{display:flex;flex-wrap:wrap;gap:26px;align-items:center;margin:22px 0}
.donut{width:190px;height:190px;border-radius:50%;flex:0 0 190px;position:relative;box-shadow:0 10px 30px rgba(0,0,0,.4)}
.donut::after{content:"";position:absolute;inset:34px;background:var(--bg1);border-radius:50%}
.donut-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:2}
.donut-center b{font-size:1.25rem}
.donut-center span{font-size:.78rem;color:var(--muted)}
.legend{display:grid;gap:8px;font-size:.92rem}
.legend i{display:inline-block;width:12px;height:12px;border-radius:4px;margin-right:8px}
table.data{width:100%;border-collapse:collapse;font-size:.9rem;margin-top:14px}
table.data th,table.data td{padding:10px 12px;text-align:right;border-bottom:1px solid rgba(255,255,255,.07)}
table.data th:first-child,table.data td:first-child{text-align:left}
table.data th{color:var(--muted);font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.06em}
table.data tr:hover td{background:rgba(255,255,255,.03)}

/* ---------- related tools ---------- */
.related{margin-top:40px}
.related-grid{display:grid;grid-template-columns:1fr;gap:14px}
.related a{display:block;background:var(--card);border:1px solid var(--stroke);border-radius:14px;padding:16px 18px;color:var(--text);font-weight:700;transition:transform .25s ease}
.related a:hover{transform:translateY(-3px);text-decoration:none;border-color:rgba(124,92,255,.45)}
.related a span{display:block;font-weight:400;color:var(--muted);font-size:.88rem;margin-top:4px}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--stroke);margin-top:60px;background:rgba(0,0,0,.3)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:28px;padding:44px 20px 20px}
.footer-brand p{color:var(--muted);font-size:.92rem;max-width:320px;margin-top:10px}
.footer-col h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:14px}
.footer-col a{display:block;color:var(--muted);font-size:.93rem;margin-bottom:10px}
.footer-col a:hover{color:var(--text)}
.footer-bottom{border-top:1px solid var(--stroke);padding:18px 20px;text-align:center;color:var(--muted);font-size:.85rem}

/* ---------- responsive ---------- */
@media(min-width:640px){
  .tool-grid{grid-template-columns:1fr 1fr}
  .feat-grid{grid-template-columns:1fr 1fr}
  .related-grid{grid-template-columns:1fr 1fr}
  .grid2{grid-template-columns:1fr 1fr}
  .preview-box{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
}
@media(min-width:960px){
  .tool-grid{grid-template-columns:1fr 1fr 1fr}
  .steps{grid-template-columns:1fr 1fr 1fr}
  .feat-grid{grid-template-columns:1fr 1fr 1fr}
}

/* ---------- newsletter ---------- */
.newsletter{margin-top:18px;max-width:340px}
.newsletter label{display:block;font-size:.88rem;font-weight:700;margin-bottom:8px;color:var(--muted)}
.nl-row{display:flex;gap:8px}
.nl-row input{flex:1;min-width:0}
.nl-row .btn{padding:13px 18px;white-space:nowrap;font-size:.92rem}
.nl-msg{font-size:.85rem;margin-top:8px;min-height:1.3em}

/* ---------- article layout with sidebar ---------- */
.article-layout{display:grid;grid-template-columns:1fr;gap:28px;align-items:start}
.sidebar .side-card{background:var(--card);border:1px solid var(--stroke);border-radius:var(--r);padding:22px;margin-bottom:18px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.sidebar h3{font-size:1rem;margin-bottom:12px}
.sidebar ul{list-style:none}
.sidebar li{margin-bottom:10px}
.sidebar a{font-size:.92rem}
.post-meta{font-size:.85rem;color:var(--muted);margin-bottom:14px}
.post-card{display:block}
@media(min-width:900px){.article-layout{grid-template-columns:2.3fr 1fr}}

/* ---------- affiliate box ---------- */
.affil-box{background:rgba(124,92,255,.07);border:1px solid rgba(124,92,255,.35);border-radius:var(--r);padding:24px;margin:30px 0}
.affil-box h3{margin-bottom:10px}
.affil-box .disclosure{font-size:.85rem;color:var(--muted);background:rgba(0,0,0,.28);border:1px solid var(--stroke);border-radius:10px;padding:12px 14px;margin-bottom:14px}
.affil-box ul{margin:0 0 0 20px;color:var(--muted)}
.affil-box li{margin-bottom:8px}

/* ============================================================
   PREMIUM 3D LAYER — interactive depth, motion & scroll effects
   ============================================================ */

/* thin gradient scroll-progress bar */
.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:90;pointer-events:none}
.scroll-progress i{display:block;height:100%;background:var(--grad);transform:scaleX(0);transform-origin:0 50%;box-shadow:0 0 14px rgba(124,92,255,.8)}

/* floating 3D ambient orbs */
.hero,.page-head{position:relative;overflow:hidden}
.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.45;pointer-events:none;z-index:0;animation:orb-drift 16s ease-in-out infinite alternate;will-change:transform,translate}
.orb-a{width:340px;height:340px;left:-90px;top:-70px;background:radial-gradient(circle,#7c5cff,transparent 65%)}
.orb-b{width:280px;height:280px;right:-70px;top:6px;background:radial-gradient(circle,#22d3ee,transparent 65%);animation-delay:-6s;animation-duration:19s}
.orb-c{width:200px;height:200px;left:38%;bottom:-100px;background:radial-gradient(circle,#a78bfa,transparent 65%);animation-delay:-11s;animation-duration:23s;opacity:.32}
@keyframes orb-drift{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(48px,36px,0) scale(1.14)}}
.hero>*:not(.orb),.page-head>*:not(.orb){position:relative;z-index:1}

/* header gains depth after scrolling */
.site-header{transition:box-shadow .3s ease,background-color .3s ease}
.site-header.scrolled{background:rgba(6,10,21,.93);box-shadow:0 14px 44px rgba(0,0,0,.5)}

/* scroll-triggered reveals (active only when JS effects run) */
html.fx .reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s cubic-bezier(.16,1,.3,1)}
html.fx .reveal.visible{opacity:1;transform:none}
@media(min-width:640px){
  html.fx .tool-grid .reveal:nth-child(2){transition-delay:.08s}
  html.fx .tool-grid .reveal:nth-child(3){transition-delay:.16s}
  html.fx .tool-grid .reveal:nth-child(4){transition-delay:.24s}
  html.fx .tool-grid .reveal:nth-child(5){transition-delay:.32s}
  html.fx .tool-grid .reveal:nth-child(6){transition-delay:.4s}
  html.fx .tool-grid .reveal:nth-child(7){transition-delay:.48s}
  html.fx .tool-grid .reveal:nth-child(8){transition-delay:.56s}
}

/* pointer-tracked 3D tilt on cards */
.tilt{--rx:0deg;--ry:0deg;transform-style:preserve-3d}
.tool-card.tilt{transition:transform .16s ease-out,box-shadow .35s ease,border-color .35s ease}
.tool-card.tilt:hover{transform:perspective(950px) rotateX(var(--rx)) rotateY(var(--ry)) translateY(-8px);box-shadow:0 30px 64px rgba(0,0,0,.55),0 0 46px rgba(124,92,255,.16);border-color:rgba(124,92,255,.5)}
.tool-card.tilt .ticon{transform:translateZ(34px)}

/* deeper button feedback */
.btn{transition:transform .18s ease,box-shadow .25s ease,filter .25s ease}
.btn:hover{transform:translateY(-3px)}
.btn:active{transform:translateY(1px) scale(.98)}
.btn-primary:hover{box-shadow:0 16px 42px rgba(124,92,255,.5),0 0 26px rgba(34,211,238,.28);filter:brightness(1.07)}

/* gentle lift on content cards */
.feat,.step,.post-card,.side-card{transition:transform .3s ease,box-shadow .3s ease}
.feat:hover,.step:hover{transform:translateY(-5px);box-shadow:0 20px 46px rgba(0,0,0,.45)}

/* respect reduced motion */
@media (prefers-reduced-motion:reduce){
  .orb{animation:none}
  html.fx .reveal{opacity:1;transform:none;transition:none}
  .tilt,.tool-card.tilt,.btn,.feat,.step{transition:none}
  html{scroll-behavior:auto}
}