/* AI by Q — shared design system for content + tool pages.
   Mirrors the landing page tokens so every page is one coherent brand. */
:root{
  --bg-0:#0a0b0e; --bg-1:#111319; --bg-2:#171a22; --bg-3:#1f2330;
  --line:#262b3a; --text:#e8eaf2; --dim:#9aa3b8;
  --accent:#7cf2c8; --accent-2:#4ea3ff; --danger:#ff5a6b; --gold:#ffd166;
  --r:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg-0); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6; -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
a.ul:hover{color:var(--accent)}
img{max-width:100%}
::selection{background:rgba(124,242,200,.25);color:var(--text)}
:focus-visible{outline:2px solid var(--accent-2);outline-offset:2px;border-radius:4px}
.wrap{max-width:1100px;margin:0 auto;padding:0 24px}
.narrow{max-width:760px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:var(--accent);color:#06281f;padding:8px 14px;border-radius:8px;z-index:200}

/* nav */
nav.top{position:sticky;top:0;z-index:50;background:rgba(10,11,14,.82);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
nav.top.scrolled{border-bottom-color:var(--line)}
nav.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{font-weight:800;font-size:19px;letter-spacing:-.02em}
.logo .q{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.nav-links a{color:var(--dim);font-size:14px}
.nav-links a:hover{color:var(--text)}
.nav-links a[href^="tel"]{color:var(--text);font-weight:600;font-variant-numeric:tabular-nums}
@media(max-width:760px){.nav-links a:not(.btn):not([href^="tel"]){display:none}}

/* buttons */
.btn{display:inline-block;background:linear-gradient(135deg,var(--accent),#5dd5a8);color:#06281f;font-weight:700;font-size:14px;padding:11px 20px;border-radius:10px;border:0;cursor:pointer;transition:filter .15s,transform .15s,box-shadow .15s;text-align:center}
.btn:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 6px 24px rgba(124,242,200,.25)}
.btn:active{transform:translateY(0);filter:brightness(.97)}
.btn.lg{padding:15px 28px;font-size:16px}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--text);box-shadow:none}
.btn.ghost:hover{border-color:var(--accent);filter:none}
.btn.block{display:block;width:100%}

/* hero / sections */
.hero{position:relative;padding:72px 0 40px;border-bottom:1px solid var(--line);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(124,242,200,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(124,242,200,.04) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 80% 60% at 50% 0,#000,transparent);pointer-events:none}
.hero .wrap{position:relative}
.eyebrow{color:var(--accent);font-weight:600;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:16px}
h1{font-size:clamp(34px,5.4vw,52px);line-height:1.06;font-weight:800;letter-spacing:-.025em;margin:0 0 18px}
.grad{background:linear-gradient(120deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.lede{color:var(--dim);font-size:clamp(17px,2.2vw,20px);max-width:680px;margin:0 0 24px}
.lede strong{color:var(--text);font-weight:600}
.block{padding:56px 0;border-bottom:1px solid var(--line)}
.block.tight{padding:40px 0}
h2{font-size:clamp(26px,3.4vw,36px);line-height:1.15;font-weight:800;letter-spacing:-.02em;margin:0 0 14px}
h3{font-size:20px;font-weight:700;margin:0 0 8px;letter-spacing:-.01em}
.section-eyebrow{color:var(--accent);font-weight:600;font-size:12px;letter-spacing:1.5px;text-transform:uppercase;margin:0 0 10px}
.sub{color:var(--dim);font-size:17px;max-width:680px;margin:0 0 28px}
p{margin:0 0 16px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}

/* cards / grids */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:820px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.card.lift{transition:border-color .2s,transform .2s}
.card.lift:hover{border-color:var(--accent);transform:translateY(-2px)}
.card .ico{font-size:22px;margin-bottom:10px}
.card p{color:var(--dim);margin:0}
.pill{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:rgba(17,19,25,.6);border-radius:999px;padding:6px 13px;font-size:13px;color:var(--dim)}
.pill::before{content:"\2713";color:var(--accent);font-weight:700}
.pills{display:flex;gap:10px;flex-wrap:wrap;margin:8px 0}

/* lists */
ul.check,ul.bullets{list-style:none;padding:0;margin:0 0 16px}
ul.check li{position:relative;padding:7px 0 7px 30px;color:var(--text)}
ul.check li::before{content:"\2713";position:absolute;left:0;top:7px;color:var(--accent);font-weight:800}
ul.bullets li{position:relative;padding:6px 0 6px 20px;color:var(--dim)}
ul.bullets li::before{content:"";position:absolute;left:2px;top:15px;width:6px;height:6px;border-radius:50%;background:var(--accent-2)}

/* prose (guides) */
.prose{max-width:740px}
.prose h2{margin-top:40px}
.prose h3{margin-top:28px;font-size:21px}
.prose p,.prose li{color:#cdd3e2;font-size:17px}
.prose ul{padding-left:22px}
.prose li{margin-bottom:8px}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.prose strong{color:var(--text)}
.prose blockquote{margin:20px 0;padding:14px 20px;border-left:3px solid var(--accent);background:var(--bg-1);border-radius:0 10px 10px 0;color:var(--text)}
.meta-line{color:var(--dim);font-size:14px;margin-bottom:8px}

/* tables */
table.cmp{width:100%;border-collapse:collapse;font-size:15px;margin:8px 0 20px}
table.cmp th,table.cmp td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}
table.cmp th{color:var(--dim);font-weight:600;font-size:13px;text-transform:uppercase;letter-spacing:.5px}
table.cmp td.good{color:var(--accent)}
table.cmp td.bad{color:var(--dim)}

/* FAQ */
details.faq{border:1px solid var(--line);border-radius:12px;padding:0;margin-bottom:10px;background:var(--bg-1);overflow:hidden}
details.faq summary{cursor:pointer;padding:16px 20px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";color:var(--accent);font-weight:700}
details.faq[open] summary::after{content:"\2212"}
details.faq .ans{padding:0 20px 18px;color:var(--dim)}

/* tool UI */
.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}
@media(max-width:820px){.tool-grid{grid-template-columns:1fr}}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--dim);margin-bottom:6px;font-weight:600}
.field .hint{font-weight:400;color:var(--dim);font-size:12px}
input,select,textarea{width:100%;background:var(--bg-2);border:1px solid var(--line);color:var(--text);border-radius:10px;padding:12px 14px;font-size:16px;font-family:inherit}
input:focus,select:focus,textarea:focus{border-color:var(--accent-2);outline:none}
input[type=range]{padding:0;accent-color:var(--accent)}
.result{background:var(--bg-1);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.result .big{font-size:clamp(34px,6vw,52px);font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1}
.result .big.danger{color:var(--danger)}
.result .big.mint{color:var(--accent)}
.kgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:16px 0}
.kgrid .k{background:var(--bg-2);padding:14px 16px}
.kgrid .k span{display:block;color:var(--dim);font-size:12px;text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}
.kgrid .k b{font-size:22px;font-variant-numeric:tabular-nums}
.gauge{height:14px;border-radius:999px;background:var(--bg-3);overflow:hidden;margin:10px 0}
.gauge > i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--danger),var(--gold),var(--accent));transition:width .5s}
.copybox{display:flex;gap:8px;margin:10px 0}
.copybox input{font-family:ui-monospace,Menlo,monospace;font-size:13px}
.note{font-size:13px;color:var(--dim)}

/* CTA band */
.cta-band{background:linear-gradient(135deg,rgba(124,242,200,.08),rgba(78,163,255,.08));border:1px solid var(--line);border-radius:18px;padding:36px;text-align:center;margin:8px 0}
.cta-band h2{margin-bottom:10px}

/* breadcrumb */
.crumb{font-size:13px;color:var(--dim);padding:14px 0;display:flex;gap:8px;flex-wrap:wrap}
.crumb a:hover{color:var(--accent)}
.crumb span{color:#4a5266}

/* footer */
footer{padding:44px 0 60px;color:var(--dim);font-size:14px}
footer .cols{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
footer .flinks{display:flex;flex-direction:column;gap:8px}
footer .flinks a:hover{color:var(--accent)}
footer .fcol h4{color:var(--text);font-size:13px;text-transform:uppercase;letter-spacing:.6px;margin:0 0 10px}

.center{text-align:center}
.mt0{margin-top:0}.mb0{margin-bottom:0}
.hidden{display:none}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}