/* =====================================================================
   PlumbPilots — premium dark design system
   Inspired by Linear / Stripe / Vercel. Dark-first, glassmorphism,
   soft gradients, premium shadows, accessible focus states.
   ===================================================================== */
:root{
  --bg:#07080c;
  --bg-2:#0b0d14;
  --panel:rgba(255,255,255,.035);
  --panel-solid:#10131c;
  --glass:rgba(255,255,255,.05);
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.16);
  --ink:#f4f6fb;
  --ink-soft:#9aa3b2;
  --ink-dim:#6b7280;
  --brand:#6d8bff;
  --brand-2:#8b5cf6;
  --brand-3:#22d3ee;
  --grad:linear-gradient(120deg,#6d8bff 0%,#8b5cf6 45%,#22d3ee 100%);
  --grad-soft:linear-gradient(120deg,rgba(109,139,255,.18),rgba(139,92,246,.14) 50%,rgba(34,211,238,.12));
  --ok:#34d399; --warn:#fbbf24; --bad:#f87171;
  --shadow:0 1px 0 rgba(255,255,255,.04) inset,0 18px 50px -20px rgba(0,0,0,.8);
  --shadow-lg:0 40px 120px -30px rgba(0,0,0,.85);
  --glow:0 12px 40px -8px rgba(109,139,255,.55);
  --radius:18px; --radius-sm:12px; --radius-lg:26px; --maxw:1160px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
}
[data-theme="light"]{
  --bg:#ffffff; --bg-2:#f6f7fb; --panel:#ffffff; --panel-solid:#ffffff; --glass:rgba(15,18,30,.02);
  --line:#e6e8ef; --line-strong:#d6dae5; --ink:#0c1020; --ink-soft:#5b6473; --ink-dim:#8b94a3;
  --shadow:0 1px 2px rgba(15,23,42,.06),0 18px 40px -24px rgba(15,23,42,.35);
  --shadow-lg:0 40px 90px -40px rgba(15,23,42,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);
  line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
/* ambient backdrop */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(60% 50% at 50% -10%,rgba(109,139,255,.18),transparent 60%),
    radial-gradient(45% 40% at 85% 0%,rgba(34,211,238,.10),transparent 60%),
    radial-gradient(50% 45% at 10% 5%,rgba(139,92,246,.12),transparent 60%);
}
[data-theme="light"] body::before{opacity:.5}
a{color:inherit;text-decoration:none}
img,svg,iframe{max-width:100%;display:block}
::selection{background:rgba(109,139,255,.35);color:#fff}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:104px 0}
.section.tight{padding:64px 0}
.center{text-align:center}
.muted{color:var(--ink-soft)}
.dim{color:var(--ink-dim)}

/* focus — accessible everywhere */
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
a:focus-visible,button:focus-visible{outline-offset:3px}
.skip{position:absolute;left:-999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:200}
.skip:focus{left:0}

/* Typography */
h1,h2,h3,h4{margin:0 0 .4em;font-weight:700;letter-spacing:-.025em;line-height:1.08}
.display{font-size:clamp(42px,6.6vw,80px);font-weight:800;letter-spacing:-.045em;line-height:1.02}
h2{font-size:clamp(30px,4.4vw,50px);letter-spacing:-.035em}
h3{font-size:clamp(19px,2.3vw,24px)}
.lede{font-size:clamp(17px,2vw,21px);color:var(--ink-soft);max-width:660px;line-height:1.6}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.02em;
  color:var(--ink);padding:6px 13px;border:1px solid var(--line);border-radius:999px;background:var(--glass);backdrop-filter:blur(10px)}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--brand-3);box-shadow:0 0 10px var(--brand-3)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* Buttons */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-weight:600;font-size:15.5px;padding:13px 22px;border-radius:12px;border:1px solid transparent;cursor:pointer;
  transition:transform .18s cubic-bezier(.2,.7,.2,1),box-shadow .25s,background .2s,border-color .2s,opacity .2s;white-space:nowrap}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 50px -10px rgba(109,139,255,.7)}
.btn-ghost{background:var(--glass);color:var(--ink);border-color:var(--line);backdrop-filter:blur(10px)}
.btn-ghost:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.btn-soft{background:transparent;color:var(--ink-soft);border-color:transparent}
.btn-soft:hover{color:var(--ink)}
.btn-lg{font-size:17px;padding:16px 28px;border-radius:14px}
.btn-block{width:100%}
.btn[disabled]{opacity:.65;cursor:not-allowed;transform:none}
.btn .spin{width:16px;height:16px;border-radius:50%;border:2px solid rgba(255,255,255,.45);border-top-color:#fff;animation:spin .7s linear infinite;display:none}
.btn.loading .spin{display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* Nav */
.nav{position:sticky;top:0;z-index:100;border-bottom:1px solid transparent;transition:border-color .3s,background .3s}
.nav.scrolled{background:color-mix(in srgb,var(--bg) 72%,transparent);backdrop-filter:saturate(160%) blur(16px);border-bottom-color:var(--line)}
.nav .row{display:flex;align-items:center;gap:10px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.02em}
.logo .mk{width:30px;height:30px;border-radius:9px;background:var(--grad);display:grid;place-items:center;color:#fff;font-size:15px;box-shadow:var(--glow)}
.navlinks{display:flex;gap:4px;margin-left:22px}
.navlinks a{padding:8px 13px;border-radius:10px;font-size:14.5px;color:var(--ink-soft);font-weight:500;transition:color .2s,background .2s}
.navlinks a:hover{color:var(--ink);background:var(--glass)}
.navlinks a.active{color:var(--ink)}
.navright{margin-left:auto;display:flex;align-items:center;gap:10px}
.tgl{width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:var(--glass);color:var(--ink);cursor:pointer;font-size:16px;display:grid;place-items:center;transition:transform .3s,border-color .2s}
.tgl:hover{transform:rotate(18deg);border-color:var(--line-strong)}
.burger{display:none;width:42px;height:42px;border:1px solid var(--line);background:var(--glass);border-radius:11px;color:var(--ink);font-size:18px;cursor:pointer}
.mobile-menu{display:none}

/* Hero */
.hero{position:relative;padding:96px 0 64px;overflow:hidden}
.hero .lede{margin:0 auto}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:32px}
.subtrust{margin-top:18px;font-size:13.5px;color:var(--ink-soft);display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.subtrust b{color:var(--ink)}

/* Glass card / product mock */
.glass{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);backdrop-filter:blur(14px);box-shadow:var(--shadow)}
.mock{margin:56px auto 0;max-width:980px;border-radius:var(--radius-lg);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));backdrop-filter:blur(16px);box-shadow:var(--shadow-lg);overflow:hidden}
.mock .bar{display:flex;align-items:center;gap:7px;padding:13px 16px;border-bottom:1px solid var(--line)}
.mock .bar i{width:11px;height:11px;border-radius:50%;background:rgba(255,255,255,.18)}
.mock .bar i:nth-child(1){background:#ff5f57}.mock .bar i:nth-child(2){background:#febc2e}.mock .bar i:nth-child(3){background:#28c840}
.mock .bar .u{margin-left:10px;font-size:12px;color:var(--ink-dim)}
.mock .body{display:grid;grid-template-columns:1.25fr 1fr}
.mock .pane{padding:22px}
.mock .pane.left{border-right:1px solid var(--line)}
.statline{display:flex;gap:22px;flex-wrap:wrap;margin-bottom:18px}
.statline .s b{font-size:26px;font-weight:800;letter-spacing:-.02em;display:block;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.statline .s span{font-size:12px;color:var(--ink-soft)}
.skelrow{height:9px;border-radius:6px;background:linear-gradient(90deg,rgba(255,255,255,.05),rgba(255,255,255,.12),rgba(255,255,255,.05));background-size:200% 100%;animation:shimmer 1.6s infinite;margin:8px 0}
@keyframes shimmer{to{background-position:-200% 0}}
.chat{display:flex;flex-direction:column;gap:9px}
.bub{max-width:88%;padding:10px 13px;border-radius:14px;font-size:13px;line-height:1.45}
.bub.them{align-self:flex-start;background:var(--glass);border:1px solid var(--line)}
.bub.us{align-self:flex-end;background:var(--grad);color:#fff;border-bottom-right-radius:5px}
.bub .lab{font-size:9.5px;text-transform:uppercase;letter-spacing:.06em;opacity:.7;font-weight:700;margin-bottom:2px}

/* Logos / trust strip */
.trustbar{display:flex;align-items:center;justify-content:center;gap:34px;flex-wrap:wrap;opacity:.7;font-weight:600;color:var(--ink-soft);font-size:14px}

/* Stat band */
.stats4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat-c{padding:24px;text-align:center;border-radius:var(--radius)}
.stat-c .n{font-size:clamp(28px,3.6vw,42px);font-weight:800;letter-spacing:-.03em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-c .l{color:var(--ink-soft);font-size:13.5px;margin-top:6px}

/* Feature rows */
.feat{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:8px}
.feat.rev .vis{order:2}
.ico{width:50px;height:50px;border-radius:14px;background:var(--grad-soft);border:1px solid var(--line);color:var(--ink);display:grid;place-items:center;font-size:23px;margin-bottom:18px}
.feat ul{list-style:none;padding:0;margin:18px 0 0}
.feat li{display:flex;gap:10px;align-items:flex-start;margin:10px 0;color:var(--ink-soft)}
.feat li svg{flex:none;margin-top:3px}
.vis{border-radius:var(--radius);padding:24px;min-height:230px}

/* Grids / cards */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{border-radius:var(--radius);padding:26px;transition:transform .28s cubic-bezier(.2,.7,.2,1),border-color .25s,box-shadow .28s}
.card:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:var(--shadow-lg)}
.card .ci{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:21px;margin-bottom:14px;background:var(--grad-soft);border:1px solid var(--line)}
.step .num{width:34px;height:34px;border-radius:11px;background:var(--grad);color:#fff;font-weight:800;display:grid;place-items:center;margin-bottom:12px;box-shadow:var(--glow)}

/* Pricing */
.prices{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.price{border-radius:var(--radius);padding:30px;display:flex;flex-direction:column}
.price.feat-plan{border-color:transparent;position:relative;background:linear-gradient(180deg,rgba(109,139,255,.14),rgba(139,92,246,.06));box-shadow:0 30px 80px -30px rgba(109,139,255,.6)}
.price.feat-plan::after{content:"";position:absolute;inset:0;border-radius:var(--radius);padding:1px;background:var(--grad);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.price .badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:11.5px;font-weight:700;padding:5px 14px;border-radius:999px;box-shadow:var(--glow)}
.price .amt{font-size:44px;font-weight:800;letter-spacing:-.03em;margin:12px 0 2px}
.price .amt small{font-size:15px;font-weight:600;color:var(--ink-soft)}
.price ul{list-style:none;padding:0;margin:18px 0 24px;flex:1}
.price li{display:flex;gap:9px;padding:8px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--ink-soft);align-items:flex-start}
.price li svg{flex:none;margin-top:2px}
.price li:last-child{border-bottom:0}
.seg{display:inline-flex;background:var(--glass);border:1px solid var(--line);border-radius:999px;padding:4px;gap:4px}
.seg button{border:0;background:transparent;color:var(--ink-soft);font-weight:600;font-size:14px;padding:9px 18px;border-radius:999px;cursor:pointer;transition:.2s}
.seg button.on{background:var(--grad);color:#fff;box-shadow:var(--glow)}

/* Case study */
.case-hero{border-radius:var(--radius-lg);padding:42px;display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.metric{border-radius:var(--radius-sm);padding:18px;text-align:center;background:var(--glass);border:1px solid var(--line)}
.metric .v{font-size:28px;font-weight:800;letter-spacing:-.03em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.metric .k{font-size:12px;color:var(--ink-soft);margin-top:4px}
.quote{font-size:clamp(21px,2.7vw,29px);font-weight:600;letter-spacing:-.02em;line-height:1.35}

/* FAQ */
.faq{max-width:780px;margin:0 auto}
.qa{border:1px solid var(--line);border-radius:14px;margin-bottom:12px;background:var(--panel);overflow:hidden;transition:border-color .2s}
.qa:hover{border-color:var(--line-strong)}
.qa button{width:100%;text-align:left;background:transparent;border:0;color:var(--ink);font-size:16.5px;font-weight:600;padding:20px 22px;cursor:pointer;display:flex;justify-content:space-be