/* AiBillClub — billing support.
   One hue (slate-teal), airy, institutional-calm. House style: tonal blob
   background, white pill nav, rounded cards with soft shadows, dark pill
   CTAs, letterspaced uppercase section headings, dark contrast band. */

:root{
  --ink:#1c2b33;        /* deep slate */
  --body:#3d5059;
  --mist:#f2f6f7;       /* page base */
  --tone1:#dce9ec;      /* blob tone light */
  --tone2:#c3d9de;      /* blob tone deep */
  --teal:#2e6e7e;       /* accent */
  --card:#ffffff;
  --line:#dbe6e9;
  --shadow:0 10px 30px rgba(28,43,51,.08);
  --r-lg:26px; --r-md:18px; --r-pill:999px;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;color:var(--body);background:var(--mist);
  font:500 16.5px/1.65 Manrope,system-ui,sans-serif;
  background-image:
    radial-gradient(58% 42% at 82% -6%, var(--tone2) 0%, transparent 62%),
    radial-gradient(48% 38% at -8% 22%, var(--tone1) 0%, transparent 60%),
    radial-gradient(70% 45% at 55% 108%, var(--tone1) 0%, transparent 55%);
  background-attachment:fixed;
}
h1,h2,h3{color:var(--ink);line-height:1.2;margin:0 0 .5em}
h1{font-size:clamp(1.8rem,4.4vw,2.6rem);font-weight:800;letter-spacing:-.01em}
h2{font-size:1.02rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
h3{font-size:1.1rem;font-weight:700}
p{margin:.35em 0 1em}
a{color:var(--teal)}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 12px 0;z-index:50}
.skip:focus{left:0}
:focus-visible{outline:3px solid var(--teal);outline-offset:2px;border-radius:6px}

/* nav */
.nav-wrap{position:sticky;top:14px;z-index:20;padding:0 16px}
.nav{max-width:880px;margin:0 auto;background:var(--card);border-radius:var(--r-pill);
  box-shadow:var(--shadow);display:flex;align-items:center;justify-content:space-between;
  padding:12px 12px 12px 24px}
.brand{font-weight:800;color:var(--ink);text-decoration:none;font-size:1.05rem}
.brand span{font-weight:500;color:var(--body);font-size:.92rem}
.nav-phone{background:var(--ink);color:#fff;text-decoration:none;font-weight:700;
  border-radius:var(--r-pill);padding:10px 20px;white-space:nowrap}
.nav-phone:hover{background:var(--teal)}

/* layout */
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
section{padding:54px 0}
.hero{padding:72px 0 40px;text-align:center}
.hero .lede{max-width:600px;margin:0 auto 26px;font-size:1.06rem}

/* the statement line — the thing the visitor is staring at */
.statement{max-width:560px;margin:0 auto 30px;background:var(--card);border-radius:var(--r-md);
  box-shadow:var(--shadow);padding:18px 22px;text-align:left}
.statement .st-head{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--body);margin:0 0 10px}
.statement .st-row{display:flex;justify-content:space-between;gap:14px;font-family:var(--mono);
  font-size:.95rem;color:var(--ink);border-top:1px dashed var(--line);padding-top:12px;flex-wrap:wrap}

/* buttons */
.btn{display:inline-block;text-decoration:none;font-weight:700;border-radius:var(--r-pill);
  padding:14px 28px;border:2px solid var(--ink)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--teal);border-color:var(--teal)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--card)}
.btn-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--card);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:26px}
.card p{font-size:.97rem}
.card .go{font-weight:700;text-decoration:none}
@media(max-width:760px){.cards{grid-template-columns:1fr}}

/* dark band */
.band{background:var(--ink);border-radius:var(--r-lg);color:#dfe9ec;padding:40px 34px;margin:20px 0}
.band h2{color:#fff}
.band a{color:#a8d3dd}
.band .big{font-size:clamp(1.3rem,3vw,1.7rem);font-weight:800;color:#fff;text-decoration:none}
.band p{max-width:62ch}

/* faq */
.faq details{background:var(--card);border-radius:var(--r-md);box-shadow:var(--shadow);
  margin:0 0 12px;padding:4px 22px}
.faq summary{cursor:pointer;font-weight:700;color:var(--ink);padding:14px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;font-weight:800;color:var(--teal)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin-top:0}

/* forms */
form.panel{background:var(--card);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:30px;max-width:640px}
label{display:block;font-weight:700;color:var(--ink);margin:16px 0 6px;font-size:.95rem}
input,select,textarea{width:100%;font:inherit;color:var(--ink);background:var(--mist);
  border:1px solid var(--line);border-radius:12px;padding:12px 14px}
textarea{min-height:130px;resize:vertical}
.hint{font-size:.85rem;margin:6px 0 0;color:var(--body)}
.hp{position:absolute;left:-5000px;top:-5000px}
.notice{background:var(--card);border-left:4px solid var(--teal);border-radius:var(--r-md);
  box-shadow:var(--shadow);padding:18px 22px;max-width:640px}

/* legal pages */
.legal{max-width:760px;margin:0 auto;padding:40px 20px 70px}
.legal h1{margin-top:24px}

/* footer */
.foot{padding:20px 16px 40px}
.foot-in{max-width:880px;margin:0 auto;background:var(--card);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:28px 30px;font-size:.92rem}
.foot p{margin:.3em 0}
.foot-legal{color:var(--body)}