/* ChemPrep — marketing + auth shared styles (premium light SaaS) */
:root{
  --bg:#FAF8F4; --surface:#FFFFFF; --surface-2:#F4F1EA; --surface-3:#ECE8DF;
  --ink:#1B1916; --ink-2:#635D54; --ink-3:#9A9384; --ink-on:#FBFAF7;
  --line:#ECE7DD; --line-2:#E0DACE;
  --brass:#A8854A; --brass-deep:#886A36; --brass-soft:#C7AC76; --brass-wash:#F3ECDC;
  --ok:#3C7A57; --err:#A6452F; --err-bg:#F7EBE6;
  --r:10px; --r-card:16px;
  --sh-1:0 1px 2px rgba(27,25,22,.05);
  --sh-2:0 1px 3px rgba(27,25,22,.05),0 14px 36px -12px rgba(27,25,22,.12);
  --sh-pop:0 18px 48px -16px rgba(27,25,22,.22);
  --ease:cubic-bezier(.4,0,.2,1);
  --serif:'Cormorant Garamond',Georgia,serif;
  --sans:'Inter',system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;scroll-behavior:smooth}
body{font-family:var(--sans);font-size:15px;line-height:1.6;color:var(--ink);background:var(--bg)}
a{color:inherit;text-decoration:none}
.tnum{font-variant-numeric:tabular-nums}
.wrap{max-width:1140px;margin:0 auto;padding:0 28px}
.serif{font-family:var(--serif)}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(250,248,244,.82);
  backdrop-filter:saturate(160%) blur(12px);-webkit-backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line)}
.nav::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:var(--brass);opacity:.32}
.nav-in{max-width:1140px;margin:0 auto;height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 28px}
.brand{display:flex;align-items:center;gap:13px}
.monogram{width:36px;height:36px;border-radius:9px;flex-shrink:0;background:var(--ink);
  display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-weight:600;
  font-size:20px;color:var(--brass-soft);box-shadow:inset 0 0 0 1px var(--brass-deep)}
.brand-name{font-family:var(--serif);font-size:22px;font-weight:600;letter-spacing:.01em}
.brand-tag{font-size:11px;color:var(--ink-3);letter-spacing:.05em;margin-top:1px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{font-size:14px;font-weight:500;color:var(--ink-2);transition:color .15s}
.nav-links a:hover{color:var(--ink)}
@media(max-width:680px){.nav-links a.hide-sm{display:none}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;
  border-radius:var(--r);font-family:var(--sans);font-size:14px;font-weight:600;cursor:pointer;
  border:1px solid transparent;transition:all .16s var(--ease);white-space:nowrap}
.btn-primary{background:var(--ink);color:var(--ink-on);box-shadow:var(--sh-1),inset 0 1px 0 rgba(255,255,255,.06)}
.btn-primary:hover{background:#28241F;box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--brass-soft)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px}
.btn-lg{height:50px;padding:0 28px;font-size:15px}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* hero */
.hero{padding:74px 0 40px;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;color:var(--brass-deep);background:var(--brass-wash);
  border:1px solid var(--brass-soft);border-radius:999px;padding:6px 14px;margin-bottom:22px}
.hero h1{font-family:var(--serif);font-size:60px;font-weight:600;line-height:1.06;letter-spacing:.005em;max-width:760px;margin:0 auto}
.hero p.sub{font-size:19px;color:var(--ink-2);max-width:600px;margin:20px auto 30px;line-height:1.6}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero-note{font-size:12.5px;color:var(--ink-3);margin-top:16px}
@media(max-width:680px){.hero h1{font-size:40px}.hero p.sub{font-size:17px}}

/* product preview */
.preview{margin:54px auto 0;max-width:1000px;border-radius:18px;overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-pop);position:relative;background:var(--surface)}
.preview::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--brass);opacity:.9;z-index:2}
.preview img{width:100%;display:block}
.preview-tour{max-width:920px}
.preview-tour iframe{display:block;width:100%;height:620px;border:0;background:var(--bg)}
@media(max-width:680px){.preview-tour iframe{height:500px}}

/* stat strip */
.stats{display:flex;justify-content:center;gap:0;flex-wrap:wrap;margin:64px auto;
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);box-shadow:var(--sh-1);max-width:760px}
.stat{flex:1;min-width:150px;text-align:center;padding:26px 18px}
.stat + .stat{border-left:1px solid var(--line)}
.stat-n{font-family:var(--serif);font-size:34px;font-weight:600;line-height:1}
.stat-l{font-size:12px;color:var(--ink-3);text-transform:uppercase;letter-spacing:.09em;margin-top:8px}

/* sections */
.section{padding:64px 0}
.section-head{text-align:center;max-width:640px;margin:0 auto 44px}
.section-head .k{font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--brass-deep)}
.section-head h2{font-family:var(--serif);font-size:40px;font-weight:600;margin-top:8px;letter-spacing:.01em}
.section-head p{font-size:16px;color:var(--ink-2);margin-top:12px}

/* feature grid */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:880px){.features{grid-template-columns:1fr}}
.feature{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-1)}
.feature .ico{width:42px;height:42px;border-radius:11px;background:var(--surface-2);display:flex;align-items:center;
  justify-content:center;font-size:20px;margin-bottom:16px;border:1px solid var(--line)}
.feature h3{font-size:17px;font-weight:600;margin-bottom:7px}
.feature p{font-size:14px;color:var(--ink-2);line-height:1.6}

/* pricing */
.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
@media(max-width:880px){.pricing{grid-template-columns:1fr}}
.plan{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:30px;box-shadow:var(--sh-1);position:relative}
.plan.feat{border-color:var(--brass);box-shadow:var(--sh-2)}
.plan.feat::before{content:"Most popular";position:absolute;top:-11px;left:50%;transform:translateX(-50%);
  font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-on);
  background:var(--brass-deep);padding:4px 12px;border-radius:999px}
.plan h3{font-family:var(--serif);font-size:24px;font-weight:600}
.plan .blurb{font-size:13px;color:var(--ink-3);margin-top:2px}
.plan .price{margin:18px 0 4px;display:flex;align-items:baseline;gap:4px}
.plan .price .amt{font-size:42px;font-weight:700;letter-spacing:-.01em}
.plan .price .per{font-size:14px;color:var(--ink-2)}
.plan .lim{font-size:13.5px;color:var(--ink-2);min-height:42px;margin-bottom:20px;line-height:1.55}
.plan ul{list-style:none;margin:18px 0 0;border-top:1px solid var(--line);padding-top:18px}
.plan li{font-size:13.5px;color:var(--ink-2);padding:5px 0 5px 24px;position:relative}
.plan li::before{content:"";position:absolute;left:0;top:9px;width:13px;height:8px;border-left:2px solid var(--brass);
  border-bottom:2px solid var(--brass);transform:rotate(-45deg)}

/* forms / auth cards */
.authpage{min-height:calc(100vh - 72px);display:flex;align-items:center;justify-content:center;padding:48px 20px}
.authcard{width:100%;max-width:440px;background:var(--surface);border:1px solid var(--line);
  border-radius:18px;box-shadow:var(--sh-2);overflow:hidden}
.authcard::before{content:"";display:block;height:2px;background:var(--brass);opacity:.9}
.authcard-in{padding:36px 36px 32px}
.authcard h1{font-family:var(--serif);font-size:30px;font-weight:600;letter-spacing:.005em}
.authcard .lead{font-size:14px;color:var(--ink-2);margin-top:6px;margin-bottom:24px}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px}
.field label{font-size:12.5px;font-weight:500;color:var(--ink)}
.field input{height:46px;background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);
  padding:0 14px;font-family:var(--sans);font-size:15px;color:var(--ink);transition:border-color .16s,box-shadow .16s}
.field input:hover{border-color:var(--brass-soft)}
.field input:focus{outline:none;border-color:var(--brass);box-shadow:0 0 0 3px var(--brass-wash)}
.formnote{font-size:13px;color:var(--ink-2);text-align:center;margin-top:18px}
.formnote a{color:var(--brass-deep);font-weight:600}
.err{background:var(--err-bg);border:1px solid #E8CcC0;color:var(--err);font-size:13px;
  border-radius:9px;padding:10px 13px;margin-bottom:16px;display:none}
.err.on{display:block}
.divider{display:flex;align-items:center;gap:12px;color:var(--ink-3);font-size:12px;margin:20px 0}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}

/* plan picker (signup) */
.planpick{display:flex;flex-direction:column;gap:10px;margin-bottom:8px}
.planopt{display:flex;align-items:center;gap:14px;border:1px solid var(--line-2);border-radius:12px;
  padding:14px 16px;cursor:pointer;transition:all .15s}
.planopt:hover{border-color:var(--brass-soft)}
.planopt.sel{border-color:var(--brass);background:var(--brass-wash)}
.planopt .radio{width:18px;height:18px;border-radius:50%;border:2px solid var(--line-2);flex-shrink:0;position:relative}
.planopt.sel .radio{border-color:var(--brass)}
.planopt.sel .radio::after{content:"";position:absolute;inset:3px;border-radius:50%;background:var(--brass)}
.planopt .pn{font-size:14.5px;font-weight:600}
.planopt .pd{font-size:12px;color:var(--ink-3)}
.planopt .pp{margin-left:auto;text-align:right;font-weight:700}
.planopt .pp small{font-weight:400;color:var(--ink-3);font-size:11px}

/* mock card form */
.testbadge{font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--brass-deep);
  background:var(--brass-wash);border:1px solid var(--brass-soft);border-radius:999px;padding:4px 11px;display:inline-block;margin-bottom:16px}

/* footer */
.footer{border-top:1px solid var(--line);margin-top:40px;padding:46px 0 40px}
.footer-in{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.footer .brand-name{font-size:20px}
.footer-cols{display:flex;gap:54px;flex-wrap:wrap}
.footer-col h4{font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-bottom:12px}
.footer-col a{display:block;font-size:14px;color:var(--ink-2);padding:4px 0}
.footer-col a:hover{color:var(--ink)}
.footer-base{margin-top:34px;padding-top:22px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-3);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* prose (about) */
.prose{max-width:680px;margin:0 auto}
.prose h1{font-family:var(--serif);font-size:48px;font-weight:600;line-height:1.1;margin-bottom:8px}
.prose .lead{font-size:19px;color:var(--ink-2);margin-bottom:32px}
.prose h2{font-family:var(--serif);font-size:28px;font-weight:600;margin:34px 0 12px}
.prose p{font-size:16px;color:var(--ink-2);margin-bottom:16px;line-height:1.7}
.prose strong{color:var(--ink);font-weight:600}