:root{
  --porcelain:#F4F1F3;
  --porcelain-2:#EAE3E8;
  --ink:#211B1E;
  --bio:#435E50;
  --bio-light:#6C8577;
  --berry:#8C3556;
  --berry-deep:#6E2843;
  --gold:#B08D57;
  --graphite:#6B646A;
  --line:#DCD3D9;

  --display:"Fraunces", serif;
  --body:"Work Sans", -apple-system, sans-serif;
  --mono:"JetBrains Mono", monospace;
  --maxw:1160px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:var(--body);color:var(--ink);background:var(--porcelain);-webkit-font-smoothing:antialiased;}
img,svg{display:block;max-width:100%;}
a{color:inherit;}
p{margin:0;line-height:1.6;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
h1,h2,h3{font-family:var(--display);font-weight:600;margin:0;letter-spacing:-.01em;}
.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.13em;text-transform:uppercase;
  color:var(--bio);display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--gold);}
:focus-visible{outline:2px solid var(--berry);outline-offset:3px;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
}

/* ---- NAV ---- */
header{position:sticky;top:0;z-index:40;background:rgba(244,241,243,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);}
nav.wrap{display:flex;align-items:center;justify-content:space-between;height:74px;}
.logo{font-family:var(--display);font-style:italic;font-weight:500;font-size:22px;display:flex;align-items:center;gap:8px;}
.logo .mark{width:8px;height:8px;border-radius:50%;background:var(--berry);}
.navlinks{display:none;list-style:none;margin:0;padding:0;gap:32px;}
@media(min-width:860px){.navlinks{display:flex;}}
.navlinks a{font-size:14px;font-weight:500;text-decoration:none;color:var(--ink);border-bottom:1px solid transparent;padding-bottom:4px;}
.navlinks a:hover{border-color:var(--gold);}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--body);font-weight:600;font-size:14.5px;
  padding:13px 22px;border-radius:2px;text-decoration:none;cursor:pointer;border:1px solid transparent;transition:transform .15s ease, background .15s ease;}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--berry);color:#fff;}
.btn-primary:hover{background:var(--berry-deep);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--porcelain);}
.navcta{display:none;}
@media(min-width:860px){.navcta{display:inline-flex;}}

/* ---- HERO ---- */
.hero{padding:74px 0 56px;}
.hero-grid{display:grid;grid-template-columns:1fr;gap:52px;align-items:center;}
@media(min-width:920px){.hero-grid{grid-template-columns:1.05fr .95fr;}}
.hero h1{font-size:clamp(36px,5.4vw,58px);line-height:1.03;margin:18px 0 22px;}
.hero h1 em{font-style:italic;color:var(--berry);font-weight:500;}
.hero p.lede{font-size:17.5px;color:var(--graphite);max-width:48ch;margin-bottom:30px;}
.hero-ctas{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-note{font-family:var(--mono);font-size:12px;color:var(--graphite);display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.hero-note .sep{color:var(--line);}

/* skin diagram */
.diagram-card{background:#fff;border:1px solid var(--line);border-radius:4px;padding:22px;}
.diagram-card .cap{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--graphite);display:flex;justify-content:space-between;margin-bottom:10px;}
.band-epidermis{fill:#F7EEF1;}
.band-dermis{fill:#F1E4E9;}
.band-hypodermis{fill:#EAD9D0;}
.fiber{stroke:var(--bio-light);stroke-width:1.3;fill:none;opacity:.8;}
.fatcell{fill:none;stroke:var(--gold);stroke-width:1.1;opacity:.55;}
.leader{stroke:var(--line);stroke-width:1;}
.diagram-label{font-family:var(--mono);font-size:10.5px;fill:var(--graphite);}
.diagram-label.hd{fill:var(--ink);font-weight:500;}
.droplet{fill:var(--berry);opacity:.85;}
.droplet-group .d1{animation:drip 3.2s ease-in-out infinite;}
.droplet-group .d2{animation:drip 3.2s ease-in-out .8s infinite;}
.droplet-group .d3{animation:drip 3.2s ease-in-out 1.6s infinite;}
@keyframes drip{
  0%{transform:translateY(0);opacity:0;}
  12%{opacity:.9;}
  70%{transform:translateY(70px);opacity:.35;}
  100%{transform:translateY(78px);opacity:0;}
}

/* ---- TRUST STRIP ---- */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0;}
.trust .wrap{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 26px;}
@media(min-width:760px){.trust .wrap{grid-template-columns:repeat(4,1fr);}}
.trust-item{font-family:var(--mono);font-size:12.5px;color:var(--ink);display:flex;align-items:center;gap:9px;}
.trust-item svg{flex-shrink:0;}

/* ---- SECTIONS ---- */
section{padding:86px 0;}
.sec-head{max-width:640px;margin-bottom:50px;}
.sec-head h2{font-size:clamp(28px,3.8vw,40px);margin:16px 0 14px;line-height:1.05;}
.sec-head p{color:var(--graphite);font-size:16.5px;}

/* ---- HOW TO USE ---- */
.steps{display:grid;grid-template-columns:1fr;gap:2px;background:var(--line);border:1px solid var(--line);}
@media(min-width:760px){.steps{grid-template-columns:repeat(3,1fr);}}
.step{background:var(--porcelain);padding:32px 28px;}
.step .tag{font-family:var(--mono);font-size:12.5px;color:var(--berry);letter-spacing:.08em;}
.step h3{font-size:22px;font-weight:500;margin:14px 0 10px;}
.step p{color:var(--graphite);font-size:15px;}

/* ---- TIMELINE ---- */
.timeline{border-top:1px solid var(--line);}
.tl-row{display:grid;grid-template-columns:1fr;gap:6px;padding:26px 0;border-bottom:1px solid var(--line);}
@media(min-width:700px){.tl-row{grid-template-columns:140px 1fr;gap:26px;align-items:baseline;}}
.tl-when{font-family:var(--mono);font-size:13px;color:var(--berry);text-transform:uppercase;letter-spacing:.06em;}
.tl-what h3{font-size:19px;font-weight:500;margin-bottom:6px;}
.tl-what p{color:var(--graphite);font-size:15px;max-width:62ch;}

/* ---- FORMULA ---- */
.formula-section{background:var(--porcelain-2);}
.formula-grid{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);border:1px solid var(--line);}
@media(min-width:640px){.formula-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:980px){.formula-grid{grid-template-columns:repeat(3,1fr);}}
.formula-card{background:#fff;padding:26px 26px;}
.formula-card .name-row{display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:8px;}
.formula-card .name{font-family:var(--display);font-weight:600;font-size:18px;}
.formula-card .pct{font-family:var(--mono);font-size:13px;color:var(--berry);}
.formula-card .inci{font-family:var(--mono);font-size:11px;color:var(--graphite);margin-bottom:10px;display:block;}
.formula-card p{font-size:14.5px;color:var(--graphite);}
.formula-note{margin-top:22px;font-family:var(--mono);font-size:12px;color:var(--graphite);max-width:70ch;}

/* ---- FEEDBACK ---- */
.testers{display:grid;grid-template-columns:1fr;gap:22px;}
@media(min-width:820px){.testers{grid-template-columns:repeat(3,1fr);}}
.tester{background:#fff;border:1px solid var(--line);padding:26px 24px;display:flex;flex-direction:column;gap:16px;}
.tester blockquote{margin:0;font-size:15px;line-height:1.6;color:var(--ink);}
.tester footer{font-family:var(--mono);font-size:11.5px;color:var(--graphite);display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:12px;}

/* ---- FAQ ---- */
.faq-list{border-top:1px solid var(--line);max-width:760px;}
.faq-list details{border-bottom:1px solid var(--line);}
.faq-list summary{padding:22px 4px;font-family:var(--display);font-weight:600;font-size:18px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:20px;}
.faq-list summary::-webkit-details-marker{display:none;}
.faq-list summary::after{content:"+";font-family:var(--mono);font-size:20px;color:var(--berry);flex-shrink:0;transition:transform .2s ease;}
.faq-list details[open] summary::after{transform:rotate(45deg);}
.faq-list .a{padding:0 4px 22px;color:var(--graphite);font-size:15px;max-width:62ch;}

/* ---- SIGNUP ---- */
.signup{background:var(--porcelain-2);border:1px solid var(--line);padding:52px 40px;display:grid;gap:26px;}
@media(min-width:860px){.signup{grid-template-columns:1fr auto;align-items:center;padding:54px 54px;}}
.signup h2{font-size:clamp(24px,3.2vw,34px);margin:14px 0 10px;}
.signup p{color:var(--graphite);max-width:44ch;}
.signup-form{display:flex;gap:10px;flex-wrap:wrap;}
.signup-form input[type=email]{font-family:var(--body);font-size:15px;padding:14px 16px;border:1px solid var(--ink);background:#fff;min-width:230px;flex:1;}
.signup-form input[type=email]:focus{outline:2px solid var(--berry);outline-offset:1px;}
.signup-msg{font-family:var(--mono);font-size:12px;color:var(--bio);margin-top:10px;min-height:1em;}

/* ---- FOOTER ---- */
footer.site{border-top:1px solid var(--line);background:var(--ink);color:#B9B2B6;padding:52px 0 30px;}
.foot-grid{display:grid;grid-template-columns:1fr;gap:32px;margin-bottom:32px;}
@media(min-width:760px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr;}}
.foot-grid .logo{color:var(--porcelain);}
.foot-grid p{font-size:14px;max-width:38ch;margin-top:14px;}
.foot-col h4{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:#8A8286;margin-bottom:14px;}
.foot-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.foot-col a{font-size:14px;text-decoration:none;color:#CBC4C8;}
.foot-col a:hover{color:var(--gold);}
.foot-legal{border-top:1px solid #3A3336;padding-top:22px;font-family:var(--mono);font-size:11.5px;color:#8A8286;line-height:1.7;}
.foot-bottom{margin-top:18px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-family:var(--mono);font-size:11.5px;color:#8A8286;}