/* ============================================
   PEPSYNTH LABS — Peptide Calculator
   Mobile-first. Dark lab aesthetic, electric blue.
   ============================================ */

:root{
  --navy:#0A1628;
  --navy-2:#0F1F38;
  --panel:#132844;
  --panel-2:#18314F;
  --line:rgba(90,160,255,.16);
  --blue:#2E9BFF;
  --blue-dk:#1668C8;
  --cyan:#5FD8FF;
  --txt:#EAF2FF;
  --muted:#94AECC;
  --warn:#FFB547;
  --danger:#FF6B6B;
  --r:14px;
  --pad:16px;
  --font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);background:var(--navy);color:var(--txt);
  font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  background-image:
    radial-gradient(900px 500px at 100% -10%,rgba(46,155,255,.18),transparent 60%),
    radial-gradient(700px 400px at -10% 20%,rgba(95,216,255,.10),transparent 60%);
  background-attachment:fixed;
}
img{max-width:100%;display:block}
input,select,button,textarea{font:inherit;color:inherit}

.wrap{width:100%;max-width:760px;margin:0 auto;padding:0 var(--pad)}

/* ---------- LOGO ---------- */
.logo{
  display:inline-flex;align-items:center;
  text-decoration:none;line-height:0;
}
.logo .wordmark{height:30px;width:auto;flex:none}

/* Age gate — atom emblem stacked above the wordmark */
.logo-lg{
  display:flex;flex-direction:column;align-items:center;gap:14px;margin-bottom:20px;
}
.logo-lg .atom{
  height:64px;width:auto;
  filter:drop-shadow(0 0 18px rgba(46,155,255,.5));
}
.logo-lg .wordmark{height:26px}

/* Footer */
.logo-foot .wordmark{height:24px}

/* ---------- DECORATIVE ATOM ----------
   Ambient brand embellishment. Purely visual, never interactive. */
.atom-deco{
  position:absolute;pointer-events:none;user-select:none;
  width:auto;z-index:0;
}
.hero{position:relative;overflow:hidden}
.hero-atom{
  height:230px;top:-34px;right:-72px;opacity:.10;
  filter:blur(.3px);
  animation:spin 90s linear infinite;
}
.results{position:relative;overflow:hidden}
.results-atom{
  height:150px;bottom:-42px;right:-38px;opacity:.07;
}
.site-foot{position:relative;overflow:hidden}
.foot-atom{
  height:180px;top:-46px;left:-56px;opacity:.06;
  animation:spin 120s linear infinite reverse;
}
/* keep content above the watermarks */
.hero .wrap,.results>*:not(.atom-deco),.site-foot .wrap{position:relative;z-index:1}

@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}

/* ---------- AGE GATE ---------- */
.gate{
  position:fixed;inset:0;z-index:200;display:grid;place-items:center;
  background:rgba(5,12,24,.96);backdrop-filter:blur(10px);padding:20px;
  overflow-y:auto;
}
.gate[hidden]{display:none}
.gate-card{
  width:100%;max-width:440px;background:var(--navy-2);border:1px solid var(--line);
  border-radius:18px;padding:26px 22px;text-align:center;
  box-shadow:0 24px 70px rgba(0,0,0,.6);
}
.gate-card h2{font-size:17px;margin:0 0 12px;letter-spacing:.02em}
.gate-card p{font-size:13.5px;color:var(--muted);margin:0 0 14px}
.gate-exit{display:block;margin-top:14px;color:var(--muted);font-size:13px;text-decoration:none}

/* ---------- HEADER ---------- */
.site-head{
  position:sticky;top:0;z-index:100;
  background:rgba(10,22,40,.88);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  padding-top:env(safe-area-inset-top);
}
.head-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.head-cta{
  background:var(--blue);color:#04101F;font-weight:700;font-size:13px;
  padding:8px 16px;border-radius:99px;text-decoration:none;
  box-shadow:0 4px 16px rgba(46,155,255,.35);
}
.ticker{
  overflow:hidden;white-space:nowrap;background:var(--blue-dk);
  font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:#DCEEFF;
}
.ticker span{display:inline-block;padding:5px 0;animation:slide 30s linear infinite}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- HERO ---------- */
.hero{padding:34px 0 22px}
.eyebrow{
  display:inline-block;font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);border:1px solid var(--line);border-radius:99px;padding:4px 12px;margin-bottom:14px;
}
.hero h1{font-size:clamp(28px,8.5vw,42px);line-height:1.1;margin:0 0 12px;font-weight:800;letter-spacing:-.02em}
.hero h1 b{
  background:linear-gradient(100deg,var(--cyan),var(--blue));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p{color:var(--muted);font-size:15px;margin:0;max-width:56ch}

/* ---------- CARDS ---------- */
.card{
  background:linear-gradient(180deg,var(--navy-2),rgba(15,31,56,.6));
  border:1px solid var(--line);border-radius:var(--r);
  padding:20px 16px;margin:0 0 16px;
}
.card-title{
  font-size:17px;margin:0 0 14px;font-weight:700;letter-spacing:-.01em;
  display:flex;align-items:center;gap:9px;
}
.card-title::before{content:"";width:3px;height:17px;border-radius:2px;background:var(--blue);flex:none}

/* ---------- FORM ---------- */
.field{display:block;margin-bottom:14px}
.field>span{
  display:block;font-size:12px;text-transform:uppercase;letter-spacing:.09em;
  color:var(--muted);margin-bottom:7px;font-weight:600;
}
.field>span small{text-transform:none;letter-spacing:0;font-weight:400;opacity:.75}
input[type=number],input[type=search],select{
  width:100%;background:var(--panel);border:1px solid var(--line);
  border-radius:11px;padding:13px 14px;font-size:16px;font-weight:600;
  outline:none;transition:border-color .15s,box-shadow .15s;appearance:none;
}
select{
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'><path fill='none' stroke='%2394AECC' stroke-width='1.6' d='M1 1.5l5 5 5-5'/></svg>");
  background-repeat:no-repeat;background-position:right 14px center;background-size:11px;
  padding-right:38px;
}
input:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(46,155,255,.18)}
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;appearance:none;margin:0}
input[type=number]{-moz-appearance:textfield;appearance:textfield}

.input-suffix{position:relative;display:flex;align-items:center}
.input-suffix input{padding-right:64px}
.input-suffix b{
  position:absolute;right:14px;font-size:13px;color:var(--muted);
  font-weight:600;pointer-events:none;
}
.unit-sel{
  position:absolute;right:5px;width:auto;min-width:80px;padding:8px 30px 8px 10px;
  font-size:13px;background-color:var(--panel-2);border-radius:8px;
  background-position:right 9px center;
}
.custom-vial{margin-top:8px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:start}

.btn{
  border:0;border-radius:11px;padding:14px 18px;font-weight:700;font-size:15px;
  cursor:pointer;width:100%;transition:transform .1s,filter .15s;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:linear-gradient(100deg,var(--blue),var(--blue-dk));color:#fff;box-shadow:0 6px 20px rgba(46,155,255,.35)}
.btn-ghost{background:var(--panel);border:1px solid var(--line);color:var(--txt);font-size:14px;padding:11px 14px}

/* ---------- RESULTS ---------- */
.results{
  margin-top:18px;border-radius:var(--r);padding:18px 14px;
  background:linear-gradient(160deg,rgba(46,155,255,.16),rgba(46,155,255,.04));
  border:1px solid rgba(46,155,255,.32);
}
.res-hero{text-align:center;margin-bottom:6px}
.res-label{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan)}
.res-units{display:flex;align-items:baseline;justify-content:center;gap:7px;margin:2px 0}
.res-units b{
  font-size:clamp(46px,15vw,66px);line-height:1;font-weight:800;letter-spacing:-.03em;
  background:linear-gradient(100deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;
}
.res-units span{font-size:15px;color:var(--muted);font-weight:600}
.res-ml{font-size:14px;color:var(--muted);font-weight:600}

/* syringe visual */
.syringe{display:flex;align-items:center;margin:16px 0 14px;height:34px}
.plunger{width:12px;height:20px;background:var(--muted);border-radius:0 3px 3px 0;flex:none}
.barrel{
  position:relative;flex:1;height:28px;background:rgba(255,255,255,.06);
  border:1px solid var(--line);border-radius:6px 0 0 6px;overflow:hidden;order:-1;
}
.fill{
  position:absolute;inset:0 auto 0 0;width:25%;
  background:linear-gradient(90deg,rgba(95,216,255,.85),rgba(46,155,255,.85));
  transition:width .25s ease;
}
.ticks{position:absolute;inset:0;display:flex}
.ticks i{flex:1;border-right:1px solid rgba(255,255,255,.14)}
.ticks i.major{border-right-color:rgba(255,255,255,.4)}
.needle{width:34px;height:2px;background:linear-gradient(90deg,var(--muted),transparent);flex:none}

.res-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:4px}
.res-grid>div{
  background:rgba(5,14,28,.4);border:1px solid var(--line);
  border-radius:10px;padding:10px 11px;
}
.res-grid span{display:block;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.res-grid b{font-size:16px;font-weight:700}

.warn{
  margin:12px 0 0;padding:10px 12px;border-radius:10px;font-size:13px;
  background:rgba(255,181,71,.12);border:1px solid rgba(255,181,71,.35);color:var(--warn);
}
.warn.danger{background:rgba(255,107,107,.12);border-color:rgba(255,107,107,.4);color:var(--danger)}
.res-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:12px}
.fineprint{font-size:11.5px;color:var(--muted);margin:12px 0 0;opacity:.8}

/* ---------- REFERENCE CARD ---------- */
.tag{
  display:inline-block;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;
  background:rgba(46,155,255,.16);border:1px solid var(--line);color:var(--cyan);
  padding:3px 10px;border-radius:99px;margin-bottom:14px;
}
.spec{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-bottom:16px}
.spec>div{background:var(--panel);border-radius:10px;padding:9px 11px}
.spec span{display:block;font-size:10.5px;text-transform:uppercase;letter-spacing:.09em;color:var(--muted)}
.spec b{font-size:13.5px;font-weight:600;line-height:1.35}
.ref-block{border-top:1px solid var(--line);padding-top:13px;margin-top:13px}
.ref-block h3{font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:var(--cyan);margin:0 0 6px}
.ref-block p{margin:0;font-size:14.5px;color:#CFE0F5}

/* ---------- STEPS / TABLE / CALLOUT ---------- */
.steps{margin:0;padding-left:0;list-style:none;counter-reset:s}
.steps li{
  counter-increment:s;position:relative;padding:0 0 15px 40px;font-size:14.5px;color:#CFE0F5;
}
.steps li::before{
  content:counter(s);position:absolute;left:0;top:0;
  width:27px;height:27px;border-radius:8px;display:grid;place-items:center;
  background:rgba(46,155,255,.16);border:1px solid var(--line);
  color:var(--cyan);font-size:12.5px;font-weight:800;
}
.steps li b{color:#fff}

.tbl-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:440px}
th,td{text-align:left;padding:10px 11px;border-bottom:1px solid var(--line)}
th{font-size:11px;text-transform:uppercase;letter-spacing:.09em;color:var(--cyan);font-weight:700}
td{color:#CFE0F5}
tbody tr:nth-child(odd){background:rgba(255,255,255,.025)}

.callout{
  margin-top:14px;background:rgba(46,155,255,.08);border-left:3px solid var(--blue);
  border-radius:0 10px 10px 0;padding:12px 14px;font-size:13.5px;color:#CFE0F5;line-height:1.6;
}

/* ---------- LIBRARY ---------- */
.search{margin-bottom:11px}
.chips{
  display:flex;gap:7px;overflow-x:auto;padding:0 16px 10px;margin:0 -16px 12px;
  -webkit-overflow-scrolling:touch;scrollbar-width:none;
}
.chips::-webkit-scrollbar{display:none}
.chip{
  flex:none;background:var(--panel);border:1px solid var(--line);color:var(--muted);
  border-radius:99px;padding:7px 14px;font-size:12.5px;font-weight:600;cursor:pointer;white-space:nowrap;
}
.chip.on{background:var(--blue);border-color:var(--blue);color:#04101F}

.lib-list details{
  border:1px solid var(--line);border-radius:12px;margin-bottom:9px;background:var(--panel);overflow:hidden;
}
.lib-list summary{
  list-style:none;cursor:pointer;padding:13px 14px;display:flex;
  align-items:center;justify-content:space-between;gap:10px;font-weight:700;font-size:15px;
}
.lib-list summary::-webkit-details-marker{display:none}
.lib-list summary::after{content:"+";color:var(--blue);font-size:20px;font-weight:400;line-height:1;flex:none}
.lib-list details[open] summary::after{content:"–"}
.lib-list summary em{font-style:normal;font-size:11px;color:var(--muted);font-weight:500;letter-spacing:.06em;text-transform:uppercase;margin-left:auto;padding-right:10px;white-space:nowrap}
.lib-body{padding:13px 14px 14px;border-top:1px solid var(--line)}
.lib-body .kv{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:12px}
.lib-body .kv>div{background:rgba(5,14,28,.35);border-radius:9px;padding:8px 10px}
.lib-body .kv span{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.09em;color:var(--muted)}
.lib-body .kv b{font-size:13px;font-weight:600}
.lib-body h4{font-size:11.5px;text-transform:uppercase;letter-spacing:.11em;color:var(--cyan);margin:12px 0 4px}
.lib-body p{margin:0;font-size:14px;color:#CFE0F5}
.use-btn{
  margin-top:14px;width:100%;background:rgba(46,155,255,.14);border:1px solid var(--line);
  color:var(--cyan);border-radius:10px;padding:11px;font-weight:700;font-size:13.5px;cursor:pointer;
}
.empty{text-align:center;color:var(--muted);padding:26px 0;font-size:14px}

/* ---------- CONVERSIONS ---------- */
.conv{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.conv>div{background:var(--panel);border-radius:10px;padding:11px;text-align:center}
.conv b{display:block;font-size:16px;color:var(--cyan)}
.conv span{font-size:12.5px;color:var(--muted)}

/* ---------- FAQ ---------- */
.card>details{border-bottom:1px solid var(--line);padding-bottom:9px;margin-bottom:9px}
.card>details summary{
  list-style:none;cursor:pointer;font-weight:600;font-size:15px;padding:8px 24px 8px 0;position:relative;
}
.card>details summary::-webkit-details-marker{display:none}
.card>details summary::after{content:"+";position:absolute;right:2px;top:6px;color:var(--blue);font-size:19px}
.card>details[open] summary::after{content:"–"}
.card>details p{margin:2px 0 8px;font-size:14px;color:#CFE0F5}

/* ---------- DISCLAIMER / FOOTER ---------- */
.disclaimer{background:rgba(255,107,107,.05);border-color:rgba(255,107,107,.22)}
.disclaimer .card-title::before{background:var(--danger)}
.disclaimer p{font-size:12.5px;color:var(--muted);margin:0 0 10px;line-height:1.65}

.site-foot{
  border-top:1px solid var(--line);padding:28px 0 100px;margin-top:10px;
  background:rgba(5,12,24,.5);text-align:center;
}
.site-foot nav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 18px;margin:16px 0}
.site-foot nav a{color:var(--muted);text-decoration:none;font-size:13.5px}
.site-foot .contact{font-size:13.5px;margin:0 0 14px}
.site-foot .contact a{color:var(--cyan);text-decoration:none}
.site-foot .small{font-size:11.5px;color:var(--muted);opacity:.75;margin:0 auto 6px;max-width:52ch}

/* ---------- FAB ---------- */
.fab{
  position:fixed;left:50%;transform:translateX(-50%);
  bottom:calc(16px + env(safe-area-inset-bottom));z-index:90;
  background:linear-gradient(100deg,var(--blue),var(--blue-dk));color:#fff;
  padding:13px 26px;border-radius:99px;font-weight:700;font-size:14px;text-decoration:none;
  box-shadow:0 10px 30px rgba(0,0,0,.5),0 0 0 1px rgba(255,255,255,.1) inset;
  opacity:0;pointer-events:none;transition:opacity .25s;
}
.fab.show{opacity:1;pointer-events:auto}

/* ---------- TABLET / DESKTOP ---------- */
@media (min-width:640px){
  :root{--pad:24px}
  .card{padding:26px 24px}
  .res-grid,.spec,.conv{grid-template-columns:repeat(4,1fr)}
  .lib-body .kv{grid-template-columns:repeat(4,1fr)}
  .hero{padding:52px 0 30px}
  table{min-width:0}
}
@media (min-width:900px){
  .wrap{max-width:880px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto}
}