/* ============================================================
   PEPTIQ — Precision peptide dosing
   Design system + components
   ============================================================ */

:root{
  /* surfaces */
  --bg:#070b14;
  --bg-2:#0a1020;
  --surface:rgba(255,255,255,.03);
  --surface-2:rgba(255,255,255,.05);
  --surface-3:rgba(255,255,255,.08);
  --border:rgba(255,255,255,.09);
  --border-2:rgba(255,255,255,.14);

  /* text */
  --text:#eaf0fb;
  --muted:#97a6c2;
  --muted-2:#6b7a98;

  /* brand */
  --teal:#2dd4bf;
  --indigo:#6366f1;
  --violet:#8b5cf6;
  --primary:#2dd4bf;
  --accent:#8b5cf6;
  --grad:linear-gradient(135deg,#2dd4bf 0%,#6366f1 55%,#8b5cf6 100%);
  --grad-soft:linear-gradient(135deg,rgba(45,212,191,.18),rgba(139,92,246,.18));

  /* category accents */
  --c-healing:#2dd4bf;
  --c-growth:#38bdf8;
  --c-metabolic:#f59e0b;
  --c-cognitive:#a78bfa;
  --c-longevity:#34d399;
  --c-sexual:#f472b6;
  --c-immune:#60a5fa;
  --c-cosmetic:#f9a8d4;
  --c-muscle:#fb7185;
  --c-sleep:#818cf8;

  /* shape */
  --radius:18px;
  --radius-sm:12px;
  --radius-lg:26px;
  --shadow:0 24px 60px -18px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(45,212,191,.25),0 18px 50px -12px rgba(99,102,241,.45);
  --maxw:1180px;
  --ease:cubic-bezier(.16,1,.3,1);

  --font-head:'Space Grotesk','Segoe UI',system-ui,-apple-system,sans-serif;
  --font-body:'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  font-family:var(--font-body);
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* ambient background glows */
body::before{
  content:"";
  position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(900px 600px at 12% -8%,rgba(45,212,191,.16),transparent 60%),
    radial-gradient(900px 700px at 92% 4%,rgba(139,92,246,.16),transparent 60%),
    radial-gradient(700px 700px at 50% 110%,rgba(99,102,241,.12),transparent 60%);
  pointer-events:none;
}
body::after{
  content:"";
  position:fixed;inset:0;z-index:-2;opacity:.5;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(circle at 50% 30%,#000,transparent 75%);
}

a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font-family:inherit}

h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.08;letter-spacing:-.02em;margin:0}
p{margin:0}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-head);font-size:.74rem;font-weight:600;letter-spacing:.18em;
  text-transform:uppercase;color:var(--teal);
  padding:7px 14px;border:1px solid var(--border-2);border-radius:999px;
  background:var(--surface);
}
.eyebrow svg{width:14px;height:14px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.muted{color:var(--muted)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:var(--font-head);font-weight:600;font-size:.96rem;
  padding:13px 22px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s,border-color .25s;
  white-space:nowrap;
}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--grad);color:#05131a;box-shadow:0 12px 30px -10px rgba(45,212,191,.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 44px -10px rgba(99,102,241,.7)}
.btn-ghost{background:var(--surface-2);color:var(--text);border-color:var(--border-2)}
.btn-ghost:hover{background:var(--surface-3);transform:translateY(-2px);border-color:var(--teal)}
.btn-sm{padding:9px 16px;font-size:.86rem}
.btn-block{width:100%}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:60;
  backdrop-filter:blur(16px);
  background:rgba(7,11,20,.7);
  border-bottom:1px solid transparent;
  transition:border-color .3s,background .3s;
}
.nav.scrolled{border-bottom-color:var(--border);background:rgba(7,11,20,.86)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-head);font-weight:700;font-size:1.28rem;letter-spacing:-.02em}
.brand .mark{width:34px;height:34px;flex:none;filter:drop-shadow(0 4px 12px rgba(99,102,241,.45))}
.brand .word{background:linear-gradient(90deg,#eaf0fb,#b9c4dd);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;padding:9px 14px;border-radius:10px;color:var(--muted);
  font-size:.92rem;font-weight:500;transition:color .2s,background .2s;
}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--surface-2)}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:9px;cursor:pointer}
.nav-toggle svg{width:22px;height:22px;stroke:var(--text)}

.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:70;background:var(--grad);box-shadow:0 0 12px rgba(45,212,191,.8);transition:width .1s linear}

/* ---------- hero ---------- */
.hero{position:relative;padding:72px 0 36px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-inner{max-width:800px;margin:0 auto;text-align:center}
.hero h1{font-size:clamp(2.5rem,6vw,4.4rem);margin:18px 0 0}
.hero .sub{font-size:1.12rem;color:var(--muted);max-width:54ch;margin:20px 0 28px}
.hero-inner .sub{margin-left:auto;margin-right:auto}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-inner .hero-cta{justify-content:center}
.hero-stats{display:flex;gap:36px;margin-top:34px;flex-wrap:wrap}
.hero-inner .hero-stats{justify-content:center}
.hero-inner{margin-bottom:26px}
.hero-calc{margin-top:6px}
.hero-stats .num{font-family:var(--font-head);font-size:1.9rem;font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats .lbl{font-size:.82rem;color:var(--muted-2);text-transform:uppercase;letter-spacing:.08em}

.hero-molecule{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.9}
.hero-molecule .node{fill:var(--teal)}
.hero-molecule .edge{stroke:rgba(99,102,241,.4);stroke-width:1}

/* floating molecule canvas in hero card */
.molecule-card{position:relative}

/* ---------- panels / cards ---------- */
.panel{
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  backdrop-filter:blur(8px);
}
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;transition:transform .35s var(--ease),border-color .35s,background .35s,box-shadow .35s;
}
.card:hover{transform:translateY(-5px);border-color:var(--border-2);background:var(--surface-2);box-shadow:var(--shadow)}

/* section heads */
.section{padding:84px 0}
.section-head{max-width:660px;margin:0 auto 52px;text-align:center}
.section-head h2{font-size:clamp(1.9rem,4vw,2.9rem);margin:14px 0 14px}
.section-head p{color:var(--muted);font-size:1.05rem}

/* feature grid */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature .ic{
  width:50px;height:50px;border-radius:14px;display:grid;place-items:center;margin-bottom:16px;
  background:var(--grad-soft);border:1px solid var(--border-2);
}
.feature .ic svg{width:26px;height:26px;stroke:var(--teal);fill:none;stroke-width:1.8}
.feature h3{font-size:1.18rem;margin-bottom:8px}
.feature p{color:var(--muted);font-size:.96rem}

/* ---------- calculator ---------- */
.calc-wrap{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:24px;align-items:start;max-width:1060px;margin:0 auto}
.calc-panel{padding:26px}
.calc-panel h3{font-size:1.35rem;margin-bottom:4px}
.calc-panel .hint{color:var(--muted);font-size:.92rem;margin-bottom:22px}
.field{margin-bottom:18px}
.field label{display:flex;justify-content:space-between;align-items:center;font-size:.86rem;font-weight:600;color:var(--text);margin-bottom:8px}
.field label .tag{font-size:.74rem;color:var(--muted-2);font-weight:500}
.input-row{display:flex;gap:10px}
.input,select.input{
  width:100%;background:rgba(0,0,0,.32);border:1px solid var(--border-2);border-radius:12px;
  color:var(--text);font-size:1rem;font-family:var(--font-body);padding:13px 14px;
  transition:border-color .2s,box-shadow .2s;
}
.input:focus,select.input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(45,212,191,.18)}
select.input{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='none' stroke='%2397a6c2' stroke-width='2'%3E%3Cpath d='M5 8l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:38px}
.unit-toggle{display:flex;background:rgba(0,0,0,.32);border:1px solid var(--border-2);border-radius:12px;padding:4px;gap:4px}
.unit-toggle button{flex:1;background:none;border:none;color:var(--muted);font-weight:600;font-size:.86rem;padding:9px;border-radius:8px;cursor:pointer;transition:.2s}
.unit-toggle button.on{background:var(--grad);color:#05131a}

/* results */
.calc-output{padding:26px;display:flex;flex-direction:column}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:22px}
.result{background:rgba(0,0,0,.28);border:1px solid var(--border);border-radius:14px;padding:16px 18px}
.result .k{font-size:.76rem;color:var(--muted-2);text-transform:uppercase;letter-spacing:.07em;margin-bottom:6px}
.result .v{font-family:var(--font-head);font-size:1.5rem;font-weight:700;color:var(--text)}
.result .v small{font-size:.8rem;color:var(--muted);font-weight:500}
.result.hl{background:var(--grad-soft);border-color:var(--border-2)}
.result.hl .v{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- syringe ---------- */
.syringe-stage{margin-top:auto;padding-top:10px}
.syringe-label{display:flex;justify-content:space-between;font-size:.8rem;color:var(--muted);margin-bottom:10px}
.syringe-svg{width:100%;height:auto}
.syringe-liquid{transition:width .6s var(--ease)}
.syringe-plunger{transition:transform .6s var(--ease)}
.syringe-meniscus{transition:transform .6s var(--ease)}
.fill-callout{transition:transform .6s var(--ease)}

/* ---------- peptide library ---------- */
.lib-controls{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-bottom:26px}
.search-box{position:relative;flex:1;min-width:240px}
.search-box svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;stroke:var(--muted);fill:none;stroke-width:2}
.search-box input{width:100%;background:rgba(0,0,0,.32);border:1px solid var(--border-2);border-radius:999px;color:var(--text);font-size:.96rem;padding:12px 16px 12px 42px}
.search-box input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(45,212,191,.18)}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{
  font-family:var(--font-head);font-size:.8rem;font-weight:600;padding:8px 14px;border-radius:999px;cursor:pointer;
  background:var(--surface-2);border:1px solid var(--border);color:var(--muted);transition:.2s;
}
.chip:hover{color:var(--text);border-color:var(--border-2)}
.chip.on{background:var(--grad);color:#05131a;border-color:transparent}

.pep-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.pep-card{display:flex;flex-direction:column;cursor:pointer;position:relative;overflow:hidden}
.pep-card::after{content:"";position:absolute;inset:0;border-radius:var(--radius);background:radial-gradient(400px 200px at var(--mx,50%) 0%,rgba(45,212,191,.1),transparent 60%);opacity:0;transition:opacity .3s}
.pep-card:hover::after{opacity:1}
.pep-card .cat{align-self:flex-start;font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;padding:5px 10px;border-radius:999px;margin-bottom:14px}
.pep-card h3{font-size:1.22rem;margin-bottom:3px}
.pep-card .alias{font-size:.82rem;color:var(--muted-2);margin-bottom:12px}
.pep-card .blurb{font-size:.9rem;color:var(--muted);flex:1;margin-bottom:16px}
.pep-card .meta{display:flex;gap:16px;font-size:.78rem;color:var(--muted-2);border-top:1px solid var(--border);padding-top:14px}
.pep-card .meta b{display:block;color:var(--text);font-family:var(--font-head);font-size:.92rem;margin-top:2px}
.pep-card .go{position:absolute;top:22px;right:22px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--surface-2);border:1px solid var(--border);transition:.3s}
.pep-card .go svg{width:15px;height:15px;stroke:var(--teal);fill:none;stroke-width:2}
.pep-card:hover .go{background:var(--grad);transform:translate(2px,-2px)}
.pep-card:hover .go svg{stroke:#05131a}

.cat-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px;vertical-align:middle}

/* ---------- peptide detail ---------- */
.detail-hero{padding:40px 0 10px}
.back-link{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:.9rem;margin-bottom:22px;transition:.2s}
.back-link:hover{color:var(--teal)}
.back-link svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2}
.detail-head{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;flex-wrap:wrap}
.detail-head h1{font-size:clamp(2rem,5vw,3.2rem)}
.detail-head .alias{color:var(--muted);font-size:1.05rem;margin-top:8px}
.detail-cols{display:grid;grid-template-columns:1.6fr 1fr;gap:24px;margin-top:34px;align-items:start}
.detail-main .block{margin-bottom:26px}
.detail-main h3{font-size:1.25rem;margin-bottom:12px;display:flex;align-items:center;gap:9px}
.detail-main h3 svg{width:20px;height:20px;stroke:var(--teal);fill:none;stroke-width:1.8}
.detail-main p{color:var(--muted);margin-bottom:10px}
.pc-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.pc-card{padding:20px}
.pc-card h4{font-family:var(--font-head);font-size:1rem;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.pc-card.pros h4{color:var(--teal)}
.pc-card.cons h4{color:#fb7185}
.pc-card ul{list-style:none;margin:0;padding:0}
.pc-card li{position:relative;padding-left:24px;margin-bottom:10px;font-size:.92rem;color:var(--muted)}
.pc-card li svg{position:absolute;left:0;top:3px;width:16px;height:16px;stroke-width:2;fill:none}
.pc-card.pros li svg{stroke:var(--teal)}
.pc-card.cons li svg{stroke:#fb7185}

.spec-list{list-style:none;margin:0;padding:0}
.spec-list li{display:flex;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px solid var(--border);font-size:.92rem}
.spec-list li:last-child{border-bottom:none}
.spec-list .k{color:var(--muted)}
.spec-list .v{color:var(--text);font-weight:600;text-align:right}

.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}

/* ---------- tracker ---------- */
.tracker-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:24px;align-items:start}
.log-list{display:flex;flex-direction:column;gap:12px}
.log-item{display:flex;align-items:center;gap:14px;padding:16px 18px;background:var(--surface);border:1px solid var(--border);border-radius:14px;transition:.25s}
.log-item:hover{border-color:var(--border-2);background:var(--surface-2)}
.log-item .dot{width:10px;height:10px;border-radius:50%;flex:none}
.log-item .info{flex:1}
.log-item .info b{font-family:var(--font-head);font-size:1rem}
.log-item .info span{display:block;font-size:.82rem;color:var(--muted-2)}
.log-item .dose{font-family:var(--font-head);font-weight:700;color:var(--teal)}
.log-item .del{background:none;border:none;color:var(--muted-2);cursor:pointer;padding:6px;border-radius:8px;transition:.2s}
.log-item .del:hover{color:#fb7185;background:rgba(251,113,133,.12)}
.log-item .del svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2}
.empty-state{text-align:center;padding:50px 20px;color:var(--muted-2)}
.empty-state svg{width:54px;height:54px;stroke:var(--muted-2);fill:none;stroke-width:1.4;margin:0 auto 16px}

.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:22px}
.stat-box{padding:18px;text-align:center}
.stat-box .n{font-family:var(--font-head);font-size:1.7rem;font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-box .l{font-size:.78rem;color:var(--muted-2);text-transform:uppercase;letter-spacing:.06em}

.week-chart{display:flex;align-items:flex-end;gap:10px;height:140px;padding:14px 0}
.week-chart .bar-wrap{flex:1;display:flex;flex-direction:column;align-items:center;gap:8px;height:100%;justify-content:flex-end}
.week-chart .bar{width:100%;max-width:34px;border-radius:8px 8px 4px 4px;background:var(--grad);min-height:4px;transition:height .6s var(--ease)}
.week-chart .day{font-size:.74rem;color:var(--muted-2)}

/* ---------- brand kit page ---------- */
.swatch-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px}
.swatch{border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--border)}
.swatch .col{height:90px}
.swatch .meta{padding:12px 14px;background:var(--surface)}
.swatch .meta b{font-family:var(--font-head);font-size:.9rem;display:block}
.swatch .meta span{font-size:.78rem;color:var(--muted-2);font-variant-numeric:tabular-nums}
.logo-board{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}
.logo-tile{padding:30px;display:flex;align-items:center;justify-content:center;min-height:140px;border-radius:var(--radius)}
.logo-tile.on-dark{background:#070b14;border:1px solid var(--border)}
.logo-tile.on-light{background:#eef2fb}
.logo-tile.on-grad{background:var(--grad)}
.logo-tile img{height:48px;width:auto;max-width:100%}
.type-row{display:flex;align-items:baseline;gap:18px;padding:18px 0;border-bottom:1px solid var(--border);flex-wrap:wrap}
.type-row .demo{font-family:var(--font-head)}
.type-row .info{color:var(--muted-2);font-size:.84rem}

/* ---------- disclaimer / banner ---------- */
.disclaimer{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border-radius:var(--radius);
  background:rgba(245,158,11,.07);border:1px solid rgba(245,158,11,.28);
}
.disclaimer svg{width:22px;height:22px;flex:none;stroke:#f59e0b;fill:none;stroke-width:1.8;margin-top:1px}
.disclaimer p{font-size:.88rem;color:#e8d4ad}
.disclaimer b{color:#fbbf24}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--border);margin-top:60px;padding:54px 0 34px;background:linear-gradient(180deg,transparent,rgba(99,102,241,.04))}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px;margin-bottom:40px}
.footer .brand{margin-bottom:14px}
.footer p{color:var(--muted);font-size:.9rem;max-width:34ch}
.footer h5{font-family:var(--font-head);font-size:.82rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted-2);margin:0 0 14px}
.footer ul{list-style:none;margin:0;padding:0}
.footer li{margin-bottom:9px}
.footer li a{color:var(--muted);font-size:.92rem;transition:.2s}
.footer li a:hover{color:var(--teal)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding-top:24px;border-top:1px solid var(--border);font-size:.84rem;color:var(--muted-2)}

/* ---------- scroll reveal ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}
.reveal.d2{transition-delay:.16s}
.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .syringe-liquid,.syringe-plunger,.syringe-meniscus,.fill-callout,.week-chart .bar{transition:none}
}

/* card entrance (used for injected grid cards) */
@keyframes cardIn{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.pep-card{animation:cardIn .55s var(--ease) backwards}
@media (prefers-reduced-motion:reduce){.pep-card{animation:none}}

/* float anim */
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes pulse-ring{0%{transform:scale(.9);opacity:.7}70%{transform:scale(1.5);opacity:0}100%{opacity:0}}
@keyframes spin-slow{to{transform:rotate(360deg)}}
@keyframes dash{to{stroke-dashoffset:-1000}}

.float{animation:floaty 6s ease-in-out infinite}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .calc-wrap{grid-template-columns:1fr}
  .detail-cols{grid-template-columns:1fr}
  .tracker-grid{grid-template-columns:1fr}
  .features{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav-links{
    position:fixed;top:70px;right:0;left:0;flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(8,12,22,.97);backdrop-filter:blur(18px);padding:16px 18px;border-bottom:1px solid var(--border);
    transform:translateY(-130%);transition:transform .35s var(--ease);
  }
  .nav-links.open{transform:none}
  .nav-toggle{display:block}
  .nav-cta{margin:6px 0 0}
  .features{grid-template-columns:1fr}
  .result-grid{grid-template-columns:1fr}
  .pc-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:60px 0}
  .hero{padding:36px 0 20px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .hero-stats{gap:20px}
}

/* utility */
.center{text-align:center}
.mt-l{margin-top:40px}
.mb-l{margin-bottom:40px}
.hidden{display:none!important}
.divider{height:1px;background:var(--border);margin:40px 0}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:.74rem;font-weight:600;padding:5px 11px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border);color:var(--muted)}

/* ============================================================
   INTERACTIVE LAYER
   ============================================================ */

/* tilt / magnetic helpers */
.tilt{transform-style:preserve-3d;transition:transform .18s var(--ease)}
.tilt-inner{transform:translateZ(20px)}
@media (hover:none){.tilt{transform:none!important}}

/* kbd */
kbd{font-family:var(--font-head);font-size:.72rem;background:var(--surface-3);border:1px solid var(--border-2);border-bottom-width:2px;border-radius:6px;padding:2px 6px;color:var(--text);line-height:1}

/* toast */
.toast-wrap{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);z-index:200;display:flex;flex-direction:column;gap:10px;align-items:center;pointer-events:none}
.toast{display:flex;align-items:center;gap:10px;background:rgba(12,18,32,.96);border:1px solid var(--border-2);border-radius:12px;padding:12px 18px;color:var(--text);font-size:.9rem;font-weight:500;box-shadow:var(--shadow);backdrop-filter:blur(14px);transform:translateY(20px);opacity:0;transition:transform .35s var(--ease),opacity .35s;max-width:90vw}
.toast.in{transform:none;opacity:1}
.toast svg{width:18px;height:18px;flex:none}
.toast.ok svg{stroke:var(--teal)}
.toast.info svg{stroke:var(--indigo)}
.toast.warn svg{stroke:#f59e0b}

/* command palette */
.cmdk-btn{display:inline-flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;color:var(--muted);font-size:.84rem;padding:8px 12px;cursor:pointer;transition:.2s}
.cmdk-btn:hover{color:var(--text);border-color:var(--border-2)}
.cmdk-btn svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}
.cmdk-overlay{position:fixed;inset:0;z-index:300;background:rgba(3,6,12,.7);backdrop-filter:blur(8px);display:flex;align-items:flex-start;justify-content:center;padding-top:13vh;opacity:0;pointer-events:none;transition:opacity .2s}
.cmdk-overlay.open{opacity:1;pointer-events:auto}
.cmdk{width:min(640px,92vw);background:linear-gradient(180deg,rgba(16,22,38,.98),rgba(10,14,28,.98));border:1px solid var(--border-2);border-radius:18px;box-shadow:var(--shadow);overflow:hidden;transform:translateY(-14px) scale(.98);transition:transform .25s var(--ease)}
.cmdk-overlay.open .cmdk{transform:none}
.cmdk-top{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--border)}
.cmdk-top svg{width:20px;height:20px;stroke:var(--teal);fill:none;stroke-width:2;flex:none}
.cmdk-top input{flex:1;background:none;border:none;outline:none;color:var(--text);font-size:1.05rem;font-family:var(--font-body)}
.cmdk-list{max-height:52vh;overflow-y:auto;padding:8px}
.cmdk-group{font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted-2);padding:10px 12px 6px}
.cmdk-item{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:11px;cursor:pointer;color:var(--text)}
.cmdk-item .ic{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;background:var(--surface-2);border:1px solid var(--border);flex:none}
.cmdk-item .ic svg{width:17px;height:17px;stroke:var(--teal);fill:none;stroke-width:1.9}
.cmdk-item .t{flex:1;min-width:0}
.cmdk-item .t b{font-weight:600;font-size:.95rem;display:block}
.cmdk-item .t span{font-size:.78rem;color:var(--muted-2);display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cmdk-item .tag{font-size:.68rem;color:var(--muted-2);font-family:var(--font-head)}
.cmdk-item.sel,.cmdk-item:hover{background:var(--surface-2)}
.cmdk-item.sel{outline:1px solid var(--border-2)}
.cmdk-empty{padding:30px;text-align:center;color:var(--muted-2);font-size:.9rem}
.cmdk-foot{display:flex;gap:14px;padding:10px 16px;border-top:1px solid var(--border);font-size:.74rem;color:var(--muted-2)}
.cmdk-foot span{display:inline-flex;align-items:center;gap:5px}

/* back to top */
.to-top{position:fixed;right:22px;bottom:22px;z-index:120;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:var(--grad);border:none;cursor:pointer;box-shadow:0 10px 26px -8px rgba(45,212,191,.6);opacity:0;transform:translateY(20px) scale(.8);pointer-events:none;transition:.3s var(--ease)}
.to-top.show{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{transform:translateY(-3px)}
.to-top svg{width:20px;height:20px;stroke:#05131a;fill:none;stroke-width:2.4}

/* range slider */
.range{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:999px;background:linear-gradient(90deg,var(--teal) var(--p,30%),rgba(255,255,255,.1) var(--p,30%));outline:none;margin-top:4px;cursor:pointer}
.range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:#fff;border:3px solid var(--teal);box-shadow:0 2px 8px rgba(0,0,0,.4);cursor:grab;transition:transform .15s}
.range::-webkit-slider-thumb:active{cursor:grabbing;transform:scale(1.18)}
.range::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:3px solid var(--teal);cursor:grab}

/* stepper */
.stepper{display:flex;align-items:center}
.stepper button{width:42px;flex:none;background:rgba(0,0,0,.32);border:1px solid var(--border-2);color:var(--text);font-size:1.2rem;cursor:pointer;transition:.2s;display:grid;place-items:center}
.stepper button:hover{background:var(--surface-3);color:var(--teal)}
.stepper button:first-child{border-radius:12px 0 0 12px;border-right:none}
.stepper button:last-child{border-radius:0 12px 12px 0;border-left:none}
.stepper .input{border-radius:0;text-align:center;flex:1;min-width:0;width:auto}

/* copy chip on results */
.result{position:relative}
.result .copy-btn{position:absolute;top:10px;right:10px;width:26px;height:26px;border-radius:7px;display:grid;place-items:center;background:var(--surface-2);border:1px solid var(--border);cursor:pointer;opacity:0;transition:.2s}
.result:hover .copy-btn{opacity:1}
.result .copy-btn svg{width:13px;height:13px;stroke:var(--muted);fill:none;stroke-width:2}
.result .copy-btn:hover svg{stroke:var(--teal)}

/* syringe drag affordance */
#rc-syringe-vis,#det-syringe-vis{cursor:ew-resize;touch-action:none;user-select:none}
.drag-hint{display:flex;align-items:center;gap:7px;justify-content:center;font-size:.78rem;color:var(--muted-2);margin-top:8px}
.drag-hint svg{width:15px;height:15px;stroke:var(--teal);fill:none;stroke-width:2}

/* library toolbar */
.lib-toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between;margin-bottom:18px}
.lib-toolbar .left{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.lib-count{font-size:.86rem;color:var(--muted)}
.lib-count b{color:var(--teal);font-family:var(--font-head)}
.mini-select{background:rgba(0,0,0,.32);border:1px solid var(--border-2);border-radius:10px;color:var(--text);font-size:.84rem;padding:8px 30px 8px 12px;appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='none' stroke='%2397a6c2' stroke-width='2'%3E%3Cpath d='M4 7l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 9px center}
.view-toggle{display:flex;background:rgba(0,0,0,.32);border:1px solid var(--border-2);border-radius:10px;padding:3px}
.view-toggle button{width:34px;height:30px;display:grid;place-items:center;background:none;border:none;border-radius:7px;cursor:pointer;color:var(--muted-2);transition:.2s}
.view-toggle button.on{background:var(--grad);color:#05131a}
.view-toggle button svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2}
.icon-btn{display:inline-flex;align-items:center;gap:7px;background:var(--surface-2);border:1px solid var(--border-2);border-radius:10px;color:var(--text);font-size:.84rem;font-weight:600;padding:8px 13px;cursor:pointer;transition:.2s}
.icon-btn:hover{border-color:var(--teal);color:var(--teal)}
.icon-btn svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}

/* list view */
.pep-grid.list{grid-template-columns:1fr}
.pep-grid.list .pep-card{flex-direction:row;align-items:center;gap:18px;padding:16px 20px}
.pep-grid.list .pep-card .cat{position:static;margin:0;order:0;align-self:center}
.pep-grid.list .pep-card h3{margin:0}
.pep-grid.list .pep-card .alias{margin:0}
.pep-grid.list .pep-card .blurb{display:none}
.pep-grid.list .pep-card .meta{border:none;padding:0;margin:0}
.pep-grid.list .pep-card .go{position:static}
.pep-grid.list .pep-card .name-wrap{flex:1;min-width:0}

/* compare */
.cmp-check{position:absolute;top:18px;left:18px;width:24px;height:24px;border-radius:7px;border:1px solid var(--border-2);background:rgba(0,0,0,.4);display:grid;place-items:center;cursor:pointer;z-index:3;transition:.2s;opacity:.4}
.pep-card:hover .cmp-check,.cmp-check.on{opacity:1}
.cmp-check.on{background:var(--grad);border-color:transparent}
.cmp-check svg{width:14px;height:14px;stroke:#05131a;fill:none;stroke-width:3;opacity:0}
.cmp-check.on svg{opacity:1}
.pep-card.cmp-pad .cat{margin-left:34px}
.cmp-bar{position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(140%);z-index:130;display:flex;align-items:center;gap:14px;background:rgba(12,18,32,.97);border:1px solid var(--border-2);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);backdrop-filter:blur(14px);transition:transform .35s var(--ease)}
.cmp-bar.show{transform:translateX(-50%)}
.cmp-bar .pills{display:flex;gap:8px}
.cmp-bar .pill{display:flex;align-items:center;gap:7px;background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:6px 8px 6px 12px;font-size:.84rem;font-weight:600}
.cmp-bar .pill button{background:none;border:none;color:var(--muted-2);cursor:pointer;display:grid;place-items:center}
.cmp-bar .pill button svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2}

/* modal */
.modal-overlay{position:fixed;inset:0;z-index:310;background:rgba(3,6,12,.74);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;padding:24px;opacity:0;pointer-events:none;transition:opacity .2s}
.modal-overlay.open{opacity:1;pointer-events:auto}
.modal{width:min(900px,96vw);max-height:88vh;overflow:auto;background:linear-gradient(180deg,rgba(16,22,38,.99),rgba(10,14,28,.99));border:1px solid var(--border-2);border-radius:20px;box-shadow:var(--shadow);transform:scale(.97);transition:transform .25s var(--ease)}
.modal-overlay.open .modal{transform:none}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;border-bottom:1px solid var(--border);position:sticky;top:0;background:rgba(12,16,30,.9);backdrop-filter:blur(10px)}
.modal-head h3{font-size:1.2rem}
.modal-close{background:var(--surface-2);border:1px solid var(--border);border-radius:9px;width:34px;height:34px;display:grid;place-items:center;cursor:pointer}
.modal-close svg{width:17px;height:17px;stroke:var(--text);fill:none;stroke-width:2}
.cmp-table{width:100%;border-collapse:collapse}
.cmp-table th,.cmp-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top;font-size:.9rem}
.cmp-table th{position:sticky;left:0}
.cmp-table thead th{font-family:var(--font-head);font-size:1rem}
.cmp-table .rowlabel{color:var(--muted-2);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;white-space:nowrap}
.cmp-table td ul{margin:0;padding-left:16px}
.cmp-table td li{margin-bottom:5px;color:var(--muted)}

/* detail extras */
.det-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.pep-nav{display:flex;justify-content:space-between;gap:14px;margin-top:40px}
.pep-nav a{display:flex;align-items:center;gap:12px;padding:16px 20px;border-radius:14px;background:var(--surface);border:1px solid var(--border);transition:.25s;max-width:48%}
.pep-nav a:hover{border-color:var(--border-2);background:var(--surface-2);transform:translateY(-3px)}
.pep-nav a.next{margin-left:auto;text-align:right;flex-direction:row-reverse}
.pep-nav svg{width:20px;height:20px;stroke:var(--teal);fill:none;stroke-width:2;flex:none}
.pep-nav .lbl{font-size:.72rem;color:var(--muted-2);text-transform:uppercase;letter-spacing:.07em}
.pep-nav b{font-family:var(--font-head);font-size:1rem}

/* decay chart */
.decay-wrap{position:relative}
.decay-chart{width:100%;height:auto;overflow:visible}
.decay-chart .area{fill:url(#decayfill)}
.decay-chart .line{fill:none;stroke:var(--teal);stroke-width:2.5;stroke-linecap:round}
.decay-chart .grid{stroke:rgba(255,255,255,.07);stroke-width:1}
.decay-chart .axlabel{fill:var(--muted-2);font-size:10px;font-family:var(--font-head)}
.decay-dot{fill:#fff;stroke:var(--teal);stroke-width:2.5}
.decay-readout{position:absolute;top:8px;right:10px;background:var(--surface-2);border:1px solid var(--border);border-radius:9px;padding:8px 12px;font-size:.8rem;pointer-events:none}
.decay-readout b{font-family:var(--font-head);color:var(--teal)}

/* tracker: heatmap */
.heatmap{display:flex;gap:3px;overflow-x:auto;padding-bottom:6px}
.heatmap .col{display:flex;flex-direction:column;gap:3px}
.heatmap .cell{width:13px;height:13px;border-radius:3px;background:var(--surface-2);border:1px solid var(--border);transition:.15s;cursor:default}
.heatmap .cell[data-c="1"]{background:rgba(45,212,191,.35)}
.heatmap .cell[data-c="2"]{background:rgba(45,212,191,.6)}
.heatmap .cell[data-c="3"]{background:rgba(45,212,191,.85)}
.heatmap .cell:hover{outline:1.5px solid #fff;transform:scale(1.25)}
.heat-legend{display:flex;align-items:center;gap:6px;justify-content:flex-end;font-size:.74rem;color:var(--muted-2);margin-top:8px}
.heat-legend .cell{width:12px;height:12px;border-radius:3px;border:1px solid var(--border)}

/* tracker: chart tooltip + bars */
.week-chart .bar-wrap{cursor:pointer;position:relative}
.week-chart .bar:hover{filter:brightness(1.2)}
.chart-tip{position:absolute;bottom:100%;left:50%;transform:translateX(-50%) translateY(-6px);background:rgba(12,18,32,.97);border:1px solid var(--border-2);border-radius:8px;padding:5px 9px;font-size:.74rem;white-space:nowrap;pointer-events:none;opacity:0;transition:.15s;z-index:5}
.bar-wrap:hover .chart-tip{opacity:1}
.history-tools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.log-item .edit{background:none;border:none;color:var(--muted-2);cursor:pointer;padding:6px;border-radius:8px;transition:.2s}
.log-item .edit:hover{color:var(--teal);background:rgba(45,212,191,.12)}
.log-item .edit svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}
.seg{display:flex;background:rgba(0,0,0,.32);border:1px solid var(--border-2);border-radius:10px;padding:3px}
.seg button{background:none;border:none;color:var(--muted);font-size:.8rem;font-weight:600;padding:6px 12px;border-radius:7px;cursor:pointer;transition:.2s}
.seg button.on{background:var(--grad);color:#05131a}

/* brand: recolor playground */
.recolor{display:grid;grid-template-columns:auto 1fr;gap:16px 22px;align-items:center}
.recolor .logo-preview{grid-row:span 4;background:#070b14;border:1px solid var(--border);border-radius:16px;padding:24px;display:grid;place-items:center;min-height:180px}
.color-pick{display:flex;align-items:center;gap:12px}
.color-pick input[type=color]{width:46px;height:38px;border:1px solid var(--border-2);border-radius:10px;background:none;cursor:pointer;padding:2px}
.color-pick .hex{font-family:var(--font-head);font-size:.9rem;color:var(--muted)}
.theme-swatches{display:flex;gap:10px;flex-wrap:wrap}
.theme-dot{width:34px;height:34px;border-radius:10px;cursor:pointer;border:2px solid transparent;transition:.2s}
.theme-dot:hover{transform:scale(1.1)}
.theme-dot.on{border-color:#fff}
.swatch,.theme-dot,.copyable{cursor:pointer}
.swatch{transition:transform .2s}
.swatch:hover{transform:translateY(-3px)}
.icon-copy{cursor:pointer}
.icon-copy:hover{border-color:var(--teal)!important}

/* nav search button placement */
.nav-search{margin-right:4px}
@media (max-width:760px){.nav-search{display:none}}

/* reveal stagger for injected detail */
.det-fade{opacity:0;transform:translateY(14px);animation:cardIn .5s var(--ease) forwards}

/* calculator deep-dive explanations */
.explain-card{padding:30px}
.explain-card .lead{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.explain-card .num-badge{width:46px;height:46px;flex:none;border-radius:13px;display:grid;place-items:center;font-family:var(--font-head);font-weight:700;font-size:1.3rem;background:var(--grad-soft);border:1px solid var(--border-2);background-clip:padding-box}
.explain-card .num-badge span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.explain-card h3{font-size:1.4rem}
.explain-card .sub2{color:var(--muted-2);font-size:.86rem}
.explain-card h4{font-family:var(--font-head);font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--teal);margin:18px 0 8px}
.explain-card p{color:var(--muted)}
.formula-box{background:rgba(0,0,0,.34);border:1px solid var(--border-2);border-radius:12px;padding:14px 16px;font-family:'Space Grotesk',ui-monospace,monospace;font-size:.92rem;color:var(--teal);margin:6px 0;overflow-x:auto;line-height:1.9}
.formula-box .eq{color:var(--text)}
.formula-box .res{color:#fff;font-weight:700}
.example-box{background:var(--grad-soft);border:1px solid var(--border-2);border-radius:12px;padding:14px 16px;font-size:.92rem;color:var(--text);margin:6px 0}
.example-box b{color:var(--teal)}

/* dosing protocol table */
.dose-table{width:100%;border-collapse:collapse;font-size:.9rem;background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden}
.dose-table th,.dose-table td{padding:13px 15px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top}
.dose-table thead th{font-family:var(--font-head);font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted-2);background:rgba(255,255,255,.03)}
.dose-table .rowlabel{font-weight:600;color:var(--text);white-space:normal;min-width:120px}
.dose-table .base{color:var(--teal);font-weight:600}
.dose-table .why{font-size:.78rem;color:var(--muted-2);margin-top:5px}
.dose-table tbody tr:last-child td{border-bottom:none}
@media (max-width:560px){.dose-table{font-size:.82rem}.dose-table th,.dose-table td{padding:10px}}