/* =============================================================================
   Helix — colorful peptide-science boutique design system
   "Colorful science, serious standards." Vivid, alive, premium, trustworthy.
   Hand-authored, no build step. Family color is passed per element as --c.
   ========================================================================== */
:root{
  /* trust anchors */
  --ink:#071821;            /* deep ink — primary text + serious surfaces */
  --ink-2:#0d2a35;
  --paper:#f7fbfb;          /* calm page background */
  --paper-2:#eef5f5;
  --white:#ffffff;
  --line:#dce8e8;
  --muted:#5a727a;

  /* brand + science spectrum */
  --royal:#1e3aa6;           /* Helix royal blue — primary brand (logo) */
  --royal-d:#16307f;
  --royal-l:#e8edfb;
  --gold:#c79324;            /* metallic gold — accent / verification (logo) */
  --gold-d:#9a6f17;
  --gold-l:#f3d27a;
  --teal:var(--royal);       /* back-compat alias (brand is now royal blue) */
  --cobalt:#246bfe;         /* scientific confidence */
  --emerald:#16b36a;        /* quality / verification */
  --coral:#ff6b5f;          /* warmth / human energy */
  --sun:#ffc857;            /* optimism / wayfinding */
  --amber:#f59e0b;
  --lavender:#8b5cf6;       /* boutique science */
  --berry:#d946ef;          /* accent only */
  --sky:#06b6d4;

  /* default family accent (overridden per card/page via --c) */
  --c:var(--royal);

  /* legacy aliases — keep dormant cart/checkout + brand refs working */
  --brand:var(--royal);
  --brand-d:var(--royal-d);
  --brand-l:var(--royal-l);
  --accent:var(--cobalt);

  --danger:#c2410c;
  --warn-bg:#fff6e6;
  --warn-line:#f3dcab;

  --radius:18px;
  --radius-s:12px;
  --radius-pill:999px;
  --shadow:0 2px 6px rgba(7,24,33,.05),0 14px 34px -16px rgba(7,24,33,.20);
  --shadow-lg:0 30px 70px -26px rgba(7,24,33,.42);
  --maxw:1180px;
  --font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --serif:'Fraunces',Georgia,'Times New Roman',serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
/* readable text shade of any family color */
*{--ct:color-mix(in srgb,var(--c) 76%,#06202a)}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--paper);
  line-height:1.62;font-size:17px;-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--royal-d);text-decoration:none}
a:hover{color:var(--ink)}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.08;margin:0 0 .5em;font-weight:500;letter-spacing:-.015em;color:var(--ink)}
h1{font-size:clamp(2.5rem,5.4vw,4rem);font-weight:600}
h2{font-size:clamp(1.85rem,3.4vw,2.7rem)}
h3{font-size:1.34rem;font-weight:500}
p{margin:0 0 1rem}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--mono);font-size:.74rem;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ct);font-weight:600;margin-bottom:1rem}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--c)}
.muted{color:var(--muted)}
.center{text-align:center}
.center .eyebrow{justify-content:center}
.section{padding:84px 0;position:relative}
.section.tight{padding:56px 0}
.section.alt{background:var(--white)}
.section.ink{background:
  radial-gradient(900px 500px at 88% -10%,rgba(0,191,166,.22),transparent 60%),
  radial-gradient(700px 500px at 6% 120%,rgba(36,107,254,.20),transparent 60%),
  var(--ink);color:#cfe6e6}
.section.ink h2,.section.ink h3{color:#fff}
.lead{font-size:1.2rem;color:var(--ink-2);line-height:1.55}
.maxr{max-width:680px}
.maxr.center{margin-left:auto;margin-right:auto}

/* colorful spectrum ribbon — section separator / band */
.ribbon{height:6px;width:100%;border:0;margin:0;
  background:linear-gradient(90deg,var(--coral),var(--sun),var(--emerald),var(--royal),var(--sky),var(--cobalt),var(--lavender),var(--berry))}
.ribbon.thin{height:4px}
.section.alt+.section .ribbon,.band{display:block}

/* ---------------------------------------------------------------- buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;border:1.5px solid transparent;
  font-weight:700;font-size:.98rem;padding:.82rem 1.5rem;border-radius:var(--radius-pill);cursor:pointer;
  transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease,border-color .16s ease;
  line-height:1;white-space:nowrap;text-align:center}
.btn-primary{background:var(--royal);color:#fff;box-shadow:0 10px 24px -12px rgba(30,58,166,.65)}
.btn-primary:hover{background:var(--royal-d);color:#fff;transform:translateY(-2px);box-shadow:0 16px 30px -12px rgba(30,58,166,.7)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--c);color:var(--ct);transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--ink);border-color:transparent}
.btn-light:hover{background:var(--paper-2);transform:translateY(-2px)}
/* family-tinted button (uses --c) */
.btn-c{background:var(--c);color:#fff;box-shadow:0 10px 24px -12px var(--c)}
.btn-c:hover{filter:brightness(.94);transform:translateY(-2px);color:#fff}
.btn-block{width:100%;justify-content:center}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}
.btn-sm{padding:.55rem 1rem;font-size:.85rem}

/* ---------------------------------------------------------------- header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,251,251,.82);
  backdrop-filter:saturate(170%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:18px}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:800;font-size:1.2rem;
  letter-spacing:-.025em;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand svg{height:30px;width:auto;flex:none}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--ink-2);font-weight:600;font-size:.95rem;padding:.5rem .7rem;border-radius:var(--radius-pill);
  transition:background .15s,color .15s}
.nav-links a:hover{color:var(--royal-d);background:var(--royal-l)}
.nav-links a[aria-current=page]{color:var(--royal-d);background:var(--royal-l)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;border:1.5px solid var(--line);background:#fff;border-radius:12px;
  width:44px;height:44px;cursor:pointer;align-items:center;justify-content:center;color:var(--ink)}
.nav-toggle svg{width:22px;height:22px}

/* ---------------------------------------------------------------- RUO strip */
.ruo-strip{background:var(--ink);color:#bfe7e0;font-size:.8rem;text-align:center;
  padding:.5rem 12px;letter-spacing:.01em;position:relative;overflow:hidden}
.ruo-strip b{color:#fff}
.ruo-strip::after{content:"";position:absolute;inset:0;height:2px;top:auto;
  background:linear-gradient(90deg,var(--coral),var(--sun),var(--royal),var(--cobalt),var(--lavender))}

/* ---------------------------------------------------------------- hero */
.hero{position:relative;overflow:hidden;background:
  linear-gradient(180deg,#fff, var(--paper));padding-bottom:10px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;
  padding:78px 0 70px;position:relative;z-index:2}
.hero h1{margin-bottom:.5rem}
.hero h1 .hl{font-style:italic;font-weight:500;background:linear-gradient(120deg,var(--gold-d),var(--gold) 45%,#e7c25b);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{max-width:46ch}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:1.8rem}
.hero-cta .tertiary{align-self:center;font-weight:600;color:var(--muted)}
.hero-cta .tertiary:hover{color:var(--royal-d)}
.hero-meta{display:flex;gap:14px;margin-top:2.2rem;flex-wrap:wrap}
.hero-meta div{font-size:.82rem;color:var(--muted);background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:.7rem 1rem;box-shadow:var(--shadow)}
.hero-meta b{display:block;font-size:1.3rem;color:var(--ink);font-weight:800;letter-spacing:-.02em;margin-bottom:.1rem}
.hero-meta div:nth-child(1) b{color:var(--royal-d)}
.hero-meta div:nth-child(2) b{color:var(--cobalt)}
.hero-meta div:nth-child(3) b{color:var(--emerald)}
/* hero visual: living helix + molecules */
.hero-art{position:relative;aspect-ratio:1/1;border-radius:28px;overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-lg);background:
  radial-gradient(120% 120% at 20% 10%,#0d2a35,#071821);}
.hero-art svg{width:100%;height:100%}
.hero-art .h-strand{animation:dash 9s linear infinite}
.hero-art .h-float{animation:float 7s ease-in-out infinite}
.hero-art .h-float.b{animation-duration:9s;animation-delay:-2s}
.hero-art .h-float.c{animation-duration:11s;animation-delay:-4s}
/* parallax: JS sets --sc (0..1 scroll) */
.hero-deco{position:absolute;inset:0;z-index:1;pointer-events:none}

/* ---------------------------------------------------------------- grids */
.grid{display:grid;gap:24px}
.cols-2{grid-template-columns:repeat(2,1fr)}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}

/* ---------------------------------------------------------------- value / feature cards */
.vcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  transition:transform .18s ease,box-shadow .18s ease;position:relative;overflow:hidden}
.vcard::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--c)}
.vcard:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.vcard .ic{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;margin-bottom:16px;
  background:color-mix(in srgb,var(--c) 14%,#fff);color:var(--ct)}
.vcard .ic svg{width:26px;height:26px}
.vcard h3{font-size:1.1rem;margin-bottom:.35rem}
.vcard p{margin:0;font-size:.95rem;color:var(--muted)}
.vcard:nth-child(4n+1){--c:var(--royal)}
.vcard:nth-child(4n+2){--c:var(--cobalt)}
.vcard:nth-child(4n+3){--c:var(--emerald)}
.vcard:nth-child(4n+4){--c:var(--coral)}

/* ---------------------------------------------------------------- theme selector */
.theme-bar{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:0 auto 2.6rem}
.theme-chip{border:1.5px solid var(--line);background:#fff;border-radius:var(--radius-pill);
  padding:.5rem 1rem;font-weight:600;font-size:.9rem;cursor:pointer;color:var(--ink-2);
  display:inline-flex;align-items:center;gap:.5rem;transition:.15s}
.theme-chip .dot{width:11px;height:11px;border-radius:50%;background:var(--c);flex:none}
.theme-chip:hover{border-color:var(--c);color:var(--ct);transform:translateY(-2px)}
.theme-chip.active{background:var(--c);border-color:var(--c);color:#fff}
.theme-chip.active .dot{background:#fff}

/* theme overview grid (home) */
.theme-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.theme-tile{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;position:relative;overflow:hidden;transition:transform .18s,box-shadow .18s}
.theme-tile:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.theme-tile .tt-dot{width:34px;height:34px;border-radius:11px;background:var(--c);margin-bottom:14px;
  display:grid;place-items:center;color:#fff;box-shadow:0 8px 18px -8px var(--c)}
.theme-tile h3{font-size:1.02rem;margin-bottom:.3rem;color:var(--ink)}
.theme-tile p{font-size:.84rem;color:var(--muted);margin:0}
.theme-tile .tt-count{font-family:var(--mono);font-size:.7rem;color:var(--ct);margin-top:.7rem;display:block;font-weight:600}

/* ---------------------------------------------------------------- boutique peptide card */
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;position:relative}
.pcard::before{content:"";position:absolute;inset:0;border-radius:var(--radius);pointer-events:none;
  box-shadow:inset 0 0 0 0 var(--c);transition:box-shadow .2s}
.pcard:hover{transform:translateY(-5px);box-shadow:0 26px 50px -24px color-mix(in srgb,var(--c) 60%,transparent)}
.pcard:hover::before{box-shadow:inset 0 0 0 2px var(--c)}
.pcard .thumb{aspect-ratio:5/4;position:relative;background:
  radial-gradient(120% 120% at 80% 0%,color-mix(in srgb,var(--c) 26%,#0d2a35),#071821)}
.pcard .thumb svg{width:100%;height:100%}
.pcard .badge{position:absolute;top:12px;left:12px;font-family:var(--mono);font-size:.64rem;
  letter-spacing:.08em;text-transform:uppercase;font-weight:700;background:rgba(255,255,255,.94);
  color:var(--ink);padding:.32rem .6rem;border-radius:var(--radius-pill)}
.pcard .badge.lim{background:var(--c);color:#fff}
.pcard .body{padding:20px;display:flex;flex-direction:column;flex:1}
.pcard .cat{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ct);margin-bottom:.4rem;display:inline-flex;align-items:center;gap:.4rem;font-weight:600}
.pcard .cat::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--c)}
.pcard h3{font-size:1.18rem;margin-bottom:.25rem}
.pcard .pdesc{font-size:.9rem;color:var(--muted);margin:0 0 1rem;flex:1}
.pcard .qmarks{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:1rem}
.qtag{font-family:var(--mono);font-size:.66rem;font-weight:600;padding:.26rem .55rem;border-radius:var(--radius-pill);
  background:var(--paper-2);color:var(--ink-2);letter-spacing:.02em}
.qtag.v{background:color-mix(in srgb,var(--emerald) 14%,#fff);color:#0c7a47}
.pcard .pactions{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}
.purity-tag{font-size:.74rem;font-family:var(--mono);color:var(--muted)}

/* ---------------------------------------------------------------- peptide detail */
.pdetail{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.spec-table{width:100%;border-collapse:collapse;font-size:.94rem;margin:1.2rem 0}
.spec-table td{padding:.62rem 0;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table td:first-child{color:var(--muted);width:42%;font-weight:500}
.spec-table td:last-child{font-weight:600}
.seq{font-family:var(--mono);font-size:.8rem;word-break:break-word;background:var(--ink);color:#9fe6db;
  padding:.8rem .9rem;border-radius:12px;line-height:1.7}
/* snapshot card */
.snapshot{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;
  border-top:5px solid var(--c)}
.snapshot dl{margin:0;display:grid;gap:1rem}
.snapshot dt{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ct);font-weight:600;margin-bottom:.25rem}
.snapshot dd{margin:0;font-size:.95rem;color:var(--ink-2)}
.snapshot .chips{display:flex;gap:6px;flex-wrap:wrap}
.snapshot .chip{font-size:.78rem;font-weight:600;padding:.3rem .65rem;border-radius:var(--radius-pill);
  background:color-mix(in srgb,var(--c) 12%,#fff);color:var(--ct)}
.detail-actions{display:flex;gap:10px;flex-wrap:wrap;margin:1.5rem 0}

/* ---------------------------------------------------------------- research list */
.ra-list{list-style:none;padding:0;margin:0;display:grid;gap:.6rem}
.ra-list li{display:flex;gap:.6rem;align-items:flex-start;font-size:.96rem}
.ra-list li::before{content:"";flex:none;width:9px;height:9px;margin-top:.5rem;border-radius:3px;
  background:var(--c);transform:rotate(45deg)}

/* ---------------------------------------------------------------- quality timeline */
.timeline{position:relative;display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-top:2.6rem}
.timeline::before{content:"";position:absolute;top:26px;left:6%;right:6%;height:3px;border-radius:3px;
  background:linear-gradient(90deg,var(--coral),var(--sun),var(--emerald),var(--royal),var(--sky),var(--cobalt));
  transform:scaleX(0);transform-origin:left;transition:transform 1.1s ease}
.timeline.in::before{transform:scaleX(1)}
.tstep{text-align:center;position:relative;opacity:0;transform:translateY(10px);transition:.5s ease}
.timeline.in .tstep{opacity:1;transform:none}
.timeline.in .tstep:nth-child(1){transition-delay:.05s}
.timeline.in .tstep:nth-child(2){transition-delay:.2s}
.timeline.in .tstep:nth-child(3){transition-delay:.35s}
.timeline.in .tstep:nth-child(4){transition-delay:.5s}
.timeline.in .tstep:nth-child(5){transition-delay:.65s}
.timeline.in .tstep:nth-child(6){transition-delay:.8s}
.tstep .tnode{width:54px;height:54px;border-radius:16px;margin:0 auto 12px;display:grid;place-items:center;
  color:#fff;box-shadow:0 12px 24px -10px var(--c);background:var(--c)}
.tstep .tnode svg{width:26px;height:26px}
.tstep h4{font-size:.98rem;margin:0 0 .2rem}
.tstep p{font-size:.82rem;color:var(--muted);margin:0}
.tstep:nth-child(1){--c:var(--coral)}.tstep:nth-child(2){--c:var(--sun)}
.tstep:nth-child(3){--c:var(--emerald)}.tstep:nth-child(4){--c:var(--royal)}
.tstep:nth-child(5){--c:var(--sky)}.tstep:nth-child(6){--c:var(--cobalt)}

/* ---------------------------------------------------------------- COA library + badge */
.coa-badge{display:inline-flex;align-items:center;gap:.6rem;background:var(--ink);color:#fff;
  border-radius:14px;padding:.7rem 1.1rem;font-weight:700;font-size:.9rem;position:relative;overflow:hidden}
.coa-badge svg{width:20px;height:20px;color:var(--emerald)}
.coa-badge::after{content:"";position:absolute;top:0;bottom:0;width:40%;left:-50%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);
  animation:shine 3.4s ease-in-out infinite}
.coa-table{width:100%;border-collapse:collapse;font-size:.92rem;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden}
.coa-table th,.coa-table td{padding:.85rem 1rem;text-align:left;border-bottom:1px solid var(--line)}
.coa-table th{background:var(--paper-2);font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;
  text-transform:uppercase;color:var(--muted)}
.coa-table tr:last-child td{border-bottom:0}
.coa-table .cprod{font-weight:700;display:inline-flex;align-items:center;gap:.5rem}
.coa-table .cprod::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--c)}
.coa-row[hidden]{display:none}
.status-pill{font-family:var(--mono);font-size:.68rem;font-weight:700;padding:.24rem .6rem;border-radius:var(--radius-pill);
  text-transform:uppercase;letter-spacing:.05em}
.status-pill.current{background:color-mix(in srgb,var(--emerald) 16%,#fff);color:#0c7a47}
.status-pill.archived{background:var(--paper-2);color:var(--muted)}

/* ---------------------------------------------------------------- callouts / panels */
.note{border:1px solid var(--warn-line);background:var(--warn-bg);border-radius:14px;
  padding:16px 18px;font-size:.9rem;color:#7a5a1e}
.note b{color:#5e4413}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}

/* inquiry CTA */
.inquiry{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center;
  background:
   radial-gradient(700px 360px at 92% -20%,rgba(0,191,166,.26),transparent 60%),
   radial-gradient(560px 360px at -10% 120%,rgba(139,92,246,.24),transparent 60%),
   var(--ink);color:#fff;border-radius:26px;padding:48px}
.inquiry h2{color:#fff;margin-bottom:.4rem}
.inquiry p{color:#bcd9d6;margin:0}
.inquiry .iq-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------------------------------------------------------------- cart (kept, dormant) */
.cart-wrap{display:grid;grid-template-columns:1.5fr .9fr;gap:32px;align-items:start}
.cart-item{display:grid;grid-template-columns:84px 1fr auto;gap:16px;align-items:center;
  padding:18px 0;border-bottom:1px solid var(--line)}
.cart-item .ci-thumb{width:84px;height:64px;border-radius:12px;overflow:hidden;background:var(--ink)}
.cart-item .ci-thumb svg{width:100%;height:100%}
.cart-item h4{margin:0 0 .15rem;font-size:1rem}
.cart-item .ci-meta{font-size:.84rem;color:var(--muted)}
.ci-remove{background:none;border:0;color:var(--muted);cursor:pointer;font-size:.84rem;text-decoration:underline}
.ci-remove:hover{color:var(--danger)}
.summary{position:sticky;top:96px}
.summary .line{display:flex;justify-content:space-between;padding:.45rem 0;font-size:.95rem}
.summary .line.total{border-top:1px solid var(--line);margin-top:.5rem;padding-top:.9rem;font-size:1.2rem;font-weight:800}
.empty-cart{text-align:center;padding:60px 0}
.price{font-weight:800;font-size:1.15rem;letter-spacing:-.02em}
.price small{font-weight:500;color:var(--muted);font-size:.78rem}

/* ---------------------------------------------------------------- forms */
.field{margin-bottom:1rem}
.field label{display:block;font-weight:600;font-size:.9rem;margin-bottom:.4rem}
.field input,.field select,.field textarea{width:100%;padding:.85rem .95rem;border:1.5px solid var(--line);
  border-radius:12px;font:inherit;font-size:.96rem;background:#fff;color:var(--ink)}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--royal);
  box-shadow:0 0 0 4px var(--royal-l)}
.checkline{display:flex;gap:.6rem;align-items:flex-start;font-size:.88rem;color:var(--muted)}
.checkline input{margin-top:.25rem;width:18px;height:18px;flex:none;accent-color:var(--royal)}

/* newsletter / lab list */
.news{background:
   radial-gradient(600px 300px at 90% -30%,rgba(36,107,254,.3),transparent 60%),
   linear-gradient(135deg,var(--ink),var(--ink-2));color:#fff;border-radius:26px;
  padding:48px;display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center}
.news h2{color:#fff;margin-bottom:.3rem}
.news p{color:#aecfcd;margin:0}
.news form{display:flex;gap:10px;flex-wrap:wrap}
.news input{flex:1;min-width:220px;padding:.9rem 1.1rem;border-radius:var(--radius-pill);border:1px solid #244852;
  background:#0a242e;color:#fff;font:inherit}
.news input::placeholder{color:#7fa3a3}

/* ---------------------------------------------------------------- footer */
.site-footer{background:var(--ink);color:#9fc0c0;padding:64px 0 30px;font-size:.92rem;position:relative}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;
  background:linear-gradient(90deg,var(--coral),var(--sun),var(--emerald),var(--royal),var(--sky),var(--cobalt),var(--lavender),var(--berry))}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.site-footer h4{color:#fff;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;
  font-family:var(--mono);margin-bottom:1rem}
.site-footer a{color:#9fc0c0;display:block;padding:.24rem 0}
.site-footer a:hover{color:#fff}
.foot-brand .brand{color:#fff;margin-bottom:.8rem}
.foot-disc{font-size:.82rem;color:#6f9293;max-width:46ch}
.foot-bottom{border-top:1px solid #16323a;padding-top:22px;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:.82rem;color:#6f9293}

/* ---------------------------------------------------------------- breadcrumb / page head */
.crumb{font-size:.84rem;color:var(--muted);margin-bottom:1.2rem}
.crumb a{color:var(--muted)}.crumb a:hover{color:var(--royal-d)}
.page-head{position:relative;overflow:hidden;background:linear-gradient(180deg,#fff,var(--paper));
  border-bottom:1px solid var(--line);padding:60px 0 48px}
.page-head::after{content:"";position:absolute;inset:0;bottom:auto;height:5px;
  background:linear-gradient(90deg,var(--coral),var(--sun),var(--emerald),var(--royal),var(--sky),var(--cobalt),var(--lavender),var(--berry))}
.page-head .eyebrow{--c:var(--royal)}

/* ---------------------------------------------------------------- prose */
.prose{max-width:760px}
.prose h2{margin-top:2.2rem}
.prose h3{margin-top:1.6rem}
.prose ul{padding-left:1.1rem}
.prose li{margin-bottom:.4rem}
.prose table{width:100%;border-collapse:collapse;margin:1rem 0}
.prose th,.prose td{border:1px solid var(--line);padding:.6rem .7rem;text-align:left;font-size:.94rem}
.prose th{background:var(--paper-2)}

/* ---------------------------------------------------------------- gate modal */
.gate{position:fixed;inset:0;z-index:200;background:rgba(5,18,24,.84);backdrop-filter:blur(7px);
  display:none;align-items:center;justify-content:center;padding:20px}
.gate.open{display:flex}
.gate-card{background:#fff;border-radius:22px;max-width:560px;width:100%;padding:36px;
  box-shadow:var(--shadow-lg);border-top:6px solid var(--royal);position:relative;overflow:hidden}
.gate-card h2{font-size:1.55rem}
.gate-card .gicon{width:58px;height:58px;border-radius:16px;background:var(--royal-l);color:var(--royal-d);
  display:grid;place-items:center;margin-bottom:16px}
.gate-actions{display:flex;gap:12px;margin-top:1.4rem;flex-wrap:wrap}

/* ---------------------------------------------------------------- toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(140%);
  background:var(--ink);color:#fff;padding:.85rem 1.3rem;border-radius:var(--radius-pill);font-weight:600;
  font-size:.92rem;z-index:300;transition:transform .3s cubic-bezier(.2,.9,.3,1);box-shadow:var(--shadow-lg)}
.toast.show{transform:translateX(-50%) translateY(0)}

/* ---------------------------------------------------------------- stats band */
.stats-band{background:
   radial-gradient(600px 300px at 12% -40%,rgba(247,226,163,.55),transparent 60%),
   linear-gradient(120deg,var(--royal-d),var(--royal) 50%,var(--cobalt));color:#fff}
.stats-band .grid{gap:10px}
.stat b{display:block;font-size:2.1rem;font-weight:800;letter-spacing:-.02em}
.stat span{font-size:.86rem;opacity:.9;font-weight:600}

/* ---------------------------------------------------------------- pill / tabs */
.pill{display:inline-block;font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;
  text-transform:uppercase;background:var(--royal-l);color:var(--royal-d);padding:.32rem .65rem;border-radius:var(--radius-pill);font-weight:600}
.pill.c{background:color-mix(in srgb,var(--c) 14%,#fff);color:var(--ct)}
.tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin:1.8rem 0 1.2rem;flex-wrap:wrap}
.tab{border:0;background:none;padding:.7rem 1rem;font:inherit;font-weight:600;color:var(--muted);
  cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--ct);border-bottom-color:var(--c)}
.tabpane{display:none}
.tabpane.active{display:block;animation:fade .3s ease}

/* ---------------------------------------------------------------- learn / articles */
.learn-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;transition:transform .18s,box-shadow .18s}
.learn-card:hover{transform:translateY(-5px);box-shadow:0 24px 46px -24px color-mix(in srgb,var(--c) 55%,transparent)}
.learn-card .lc-top{height:8px;background:var(--c)}
.learn-card .lc-body{padding:22px;display:flex;flex-direction:column;flex:1}
.learn-card .lc-tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--ct);margin-bottom:.4rem;font-weight:600}
.learn-card h3{font-size:1.12rem;margin-bottom:.3rem}
.learn-card p{font-size:.92rem;color:var(--muted);margin:0 0 1rem;flex:1}
.learn-card .lc-read{font-size:.8rem;color:var(--muted)}
.article-head{border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.article-head .bar{height:6px;background:var(--c)}
.refs{list-style:none;padding:0;margin:0;display:grid;gap:.5rem}
.refs li a{display:flex;gap:.5rem;align-items:center;font-size:.92rem}
.refs li a::before{content:"↗";color:var(--ct)}
.disclaimer{border:1px solid var(--warn-line);background:var(--warn-bg);border-radius:14px;
  padding:14px 16px;font-size:.86rem;color:#7a5a1e;margin:1.4rem 0}

/* ---------------------------------------------------------------- faq */
.faq{max-width:760px;margin:0 auto}
.faq details{border:1px solid var(--line);border-radius:14px;background:#fff;margin-bottom:10px;padding:0 20px;
  transition:box-shadow .15s}
.faq details[open]{box-shadow:var(--shadow)}
.faq summary{cursor:pointer;font-weight:700;padding:18px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.5rem;color:var(--royal-d);line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .faq-body{padding:16px 0;color:var(--muted)}

/* ---------------------------------------------------------------- product gallery */
.gallery2{position:sticky;top:96px}
.gmain{position:relative;border:1px solid var(--line);border-radius:22px;overflow:hidden;
  background:radial-gradient(120% 120% at 80% 0%,color-mix(in srgb,var(--c) 26%,#0d2a35),#071821);
  aspect-ratio:1/1;cursor:zoom-in}
.gslide{position:absolute;inset:0;display:none;align-items:center;justify-content:center}
.gslide.active{display:flex}
.gslide svg,.gslide img{width:100%;height:100%;object-fit:contain}
.gslide.paper{background:#fff;padding:18px}
.gmain .zoom-hint{position:absolute;bottom:10px;right:12px;background:rgba(255,255,255,.92);color:var(--ink);
  font-size:.7rem;font-weight:600;padding:.25rem .55rem;border-radius:var(--radius-pill);pointer-events:none}
.gthumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.gthumb{flex:1 1 60px;max-width:96px;aspect-ratio:1/1;border:1.5px solid var(--line);border-radius:13px;overflow:hidden;
  background:var(--ink);cursor:pointer;padding:0;transition:.15s}
.gthumb.paper{background:#fff}
.gthumb.active{border-color:var(--c);box-shadow:0 0 0 2px color-mix(in srgb,var(--c) 30%,#fff)}
.gthumb svg,.gthumb img{width:100%;height:100%;object-fit:contain}
.gthumb.paper svg,.gthumb.paper img{padding:4px}
.lightbox{position:fixed;inset:0;z-index:300;background:rgba(5,18,24,.92);backdrop-filter:blur(4px);
  display:none;align-items:center;justify-content:center;padding:30px;cursor:zoom-out}
.lightbox.open{display:flex}
.lightbox .lb-inner{max-width:90vw;max-height:88vh;background:#fff;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-lg)}
.lightbox .lb-inner.ink{background:var(--ink)}
.lightbox .lb-inner svg,.lightbox .lb-inner img{max-width:90vw;max-height:88vh;display:block}
.lightbox .lb-close{position:absolute;top:18px;right:22px;color:#fff;font-size:2rem;cursor:pointer;line-height:1}

/* ---------------------------------------------------------------- misc */
.divider{height:1px;background:var(--line);border:0;margin:0}
.mol-bond{stroke:#2a5a55;stroke-width:1.6}
.flex-between{display:flex;justify-content:space-between;align-items:end;gap:16px;flex-wrap:wrap}

/* ---------------------------------------------------------------- motion */
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@keyframes dash{to{stroke-dashoffset:-200}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes shine{0%{left:-50%}55%,100%{left:130%}}
@keyframes drift{0%,100%{transform:translate(0,0)}50%{transform:translate(6px,-8px)}}
/* progressive enhancement: only hide when JS is active (html.js) */
html.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
html.js .reveal.in{opacity:1;transform:none}
.reveal[style*="--d"]{transition-delay:var(--d)}

/* ---------------------------------------------------------------- responsive */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-art{max-width:440px}
  .pdetail{grid-template-columns:1fr;gap:30px}
  .cart-wrap{grid-template-columns:1fr}
  .summary{position:static}
  .gallery2{position:static}
  .cols-4{grid-template-columns:repeat(2,1fr)}
  .cols-3{grid-template-columns:repeat(2,1fr)}
  .theme-grid{grid-template-columns:repeat(2,1fr)}
  .news,.inquiry{grid-template-columns:1fr;padding:34px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .timeline{grid-template-columns:repeat(3,1fr);gap:24px 14px}
  .timeline::before{display:none}
}
@media(max-width:680px){
  body{font-size:16px}
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-open .nav-links{display:flex;position:absolute;top:74px;left:0;right:0;flex-direction:column;
    background:var(--white);border-bottom:1px solid var(--line);padding:16px 22px;gap:8px;box-shadow:var(--shadow)}
  .cols-2,.cols-3,.cols-4{grid-template-columns:1fr}
  .theme-grid{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr}
  .section{padding:56px 0}
  .timeline{grid-template-columns:repeat(2,1fr)}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
  html.js .reveal{opacity:1;transform:none}
}