/* LatexPapa — design system */
*,*::before,*::after{box-sizing:border-box}
:root{
  --bg:#0a0a0b; --bg2:#0f0f11; --panel:#141417; --panel2:#1a1a1e;
  --line:#26262b; --line2:#33333a;
  --ink:#f3f1ee; --ink2:#c9c7c3; --muted:#8b8b93; --muted2:#6a6a72;
  --accent:#d8203f; --accent2:#ff4d6a; --sh:0 0 0 transparent;
  --max:1240px; --gut:24px; --r:14px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.15;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(2.1rem,5vw,3.6rem)} h2{font-size:clamp(1.6rem,3.2vw,2.4rem)} h3{font-size:1.2rem}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.eyebrow{font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:600;margin:0 0 .8em}
.lead{font-size:1.08rem;color:var(--ink2);max-width:62ch}
.muted{color:var(--muted)}
.btn{display:inline-flex;align-items:center;gap:.5em;padding:.85em 1.5em;border-radius:100px;background:var(--accent);color:#fff;font-weight:600;font-size:.94rem;border:1px solid var(--accent);transition:.18s;cursor:pointer}
.btn:hover{background:var(--accent2);border-color:var(--accent2);transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line2)}
.btn.ghost:hover{border-color:var(--ink);background:rgba(255,255,255,.04)}
.btn.block{display:flex;justify-content:center;width:100%}
/* header */
.top{position:sticky;top:0;z-index:50;background:rgba(10,10,11,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:28px;height:68px}
.logo{font-family:var(--serif);font-size:1.32rem;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.logo span{color:var(--accent)}
.nav{display:flex;gap:24px;margin-left:auto;flex-wrap:wrap}
.nav-cta{display:none}
.navbtn{display:none;font:inherit;width:44px;height:44px;margin-left:auto;align-items:center;justify-content:center;background:transparent;border:1px solid var(--line2);border-radius:11px;cursor:pointer;padding:0;flex:none}
.navbtn:hover{border-color:var(--muted)}
.navbtn-box{display:block;width:18px;height:12px;position:relative}
.navbtn-box span{position:absolute;left:0;width:100%;height:2px;background:var(--ink);border-radius:2px;transition:.2s}
.navbtn-box span:nth-child(1){top:0}.navbtn-box span:nth-child(2){top:5px}.navbtn-box span:nth-child(3){top:10px}
.navbtn.on .navbtn-box span:nth-child(1){top:5px;transform:rotate(45deg)}
.navbtn.on .navbtn-box span:nth-child(2){opacity:0}
.navbtn.on .navbtn-box span:nth-child(3){top:5px;transform:rotate(-45deg)}
.nav a{font-size:.9rem;color:var(--ink2);padding:6px 0;border-bottom:1px solid transparent;transition:.15s}
.nav a:hover,.nav a[aria-current]{color:var(--ink);border-bottom-color:var(--accent)}
.top .cta{margin-left:8px}
/* announcement */
.note{background:var(--panel);border-bottom:1px solid var(--line);font-size:.82rem;color:var(--ink2);text-align:center;padding:9px var(--gut)}
.note b{color:var(--ink);font-weight:600}
/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:
  radial-gradient(1100px 460px at 78% -10%,rgba(216,32,63,.20),transparent 60%),
  radial-gradient(760px 380px at 8% 110%,rgba(216,32,63,.09),transparent 62%),var(--bg2)}
.hero .wrap{padding:88px var(--gut) 96px;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero h1{margin-bottom:.35em}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.trust{display:flex;gap:26px;flex-wrap:wrap;margin-top:38px;padding-top:26px;border-top:1px solid var(--line)}
.trust div{font-size:.82rem;color:var(--muted)}
.trust b{display:block;font-family:var(--serif);font-size:1.5rem;color:var(--ink);font-weight:600}
.hero-art{aspect-ratio:4/5;border-radius:var(--r);border:1px solid var(--line);background:linear-gradient(150deg,#1b1b20,#0d0d0f);display:grid;place-items:center;color:var(--muted2);font-size:.8rem;letter-spacing:.1em;text-transform:uppercase}
/* sections */
section{padding:72px 0}
section.tight{padding:52px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;flex-wrap:wrap}
.sec-head p{margin:0;color:var(--muted);max-width:56ch}
/* grid */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)} .g5{grid-template-columns:repeat(5,1fr)}
@media(max-width:980px){.g4,.g5{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.g2,.g3,.g4,.g5{grid-template-columns:repeat(2,1fr)}.hero .wrap{grid-template-columns:1fr;padding:56px var(--gut) 64px}}
@media(max-width:520px){.grid{gap:14px}}
/* card */
.card{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.2s}
.card:hover{border-color:var(--line2);transform:translateY(-3px)}
.card .ph{position:relative;aspect-ratio:1/1;background:linear-gradient(150deg,#1b1b20,#0d0d0f);overflow:hidden}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:.5s}
.card:hover .ph img{transform:scale(1.05)}
.card .ph.empty::after{content:attr(data-label);position:absolute;inset:0;display:grid;place-items:center;color:var(--muted2);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase}
.card .in{padding:14px 15px 17px;display:flex;flex-direction:column;gap:6px;flex:1}
.card .nm{font-size:.93rem;line-height:1.4;font-weight:500}
.card .pr{font-family:var(--serif);font-size:1.05rem;color:var(--ink)}
.card .was{color:var(--muted2);text-decoration:line-through;font-size:.85rem;margin-left:8px}
.card .cat{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted2)}
.badge{position:absolute;top:10px;left:10px;background:rgba(10,10,11,.82);border:1px solid var(--line2);color:var(--ink2);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;padding:4px 9px;border-radius:100px;backdrop-filter:blur(6px)}
/* product page */
.crumbs{font-size:.8rem;color:var(--muted);padding:20px 0}
.crumbs a:hover{color:var(--ink)}
.crumbs span{margin:0 8px;color:var(--muted2)}
.pdp{display:grid;grid-template-columns:1.1fr .9fr;gap:52px;padding-bottom:64px}
@media(max-width:900px){.pdp{grid-template-columns:1fr;gap:30px}}
.gallery{display:grid;gap:12px}
.gallery .main{aspect-ratio:1/1;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#101012}
.gallery .main img{width:100%;height:100%;object-fit:cover}
.thumbs{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.thumbs img{aspect-ratio:1/1;object-fit:cover;border:1px solid var(--line);border-radius:9px;cursor:pointer;opacity:.65;transition:.18s}
.thumbs img:hover,.thumbs img.on{opacity:1;border-color:var(--accent)}
.pdp h1{font-size:clamp(1.7rem,3.4vw,2.5rem)}
.pricebox{display:flex;align-items:baseline;gap:12px;margin:6px 0 18px}
.pricebox .p{font-family:var(--serif);font-size:2rem;color:var(--ink)}
.pricebox .w{color:var(--muted2);text-decoration:line-through}
.pricebox .save{background:rgba(216,32,63,.14);color:var(--accent2);border:1px solid rgba(216,32,63,.3);font-size:.75rem;padding:3px 9px;border-radius:100px;font-weight:600}
.opt{margin:0 0 18px}
.opt .lab{font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:9px}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1px solid var(--line2);background:transparent;color:var(--ink2);padding:8px 15px;border-radius:100px;font-size:.86rem;cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--muted)}
.chip.on,.chip.is-active{background:var(--ink);color:#0a0a0b;border-color:var(--ink);font-weight:600}
.bullets{list-style:none;padding:0;margin:22px 0;border-top:1px solid var(--line)}
.bullets li{padding:11px 0 11px 26px;border-bottom:1px solid var(--line);position:relative;font-size:.92rem;color:var(--ink2)}
.bullets li::before{content:"";position:absolute;left:2px;top:19px;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.spec{display:grid;grid-template-columns:auto 1fr;gap:9px 20px;font-size:.9rem;margin:0}
.spec dt{color:var(--muted)} .spec dd{margin:0;color:var(--ink2)}
.prose{max-width:74ch;color:var(--ink2)}
.prose h2,.prose h3{color:var(--ink);margin-top:1.6em}
.prose ul{padding-left:1.15em} .prose li{margin:.35em 0}
.prose strong{color:var(--ink)}
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;padding:17px 0;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:1.3rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq .ans{padding:0 0 20px;color:var(--ink2);max-width:76ch}
.tiles{display:grid;gap:18px;grid-template-columns:repeat(3,1fr)}
@media(max-width:860px){.tiles{grid-template-columns:1fr}}
.tile{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.tile h3{margin-bottom:.4em} .tile p{color:var(--muted);margin:0;font-size:.92rem}
/* footer */
.foot{border-top:1px solid var(--line);background:var(--bg2);padding:56px 0 34px;margin-top:40px}
.foot .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
@media(max-width:860px){.foot .cols{grid-template-columns:1fr 1fr}}
.foot h4{font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-family:var(--sans);margin-bottom:14px}
.foot ul{list-style:none;padding:0;margin:0;display:grid;gap:9px}
.foot a{font-size:.9rem;color:var(--ink2)} .foot a:hover{color:var(--ink)}
.foot .base{margin-top:40px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.82rem;color:var(--muted2)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}

select.chip,input.chip{appearance:none;-webkit-appearance:none}
select.chip{background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;background-size:5px 5px,5px 5px;background-repeat:no-repeat}

/* mobile nav */
@media(max-width:900px){
  .top .wrap{height:auto;min-height:58px;flex-wrap:wrap;gap:10px;padding:9px 0}
  .top .cta{display:none}
  .navbtn{display:flex}
  .nav{display:none;order:3;flex-basis:100%;margin:0;flex-direction:column;gap:0;padding:2px 0 4px;border-top:1px solid var(--line);max-height:calc(100vh - 150px);overflow-y:auto;overscroll-behavior:contain}
  .nav.open{display:flex}
  .nav a{padding:13px 2px;font-size:1rem;border-bottom:1px solid var(--line);color:var(--ink2)}
  .nav a:last-of-type{border-bottom:0}
  .nav a[aria-current]{color:var(--accent);border-bottom-color:var(--line)}
  .nav-cta{display:block!important;margin:14px 0 6px;text-align:center;background:var(--accent);color:#fff!important;border:1px solid var(--accent)!important;border-radius:100px;padding:13px 18px!important;font-weight:600}
}