/* Opti Loyer — shared landing / service-page stylesheet (monochrome premium) */
:root{
  --ink:#0a0a0a; --paper:#ffffff; --paper-2:#f6f6f5; --paper-3:#eeeeec;
  --line:#e4e4e1; --line-strong:#cfcfca;
  --gray-1:#6e6e6a; --gray-2:#5c5c58; --gray-3:#2a2a28;
  --radius:12px; --maxw:1180px;
  --font:"Helvetica Neue",Helvetica,"Inter",Arial,system-ui,-apple-system,sans-serif;
  --ease:cubic-bezier(.16,.84,.44,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
h1,h2,h3{margin:0;line-height:1.06;letter-spacing:-.02em;font-weight:800}
p{margin:0}
a{color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:.72rem;font-weight:700;color:var(--gray-1);margin:0 0 18px}
.tnum{font-variant-numeric:tabular-nums}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}.reveal[data-d="2"]{transition-delay:.16s}
.reveal[data-d="3"]{transition-delay:.24s}.reveal[data-d="4"]{transition-delay:.32s}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.5em;cursor:pointer;font:inherit;font-weight:700;font-size:.98rem;padding:15px 26px;border-radius:8px;border:1.5px solid var(--ink);text-decoration:none;transition:.18s ease;white-space:nowrap}
.btn-solid{background:var(--ink);color:#fff}
.btn-solid:hover{background:#000;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn .arw{transition:transform .2s}.btn:hover .arw{transform:translateX(4px)}
.on-dark .btn-solid{background:#fff;color:var(--ink);border-color:#fff}
.on-dark .btn-solid:hover{background:#ededed}
.on-dark .btn-ghost{color:#fff;border-color:rgba(255,255,255,.45)}
.on-dark .btn-ghost:hover{background:#fff;color:var(--ink);border-color:#fff}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.site-header .nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{font-weight:800;font-size:1.3rem;letter-spacing:-.03em;text-decoration:none;color:var(--ink);white-space:nowrap;flex:none}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{text-decoration:none;font-size:.9rem;font-weight:600;color:var(--gray-2);transition:.15s;white-space:nowrap}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--ink)}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:44px;height:44px;align-items:center;justify-content:center;background:transparent;border:0;cursor:pointer;padding:0}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);transition:.25s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-menu{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;padding:8px 24px 20px;box-shadow:0 24px 40px rgba(0,0,0,.10)}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:15px 2px;text-decoration:none;font-weight:600;color:var(--gray-2);border-bottom:1px solid var(--line);font-size:1.05rem}
.mobile-menu a:hover{color:var(--ink)}
.mobile-menu .mm-cta{margin-top:14px;justify-content:center;color:#fff;border-bottom:0}
.mobile-cta{display:none;position:fixed;left:12px;right:12px;bottom:12px;z-index:60;background:var(--ink);color:#fff;text-align:center;text-decoration:none;font-weight:700;padding:15px;font-size:1rem;border-radius:10px;border:1.5px solid rgba(255,255,255,.35);box-shadow:0 8px 28px rgba(0,0,0,.35)}
.mobile-cta.hide{transform:translateY(180%)}
@media(max-width:1080px){.nav-links,.nav-cta{display:none}.nav-toggle{display:flex}.mobile-cta{display:block;transition:transform .3s var(--ease)}body{padding-bottom:60px}}

/* hero */
.lp-hero{background:var(--ink);color:#fff;position:relative;overflow:hidden;padding:96px 0 84px}
.lp-hero::before{content:"";position:absolute;inset:0;opacity:.55;background:radial-gradient(900px 460px at 80% -12%,rgba(255,255,255,.12),transparent 60%);pointer-events:none}
.lp-hero::after{content:"";position:absolute;inset:0;opacity:.05;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);background-size:64px 64px;mask-image:radial-gradient(760px 520px at 18% 0%,#000,transparent 74%)}
.lp-hero .wrap{position:relative;z-index:1;max-width:900px}
.lp-hero .eyebrow{color:rgba(255,255,255,.62)}
.lp-hero .breadcrumb{font-size:.8rem;color:rgba(255,255,255,.5);margin-bottom:18px}
.lp-hero .breadcrumb a{color:rgba(255,255,255,.55);text-decoration:none}
.lp-hero .breadcrumb a:hover{color:#fff}
.lp-hero .breadcrumb span{margin:0 8px;opacity:.5}
.lp-hero h1{font-size:clamp(2.2rem,5.6vw,3.9rem);letter-spacing:-.03em}
.lp-hero .sub{margin-top:22px;font-size:clamp(1.05rem,2.2vw,1.28rem);color:rgba(255,255,255,.82);max-width:640px;font-weight:400;line-height:1.5}
.lp-cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.trust{margin-top:40px;display:flex;gap:24px;flex-wrap:wrap;font-size:.86rem;color:rgba(255,255,255,.7);font-weight:600}
.trust span{display:inline-flex;align-items:center;gap:9px}
.trust span::before{content:"";width:6px;height:6px;border-radius:50%;background:#fff;opacity:.7}

/* sections */
section{padding:88px 0;position:relative}
.on-dark{background:var(--ink);color:#fff}
.alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-head .idx{font-size:.72rem;font-weight:800;letter-spacing:.18em;color:var(--gray-1);margin-bottom:14px;text-transform:uppercase}
.on-dark .sec-head .idx{color:rgba(255,255,255,.5)}
.sec-head h2{font-size:clamp(1.9rem,4.2vw,2.8rem)}
.sec-head p{margin-top:18px;color:var(--gray-2);font-size:1.1rem;line-height:1.6}
.on-dark .sec-head p{color:rgba(255,255,255,.72)}
.prose p{color:var(--gray-2);font-size:1.08rem;line-height:1.7;margin-bottom:20px;max-width:760px}
.on-dark .prose p{color:rgba(255,255,255,.78)}
.prose p b{color:var(--ink)}
.on-dark .prose p b{color:#fff}

/* feature grid */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:820px){.feature-grid{grid-template-columns:1fr}}
.feature{border:1px solid var(--line);border-radius:var(--radius);padding:30px;background:#fff;transition:.22s var(--ease)}
.feature:hover{border-color:var(--ink);transform:translateY(-3px);box-shadow:0 14px 34px rgba(0,0,0,.06)}
.on-dark .feature{background:rgba(255,255,255,.02);border-color:rgba(255,255,255,.16)}
.on-dark .feature:hover{background:rgba(255,255,255,.06)}
.feature .fn{font-size:.8rem;font-weight:800;letter-spacing:.1em;color:var(--gray-1)}
.on-dark .feature .fn{color:rgba(255,255,255,.5)}
.feature h3{font-size:1.28rem;margin:12px 0 10px}
.feature p{color:var(--gray-2);font-size:.98rem;line-height:1.6}
.on-dark .feature p{color:rgba(255,255,255,.74)}

/* steps */
.steps{max-width:840px}
.step{display:grid;grid-template-columns:auto 1fr;gap:26px;padding:0 0 40px;position:relative}
.step:last-child{padding-bottom:0}
.step .sn{width:56px;height:56px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font-weight:800;font-size:1.2rem;flex:none;z-index:1}
.step::before{content:"";position:absolute;left:27px;top:60px;bottom:2px;width:2px;background:var(--line-strong)}
.step:last-child::before{display:none}
.step .sb{padding-top:6px}
.step .sb h3{font-size:1.3rem;margin:0 0 10px}
.step .sb p{color:var(--gray-2);font-size:1.02rem;line-height:1.6}

/* chips / list */
.chips{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.chip{border:1px solid var(--line-strong);border-radius:999px;padding:10px 18px;font-size:.9rem;font-weight:700}
.on-dark .chip{border-color:rgba(255,255,255,.28)}
.ticklist{list-style:none;margin:0;padding:0;max-width:760px}
.ticklist li{padding:14px 0 14px 34px;border-bottom:1px solid var(--line);position:relative;color:var(--gray-2);font-size:1.04rem}
.ticklist li:last-child{border-bottom:0}
.ticklist li b{color:var(--ink)}
.ticklist li::before{content:"";position:absolute;left:0;top:20px;width:16px;height:9px;border-left:2.5px solid var(--ink);border-bottom:2.5px solid var(--ink);transform:rotate(-45deg)}

/* comparison / tables */
.table-scroll{overflow-x:auto}
table.cmp{width:100%;border-collapse:collapse;font-size:1rem;max-width:840px}
table.cmp th,table.cmp td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line)}
table.cmp th{font-weight:700;background:var(--paper-2);font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:var(--gray-2)}
table.cmp td{color:var(--gray-3)}

/* results / cases */
.cas-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.cas-grid{grid-template-columns:1fr}}
.cas{border:1px solid var(--line);border-radius:var(--radius);padding:28px;display:flex;flex-direction:column;gap:16px;background:#fff}
.on-dark .cas{background:rgba(255,255,255,.02);border-color:rgba(255,255,255,.16)}
.cas-tag{align-self:flex-start;font-size:.7rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;background:var(--ink);color:#fff;padding:6px 12px;border-radius:999px}
.on-dark .cas-tag{background:#fff;color:var(--ink)}
.cas .cl span{font-size:.7rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--gray-1)}
.cas .cl b{display:block;font-size:1rem;font-weight:600;color:var(--gray-3);line-height:1.4}
.on-dark .cas .cl b{color:rgba(255,255,255,.85)}
.cas .cm{display:flex;gap:14px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
.on-dark .cas .cm{border-color:rgba(255,255,255,.14)}
.cas .cm div{flex:1}
.cas .cm span{display:block;font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--gray-1);margin-bottom:4px}
.cas .cm b{font-size:1.5rem;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums}

/* FAQ */
.faq-wrap{max-width:820px}
details.faq{border-bottom:1px solid var(--line)}
details.faq:first-of-type{border-top:1px solid var(--line)}
details.faq summary{list-style:none;cursor:pointer;font-weight:700;font-size:1.12rem;color:var(--ink);padding:22px 44px 22px 0;position:relative;letter-spacing:-.01em}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);font-size:1.5rem;font-weight:400;color:var(--gray-1);transition:.2s}
details.faq[open] summary::after{content:"–";color:var(--ink)}
details.faq .faq-answer{padding:0 44px 24px 0;color:var(--gray-2);font-size:1.02rem;line-height:1.7}
details.faq .faq-answer p{margin:0 0 14px}details.faq .faq-answer p:last-child{margin-bottom:0}

/* final CTA band */
.lp-band{background:var(--ink);color:#fff;text-align:center}
.lp-band .wrap{max-width:760px}
.lp-band h2{font-size:clamp(1.9rem,4.4vw,2.9rem)}
.lp-band p{margin:20px auto 30px;color:rgba(255,255,255,.78);font-size:1.14rem;max-width:600px;line-height:1.55}

/* related */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:860px){.related-grid{grid-template-columns:1fr}}
.rel-card{display:block;text-decoration:none;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.22s var(--ease);background:#fff}
.rel-card:hover{border-color:var(--ink);transform:translateY(-3px)}
.rel-card .rc-cat{font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--gray-1)}
.rel-card h3{font-size:1.14rem;letter-spacing:-.01em;margin:10px 0 0;color:var(--ink);line-height:1.25}

/* footer */
.site-footer{background:#000;color:rgba(255,255,255,.6);padding:56px 0 40px;font-size:.9rem}
.site-footer .foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-start}
.site-footer .logo{color:#fff}
.foot-cols{display:flex;gap:56px;flex-wrap:wrap}
.foot-cols h4{font-size:.74rem;text-transform:uppercase;letter-spacing:.14em;color:rgba(255,255,255,.45);margin:0 0 14px;font-weight:700}
.foot-cols a{display:block;color:rgba(255,255,255,.72);text-decoration:none;margin-bottom:9px;font-size:.9rem}
.foot-cols a:hover{color:#fff}
.foot-legal{font-size:.78rem;color:rgba(255,255,255,.4);margin-top:40px;max-width:760px;line-height:1.55;border-top:1px solid rgba(255,255,255,.12);padding-top:24px}

@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* focus-visible (a11y) */
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:3px}
.on-dark :focus-visible,.lp-hero :focus-visible,.site-footer :focus-visible{outline-color:#fff}

/* mini-calc */
.minicalc{display:grid;grid-template-columns:1.05fr 1fr;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;max-width:860px}
@media(max-width:760px){.minicalc{grid-template-columns:1fr}}
.mc-inputs{padding:30px;display:flex;flex-direction:column;gap:16px}
.mc-inputs label{display:block;font-size:.82rem;font-weight:700;color:var(--gray-3)}
.mc-inputs label span{color:var(--gray-1);font-weight:400}
.mc-field{margin-top:7px}
.mc-field input{width:100%;font:inherit;font-weight:700;font-size:1.2rem;font-variant-numeric:tabular-nums;padding:12px 14px;border:1.5px solid var(--line-strong);border-radius:8px;color:var(--ink);background:#fff}
.mc-field input:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 3px rgba(0,0,0,.06)}
.mc-out{background:var(--ink);color:#fff;padding:30px;display:flex;flex-direction:column;justify-content:center;gap:22px}
.mc-out>div{display:flex;flex-direction:column}
.mc-out span{font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:rgba(255,255,255,.6);font-weight:700}
.mc-out b{font-size:clamp(2rem,5vw,2.9rem);font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1.04;margin:4px 0}
.mc-out em{font-style:normal;font-size:.85rem;color:rgba(255,255,255,.6)}
.mc-cta{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.mc-note{margin-top:14px;font-size:.76rem;color:var(--gray-1)}

/* --- dynamic UI --- */
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--ink);z-index:100;transition:width .08s linear;pointer-events:none}
.btn{position:relative;overflow:hidden}
.btn::after{content:"";position:absolute;top:0;left:-45%;width:40%;height:100%;background:linear-gradient(120deg,transparent,rgba(255,255,255,.30),transparent);transform:skewX(-20deg);pointer-events:none;opacity:0}
.btn-solid:hover::after{animation:shineSweep .8s ease}
.on-dark .btn-solid::after,.lp-hero .btn-solid::after,.lp-band .btn-solid::after{background:linear-gradient(120deg,transparent,rgba(0,0,0,.14),transparent)}
@keyframes shineSweep{0%{left:-45%;opacity:1}100%{left:130%;opacity:1}}
.reveal{transform:translateY(28px) scale(.985)}
@media(prefers-reduced-motion:reduce){.scroll-progress{display:none}.btn::after{display:none}.reveal{transform:none}}

/* hero illustration */
.lp-hero .hero-illo{position:absolute;right:3%;bottom:0;width:min(32%,400px);height:auto;opacity:.14;z-index:0;pointer-events:none}
@media(max-width:1000px){.lp-hero .hero-illo{display:none}}

/* logo mark */
.logo{gap:.4em}
.logo::before{content:"";width:1.05em;height:1.05em;flex:none;background:currentColor;-webkit-mask:url(/assets/logo-mark.svg) center/contain no-repeat;mask:url(/assets/logo-mark.svg) center/contain no-repeat}