/* Brand OS buy page. Claude Academy house palette (Direction D):
   navy #0D1B2A, off-white #EEF2F6, deep blue #2E6FB5, light blue #7EB8E8 / #A8D4F5,
   coral #E8836A. Oswald 500/600 caps for display, Inter for body.
   Coral is used for the buy button on purpose (Denis's reference look). */
:root{
  --navy:#0d1b2a;--navy-2:#0a1522;--off:#eef2f6;--white:#f3f5f8;
  --blue:#2e6fb5;--blue-2:#245a94;--sky:#7eb8e8;--sky-2:#a8d4f5;
  --coral:#e8836a;--coral-2:#f09a83;--coral-ink:#b5522f;
  --display:"Oswald","Barlow Condensed","Arial Narrow",sans-serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,system-ui,sans-serif;
  --ease:cubic-bezier(.22,1,.36,1);
  /* light surface tokens */
  --bg:var(--off);--ink:#0d1b2a;--ink-2:rgba(13,27,42,.74);--ink-3:rgba(13,27,42,.56);
  --card:#fff;--line:rgba(13,27,42,.1);--grid:rgba(13,27,42,.05);--acc:var(--blue);
  --shadow:0 18px 48px rgba(13,27,42,.1);
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0f1e2f;--ink:#f3f5f8;--ink-2:rgba(243,245,248,.78);--ink-3:rgba(243,245,248,.6);
  --card:rgba(243,245,248,.05);--line:rgba(243,245,248,.14);--grid:rgba(255,255,255,.04);--acc:var(--sky);
  --shadow:0 18px 48px rgba(0,0,0,.35);
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--sans);letter-spacing:-.01em;-webkit-font-smoothing:antialiased}
a{color:var(--acc)}
img{display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 1.5rem}
.narrow{max-width:820px}
.pad{padding:clamp(3.5rem,8vw,6.5rem) 0}
.pt0{padding-top:0}
h1,h2,h3{margin:0}
h2{font:500 clamp(1.9rem,3.6vw,2.9rem)/1.05 var(--display);text-transform:uppercase;letter-spacing:.005em;margin-bottom:2.2rem;max-width:22ch}
h3{font:600 1.05rem/1.3 var(--sans);letter-spacing:-.01em}
.kicker{display:flex;align-items:center;gap:.8rem;margin:0 0 .9rem;font:600 .78rem/1 var(--sans);letter-spacing:.18em;text-transform:uppercase;color:var(--acc)}
.kicker::before{content:"";width:28px;height:1px;background:currentColor}

/* Wordmark: house dot + name, Inter 600 */
.wordmark{display:inline-flex;align-items:baseline;gap:.35rem;font:600 1.05rem/1 var(--sans);color:inherit;text-decoration:none;letter-spacing:-.01em}
.wordmark::before{content:"";align-self:center;width:10px;height:10px;border-radius:50%;background:var(--sky);box-shadow:0 0 18px rgba(126,184,232,.6);margin-right:.25rem}
.wordmark em{font-style:normal;color:var(--sky)}
.wordmark small{font:500 .78rem/1 var(--sans);color:rgba(243,245,248,.6);margin-left:.4rem}
.wordmark.sm{font-size:1rem}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;border-radius:999px;font:700 1rem/1 var(--sans);text-decoration:none;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s}
.btn:hover{transform:translateY(-2px)}
.btn:focus-visible{outline:3px solid var(--sky-2);outline-offset:3px}
.btn-hot{background:var(--coral);color:var(--navy);box-shadow:0 14px 40px rgba(232,131,106,.42),inset 0 1px 0 rgba(255,255,255,.35)}
.btn-hot:hover{background:var(--coral-2);box-shadow:0 18px 50px rgba(232,131,106,.55)}
.btn-lg{padding:1.15rem 2.1rem;font-size:1.08rem}
.btn-sm{padding:.6rem 1.1rem;font-size:.86rem}
.btn-block{width:100%}
.btn-ghost{color:var(--white);border:1px solid rgba(243,245,248,.28);background:rgba(243,245,248,.06);backdrop-filter:blur(8px)}
.btn-ghost:hover{background:rgba(243,245,248,.14)}
.arr{transition:transform .2s var(--ease)}.btn:hover .arr{transform:translateX(4px)}

/* Pills */
.pill{display:inline-flex;align-items:center;gap:.55rem;padding:.5rem 1rem;border-radius:999px;font:500 .9rem/1 var(--sans);color:var(--white);background:rgba(13,27,42,.45);border:1px solid rgba(243,245,248,.22);backdrop-filter:blur(10px)}
.pill-hot{background:var(--coral);border-color:var(--coral);color:var(--navy);font-weight:700}
.pill-who{padding:.3rem 1rem .3rem .3rem}
.pill-who img{width:28px;height:28px;border-radius:50%;object-fit:cover;border:1px solid rgba(243,245,248,.4)}

/* Nav */
.nav{width:100%;display:flex;justify-content:space-between;align-items:center;padding-top:1.4rem;padding-bottom:1.4rem;color:var(--white);position:relative;z-index:2}
.nav-r{display:flex;align-items:center;gap:1rem}
.lang{font:600 .78rem/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:rgba(243,245,248,.75);text-decoration:none;padding:.55rem .9rem;border:1px solid rgba(243,245,248,.2);border-radius:999px}
.lang:hover{color:#fff;border-color:rgba(243,245,248,.45)}

/* Hero: navy stage with a blurred crowd of light (abstract bokeh, no people) */
.hero{position:relative;isolation:isolate;min-height:100vh;min-height:100svh;display:flex;flex-direction:column;background:radial-gradient(120% 90% at 50% 10%,#16304d 0%,#0d1b2a 55%,#08121d 100%);color:var(--white);overflow:hidden}
.bokeh{position:absolute;inset:-10%;z-index:-2;filter:blur(30px) saturate(125%)}
.bokeh i{position:absolute;border-radius:50%;opacity:.9;animation:drift 22s ease-in-out infinite alternate}
.bokeh i:nth-child(1){left:4%;top:18%;width:22vw;height:34vw;background:radial-gradient(closest-side,rgba(126,184,232,.55),transparent)}
.bokeh i:nth-child(2){left:16%;top:52%;width:18vw;height:28vw;background:radial-gradient(closest-side,rgba(168,212,245,.35),transparent);animation-duration:26s}
.bokeh i:nth-child(3){left:72%;top:10%;width:24vw;height:36vw;background:radial-gradient(closest-side,rgba(46,111,181,.6),transparent)}
.bokeh i:nth-child(4){left:82%;top:48%;width:20vw;height:30vw;background:radial-gradient(closest-side,rgba(126,184,232,.4),transparent);animation-duration:30s}
.bokeh i:nth-child(5){left:38%;top:70%;width:30vw;height:22vw;background:radial-gradient(closest-side,rgba(232,131,106,.28),transparent)}
.bokeh i:nth-child(6){left:58%;top:62%;width:16vw;height:24vw;background:radial-gradient(closest-side,rgba(243,245,248,.18),transparent)}
.bokeh i:nth-child(7){left:-4%;top:-6%;width:30vw;height:26vw;background:radial-gradient(closest-side,rgba(46,111,181,.45),transparent)}
.bokeh i:nth-child(8){left:28%;top:4%;width:12vw;height:18vw;background:radial-gradient(closest-side,rgba(243,245,248,.16),transparent);animation-duration:19s}
.bokeh i:nth-child(9){left:62%;top:-4%;width:14vw;height:20vw;background:radial-gradient(closest-side,rgba(168,212,245,.25),transparent)}
.bokeh i:nth-child(10){left:90%;top:20%;width:12vw;height:22vw;background:radial-gradient(closest-side,rgba(232,131,106,.22),transparent);animation-duration:24s}
.bokeh i:nth-child(11){left:8%;top:78%;width:20vw;height:16vw;background:radial-gradient(closest-side,rgba(46,111,181,.5),transparent)}
.bokeh i:nth-child(12){left:74%;top:80%;width:22vw;height:16vw;background:radial-gradient(closest-side,rgba(126,184,232,.3),transparent)}
@keyframes drift{to{transform:translate3d(3vw,-2vw,0) scale(1.08)}}
@media (prefers-reduced-motion:reduce){.bokeh i{animation:none}}
.veil{position:absolute;inset:0;z-index:-1;background:
  radial-gradient(60% 55% at 50% 52%,rgba(8,18,29,.72) 0%,rgba(8,18,29,.25) 60%,transparent 100%),
  linear-gradient(180deg,rgba(8,18,29,.35),transparent 30%,transparent 70%,rgba(8,18,29,.8)),
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.07'/%3E%3C/svg%3E")}
.hero-in{width:100%;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding-top:1rem;padding-bottom:4.5rem}
.eyebrow{margin:0 0 1.4rem;font:600 .8rem/1 var(--sans);letter-spacing:.24em;text-transform:uppercase;color:var(--sky-2);display:flex;align-items:center;gap:.9rem}
.eyebrow::before,.eyebrow::after{content:"";width:34px;height:1px;background:rgba(168,212,245,.6)}
.hero h1{font:600 clamp(4.2rem,13vw,10.5rem)/.9 var(--display);text-transform:uppercase;letter-spacing:-.005em;color:#fff;text-shadow:0 10px 60px rgba(0,0,0,.45)}
.hero h1 .pre{display:block;font:500 clamp(1.05rem,2.1vw,1.6rem)/1.2 var(--sans);text-transform:none;letter-spacing:-.01em;color:rgba(243,245,248,.86);margin-bottom:.9rem;text-shadow:none}
.hero h1 .os{color:var(--sky)}
.lead{max-width:36ch;margin:1.5rem auto 0;font:500 clamp(1.1rem,1.8vw,1.4rem)/1.45 var(--sans);color:rgba(243,245,248,.88)}
.pills{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:.7rem;margin:2.1rem 0 2.3rem;padding:0}
.fine{margin:1rem 0 0;font-size:.86rem;color:rgba(243,245,248,.66)}

/* Navy band: what you get */
.band-navy{background:linear-gradient(180deg,#08121d,#0d1b2a 40%);color:var(--white);position:relative;isolation:isolate}
.band-navy::before{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:240px 240px;mask-image:linear-gradient(180deg,transparent,#000 20%,#000 80%,transparent)}
.band-navy .kicker{color:var(--sky)}
.feats{display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem}
.feat{padding:1.6rem;border-radius:18px;background:rgba(243,245,248,.05);border:1px solid rgba(243,245,248,.13);backdrop-filter:blur(12px);transition:transform .25s var(--ease),border-color .25s}
.feat:hover{transform:translateY(-4px);border-color:rgba(126,184,232,.45)}
.fi{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;margin-bottom:1.1rem;background:rgba(126,184,232,.14);color:var(--sky-2);border:1px solid rgba(126,184,232,.28)}
.fi svg{width:24px;height:24px}
.feat h3{color:#fff;margin-bottom:.45rem}
.feat p{margin:0;font-size:.95rem;color:rgba(243,245,248,.74)}

/* Light bands */
.band-light{background:var(--bg);position:relative;isolation:isolate}
.band-light::before{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:240px 240px}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem;position:relative}
.steps::before{content:"";position:absolute;left:24px;right:24px;top:24px;height:2px;background:linear-gradient(90deg,var(--acc),rgba(46,111,181,.15))}
.steps li{position:relative;padding-right:.5rem}
.sn{display:grid;place-items:center;width:48px;height:48px;border-radius:50%;margin-bottom:1.1rem;background:var(--navy);color:#fff;font:600 1.2rem/1 var(--display);box-shadow:0 0 0 6px var(--bg),var(--shadow);position:relative;border:1px solid rgba(126,184,232,.35)}
.steps li:nth-child(2) .sn::after{content:"48 h";position:absolute;left:56px;top:12px;white-space:nowrap;font:700 .72rem/1 var(--sans);letter-spacing:.06em;padding:.35rem .55rem;border-radius:999px;background:var(--coral);color:var(--navy)}
.steps h3{margin-bottom:.35rem}
.steps p{margin:0;color:var(--ink-2);font-size:.95rem}

.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(1.5rem,4vw,3.5rem);align-items:start}
.price{padding:2.2rem;border-radius:24px;background:radial-gradient(120% 80% at 100% 0%,#1d3a5c 0%,#0d1b2a 60%);color:var(--white);box-shadow:0 30px 70px rgba(13,27,42,.28);border:1px solid rgba(243,245,248,.1)}
.price .kicker{color:var(--sky)}
.amt{display:flex;align-items:baseline;gap:.6rem;margin:.2rem 0 1rem}
.amt .n{font:600 clamp(3.6rem,6vw,4.8rem)/1 var(--display);color:#fff}
.amt .per{font-size:1rem;color:rgba(243,245,248,.7)}
.plist{list-style:none;padding:0;margin:1.4rem 0 1.8rem;display:grid;gap:.75rem}
.plist li{display:flex;gap:.7rem;align-items:flex-start;font-size:.98rem;color:rgba(243,245,248,.9)}
.li-i{flex:none;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:rgba(126,184,232,.18);color:var(--sky-2)}
.li-i svg{width:15px;height:15px}
.plist li.info{color:rgba(243,245,248,.66);font-size:.9rem}
.plist li.info .li-i{background:rgba(243,245,248,.08);color:rgba(243,245,248,.66)}
.price .fine{text-align:center}
.faq h2{margin-bottom:1.4rem}
details{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:1.05rem 1.3rem;margin:0 0 .75rem;box-shadow:0 1px 0 rgba(13,27,42,.02);transition:border-color .2s}
details[open]{border-color:var(--acc)}
summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:1rem}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font:500 1.4rem/1 var(--sans);color:var(--acc);transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{margin:.7rem 0 0;color:var(--ink-2);font-size:.96rem}

/* Footer */
.foot{background:var(--navy-2);color:rgba(243,245,248,.7);padding:2.6rem 0;font-size:.88rem}
.foot-in{display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap;align-items:flex-start}
.foot .wordmark{color:#fff}
.foot-note{max-width:46ch;margin:.7rem 0 0;font-size:.8rem;color:rgba(243,245,248,.5)}
.foot nav{display:flex;flex-wrap:wrap;gap:.4rem 1.4rem}
.foot a{color:rgba(243,245,248,.78);text-decoration:none}.foot a:hover{color:#fff;text-decoration:underline}

/* Legal and 404 pages */
.subbar{background:radial-gradient(120% 140% at 50% 0%,#16304d,#0d1b2a 70%)}
.sub main{padding-top:3rem;padding-bottom:5rem}
.sub h1{font:600 clamp(2.4rem,5vw,3.6rem)/1 var(--display);text-transform:uppercase;margin-bottom:.6rem}
.sub .small{font-size:.86rem;color:var(--ink-3)}
.legal h2{font:600 1.1rem/1.3 var(--sans);text-transform:none;letter-spacing:-.01em;margin:2rem 0 .5rem;max-width:none}
.legal p,.legal li{font-size:.98rem;color:var(--ink-2)}

@media (max-width:980px){.feats,.steps{grid-template-columns:repeat(2,1fr)}.steps::before{display:none}.split{grid-template-columns:1fr}}
@media (max-width:560px){
  .feats,.steps{grid-template-columns:1fr}
  .wordmark small{display:none}
  .eyebrow{letter-spacing:.16em}.eyebrow::before,.eyebrow::after{display:none}
  .nav .btn-sm{display:none}
  .pill{font-size:.82rem;padding:.45rem .85rem}
  .btn-lg{padding:1.05rem 1.5rem;font-size:1rem}
  .price{padding:1.6rem}
}