/* USI Apps — one stylesheet, no framework. */

:root{
  --bg:#07060e;
  --bg-2:#0d0a1a;
  --ink:#eae6f7;
  --ink-2:#a89fc4;
  --ink-3:#6f6890;
  --line:rgba(160,140,255,.14);
  --card:rgba(22,17,42,.55);
  --v1:#8b5cff;   /* violet */
  --v2:#ff6b8a;   /* pink   */
  --v3:#4cc2f2;   /* cyan   */
  --wrap:1160px;
  --r:18px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.65 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  font-synthesis-weight:none;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;height:auto}
a{color:inherit}
h1,h2,h3,h4{line-height:1.15;margin:0;letter-spacing:-.02em;font-weight:650}
p{margin:0 0 1em}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(1.1rem,4vw,2rem)}
.wrap.narrow{max-width:760px}
.muted{color:var(--ink-2)}
.small{font-size:.86rem}
.center{text-align:center}

.skip{position:absolute;left:-9999px;top:0;z-index:100;background:var(--v1);color:#fff;padding:.7rem 1rem;border-radius:0 0 10px 0}
.skip:focus{left:0}
:focus-visible{outline:2px solid var(--v3);outline-offset:3px;border-radius:6px}

/* ---------- background ---------- */
#usi-canvas{position:fixed;inset:0;width:100%;height:100%;z-index:-2;display:block;opacity:0;transition:opacity 1.2s var(--ease)}
#usi-canvas.ready{opacity:1}
.bg-fallback{
  position:fixed;inset:0;z-index:-3;
  background:
    radial-gradient(60vw 50vh at 12% 4%, rgba(139,92,255,.30), transparent 62%),
    radial-gradient(52vw 42vh at 88% 14%, rgba(255,107,138,.20), transparent 60%),
    radial-gradient(70vw 55vh at 50% 100%, rgba(76,194,242,.14), transparent 65%),
    linear-gradient(180deg,var(--bg),var(--bg-2) 40%,var(--bg));
}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(16px);background:rgba(7,6,14,.62);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:1.2rem;height:68px}
.logo{display:flex;align-items:center;gap:.6rem;text-decoration:none;font-weight:700;letter-spacing:-.02em}
.logo-mark{display:grid;grid-template:repeat(2,1fr)/repeat(2,1fr);gap:3px;width:22px;height:22px}
.logo-mark i{border-radius:4px;background:var(--v1);animation:pulse 4s var(--ease) infinite}
.logo-mark i:nth-child(2){background:var(--v2);animation-delay:.3s}
.logo-mark i:nth-child(3){background:var(--v3);animation-delay:.6s}
.logo-mark i:nth-child(4){background:#fff;opacity:.85;animation-delay:.9s}
@keyframes pulse{0%,100%{transform:scale(1);opacity:.9}50%{transform:scale(.72);opacity:.55}}
.logo-text{font-size:1.06rem}
.logo-text em{font-style:normal;color:var(--ink-2);font-weight:500}

.nav-links{margin-left:auto;display:flex;align-items:center;gap:.35rem}
.nav-links a{text-decoration:none;color:var(--ink-2);padding:.5rem .75rem;border-radius:10px;font-size:.94rem;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--ink);background:rgba(255,255,255,.05)}
.nav-links a.on{color:var(--ink)}
.nav-burger{display:none;margin-left:auto;flex-direction:column;gap:5px;padding:.6rem;cursor:pointer}
.nav-burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s var(--ease),opacity .2s}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.72rem 1.2rem;border-radius:999px;border:0;cursor:pointer;
  font:inherit;font-weight:600;font-size:.95rem;text-decoration:none;color:#fff;
  background:linear-gradient(120deg,var(--v1),var(--v2));
  box-shadow:0 8px 30px -10px rgba(139,92,255,.75);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),filter .25s;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 40px -12px rgba(139,92,255,.9);filter:brightness(1.06)}
.btn:active{transform:translateY(0)}
.btn-lg{padding:.95rem 1.7rem;font-size:1rem}
.btn-sm{padding:.5rem .95rem;font-size:.88rem}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink);box-shadow:none}
.btn-ghost:hover{background:rgba(255,255,255,.06);box-shadow:none}

/* ---------- hero ---------- */
.hero{position:relative;padding:clamp(4rem,12vh,8rem) 0 clamp(4rem,10vh,7rem);min-height:min(88vh,860px);display:flex;align-items:center}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:.74rem;color:var(--ink-3);font-weight:600;margin-bottom:1.1rem}
.eyebrow a{color:var(--ink-2)}
.hero h1{font-size:clamp(2.6rem,7.2vw,5rem);margin-bottom:1.3rem}
.grad{background:linear-gradient(100deg,var(--v1) 0%,var(--v2) 45%,var(--v3) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{font-size:clamp(1.03rem,1.9vw,1.22rem);color:var(--ink-2);max-width:64ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:2rem}
.hero-badges{display:flex;flex-wrap:wrap;gap:2rem;list-style:none;padding:0;margin:3rem 0 0;color:var(--ink-3);font-size:.88rem}
.hero-badges b{display:block;font-size:1.7rem;color:var(--ink);font-weight:650;letter-spacing:-.03em}
.scroll-hint{position:absolute;bottom:2rem;left:50%;translate:-50% 0;width:22px;height:34px;border:1.5px solid var(--line);border-radius:12px}
.scroll-hint span{position:absolute;top:7px;left:50%;translate:-50% 0;width:3px;height:6px;border-radius:2px;background:var(--v1);animation:scroll 1.9s var(--ease) infinite}
@keyframes scroll{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(12px)}}

/* ---------- sections ---------- */
.section{padding:clamp(3.5rem,9vh,6.5rem) 0;position:relative}
.section-alt{background:rgba(13,10,26,.55);border-block:1px solid var(--line);backdrop-filter:blur(6px)}
.sec-head{margin-bottom:2.8rem;max-width:60ch}
.sec-head h2{font-size:clamp(1.75rem,3.6vw,2.6rem);margin-bottom:.7rem}
.sec-head p{color:var(--ink-2);margin:0}
.page-head{padding:clamp(3.5rem,10vh,6rem) 0 1rem}
.page-head h1{font-size:clamp(2.2rem,5.5vw,3.8rem);margin-bottom:1rem}
.err{min-height:60vh;display:flex;align-items:center}

/* ---------- app cards ---------- */
.app-grid{display:grid;gap:1.4rem;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.app-card{
  position:relative;isolation:isolate;overflow:hidden;
  padding:2rem 1.8rem 1.6rem;border:1px solid var(--line);border-radius:var(--r);
  background:var(--card);backdrop-filter:blur(14px);
  transition:transform .35s var(--ease),border-color .35s,box-shadow .35s;
}
.app-card:hover{transform:translateY(-6px);border-color:color-mix(in srgb,var(--c1) 45%,transparent);box-shadow:0 28px 60px -30px var(--c1)}
.app-card-glow{position:absolute;inset:-40% 40% 60% -40%;z-index:-1;background:radial-gradient(closest-side,var(--c1),transparent);opacity:.22;transition:opacity .35s}
.app-card:hover .app-card-glow{opacity:.4}
.app-icon{
  width:58px;height:58px;display:grid;place-items:center;font-size:1.7rem;margin-bottom:1.2rem;
  border-radius:16px;background:linear-gradient(140deg,var(--c1),var(--c2));
  box-shadow:0 12px 30px -12px var(--c1);
}
.app-icon-lg{width:88px;height:88px;font-size:2.6rem;border-radius:22px;margin:0}
.app-card h3{font-size:1.4rem;margin-bottom:.35rem}
.app-tag{color:var(--c1);font-weight:600;font-size:.92rem;margin-bottom:.8rem}
.app-sum{color:var(--ink-2);font-size:.95rem}
.app-meta{display:flex;gap:.5rem;flex-wrap:wrap;margin:1.2rem 0 1rem}
.chip{font-size:.75rem;padding:.28rem .7rem;border-radius:999px;border:1px solid var(--line);color:var(--ink-2)}
.chip-live{color:#7ff0c0;border-color:rgba(127,240,192,.28);background:rgba(127,240,192,.07)}
.stretch{text-decoration:none;color:var(--ink);font-weight:600;font-size:.94rem;display:inline-flex;gap:.4rem}
.stretch::after{content:"";position:absolute;inset:0}
.app-card:hover .stretch{color:var(--c1)}

.app-head{--c1:var(--v1);--c2:var(--v2)}
.app-hero{display:flex;gap:1.8rem;align-items:center;flex-wrap:wrap}
.app-hero h1{margin-bottom:.5rem}

/* ---------- value / feature grid ---------- */
.value-grid{display:grid;gap:1.2rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.value{padding:1.7rem;border:1px solid var(--line);border-radius:var(--r);background:var(--card);backdrop-filter:blur(10px);transition:border-color .3s,transform .3s var(--ease)}
.value:hover{border-color:rgba(160,140,255,.35);transform:translateY(-3px)}
.value-ico{font-size:1.6rem;display:block;margin-bottom:.9rem}
.value h3{font-size:1.1rem;margin-bottom:.5rem}
.value p{color:var(--ink-2);font-size:.93rem;margin:0}

/* ---------- steps ---------- */
.steps{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;gap:1.2rem;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.steps li{position:relative;padding:1.8rem 1.6rem;border:1px solid var(--line);border-radius:var(--r);background:var(--card)}
.step-n{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;font-weight:700;font-size:.9rem;background:linear-gradient(120deg,var(--v1),var(--v2));margin-bottom:1rem}
.steps h3{font-size:1.08rem;margin-bottom:.4rem}
.steps p{color:var(--ink-2);font-size:.93rem;margin:0}

/* ---------- cta ---------- */
.cta{padding:clamp(3.5rem,9vh,6rem) 0;text-align:center;border-top:1px solid var(--line);background:radial-gradient(60vw 40vh at 50% 120%,rgba(139,92,255,.22),transparent 70%)}
.cta h2{font-size:clamp(1.7rem,4vw,2.6rem);margin-bottom:.6rem}
.cta p{color:var(--ink-2);margin-bottom:1.8rem}

/* ---------- prose / legal ---------- */
.prose{max-width:78ch}
.prose h2{font-size:1.35rem;margin:2.6rem 0 .8rem;padding-top:.4rem}
.prose h3{font-size:1.06rem;margin:1.8rem 0 .5rem;color:var(--ink)}
.prose p,.prose li{color:var(--ink-2)}
.prose a{color:var(--v3);text-decoration-color:rgba(76,194,242,.4);text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.3rem;margin:0 0 1.2rem}
.prose li{margin-bottom:.5rem}
.prose code{background:rgba(255,255,255,.07);padding:.15em .45em;border-radius:6px;font-size:.9em}
.prose b{color:var(--ink);font-weight:620}
.big{font-size:1.12rem;color:var(--ink) !important;border-left:2px solid var(--v1);padding-left:1.1rem;margin-bottom:2rem}
.warn{border-left:2px solid var(--v2);padding:.9rem 1.1rem;background:rgba(255,107,138,.07);border-radius:0 10px 10px 0}
.notice{border:1px solid var(--line);border-radius:var(--r);padding:1.5rem;background:var(--card)}
.notice h3{font-size:1.05rem;margin-bottom:.6rem}
.notice p{color:var(--ink-2);margin:0;font-size:.94rem}

.table-scroll{overflow-x:auto;margin:0 0 1.4rem;border:1px solid var(--line);border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:.9rem;min-width:520px}
th,td{text-align:left;padding:.75rem .9rem;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink-2)}
th{color:var(--ink);font-weight:600;background:rgba(255,255,255,.03)}
tr:last-child td{border-bottom:0}

.doc-head .doc-dates{display:flex;flex-wrap:wrap;gap:.5rem .75rem;color:var(--ink-3);font-size:.84rem;margin:0}
.doc-dates span+span::before{content:"·";margin-right:.75rem}
.doc-layout{display:grid;gap:3rem;grid-template-columns:230px 1fr;align-items:start}
.doc-nav{position:sticky;top:88px;font-size:.9rem;display:flex;flex-direction:column;gap:.15rem}
.doc-nav h4{font-size:.74rem;text-transform:uppercase;letter-spacing:.14em;color:var(--ink-3);margin-bottom:.6rem}
.doc-nav a{text-decoration:none;color:var(--ink-2);padding:.42rem .6rem;border-radius:8px;border-left:2px solid transparent}
.doc-nav a:hover{background:rgba(255,255,255,.04);color:var(--ink)}
.doc-nav a.on{color:var(--ink);border-left-color:var(--v1);background:rgba(139,92,255,.1)}
.doc-nav p{margin-top:1.5rem}
.legal-prose h2{scroll-margin-top:90px}

.doc-grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.doc-card{
  text-decoration:none;padding:1.6rem;border:1px solid var(--line);border-radius:var(--r);
  background:var(--card);display:flex;flex-direction:column;gap:.45rem;
  transition:transform .3s var(--ease),border-color .3s,background .3s;
}
.doc-card:hover{transform:translateY(-4px);border-color:rgba(160,140,255,.4);background:rgba(30,22,58,.6)}
.doc-ico{font-size:1.5rem}
.doc-card h3{font-size:1.05rem}
.doc-card p{color:var(--ink-2);font-size:.9rem;margin:0;flex:1}
.doc-go{color:var(--v1);font-size:.86rem;font-weight:600;margin-top:.6rem}

/* ---------- faq ---------- */
.faq{border:1px solid var(--line);border-radius:12px;background:var(--card);margin-bottom:.7rem;overflow:hidden}
.faq summary{cursor:pointer;padding:1rem 1.2rem;font-weight:600;font-size:.98rem;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--v1);font-size:1.2rem;line-height:1;transition:transform .25s var(--ease)}
.faq[open] summary::after{transform:rotate(45deg)}
.faq p{padding:0 1.2rem 1.1rem;color:var(--ink-2);font-size:.94rem;margin:0}

/* ---------- deletion form ---------- */
.del-form{display:grid;gap:1.1rem;padding:1.8rem;border:1px solid var(--line);border-radius:var(--r);background:var(--card);margin:1.5rem 0 2.5rem}
.del-form label{display:grid;gap:.4rem;font-size:.9rem;color:var(--ink-2)}
.del-form label>span{font-weight:600;color:var(--ink)}
.del-form input[type=text],.del-form input:not([type]),.del-form select,.del-form textarea{
  font:inherit;font-size:.95rem;color:var(--ink);background:rgba(255,255,255,.04);
  border:1px solid var(--line);border-radius:10px;padding:.7rem .9rem;width:100%;
}
.del-form textarea{resize:vertical}
.del-form select option{background:var(--bg-2);color:var(--ink)}
.del-form .check{grid-template-columns:auto 1fr;align-items:start;gap:.7rem;font-size:.88rem;line-height:1.5}
.del-form .check input{margin-top:.25rem;accent-color:var(--v1);width:18px;height:18px}
.del-form button{justify-self:start}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);background:rgba(7,6,14,.7);backdrop-filter:blur(12px);padding-top:3.5rem}
.foot-grid{display:grid;gap:2.2rem;grid-template-columns:1.6fr repeat(3,1fr);padding-bottom:2.5rem}
.foot-grid h4{font-size:.76rem;text-transform:uppercase;letter-spacing:.14em;color:var(--ink-3);margin-bottom:1rem}
.foot-grid a{display:block;text-decoration:none;color:var(--ink-2);font-size:.92rem;padding:.22rem 0;transition:color .2s}
.foot-grid a:hover{color:var(--ink)}
.foot-brand p{color:var(--ink-2);font-size:.92rem;margin:.7rem 0 0;max-width:34ch}
.foot-base{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem;padding-block:1.3rem;border-top:1px solid var(--line);font-size:.84rem;color:var(--ink-3)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal:nth-child(2){transition-delay:.06s}
.reveal:nth-child(3){transition-delay:.12s}
.reveal:nth-child(4){transition-delay:.18s}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .doc-layout{grid-template-columns:1fr;gap:2rem}
  .doc-nav{position:static;flex-direction:row;flex-wrap:wrap;gap:.35rem}
  .doc-nav h4,.doc-nav p{width:100%}
  .doc-nav a{border-left:0;border:1px solid var(--line);border-radius:999px;font-size:.82rem;padding:.35rem .8rem}
  .doc-nav a.on{border-color:var(--v1)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav-burger{display:flex}
  .nav-links{
    position:fixed;inset:68px 0 auto;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(10,8,20,.97);backdrop-filter:blur(20px);border-bottom:1px solid var(--line);
    padding:1rem 1.2rem 1.6rem;transform:translateY(-120%);transition:transform .35s var(--ease);
  }
  #nav-toggle:checked~.nav-links{transform:none}
  .nav-links a{padding:.85rem .5rem;border-bottom:1px solid var(--line)}
  .nav-links .btn{margin-top:1rem;border-bottom:0}
  .foot-grid{grid-template-columns:1fr}
  .hero-badges{gap:1.4rem}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  #usi-canvas{display:none}
}

@media print{
  .nav,.foot,.doc-nav,#usi-canvas,.bg-fallback,.cta,.skip{display:none !important}
  body{background:#fff;color:#000}
  .prose p,.prose li,td,th{color:#000}
  .doc-layout{grid-template-columns:1fr}
  a{text-decoration:underline}
  a[href^="http"]::after{content:" (" attr(href) ")";font-size:.8em}
}