/* ===== graphic background ===== */
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:linear-gradient(180deg,#fff 0%,#f3f7fd 100%)}
.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;will-change:transform}
.b-a{width:60vmax;height:60vmax;left:-15vmax;top:-20vmax;background:radial-gradient(circle,#3d77cf,transparent 65%);animation:drift1 22s ease-in-out infinite alternate}
.b-b{width:50vmax;height:50vmax;right:-15vmax;top:10vmax;background:radial-gradient(circle,#6f9dff,transparent 65%);animation:drift2 26s ease-in-out infinite alternate}
.b-c{width:55vmax;height:55vmax;left:20vmax;bottom:-30vmax;background:radial-gradient(circle,#1450a9,transparent 65%);opacity:.3;animation:drift1 30s ease-in-out infinite alternate-reverse}
@keyframes drift1{to{transform:translate(12vmax,8vmax) scale(1.15)}}
@keyframes drift2{to{transform:translate(-10vmax,12vmax) scale(.9)}}
.grid{position:absolute;inset:0;background-image:linear-gradient(rgba(20,80,169,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(20,80,169,.07) 1px,transparent 1px);background-size:56px 56px;-webkit-mask-image:radial-gradient(ellipse 85% 75% at 50% 35%,#000 20%,transparent 78%);mask-image:radial-gradient(ellipse 85% 75% at 50% 35%,#000 20%,transparent 78%)}
#net{position:absolute;inset:0;width:100%;height:100%}
@media (prefers-reduced-motion:reduce){.blob{animation:none}}

/* ===== AI chat ===== */
.chat-fab{position:fixed;right:20px;bottom:20px;z-index:70;display:flex;align-items:center;gap:10px;padding:14px 20px 14px 16px;border:0;border-radius:18px;background:var(--brand);color:#fff;font:600 .95rem var(--sans);cursor:pointer;box-shadow:0 18px 36px -14px rgba(20,80,169,.85);transition:.25s}
.chat-fab:hover{transform:translateY(-3px);background:var(--brand-d)}
.chat-fab svg{width:22px;height:22px;fill:none;stroke:#fff;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.chat-fab.hide{opacity:0;pointer-events:none;transform:scale(.8)}
.chat{position:fixed;right:20px;bottom:20px;z-index:80;width:min(400px,calc(100% - 24px));height:min(600px,calc(100% - 40px));display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:0 40px 80px -30px rgba(10,35,82,.65);overflow:hidden;opacity:0;pointer-events:none;transform:translateY(20px) scale(.97);transform-origin:bottom right;transition:.28s}
.chat.open{opacity:1;pointer-events:auto;transform:none}
.chat header{display:flex;align-items:center;gap:12px;padding:16px 18px;background:var(--brand);color:#fff}
.chat header .logo{width:40px;background-image:url(logo-white.png)}
.chat header div{flex:1;display:grid;line-height:1.25}
.chat header small{opacity:.8;font-size:.78rem}
.chat .cx{width:36px;height:36px;border-radius:50%;border:0;background:rgba(255,255,255,.16);color:#fff;font-size:1.4rem;cursor:pointer;line-height:1}
.chat .msgs{flex:1;overflow:auto;padding:18px;display:flex;flex-direction:column;gap:10px;background:var(--tint-2)}
.m{max-width:86%;padding:11px 15px;border-radius:16px;font-size:.93rem;line-height:1.5;white-space:pre-wrap;word-wrap:break-word}
.m.bot{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:5px}
.m.user{align-self:flex-end;background:var(--brand);color:#fff;border-bottom-right-radius:5px}
.m.typing{color:var(--muted);font-style:italic}
.chat .chips{display:flex;flex-wrap:wrap;gap:8px;padding:0 18px 12px;background:var(--tint-2)}
.chat .chips[hidden]{display:none}
.chat .chips button{padding:8px 13px;border-radius:12px;border:1.5px solid var(--line);background:#fff;color:var(--brand);font:600 .82rem var(--sans);cursor:pointer;transition:.2s}
.chat .chips button:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.cin{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line)}
.cin input{flex:1;padding:13px 15px;border-radius:12px;border:1.5px solid var(--line);font:inherit;outline:0}
.cin input:focus{border-color:var(--brand)}
.cin button{padding:0 18px;border:0;border-radius:12px;background:var(--brand);color:#fff;font:600 .9rem var(--sans);cursor:pointer}
.chat footer{display:flex;justify-content:center;align-items:center;gap:10px;padding:8px 14px 12px;color:var(--muted)}
.chat footer small{font-size:.72rem;line-height:1.3}
.chat footer a{flex:none;font-weight:600;font-size:.82rem;color:var(--brand);text-decoration:none}
@media (max-width:640px){
  .chat-fab{bottom:16px;right:14px;padding:13px 16px}
  .chat-fab span{display:none}
  .chat{right:0;left:0;bottom:0;width:100%;height:calc(100% - 60px);border-radius:24px 24px 0 0}
}

/* ===== scroll reveal (reveal.js) ===== */
.rv-ready .rv{opacity:0;transition:opacity .9s cubic-bezier(.2,.7,.2,1) var(--d,0s),transform 1.05s cubic-bezier(.16,.84,.24,1) var(--d,0s),filter .9s ease var(--d,0s)}
.rv-ready .rv[data-rv=up]{transform:translateY(70px)}
.rv-ready .rv[data-rv=left]{transform:translateX(-110px) rotate(-2deg)}
.rv-ready .rv[data-rv=right]{transform:translateX(110px) rotate(2deg)}
.rv-ready .rv[data-rv=zoom]{transform:scale(.82);filter:blur(10px)}
.rv-ready .rv[data-rv=card]{transform:perspective(1000px) translateY(110px) rotateX(32deg) scale(.9);filter:blur(8px);transform-origin:50% 100%}
.rv-ready .rv[data-rv=head]{transform:translateY(30px)}
.rv-ready .rv[data-rv=words]{opacity:1;transform:none}
.rv-ready .rv.rv-on{opacity:1;transform:none;filter:none}
.rv-ready .w{display:inline-block;opacity:0;transform:translateY(.7em) rotate(5deg);filter:blur(6px);transition:opacity .7s ease,transform .8s cubic-bezier(.16,.84,.24,1),filter .7s ease;transition-delay:calc(var(--i) * 70ms + .1s)}
.rv-ready .rv-on .w{opacity:1;transform:none;filter:none}
.hero h1 em .w{background:inherit}

/* flip icon sits top-right, away from the card title */
.front::after{top:20px;bottom:auto;right:20px}
.front h3{padding-right:6px}

/* ===== phone fixes: nothing may stick out sideways, and lighter effects ===== */
html{overflow-x:clip}
main,footer{overflow-x:clip}
@media (max-width:820px),(pointer:coarse){
  .rv-ready .rv[data-rv=left],.rv-ready .rv[data-rv=right]{transform:translateY(60px)}
  .rv-ready .rv[data-rv=card]{transform:translateY(70px) scale(.96);filter:none}
  .rv-ready .rv[data-rv=zoom]{transform:scale(.92);filter:none}
  .rv-ready .w{filter:none}
  .blob{animation:none;filter:blur(60px);opacity:.4}
  .b-c{display:none}
  .nav,.chat-fab{max-width:calc(100vw - 24px)}
}
@media (max-width:640px){
  .flip{min-height:200px}.flip.tall{min-height:240px}
  .face{padding:22px}
  .front svg{width:36px;height:36px}
  .back p{font-size:.97rem}
  .steps{grid-template-columns:1fr 1fr;gap:12px}
  .steps .flip{min-height:170px}
  .steps .face{padding:16px}
  .steps h3{font-size:1.02rem}
  .steps .back p{font-size:.86rem;line-height:1.5}
  .dark .front .num{font-size:1.9rem}
}

/* language switcher UZ | RU | EN */
.lang{display:flex;padding:3px;gap:2px;border:1.5px solid var(--line);border-radius:12px;background:#fff}
.lang button{border:0;background:none;padding:6px 9px;border-radius:9px;font:600 .8rem var(--sans);color:var(--muted);cursor:pointer}
.lang button.on{background:var(--brand);color:#fff}
@media (max-width:400px){.lang button{padding:6px 7px;font-size:.75rem}}
@media (max-width:340px){.brand-text{display:none}}

/* ===== static decoration (3D and moving background were removed for speed) ===== */
.bg{background:radial-gradient(120% 60% at 85% 0%,rgba(61,119,207,.18),transparent 60%),radial-gradient(90% 50% at 0% 40%,rgba(111,157,255,.14),transparent 60%),linear-gradient(180deg,#fff,#f3f7fd)}
.hero-stage{position:relative}
.tag{position:absolute;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px 16px;box-shadow:0 16px 32px -16px rgba(10,35,82,.45);text-align:center;line-height:1.1}
.tag small{display:block;font:700 .66rem var(--sans);letter-spacing:.12em;color:var(--brand)}
.tag b{font:800 1.6rem var(--display);color:var(--navy)}
.tag.t1{left:4%;top:14%;transform:rotate(-6deg)}
.tag.t2{right:2%;top:42%;transform:rotate(5deg)}
.tag.t3{left:8%;bottom:10%;transform:rotate(-3deg);background:var(--brand);border-color:var(--brand)}
.tag.t3 small{color:#c9dbf6}.tag.t3 b{color:#fff}
@media (max-width:820px),(pointer:coarse){
  .nav{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(255,255,255,.97)}
  .tag{padding:8px 12px;border-radius:14px}
  .tag b{font-size:1.25rem}
  .tag.t1{left:2%;top:12%}.tag.t2{right:2%;top:40%}.tag.t3{left:6%;bottom:8%}
}