/* =============================================================
   АКАДЕМИЯ ИИ — общее оформление сайта
   Ночная фиолетовая сцена, неоновая сетка, «игровые» кнопки
   ============================================================= */
:root{
  --night:#120A2B;   /* фон */
  --night-2:#1B0F40;
  --panel:#221649;   /* карточки */
  --panel-hi:#2E1F63;
  --line:rgba(176,150,255,.22);
  --ink:#F7F2FF;
  --mut:#BDB1EA;
  --mint:#4FF0C0; --mint-deep:#18A983;
  --pink:#FF5FC8; --pink-deep:#C2318F;
  --violet:#8B5CFF; --violet-deep:#5B32C9;
  --sun:#FFD24A; --sun-deep:#C99A12;
  --sky:#5CC8FF;
  --coral:#FF6F9F;
  --on-bright:#170C33;
  --holo:linear-gradient(100deg,#FFD24A 0%,#4FF0C0 28%,#5CC8FF 52%,#B07CFF 76%,#FF5FC8 100%);
  --r-lg:28px; --r-md:20px; --r-sm:14px;
  --head:"Russo One","Onest",system-ui,sans-serif;
  --body:"Onest",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  color-scheme:dark;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-behavior:smooth;scroll-padding-top:calc(env(safe-area-inset-top,0px) + 84px);-webkit-text-size-adjust:100%}
body{margin:0;min-height:100%;background:var(--night);color:var(--ink);font:400 17px/1.6 var(--body);overflow-x:hidden}
/* Сцена: свечение сверху и неоновая сетка-«пол» */
body::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(60% 45% at 85% 0%,rgba(139,92,255,.35),transparent 70%),
    radial-gradient(50% 40% at 0% 30%,rgba(255,95,200,.16),transparent 70%),
    linear-gradient(transparent 0 55%,rgba(18,10,43,0) 55%),
    var(--night)}
.floor{position:fixed;left:-50%;right:-50%;bottom:-8vh;height:58vh;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(176,124,255,.28) 1.5px,transparent 1.5px),
    linear-gradient(90deg,rgba(176,124,255,.28) 1.5px,transparent 1.5px);
  background-size:64px 64px;transform:perspective(420px) rotateX(62deg);transform-origin:50% 100%;
  -webkit-mask-image:linear-gradient(transparent,#000 70%);mask-image:linear-gradient(transparent,#000 70%)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:41;background:var(--night)}

h1,h2,h3{font-family:var(--head);font-weight:400;line-height:1.12;margin:0 0 .45em;letter-spacing:.005em}
h1{font-size:clamp(34px,6vw,64px)}
h2{font-size:clamp(28px,4.4vw,44px)}
h3{font-size:20px}
p{margin:0 0 .8em}
a{color:inherit}
img{max-width:100%}
.muted{color:var(--mut)}
:focus-visible{outline:3px solid var(--sun);outline-offset:3px;border-radius:8px}
[hidden]{display:none!important}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:12px;top:-60px;z-index:60;background:var(--sun);color:var(--on-bright);padding:8px 14px;border-radius:10px;font-weight:700}
.skip:focus{top:calc(env(safe-area-inset-top,0px) + 10px)}

/* Неоновый заголовок: белая заливка, золотой контур, фиолетовое свечение */
.neon{color:#fff;text-shadow:0 0 1px var(--sun),0 0 2px var(--sun),0 2px 0 var(--sun-deep),0 5px 0 var(--violet-deep),0 0 28px rgba(176,124,255,.75)}

/* ===== Кнопки-«конфеты» ===== */
.btn{--b:var(--mint);--d:var(--mint-deep);--t:var(--on-bright);
  display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:54px;padding:0 26px;border-radius:999px;
  background:linear-gradient(180deg,rgba(255,255,255,.35),rgba(255,255,255,0) 55%),var(--b);color:var(--t);
  font:700 17px/1.2 var(--body);text-decoration:none;border:0;cursor:pointer;text-align:center;
  box-shadow:0 5px 0 var(--d),0 12px 26px -10px var(--b);transition:transform .12s,box-shadow .12s,filter .12s}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:translateY(4px);box-shadow:0 1px 0 var(--d),0 6px 14px -8px var(--b)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-pink{--b:var(--pink);--d:var(--pink-deep)}
.btn-sun{--b:var(--sun);--d:var(--sun-deep)}
.btn-violet{--b:var(--violet);--d:var(--violet-deep);--t:#fff}
.btn-ghost{background:rgba(139,92,255,.14);color:var(--ink);box-shadow:inset 0 0 0 1.5px rgba(176,150,255,.5)}
.btn-ghost:hover{background:rgba(139,92,255,.26)}
.btn-ghost:active{transform:translateY(2px);box-shadow:inset 0 0 0 1.5px rgba(176,150,255,.5)}
.btn-sm{min-height:42px;padding:0 18px;font-size:15px}
.btn-sm:not(.btn-ghost){box-shadow:0 4px 0 var(--d)}

/* ===== Шапка ===== */
.site-head{position:sticky;top:0;z-index:40;background:rgba(18,10,43,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:22px;height:70px}
.logo{display:flex;align-items:center;gap:12px;text-decoration:none;font:400 19px var(--head);white-space:nowrap}
.logo-mark{width:40px;height:40px;border-radius:13px;background:var(--holo);display:grid;place-items:center;color:var(--on-bright);font:400 16px var(--head);box-shadow:0 0 18px rgba(92,200,255,.45),inset 0 -3px 0 rgba(0,0,0,.18)}
.site-nav{display:flex;gap:24px;margin-left:auto}
.site-nav a{text-decoration:none;color:var(--mut);font-weight:600}
.site-nav a:hover{color:var(--ink)}
.bar-right{display:flex;align-items:center;gap:10px}
.logo + .bar-right{margin-left:auto}
.icon-btn{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:rgba(139,92,255,.16);box-shadow:inset 0 0 0 1.5px var(--line);text-decoration:none}
.icon-btn svg{width:20px;height:20px}
@media (max-width:900px){.site-nav{display:none}.bar-right{margin-left:auto}}
@media (max-width:420px){.logo-text{display:none}}

/* ===== Карточки и мелочи ===== */
.panel{background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,0) 40%),var(--panel);border-radius:var(--r-lg);box-shadow:inset 0 0 0 1.5px var(--line),0 24px 50px -28px rgba(0,0,0,.8)}
.chip{display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;background:rgba(139,92,255,.18);box-shadow:inset 0 0 0 1px var(--line);font-size:14px;font-weight:600;color:var(--ink)}
.chip.mint{background:rgba(79,240,192,.14);color:var(--mint)}
.chip.pink{background:rgba(255,95,200,.14);color:var(--pink)}
.chip.sun{background:rgba(255,210,74,.14);color:var(--sun)}
.xp{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;background:rgba(255,210,74,.14);color:var(--sun);font-weight:700;box-shadow:inset 0 0 0 1.5px rgba(255,210,74,.45)}

/* ===== Подвал и кнопка связи ===== */
.site-foot{border-top:1px solid var(--line);padding:30px 0 96px;color:var(--mut);font-size:15px;background:rgba(18,10,43,.6)}
.foot{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center}
.foot a{text-decoration:none}.foot a:hover{color:var(--ink)}
.float{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:45}

@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}