/* izyexam — motion layer.
   Pure presentation: transitions, hover states, ambient background.
   All JS-driven entrances live in motion.js (GSAP). Nothing here hides content
   by default, so the site stays fully usable if motion.js or GSAP fail to load. */

:root{
  --ease-out:cubic-bezier(.22,1,.36,1);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);
  --glow:color-mix(in srgb,var(--sel) 55%,transparent);
  --shadow-1:0 1px 2px rgba(16,28,56,.04),0 2px 8px rgba(16,28,56,.04);
  --shadow-2:0 2px 4px rgba(16,28,56,.05),0 12px 32px -8px rgba(16,28,56,.16);
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --shadow-1:0 1px 2px rgba(0,0,0,.3);
  --shadow-2:0 2px 4px rgba(0,0,0,.3),0 16px 40px -10px rgba(0,0,0,.6);
}}
:root[data-theme="dark"]{
  --shadow-1:0 1px 2px rgba(0,0,0,.3);
  --shadow-2:0 2px 4px rgba(0,0,0,.3),0 16px 40px -10px rgba(0,0,0,.6);
}

/* ---------- ambient background (parallax layer, driven by motion.js) ---------- */
.bg-fx{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden;contain:strict}
.bg-fx::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:56px 56px;opacity:.35;
  -webkit-mask-image:radial-gradient(ellipse 70% 55% at 50% 0%,#000 0%,transparent 75%);
          mask-image:radial-gradient(ellipse 70% 55% at 50% 0%,#000 0%,transparent 75%)}
.bg-fx i{position:absolute;display:block;border-radius:50%;will-change:transform}
.bg-fx i:nth-child(1){width:62vmax;height:62vmax;left:-18vmax;top:-26vmax;
  background:radial-gradient(closest-side,color-mix(in srgb,var(--sel) 16%,transparent),transparent)}
.bg-fx i:nth-child(2){width:54vmax;height:54vmax;right:-20vmax;top:18vh;
  background:radial-gradient(closest-side,color-mix(in srgb,var(--accent) 13%,transparent),transparent)}
.bg-fx i:nth-child(3){width:40vmax;height:40vmax;left:20vw;bottom:-28vmax;
  background:radial-gradient(closest-side,color-mix(in srgb,var(--ok) 9%,transparent),transparent)}
body.lock .bg-fx{visibility:hidden}

/* ---------- loading state ---------- */
#auth .empty:not(:has(span)){border:0;background:transparent;gap:16px}
#auth .empty:not(:has(span)) b{font-family:var(--f-display);font-weight:500;font-size:15px;letter-spacing:.02em;
  background:linear-gradient(90deg,var(--muted) 0%,var(--fg) 50%,var(--muted) 100%);background-size:200% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;animation:mxShimmer 1.6s linear infinite}
#auth .empty:not(:has(span))::after{content:"";width:120px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent) var(--line);background-size:50% 100%;background-repeat:no-repeat;
  animation:mxBar 1.2s var(--ease-out) infinite}
@keyframes mxShimmer{to{background-position:-200% 0}}
@keyframes mxBar{0%{background-position:-100% 0}100%{background-position:200% 0}}

/* ---------- app bar ---------- */
.top{transition:box-shadow .35s var(--ease-out),background-color .35s}
.top.scrolled{box-shadow:0 8px 28px -12px rgba(5,10,25,.55)}
.logo{display:inline-block}
.logo>span:not(.mx-c){display:inline-block;transition:translate .45s var(--ease-spring),rotate .45s var(--ease-spring)}
a.logo:hover>span{translate:0 -2px;rotate:-3deg}
.nav{position:relative}
.nav a{position:relative;transition:color .25s}
.nav a::before{content:"";position:absolute;left:12px;right:12px;bottom:-3px;height:3px;border-radius:3px 3px 0 0;
  background:var(--ink-muted);opacity:0;transform:scaleX(.4);transition:opacity .25s,transform .35s var(--ease-out)}
.nav a:hover::before{opacity:.35;transform:scaleX(1)}
.nav a.on::before{display:none}
.mx-ind{position:absolute;bottom:0;left:0;height:3px;width:0;border-radius:3px 3px 0 0;background:var(--accent);pointer-events:none;
  box-shadow:0 0 12px color-mix(in srgb,var(--accent) 70%,transparent)}
.nav.has-ind a.on{border-bottom-color:transparent}
.user button{transition:background-color .2s,scale .2s var(--ease-out),border-color .2s}
.user button:active{scale:.96}

/* ---------- buttons ---------- */
/* Hover/press use the individual `translate`/`scale` properties so they compose
   with GSAP, which owns `transform` (entrances, magnetic pull, tilt). */
.btn{position:relative;overflow:hidden;isolation:isolate;
  transition:translate .3s var(--ease-out),scale .3s var(--ease-out),box-shadow .3s var(--ease-out),border-color .2s,background-color .2s,color .2s,filter .2s}
.btn:not(:disabled):hover{translate:0 -1px;box-shadow:var(--shadow-1)}
.btn:not(:disabled):active{translate:0 0;scale:.97;transition-duration:.08s}
.btn.primary:not(:disabled):hover{box-shadow:0 6px 20px -6px var(--glow)}
.btn.primary::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.28) 50%,transparent 70%);
  transform:translateX(-120%);transition:transform .8s var(--ease-out)}
.btn.primary:not(:disabled):hover::after{transform:translateX(120%)}
.btn.mx-mag{will-change:transform}
.btn.danger-t:not(:disabled):hover{border-color:color-mix(in srgb,var(--bad) 50%,var(--line));background:var(--bad-soft)}
.fb,.ib,.tb,.rn-flag,.xbtn,.linkbtn,.strike{transition:background-color .2s,color .2s,scale .2s var(--ease-out),opacity .2s}
.fb:active,.ib:not(:disabled):active,.tb:active,.rn-flag:active,.xbtn:active{scale:.94}
.linkbtn:hover{text-underline-offset:5px}
.linkbtn{transition:text-underline-offset .25s var(--ease-out)}

/* ---------- cards: depth + cursor spotlight ---------- */
.card{position:relative;isolation:isolate;box-shadow:var(--shadow-1);
  transition:box-shadow .45s var(--ease-out),border-color .35s}
.card::before{content:"";position:absolute;inset:-1px;z-index:-1;border-radius:inherit;pointer-events:none;opacity:0;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),color-mix(in srgb,var(--sel) 7%,transparent),transparent 60%);
  transition:opacity .4s}
.card::after{content:"";position:absolute;inset:-1px;border-radius:inherit;pointer-events:none;opacity:0;padding:1px;
  background:radial-gradient(260px circle at var(--mx,50%) var(--my,50%),var(--glow),transparent 65%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;
          mask:linear-gradient(#000 0 0) content-box exclude,linear-gradient(#000 0 0);
  transition:opacity .4s}
@media (hover:hover) and (pointer:fine){
  .card:hover{box-shadow:var(--shadow-2)}
  .card:hover::before,.card:hover::after{opacity:1}
  .grid3>.card,.grid2>.card{will-change:transform}
}
.auth-card{transition:box-shadow .5s var(--ease-out)}
.auth-card .tabs{position:relative}
.auth-card .tabs button{transition:color .25s,border-color .3s}
.auth-card .tabs button:hover{color:var(--fg)}

/* ---------- controls ---------- */
.tg{transition:border-color .25s,background-color .25s,box-shadow .3s var(--ease-out),scale .25s var(--ease-out)}
.tg:hover{border-color:color-mix(in srgb,var(--sel) 45%,var(--line))}
.tg:active{scale:.99}
.tg.on{box-shadow:0 0 0 3px color-mix(in srgb,var(--sel) 12%,transparent)}
.sw::after{box-shadow:0 1px 3px rgba(0,0,0,.25)}
.mode{transition:background-color .25s,border-color .25s,color .25s,translate .25s var(--ease-out),scale .25s var(--ease-out),box-shadow .3s}
.mode:hover:not(.on){border-color:color-mix(in srgb,var(--sel) 45%,var(--line));translate:0 -1px}
.mode:active{scale:.97}
.mode.on{box-shadow:0 4px 14px -6px var(--glow)}
.chk{transition:background-color .2s}
.chip{transition:border-color .25s,translate .25s var(--ease-out)}
.chip:hover{border-color:var(--muted);translate:0 -1px}
.fld input,.fld textarea,.search,.filters select,.cnt input{transition:border-color .2s,box-shadow .25s var(--ease-out)}
.search:focus,.cnt input:focus,.filters select:focus{border-color:var(--sel);outline:none;box-shadow:0 0 0 3px var(--sel-soft)}
table.t td{transition:background-color .2s}
.acc{transition:box-shadow .4s var(--ease-out)}
.acc-ic{position:relative}
.acc:not(.acc-pro) .acc-ic::after{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid var(--accent);opacity:0;animation:mxPing 2.8s var(--ease-out) infinite}
@keyframes mxPing{0%{transform:scale(1);opacity:.6}70%,100%{transform:scale(1.7);opacity:0}}

/* micro-feedback after a re-render (class added by motion.js) */
.tg.mx-hit.on .sw::after{animation:mxSwOn .4s var(--ease-spring)}
.tg.mx-hit:not(.on) .sw::after{animation:mxSwOff .4s var(--ease-spring)}
@keyframes mxSwOn{from{transform:translateX(0)}to{transform:translateX(16px)}}
@keyframes mxSwOff{from{transform:translateX(16px)}to{transform:translateX(0)}}
.mode.mx-hit{animation:mxPop .45s var(--ease-spring)}
@keyframes mxPop{0%{transform:scale(.94)}100%{transform:scale(1)}}

/* ---------- runner ---------- */
.ch{transition:background-color .2s,scale .2s var(--ease-out)}
.ch:not(.rev):active{scale:.995}
.ch .rad{transition:border-color .2s}
.ch.mx-hit.sel .rad::after{animation:mxDot .38s var(--ease-spring)}
@keyframes mxDot{from{transform:scale(0)}to{transform:scale(1)}}
.ch.mx-hit.st .tx{animation:mxFade .3s var(--ease-out)}
@keyframes mxFade{from{opacity:.4}to{opacity:1}}
.rn-flag.mx-hit svg{animation:mxFlag .5s var(--ease-spring)}
@keyframes mxFlag{0%{transform:rotate(-14deg) scale(.8)}100%{transform:none}}
.si{transition:background-color .2s,border-color .25s}
.rn-time.low svg{animation:mxTick 1s ease-in-out infinite}
@keyframes mxTick{50%{transform:scale(1.15)}}
.rn-side{transition:transform .35s var(--ease-out)}
.submit:not(:disabled){box-shadow:0 6px 20px -8px var(--glow)}

/* ---------- toast (keeps [hidden] semantics, adds enter/leave) ---------- */
#toast{display:block;transition:opacity .35s var(--ease-out),transform .45s var(--ease-spring),visibility 0s;
  box-shadow:0 12px 30px -10px rgba(0,0,0,.45)}
#toast[hidden]{display:block!important;opacity:0;visibility:hidden;pointer-events:none;transform:translate(-50%,14px) scale(.96);
  transition:opacity .25s,transform .3s var(--ease-out),visibility 0s .3s}

/* ---------- modal ghost (exit animation layer) ---------- */
.mx-ghost{position:fixed;inset:0;z-index:85;pointer-events:none}
.mx-ghost.rn{z-index:49}
.ov{-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}

/* ---------- split text helpers ---------- */
.mx-w{display:inline-block;overflow:hidden;vertical-align:top;padding-bottom:.12em;margin-bottom:-.12em}
.mx-wi{display:inline-block;will-change:transform}
.mx-c{display:inline-block;will-change:transform}

/* ---------- accessibility / mobile ---------- */
@media (hover:none){
  .btn:not(:disabled):hover,.mode:hover:not(.on),.chip:hover{translate:none}
}
@media (max-width:760px){
  .bg-fx::before{background-size:40px 40px;opacity:.25}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .bg-fx i{transform:none!important}
}