/* =========================================================
   soja.ai — sunset / یادنامه‌ی سامانه سوال و جواب
   ========================================================= */

/* ---------- fonts ---------- */
@font-face{
  font-family:'Vazirmatn VF';
  src:url('../fonts/Vazirmatn-var.woff2') format('woff2-variations'),
      url('../fonts/Vazirmatn-var.woff2') format('woff2');
  font-weight:100 900; font-style:normal; font-display:swap;
}
@font-face{font-family:'Vazirmatn';src:url('../fonts/Vazirmatn-Light.woff2') format('woff2');font-weight:300;font-display:swap}
@font-face{font-family:'Vazirmatn';src:url('../fonts/Vazirmatn-Regular.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:'Vazirmatn';src:url('../fonts/Vazirmatn-Medium.woff2') format('woff2');font-weight:500;font-display:swap}
@font-face{font-family:'Vazirmatn';src:url('../fonts/Vazirmatn-SemiBold.woff2') format('woff2');font-weight:600;font-display:swap}
@font-face{font-family:'Vazirmatn';src:url('../fonts/Vazirmatn-Bold.woff2') format('woff2');font-weight:700;font-display:swap}
@font-face{font-family:'Vazirmatn';src:url('../fonts/Vazirmatn-Black.woff2') format('woff2');font-weight:900;font-display:swap}
@font-face{
  font-family:'Inter Variable';
  src:url('../fonts/Inter-var.woff2') format('woff2-variations'),
      url('../fonts/Inter-var.woff2') format('woff2');
  font-weight:100 900; font-style:normal; font-display:swap;
}

/* ---------- tokens ---------- */
:root{
  --ink-0:#05060f;
  --ink-1:#0a0d1c;
  --ink-2:#111527;
  --line:rgba(255,255,255,.09);
  --fg:#e8eef7;
  --fg-dim:#9aa6bd;
  --fg-faint:#6b7793;

  --cyan:#28c2ff;
  --cyan-soft:#7fdcff;
  --violet:#7b5cff;
  --amber:#ff9d43;
  --rose:#ff5f8f;

  --r-sm:14px; --r-md:20px; --r-lg:28px; --r-xl:38px;
  --pad: clamp(20px, 5vw, 64px);
  --maxw: 1180px;

  --ease:cubic-bezier(.22,1,.36,1);
  --mx:50vw; --my:40vh;      /* pointer, set by JS */
  --tx:0; --ty:0;            /* normalised pointer -1..1 */
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:'Vazirmatn VF','Vazirmatn',system-ui,'Segoe UI',sans-serif;
  font-weight:400;
  font-size:clamp(15px,1.02vw + 12px,18px);
  line-height:2;
  color:var(--fg);
  background:var(--ink-0);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
html[lang="en"] body{
  font-family:'Inter Variable',system-ui,'Segoe UI',sans-serif;
  line-height:1.75;
  letter-spacing:-.005em;
}
html[lang="en"] .h2,html[lang="en"] .title{letter-spacing:-.025em;line-height:1.15}
html[lang="en"] .tagline,html[lang="en"] .whisper{font-style:italic}
/* cross-fade while the language swaps */
body.lang-swap main,body.lang-swap .hero__inner,body.lang-swap .footer__in{
  opacity:.12;filter:blur(7px);transition:opacity .22s ease,filter .22s ease;
}
main,.hero__inner,.footer__in{transition:opacity .34s ease,filter .34s ease}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{line-height:1.45;margin:0;font-weight:800;letter-spacing:-.01em}
p{margin:0}
a{color:inherit;text-decoration:none}
::selection{background:rgba(40,194,255,.32);color:#fff}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:fixed;top:-100px;inset-inline-start:16px;z-index:999;background:var(--cyan);color:#04121b;padding:10px 18px;border-radius:0 0 12px 12px;font-weight:700;transition:top .25s}
.skip:focus{top:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:4px;border-radius:8px}

.wrap{width:min(100% - var(--pad)*2, var(--maxw));margin-inline:auto}
.wrap--narrow{width:min(100% - var(--pad)*2, 800px)}

/* =========================================================
   ambient layers
   ========================================================= */
.noise{
  position:fixed;inset:0;z-index:60;pointer-events:none;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.aurora{position:fixed;inset:0;z-index:0;pointer-events:none;filter:blur(90px);opacity:.55}
.aurora span{position:absolute;border-radius:50%;display:block;will-change:transform}
.aurora span:nth-child(1){width:52vw;height:52vw;background:radial-gradient(circle,#1e3a8a,transparent 68%);top:-14vw;inset-inline-end:-10vw;animation:drift 26s var(--ease) infinite alternate}
.aurora span:nth-child(2){width:44vw;height:44vw;background:radial-gradient(circle,#5b21b6,transparent 68%);top:38vh;inset-inline-start:-12vw;animation:drift 34s var(--ease) infinite alternate-reverse}
.aurora span:nth-child(3){width:60vw;height:38vw;background:radial-gradient(ellipse,#7c2d12,transparent 70%);bottom:-16vw;inset-inline-start:20vw;animation:drift 30s var(--ease) infinite alternate}
@keyframes drift{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(6vw,-5vh,0) scale(1.22)}}

#stars{position:fixed;inset:0;z-index:1;pointer-events:none;width:100%;height:100%}

.spotlight{
  position:fixed;inset:0;z-index:2;pointer-events:none;
  background:radial-gradient(420px circle at var(--mx) var(--my),
             rgba(40,194,255,.16), rgba(123,92,255,.07) 42%, transparent 68%);
  transition:opacity .4s;
}
.cursor{
  position:fixed;top:0;left:0;z-index:70;pointer-events:none;
  width:34px;height:34px;margin:-17px 0 0 -17px;
  transform:translate3d(var(--cx,-100px),var(--cy,-100px),0);
  transition:opacity .3s;opacity:0;
}
.cursor i{
  display:block;width:100%;height:100%;border-radius:50%;
  border:1px solid rgba(127,220,255,.65);
  box-shadow:0 0 24px rgba(40,194,255,.45), inset 0 0 12px rgba(40,194,255,.18);
  transition:transform .28s var(--ease), background .28s, border-color .28s;
}
.cursor.is-hot i{transform:scale(1.75);background:rgba(40,194,255,.13);border-color:rgba(255,157,67,.8)}
@media (hover:hover) and (pointer:fine){.cursor{opacity:1}}

.scroll-progress{position:fixed;top:0;inset-inline:0;height:2px;z-index:80;background:rgba(255,255,255,.05)}
.scroll-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--violet),var(--amber));box-shadow:0 0 14px rgba(40,194,255,.65)}

/* =========================================================
   HERO
   ========================================================= */
.hero{
  position:relative;z-index:3;
  min-height:100svh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:clamp(90px,14vh,150px) var(--pad) clamp(70px,12vh,120px);
  text-align:center;overflow:hidden;
}
.sun{
  position:absolute;bottom:-34vmin;left:50%;transform:translateX(-50%);
  width:78vmin;height:78vmin;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle at 50% 42%,
    rgba(255,196,120,.42), rgba(255,110,140,.22) 42%, rgba(123,92,255,.1) 62%, transparent 74%);
  filter:blur(6px);
  animation:sunpulse 9s ease-in-out infinite;
}
@keyframes sunpulse{0%,100%{opacity:.85;transform:translateX(-50%) scale(1)}50%{opacity:1;transform:translateX(-50%) scale(1.05)}}
.horizon{
  position:absolute;bottom:0;inset-inline:0;height:38vh;pointer-events:none;
  background:linear-gradient(to top, var(--ink-0) 8%, rgba(10,13,28,.75) 45%, transparent);
}
.hero__inner{position:relative;z-index:2;max-width:900px;will-change:transform}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.78rem;font-weight:600;letter-spacing:.06em;color:var(--fg-dim);
  padding:8px 18px;border:1px solid var(--line);border-radius:999px;
  background:rgba(255,255,255,.035);backdrop-filter:blur(10px);
  margin-bottom:clamp(22px,4vh,38px);
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--amber);box-shadow:0 0 12px var(--amber);animation:blink 2.4s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}

.logo{margin:0 0 clamp(24px,4vh,40px);display:flex;justify-content:center;transform-style:preserve-3d}
.logo img{
  width:min(440px,78vw);
  filter:drop-shadow(0 0 30px rgba(40,194,255,.45)) drop-shadow(0 10px 34px rgba(0,0,0,.55));
  animation:float 7s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

.title{font-size:clamp(2rem,6.4vw,4.4rem);font-weight:900;line-height:1.3;margin-bottom:clamp(16px,2.5vh,24px)}
.title .line{display:block}
.grad{
  background-image:linear-gradient(100deg,var(--cyan) 0%,var(--cyan-soft) 22%,var(--violet) 48%,var(--rose) 72%,var(--amber) 100%);
  background-size:220% 100%;
  -webkit-background-clip:text;background-clip:text;
  color:transparent;-webkit-text-fill-color:transparent;
  animation:shimmer 7s linear infinite;
}
/* NOTE: use background-image, never the `background` shorthand — it resets background-clip */
.grad--warm{background-image:linear-gradient(100deg,var(--amber),#ffd28a 28%,var(--rose) 56%,var(--cyan) 100%)}
@keyframes shimmer{to{background-position:-220% 0}}

.tagline{
  font-size:clamp(1rem,2.1vw,1.35rem);font-weight:500;color:var(--cyan-soft);
  margin-bottom:clamp(16px,2.5vh,22px);text-shadow:0 0 26px rgba(40,194,255,.4);
}
.lede{max-width:56ch;margin-inline:auto;color:var(--fg-dim);font-size:clamp(.95rem,1.6vw,1.1rem)}
.lede--center{text-align:center;margin-bottom:clamp(26px,4vh,38px)}

.cta{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:clamp(28px,5vh,44px)}
.cta--center{justify-content:center}
.btn{
  position:relative;display:inline-flex;align-items:center;gap:10px;
  padding:14px 30px;border-radius:999px;font-weight:700;font-size:.98rem;
  border:1px solid transparent;isolation:isolate;overflow:hidden;
  transition:transform .3s var(--ease), box-shadow .3s var(--ease), color .3s;
  will-change:transform;
}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .3s var(--ease)}
.btn::before{content:'';position:absolute;inset:0;z-index:-1;transition:opacity .3s,transform .45s var(--ease)}
.btn--primary{color:#04121b}
.btn--primary::before{background:linear-gradient(100deg,var(--cyan),var(--cyan-soft) 55%,#bff0ff)}
.btn--primary:hover{transform:translateY(-3px);box-shadow:0 14px 40px rgba(40,194,255,.4)}
.btn--primary:hover svg{transform:translateY(4px)}
.btn--warm{color:#1a0c04}
.btn--warm::before{background:linear-gradient(100deg,var(--amber),#ffcf8e 55%,var(--rose))}
.btn--warm:hover{transform:translateY(-3px);box-shadow:0 14px 44px rgba(255,157,67,.42)}
.btn--ghost{color:var(--fg);border-color:var(--line);background:rgba(255,255,255,.04);backdrop-filter:blur(10px)}
.btn--ghost:hover{transform:translateY(-3px);border-color:rgba(127,220,255,.55);box-shadow:0 12px 34px rgba(0,0,0,.5)}

.scroll-cue{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;display:flex;flex-direction:column;align-items:center;gap:10px}
.scroll-cue__line{width:1px;height:52px;background:linear-gradient(to bottom,transparent,var(--cyan-soft));position:relative;overflow:hidden}
.scroll-cue__line::after{content:'';position:absolute;inset-inline:0;height:16px;background:#fff;animation:cue 2.1s var(--ease) infinite}
@keyframes cue{0%{top:-16px;opacity:0}30%{opacity:1}100%{top:52px;opacity:0}}
.scroll-cue__txt{font-size:.7rem;color:var(--fg-faint);letter-spacing:.14em}

/* =========================================================
   marquee
   ========================================================= */
.marquee-wrap{position:relative;z-index:3;padding:clamp(40px,7vh,80px) 0;border-block:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.018),transparent)}
.marquee{
  overflow:hidden;display:flex;gap:0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}
.marquee + .marquee{margin-top:14px}
.marquee__track{display:flex;flex-shrink:0;gap:14px;padding-inline-end:14px;animation:scrollx var(--dur,50s) linear infinite;will-change:transform}
.marquee--rev .marquee__track{animation-direction:reverse}
.marquee:hover .marquee__track{animation-play-state:paused}
@keyframes scrollx{to{transform:translateX(50%)}}
.q{
  flex-shrink:0;white-space:nowrap;
  padding:11px 24px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.035);
  color:var(--fg-dim);font-size:.9rem;font-weight:500;
  transition:color .3s,border-color .3s,background .3s,transform .3s var(--ease);
}
.q:hover{color:#fff;border-color:rgba(40,194,255,.5);background:rgba(40,194,255,.1);transform:translateY(-2px)}
.marquee__cap{text-align:center;margin-top:clamp(24px,4vh,38px);color:var(--fg-faint);font-size:.9rem;padding-inline:var(--pad)}

/* =========================================================
   generic sections
   ========================================================= */
.section{position:relative;z-index:3;padding:clamp(64px,11vh,140px) 0}
.section--tight{padding-top:clamp(20px,4vh,50px)}
.kicker{
  display:inline-block;font-size:.76rem;font-weight:700;letter-spacing:.2em;
  color:var(--cyan);margin-bottom:14px;
  padding-inline-start:34px;position:relative;
}
.kicker::before{content:'';position:absolute;inset-inline-start:0;top:50%;width:24px;height:1px;background:linear-gradient(to left,var(--cyan),transparent)}
.kicker--warm{color:var(--amber)}
.kicker--warm::before{background:linear-gradient(to left,var(--amber),transparent)}

.h2{font-size:clamp(1.55rem,4.2vw,2.9rem);font-weight:900;margin-bottom:16px;max-width:20ch}
.h2--xl{font-size:clamp(2rem,6vw,4rem);max-width:none;margin-inline:auto;text-align:center}
.h2 em{font-style:normal;color:var(--cyan-soft)}
.sub{color:var(--fg-dim);max-width:62ch;margin-bottom:clamp(30px,5vh,50px)}

/* ---------- stats ---------- */
.stats{list-style:none;margin:0;padding:0;display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}
.stat{
  position:relative;padding:clamp(22px,3vw,34px);border-radius:var(--r-lg);
  border:1px solid var(--line);background:linear-gradient(150deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  backdrop-filter:blur(14px);overflow:hidden;transform-style:preserve-3d;
  transition:border-color .35s,box-shadow .35s;
}
.stat::after{
  content:'';position:absolute;inset:0;opacity:0;transition:opacity .35s;pointer-events:none;
  background:radial-gradient(240px circle at var(--lx,50%) var(--ly,50%),rgba(40,194,255,.16),transparent 70%);
}
.stat:hover{border-color:rgba(40,194,255,.4);box-shadow:0 22px 60px rgba(0,0,0,.5)}
.stat:hover::after{opacity:1}
.stat b{display:flex;align-items:baseline;justify-content:center;gap:.14em;
  direction:inherit;unicode-bidi:isolate;white-space:nowrap;overflow:hidden;
  font-size:clamp(2.7rem,6.6vw,4.4rem);font-weight:900;line-height:1.24;
  padding-block:.04em;
  background-image:linear-gradient(120deg,#fff,var(--cyan-soft));
  -webkit-background-clip:text;background-clip:text;
  color:transparent;-webkit-text-fill-color:transparent}
.stat b .num{font-size:1em;font-variant-numeric:tabular-nums;direction:ltr;unicode-bidi:isolate}
.stat b .sfx{font-size:.46em;font-weight:800;flex:0 0 auto;align-self:center;letter-spacing:-.01em}
.stat > span{color:var(--fg-dim);font-size:.88rem}

/* ---------- timeline ---------- */
.timeline{list-style:none;margin:0;padding:0;position:relative;padding-inline-start:34px}
.timeline::before{content:'';position:absolute;inset-inline-start:5px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(to bottom,var(--cyan),var(--violet) 45%,var(--amber) 88%,transparent)}
.tl{position:relative;padding-bottom:clamp(28px,4vh,44px)}
.tl::before{
  content:'';position:absolute;inset-inline-start:-34px;top:12px;width:11px;height:11px;border-radius:50%;
  background:var(--ink-0);border:2px solid var(--cyan);
  box-shadow:0 0 0 4px rgba(40,194,255,.12), 0 0 18px rgba(40,194,255,.6);
  transition:transform .35s var(--ease), box-shadow .35s;
}
.tl:hover::before{transform:scale(1.35);box-shadow:0 0 0 7px rgba(40,194,255,.14),0 0 26px rgba(40,194,255,.85)}
.tl--end::before{border-color:var(--amber);box-shadow:0 0 0 4px rgba(255,157,67,.14),0 0 18px rgba(255,157,67,.65)}
.tl__year{display:inline-block;font-size:.86rem;font-weight:700;letter-spacing:.08em;color:var(--cyan-soft);
  padding:3px 14px;border:1px solid rgba(127,220,255,.28);background:rgba(40,194,255,.08);
  border-radius:999px;margin-bottom:8px}
.tl--end .tl__year{color:#ffd0a0;border-color:rgba(255,157,67,.3);background:rgba(255,157,67,.09)}
.tl h3{font-size:clamp(1.05rem,2.4vw,1.4rem);font-weight:700;margin-bottom:6px}
.tl p{color:var(--fg-dim);max-width:62ch;font-size:.95rem}
/* ---------- feature grid ---------- */
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(min(100%,272px),1fr))}
@media (min-width:900px){.grid{grid-template-columns:repeat(3,1fr)}}
.feat{
  position:relative;padding:clamp(24px,3vw,34px);border-radius:var(--r-lg);
  border:1px solid var(--line);background:rgba(255,255,255,.028);
  backdrop-filter:blur(12px);overflow:hidden;transform-style:preserve-3d;
  transition:border-color .35s,background .35s,box-shadow .35s;
}
.feat::after{content:'';position:absolute;inset:0;opacity:0;transition:opacity .35s;pointer-events:none;
  background:radial-gradient(260px circle at var(--lx,50%) var(--ly,50%),rgba(40,194,255,.14),transparent 70%)}
.feat:hover{border-color:rgba(40,194,255,.4);background:rgba(255,255,255,.045);box-shadow:0 24px 64px rgba(0,0,0,.5)}
.feat:hover::after{opacity:1}
.feat__ico{
  display:grid;place-items:center;width:50px;height:50px;border-radius:16px;margin-bottom:18px;
  background:linear-gradient(140deg,rgba(40,194,255,.2),rgba(123,92,255,.14));
  border:1px solid rgba(127,220,255,.24);
  transition:transform .4s var(--ease);
}
.feat:hover .feat__ico{transform:translateZ(28px) rotate(-6deg) scale(1.07)}
.feat__ico svg{width:24px;height:24px;fill:none;stroke:var(--cyan-soft);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.feat h3{font-size:1.08rem;font-weight:700;margin-bottom:8px}
.feat p{color:var(--fg-dim);font-size:.93rem}

/* =========================================================
   rebirth
   ========================================================= */
.rebirth{
  position:relative;z-index:3;text-align:center;overflow:hidden;
  padding:clamp(84px,15vh,180px) 0 clamp(70px,12vh,140px);
  border-top:1px solid var(--line);
}
.rebirth__glow{
  position:absolute;top:-30%;left:50%;transform:translateX(-50%);
  width:min(1100px,150vw);height:min(1100px,150vw);pointer-events:none;
  background:radial-gradient(circle,rgba(255,157,67,.2),rgba(255,95,143,.11) 38%,transparent 66%);
  filter:blur(40px);animation:sunpulse 11s ease-in-out infinite;
}
.rebirth .kicker{padding-inline-start:0}
.rebirth .kicker::before{display:none}
.pills{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:clamp(10px,2vh,18px)}
.pill{
  padding:9px 20px;border-radius:999px;font-size:.85rem;font-weight:600;
  border:1px solid rgba(255,157,67,.28);background:rgba(255,157,67,.07);color:#ffd0a0;
  transition:transform .3s var(--ease),background .3s,box-shadow .3s;
}
.pill:hover{transform:translateY(-3px) scale(1.04);background:rgba(255,157,67,.16);box-shadow:0 10px 30px rgba(255,157,67,.2)}
.whisper{
  margin-top:clamp(34px,6vh,60px);font-size:clamp(.95rem,2vw,1.2rem);font-weight:300;
  color:var(--fg-faint);letter-spacing:.02em;
  animation:breathe 5.5s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:.45}50%{opacity:1;text-shadow:0 0 30px rgba(40,194,255,.35)}}

/* =========================================================
   footer
   ========================================================= */
.footer{position:relative;z-index:3;border-top:1px solid var(--line);padding:clamp(40px,7vh,70px) 0;background:rgba(0,0,0,.35)}
.footer__in{text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}
.footer__logo{width:150px;opacity:.4;margin-bottom:8px;transition:opacity .4s}
.footer__logo:hover{opacity:.85}
.footer p{font-size:.82rem;color:var(--fg-dim);max-width:60ch}
.footer__dim{color:var(--fg-faint) !important;font-size:.76rem !important}
.footer__src{color:var(--fg-faint) !important;font-size:.78rem !important}
.footer__src a{
  color:var(--cyan-soft);text-decoration:none;
  border-bottom:1px solid color-mix(in oklab,var(--cyan-soft) 40%,transparent);
  padding-bottom:1px;transition:color .25s ease,border-color .25s ease;
}
.footer__src a:hover,.footer__src a:focus-visible{color:#fff;border-bottom-color:#fff}

/* =========================================================
   split-flap board (most-viewed questions)
   ========================================================= */
.board{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
@media (min-width:960px){.board{grid-template-columns:repeat(2,1fr)}}

.flap{
  position:relative;overflow:hidden;
  padding:clamp(22px,2.8vw,32px);
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:
    repeating-linear-gradient(180deg,rgba(0,0,0,.26) 0 1px,transparent 1px 13px),
    linear-gradient(155deg,rgba(18,22,40,.95),rgba(8,10,20,.95));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05), 0 20px 54px rgba(0,0,0,.5);
  perspective:900px;
  transition:border-color .35s,box-shadow .35s;
}
.flap::after{
  content:'';position:absolute;inset:0;opacity:0;transition:opacity .35s;pointer-events:none;
  background:radial-gradient(280px circle at var(--lx,50%) var(--ly,50%),rgba(40,194,255,.14),transparent 70%);
}
.flap:hover{border-color:rgba(40,194,255,.42);box-shadow:inset 0 1px 0 rgba(255,255,255,.07),0 26px 66px rgba(0,0,0,.6)}
.flap:hover::after{opacity:1}

/* the hairline where a real split-flap card hinges */
.flap__seam{
  position:absolute;inset-inline:0;top:50%;height:1px;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(0,0,0,.65) 12%,rgba(0,0,0,.65) 88%,transparent);
  box-shadow:0 1px 0 rgba(255,255,255,.045);
}

.flap__face{transform-origin:50% 50%;backface-visibility:hidden}
.flap.is-flipping .flap__face{animation:flapTurn .58s cubic-bezier(.5,0,.2,1)}
@keyframes flapTurn{
  0%  {transform:rotateX(0deg);   opacity:1}
  34% {transform:rotateX(-88deg); opacity:.15}
  36% {transform:rotateX(88deg);  opacity:.15}
  70% {transform:rotateX(-9deg);  opacity:1}
  85% {transform:rotateX(4deg)}
  100%{transform:rotateX(0deg)}
}

.flap__cat{
  display:inline-block;
  font-size:.72rem;font-weight:700;letter-spacing:.06em;
  padding:5px 13px;border-radius:6px;
  color:#ffd0a0;background:rgba(255,157,67,.1);border:1px solid rgba(255,157,67,.26);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;
}

.flap__q{
  display:block;margin:16px 0 0;min-height:5.6em;
  font-size:clamp(1rem,1.75vw,1.16rem);font-weight:600;line-height:1.85;
  color:#fff;
}
html[lang="en"] .flap__q{line-height:1.62;min-height:5.2em}
.flap__q .word{display:inline-block;animation:wordIn .42s var(--ease) both}
@keyframes wordIn{from{opacity:0;transform:translateY(.42em) rotateX(-55deg)}to{opacity:1;transform:none}}

.flap__meta{
  display:flex;align-items:baseline;gap:8px;
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
}
.flap__views{
  font-size:1.02rem;font-weight:700;color:var(--cyan-soft);
  font-variant-numeric:tabular-nums;direction:ltr;unicode-bidi:isolate;letter-spacing:.01em;
}
.flap__unit{font-size:.74rem;color:var(--fg-faint)}

/* digit cells — the only place per-character splitting is safe */
.flap__views .cell{display:inline-block;min-width:.62ch;text-align:center}
.flap__views .cell.is-rolling{color:var(--cyan);text-shadow:0 0 12px rgba(40,194,255,.75)}

.board__note{margin-top:22px;color:var(--fg-faint);font-size:.82rem}

/* ---------- evidence strip ---------- */
.thanks{
  display:grid;gap:14px;
  grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));
  margin-top:clamp(28px,4vh,44px);
}
.thank{
  padding:24px 24px 22px;border-radius:var(--r-md);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:border-color .35s,transform .35s var(--ease),background .35s;
}
.thank:hover{border-color:rgba(40,194,255,.4);background:rgba(40,194,255,.06)}
.thank b{
  display:flex;align-items:baseline;gap:.28em;
  direction:inherit;white-space:nowrap;
  font-size:clamp(1.6rem,3.4vw,2.1rem);font-weight:800;line-height:1.25;
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
  background-image:linear-gradient(120deg,#fff,var(--cyan) 55%,var(--violet));
  -webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent;
}
.thank b .thank__n{direction:ltr;unicode-bidi:isolate}
.thank b .thank__u{
  font-size:.46em;font-weight:700;letter-spacing:0;
  color:var(--cyan-soft);-webkit-text-fill-color:var(--cyan-soft);
}
.thank p{margin-top:8px;font-size:.88rem;line-height:1.85;color:var(--fg-dim)}

/* ---------- pull quote ---------- */
.pull{
  position:relative;text-align:center;max-width:52ch;
  margin:clamp(30px,6vh,64px) auto 0;padding-top:36px;
}
.pull::before{
  content:'”';position:absolute;top:-6px;inset-inline:0;
  font-family:Georgia,serif;font-size:4rem;line-height:1;color:rgba(40,194,255,.26);
}
.pull blockquote{
  margin:0;font-size:clamp(1.02rem,2.2vw,1.38rem);font-weight:500;line-height:1.95;
  color:var(--cyan-soft);
}
.pull figcaption{margin-top:14px;font-size:.78rem;color:var(--fg-faint);line-height:1.8}

/* ---------- language switch ---------- */
.lang{
  position:fixed;z-index:80;top:18px;inset-inline-end:18px;
  display:flex;align-items:center;padding:4px;gap:2px;
  border-radius:999px;border:1px solid rgba(255,255,255,.14);
  background:rgba(10,12,24,.6);backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 10px 30px rgba(0,0,0,.45);
}
.lang__thumb{
  position:absolute;z-index:0;top:4px;bottom:4px;inset-inline-start:4px;
  width:calc(50% - 4px);border-radius:999px;
  background:linear-gradient(120deg,rgba(40,194,255,.9),rgba(123,92,255,.9));
  box-shadow:0 4px 16px rgba(40,194,255,.4);
  transition:transform .42s var(--ease);
}
body.is-en .lang__thumb{transform:translateX(100%)}
html[dir="rtl"] body.is-en .lang__thumb{transform:translateX(-100%)}
.lang__btn{
  position:relative;z-index:1;appearance:none;border:0;background:none;cursor:pointer;
  padding:7px 16px;min-width:64px;border-radius:999px;
  font:inherit;font-size:.78rem;font-weight:700;letter-spacing:.02em;
  color:var(--fg-dim);transition:color .3s;
}
.lang__btn:hover{color:#fff}
.lang__btn.is-on{color:#04121b}
.lang__btn[lang="fa"]{font-family:'Vazirmatn VF','Vazirmatn',sans-serif}
.lang__btn[lang="en"]{font-family:'Inter Variable',system-ui,sans-serif}
@media (max-width:520px){
  .lang{top:12px;inset-inline-end:12px}
  .lang__btn{min-width:52px;padding:6px 12px;font-size:.72rem}
}

.reveal{opacity:0;transform:translateY(26px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* =========================================================
   responsive
   ========================================================= */
@media (max-width:720px){
  body{line-height:1.9}
  .hero{min-height:92svh}
  .cta{flex-direction:column;align-items:stretch}
  .btn{justify-content:center}
  .h2{max-width:none}
  .timeline{padding-inline-start:26px}
  .tl::before{inset-inline-start:-26px}
  .stat b{font-size:3rem}
  .scroll-cue{display:none}
}
@media (max-width:400px){
  .q{font-size:.8rem;padding:9px 16px}
}
@media (hover:none){
  .spotlight{display:none}
  .cursor{display:none}
}

/* =========================================================
   accessibility
   ========================================================= */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
  .aurora,.spotlight,.cursor{display:none}
  .marquee__track{animation:none;flex-wrap:wrap;justify-content:center;white-space:normal}
  .marquee{-webkit-mask-image:none;mask-image:none}
  .flap__q .word{animation:none}
  .flap.is-flipping .flap__face{animation:none}
  .flap__face{transition:opacity .001ms}
}