/* ============ Fonts ============ */
@font-face{font-family:"IRANSansX";src:url("../assets/fonts/IRANSansX-Light.woff2") format("woff2");font-weight:300;font-display:swap}
@font-face{font-family:"IRANSansX";src:url("../assets/fonts/IRANSansX-Regular.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"IRANSansX";src:url("../assets/fonts/IRANSansX-Medium.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"IRANSansX";src:url("../assets/fonts/IRANSansX-DemiBold.woff2") format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"IRANSansX";src:url("../assets/fonts/IRANSansX-Bold.woff2") format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"IRANSansX";src:url("../assets/fonts/IRANSansX-ExtraBold.woff2") format("woff2");font-weight:800;font-display:swap}
@font-face{font-family:"IRANSansX";src:url("../assets/fonts/IRANSansX-Black.woff2") format("woff2");font-weight:900;font-display:swap}

/* ============ Brand palette ============
   Light blue ~50% · Cream white ~35% · Navy ~15%  */
:root{
  --blue:#4A90D9;        /* light blue (logo) - dominant */
  --blue-2:#6FA8E4;      /* lighter tint for gradients */
  --blue-3:#A9CCF0;      /* pale tint */
  --blue-deep:#3A7BC4;   /* darker tint for depth */
  --cream:#F8F4EC;       /* cream white */
  --cream-2:#EFE8DA;     /* cream border/shade */
  --navy:#1B4580;        /* navy - accents, text, footer */
  --navy-deep:#14335F;
  --white:#FFFFFF;
  --ink:#1B2F4D;         /* body text on cream (navy-based) */
  --muted:#5E6F87;

  --radius:24px;
  --shadow:0 24px 50px -24px rgba(27,69,128,.45);
  --ease:cubic-bezier(.2,.7,.2,1);
  --marquee-h:38px;
  --nav-h:70px;
  --header-h:calc(var(--marquee-h) + var(--nav-h));
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-h)}
body{font-family:"IRANSansX",Tahoma,sans-serif;color:var(--ink);background:var(--blue);line-height:1.9;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul{list-style:none}
.container{width:min(1200px,calc(100% - 40px));margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.latin{direction:ltr}
:focus-visible{outline:2px solid var(--cream);outline-offset:3px;border-radius:6px}

/* ============ Background video ============ */
.bg-video{position:fixed;inset:0;z-index:-1;overflow:hidden;background:var(--navy)}
.bg-video video{width:100%;height:100%;object-fit:cover;object-position:50% 55%}
.bg-video__shade{position:absolute;inset:0;background:
  linear-gradient(180deg,rgba(27,69,128,.45) 0%,rgba(27,69,128,0) 28%,rgba(27,69,128,0) 70%,rgba(27,69,128,.45) 100%)}

/* ============ Buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:999px;font-weight:700;font-size:15px;transition:transform .3s var(--ease),background .3s,color .3s,box-shadow .3s}
.btn:hover{transform:translateY(-2px)}
.btn--ghost{border:1.5px solid rgba(255,255,255,.7);color:var(--white);padding:8px 20px;font-size:14px}
.btn--ghost:hover{background:var(--cream);color:var(--navy);border-color:var(--cream)}
.btn--cream{background:var(--cream);color:var(--navy)}
.btn--cream:hover{box-shadow:0 12px 30px -12px rgba(20,51,95,.6)}
.btn--blue{background:var(--blue);color:var(--white)}
.btn--blue:hover{background:var(--navy);box-shadow:0 12px 30px -12px rgba(20,51,95,.6)}

/* ============ Fixed top: marquee + header ============ */
.site-top{position:fixed;inset:0 0 auto;z-index:50}
.marquee{height:var(--marquee-h);background:var(--white);color:var(--blue);overflow:hidden;display:flex;align-items:center;border-bottom:1px solid rgba(74,144,217,.18)}
.marquee__track{display:flex;width:max-content;animation:marquee 38s linear infinite}
.marquee:hover .marquee__track{animation-play-state:paused}
.marquee__group{display:flex;flex-shrink:0}
.marquee__group li{display:flex;align-items:center;gap:46px;padding-inline-end:46px;font-size:13.5px;font-weight:700;white-space:nowrap}
.marquee__group li::after{content:"";width:16px;height:16px;flex-shrink:0;background:var(--blue);
  -webkit-mask:url("../assets/logo-mark.svg") center/contain no-repeat;mask:url("../assets/logo-mark.svg") center/contain no-repeat}
/* RTL: content enters from the left and travels right */
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(50%)}}

.header{height:var(--nav-h);transition:background .4s,box-shadow .4s}
.site-top.is-scrolled .header{background:rgba(74,144,217,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 10px 30px -18px rgba(20,51,95,.6)}
.header__inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;color:var(--white);direction:ltr}
.brand__mark{height:42px;width:auto;filter:brightness(0) invert(1)}
.brand__text{display:flex;flex-direction:column;align-items:flex-start;line-height:1.05;text-align:left}
.brand__en{direction:ltr;font-weight:800;font-size:22px;letter-spacing:.06em;white-space:nowrap}
.brand__sub{direction:ltr;font-weight:500;font-size:13px;letter-spacing:.14em;white-space:nowrap;opacity:.92;margin-top:3px}
.nav{display:flex;align-items:center;gap:4px}
.nav__link{color:rgba(255,255,255,.9);font-size:14px;font-weight:500;padding:8px 12px;border-radius:999px;transition:background .25s,color .25s;white-space:nowrap}
.nav__link:hover,.nav__link.is-active{color:var(--white);background:rgba(255,255,255,.16)}
.nav__login{margin-inline-start:10px}
.burger{display:none;width:44px;height:44px;border-radius:12px;position:relative}
.burger span{position:absolute;inset-inline:11px;height:2px;background:var(--white);border-radius:2px;transition:transform .3s var(--ease),opacity .3s}
.burger span:nth-child(1){top:15px}.burger span:nth-child(2){top:21px}.burger span:nth-child(3){top:27px}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ============ Hero: logo only, centred ============ */
.preloader__bubbles{position:absolute;inset:0}
.hero{min-height:100vh;min-height:100svh;position:relative;display:grid;place-items:center;padding-top:var(--header-h)}
.hero__inner{display:grid;place-items:center}
.hero__mark{height:clamp(170px,30vh,300px);width:auto;filter:brightness(0) invert(1) drop-shadow(0 12px 40px rgba(20,51,95,.55));animation:floaty 6s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

.scroll-cue{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);width:26px;height:44px;border:1.5px solid rgba(255,255,255,.7);border-radius:20px}
.scroll-cue__line{position:absolute;top:8px;left:50%;width:2px;height:9px;margin-left:-1px;background:var(--white);border-radius:2px;animation:cue 2s var(--ease) infinite}
@keyframes cue{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(16px)}}

.video-controls{position:fixed;bottom:20px;left:20px;z-index:45;display:flex;gap:10px;direction:rtl}
.video-toggle{position:relative;width:42px;height:42px;border-radius:50%;background:rgba(20,51,95,.72);border:1px solid rgba(255,255,255,.4);box-shadow:0 8px 22px -10px rgba(20,51,95,.7);backdrop-filter:blur(8px);display:grid;place-items:center;transition:background .25s}
.video-toggle:hover{background:rgba(20,51,95,.9)}
.video-toggle svg{width:16px;height:16px;fill:var(--white)}
.video-toggle .i-play{display:none}
.video-toggle.is-paused .i-play{display:block}
.video-toggle.is-paused .i-pause{display:none}
.sound-toggle{width:auto;padding:0 16px 0 14px;border-radius:999px;gap:8px;display:flex;align-items:center;font-size:13px;font-weight:600;color:var(--white)}
.sound-toggle .i-on{display:none}
.sound-toggle.is-on .i-on{display:block}
.sound-toggle.is-on .i-off{display:none}
.sound-toggle:not(.is-on){animation:soundHint 2.4s var(--ease) infinite}
@keyframes soundHint{0%,100%{box-shadow:0 0 0 0 rgba(248,244,236,.55)}50%{box-shadow:0 0 0 8px rgba(248,244,236,0)}}
.sound-toggle svg{fill:none;stroke:var(--white);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ============ Stats (light blue) ============ */
.stats{background:linear-gradient(90deg,var(--blue),var(--blue-deep));color:var(--white)}
.stats__grid{display:grid;grid-template-columns:repeat(3,1fr);padding:46px 0}
.stat{text-align:center;padding:6px 10px}
.stat + .stat{border-inline-start:1px solid rgba(255,255,255,.25)}
.stat__num{display:block;font-size:clamp(40px,5vw,60px);font-weight:800;line-height:1.1}
.stat__num::after{content:"+";color:var(--cream);opacity:.8;font-weight:600;margin-inline-start:2px}
.stat__label{font-size:14px;color:rgba(255,255,255,.88)}

/* ============ Shared section styles ============ */
.section{padding:clamp(70px,10vw,120px) 0;position:relative}
.eyebrow{color:var(--blue);font-weight:700;font-size:13px;letter-spacing:.06em;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:26px;height:2px;background:currentColor;border-radius:2px}
.eyebrow--light{color:var(--cream)}
.h2{font-size:clamp(28px,3.6vw,42px);font-weight:800;color:var(--navy);line-height:1.35}
.h2--light{color:var(--white)}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px}

/* About (cream) */
.about{background:var(--cream)}
.about__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(40px,6vw,90px);align-items:center}
.about__text p:not(.eyebrow){color:var(--muted);margin-top:16px;font-size:16px;text-align:justify}
.about__media{position:relative;aspect-ratio:4/5;max-width:460px;justify-self:center;width:100%}
.about__media img:first-child{width:78%;height:88%;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow);margin-inline-start:auto}
.about__media-2{position:absolute;width:52%;height:46%;object-fit:cover;border-radius:var(--radius);bottom:0;inset-inline-start:0;border:6px solid var(--cream);box-shadow:var(--shadow)}
.about__mark{position:absolute;top:-18px;inset-inline-start:6%;height:110px;width:auto}

/* ============ Courses: Woshe-style photo mosaic ============ */
.collections-sec{background:var(--white)}
.container-wide{width:min(1560px,calc(100% - 40px));margin-inline:auto}
.collections{display:grid;grid-template-columns:1fr 1fr;gap:clamp(16px,2vw,30px)}
.tile{position:relative;display:block;overflow:hidden;background:var(--blue-2);border-radius:var(--radius);isolation:isolate;box-shadow:0 22px 44px -26px rgba(20,51,95,.55);aspect-ratio:16/10.4;color:var(--white);container-type:inline-size}
.tile--banner{grid-column:1/-1;aspect-ratio:16/5.4}
.tile--tall{grid-row:span 2;aspect-ratio:auto}
.tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 1.4s var(--ease)}
.tile:hover img{transform:scale(1.05)}
.tile::after{content:"";position:absolute;inset:0;background:linear-gradient(270deg,rgba(7,26,51,.62) 0%,rgba(7,26,51,.25) 45%,rgba(7,26,51,0) 70%);pointer-events:none}
.tile__text{position:absolute;z-index:2;top:11%;inset-inline-start:7%;max-width:62%;text-align:right;display:flex;flex-direction:column;align-items:flex-start}
.tile__fa{order:1}.tile__en{order:2}.tile__desc{order:3}.tile__brand{order:4}
.tile__en{direction:ltr;text-align:right;font-weight:600;font-size:clamp(13px,3.2cqi,22px);line-height:1.2;letter-spacing:.1em;margin-top:6px;text-shadow:0 4px 30px rgba(7,26,51,.4)}
.tile--banner .tile__en{font-size:clamp(14px,2.6cqi,26px)}
.tile--banner .tile__fa{font-size:clamp(24px,3.4cqi,38px)}
.tile__desc{direction:ltr;text-align:right;font-size:12px;line-height:1.6;opacity:.85;margin:12px 0 16px;max-width:360px}
.tile__fa{font-size:clamp(20px,5.4cqi,34px);font-weight:700;line-height:1.35;text-shadow:0 4px 24px rgba(7,26,51,.45)}
.tile__brand{direction:ltr;text-align:right;font-size:10.5px;letter-spacing:.6em;opacity:.8;margin-top:6px}
@media (max-width:760px){.collections{grid-template-columns:1fr 1fr;gap:12px}.tile{border-radius:16px}.tile--banner{grid-column:1/-1;aspect-ratio:16/10}.tile--wide,.tile--tall,.tile--half{grid-column:auto;grid-row:auto;aspect-ratio:4/5}.tile:nth-child(4){grid-column:1/-1;aspect-ratio:16/10}.tile__text{top:9%;inset-inline-start:8%;max-width:86%}.tile__en{font-size:clamp(10px,5.2cqi,14px);margin-top:4px;letter-spacing:.08em}.tile--banner .tile__en,.tile:nth-child(4) .tile__en{font-size:clamp(11px,3.6cqi,16px)}.tile--banner .tile__fa,.tile:nth-child(4) .tile__fa{font-size:clamp(18px,6cqi,26px)}.tile__desc{display:none}.tile__fa{font-size:clamp(15px,8.5cqi,21px)}.tile__brand{font-size:8px;letter-spacing:.4em}}

/* Window (video shows again) */
.window{padding:clamp(110px,18vw,200px) 0;text-align:center;color:var(--white)}
.window__quote{direction:ltr;font-size:clamp(22px,3.6vw,44px);font-weight:300;letter-spacing:.14em;text-transform:uppercase;line-height:1.5;text-shadow:0 4px 30px rgba(20,51,95,.6)}
.window__fa{margin-top:14px;color:var(--cream);font-size:clamp(14px,1.6vw,18px)}

/* Partner systems (white) - one swipeable row of light-blue logos, no cards */
.systems{background:var(--white)}
.section__head--center{justify-content:center;text-align:center}
.section__head--center .eyebrow{justify-content:center}
.partners{display:flex;flex-wrap:nowrap;align-items:center;justify-content:safe center;gap:clamp(36px,6vw,80px);overflow-x:auto;overscroll-behavior-x:contain;scroll-snap-type:x mandatory;scrollbar-width:none;-webkit-overflow-scrolling:touch;padding:14px 24px 24px;-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 6%,#000 94%,transparent 100%);mask-image:linear-gradient(90deg,transparent 0,#000 6%,#000 94%,transparent 100%)}
.partners::-webkit-scrollbar{display:none}
.partner{flex:0 0 auto;display:flex;align-items:center;justify-content:center;height:120px;scroll-snap-align:center}
.partner__mark{display:block;background:var(--blue);-webkit-mask:var(--m) center/contain no-repeat;mask:var(--m) center/contain no-repeat;transition:transform .45s var(--ease),background .45s}
.partner:hover .partner__mark{transform:scale(1.06);background:var(--navy)}
.partner__mark--dan{--m:url("../assets/partners/mask-dan.svg");width:160px;aspect-ratio:230/48}
.partner__mark--rstc{--m:url("../assets/partners/mask-rstc.png");width:170px;aspect-ratio:731/240}
.partner__mark--cmas{--m:url("../assets/partners/mask-cmas.svg");height:96px;aspect-ratio:187/240}
.partner__mark--iantd{--m:url("../assets/partners/mask-iantd.png");height:96px;aspect-ratio:220/240}
.partner__mark--mapa{--m:url("../assets/partners/mask-mapa.png");height:100px;aspect-ratio:241/240}

/* Tools (white) */
.tools{background:var(--white);color:var(--ink);overflow:hidden;padding-bottom:clamp(110px,14vw,160px)}
.tools::before{content:"";position:absolute;inset-inline-end:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(169,204,240,.35),transparent 70%)}
.tools__inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.tools__inner p:not(.eyebrow){max-width:560px;margin-top:10px}

/* ============ Footer (light blue) with waves ============ */
.footer{position:relative;background:var(--blue);color:rgba(255,255,255,.88);padding:40px 0 26px;font-size:14px}
.footer__waves{position:absolute;bottom:100%;left:0;width:100%;height:clamp(60px,9vw,120px);margin-bottom:-1px;display:block}
.footer__parallax use{animation:waveMove 25s cubic-bezier(.55,.5,.45,.5) infinite}
.footer__parallax use:nth-child(1){animation-delay:-2s;animation-duration:7s;fill:rgba(169,204,240,.55)}
.footer__parallax use:nth-child(2){animation-delay:-3s;animation-duration:10s;fill:rgba(74,144,217,.3)}
.footer__parallax use:nth-child(3){animation-delay:-4s;animation-duration:13s;fill:rgba(74,144,217,.6)}
.footer__parallax use:nth-child(4){animation-delay:-5s;animation-duration:20s;fill:var(--blue)}
@keyframes waveMove{0%{transform:translate3d(-90px,0,0)}100%{transform:translate3d(85px,0,0)}}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.25)}
.footer__brand{display:flex;align-items:center;gap:16px}
.footer__mark{height:70px;width:auto;filter:brightness(0) invert(1)}
.footer__name{direction:ltr;color:var(--white);font-weight:800;letter-spacing:.2em}
.footer__tag{direction:ltr;color:rgba(255,255,255,.85);font-size:13px}
.footer h4{color:var(--white);font-size:15px;margin-bottom:12px}
.footer a,.footer .muted{display:block;padding:3px 0;transition:color .25s}
.footer a:hover{color:var(--navy)}
.footer__bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-top:22px;font-size:13px;color:rgba(255,255,255,.8)}

/* ============ Reveal animation ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ============ Responsive ============ */
@media (max-width:1100px){
  .nav{position:fixed;inset:var(--header-h) 0 auto 0;flex-direction:column;align-items:stretch;gap:2px;padding:16px 20px 24px;
    background:rgba(74,144,217,.97);backdrop-filter:blur(14px);transform:translateY(-12px);opacity:0;pointer-events:none;transition:opacity .3s,transform .3s var(--ease)}
  .nav.is-open{opacity:1;transform:none;pointer-events:auto}
  .nav__link{padding:12px 14px;font-size:16px}
  .nav__login{margin:10px 0 0}
  .burger{display:block}
  .header__inner{flex-direction:row-reverse}
}
@media (max-width:900px){
  .about__grid{grid-template-columns:1fr}
  .about__media{max-width:420px}
  .systems__grid{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr 1fr}
  .footer__brand{grid-column:1/-1}
}
@media (max-width:600px){
  :root{--nav-h:62px;--marquee-h:34px}
  .marquee__group li{font-size:12.5px}
  .brand__mark{height:34px}
  .brand__en{font-size:19px;letter-spacing:.05em}
  .brand__sub{font-size:11.5px;letter-spacing:.12em}
  .stats__grid{grid-template-columns:1fr;padding:20px 0}
  .stat{padding:18px 0}
  .stat + .stat{border-inline-start:0;border-top:1px solid rgba(255,255,255,.25)}
  .section__head{align-items:center}
  .video-controls{left:14px;bottom:14px;gap:8px}
  .video-toggle{width:40px;height:40px}
  .sound-toggle{width:40px;padding:0;justify-content:center}
  .sound-label{display:none}
  .scroll-cue{display:none}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .hero__mark{animation:none}
}