:root{
  --olive:#6b7a3e;
  --olive-deep:#3f4f24;
  --leaf:#a8c957;
  --aqua:#54d2c9;
  --aqua-deep:#278f8a;
  --apricot:#f2a65a;
  --coral:#ef8354;
  --plum:#8d6a9f;
  --cream:#fbfaf4;
  --paper:#fffefa;
  --ink:#243329;
  --muted:#667268;
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Vazirmatn',Tahoma,sans-serif;
  background:
    radial-gradient(circle at 8% 4%,rgba(84,210,201,.13),transparent 24rem),
    radial-gradient(circle at 94% 32%,rgba(242,166,90,.12),transparent 22rem),
    var(--cream);
  color:var(--ink);
  line-height:1.6;
  padding:32px 16px 56px;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:.22;
  background-image:
    linear-gradient(rgba(107,122,62,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(107,122,62,.035) 1px,transparent 1px);
  background-size:26px 26px;
  mask-image:linear-gradient(to bottom,black,transparent 78%);
}
.page{max-width:960px;margin:0 auto;position:relative;}
.page-header{text-align:center;margin-bottom:42px;position:relative;}
.page-header::after{
  content:"";
  display:block;
  width:78px;
  height:5px;
  margin:18px auto 0;
  border-radius:999px;
  background:linear-gradient(90deg,var(--apricot),var(--aqua),var(--olive));
  box-shadow:0 0 24px rgba(84,210,201,.28);
}
.page-header img{max-width:100%;height:auto;display:block;margin:0 auto;filter:saturate(1.08) contrast(1.02);}
.section{margin-bottom:34px;position:relative;}
.section-header{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:12px;
  padding:0 0 9px;
  border-bottom:2px solid color-mix(in srgb,var(--accent) 42%,transparent);
  position:relative;
  isolation:isolate;
}
.section-header::after{
  content:"";
  position:absolute;
  right:0;
  bottom:-2px;
  width:92px;
  height:2px;
  background:var(--accent);
  box-shadow:0 0 16px color-mix(in srgb,var(--accent) 48%,transparent);
}
.section-number{
  font-size:.75rem;
  font-weight:800;
  color:var(--ink);
  background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 78%,#fff),var(--accent));
  width:28px;
  height:28px;
  border:2px solid rgba(255,255,255,.8);
  border-radius:10px 10px 10px 3px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  box-shadow:0 5px 14px color-mix(in srgb,var(--accent) 25%,transparent);
  transform:rotate(-5deg);
}
.section-title{font-size:1.18rem;font-weight:800;color:var(--accent);letter-spacing:-.02em;}
.subtopics{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;}
.subtopic{
  display:block;
  text-decoration:none;
  background:linear-gradient(135deg,rgba(255,255,255,.92),var(--paper));
  border:1px solid color-mix(in srgb,var(--accent) 25%,#e4e8df);
  border-right:4px solid var(--accent);
  border-radius:11px 5px 11px 5px;
  padding:10px 13px;
  font-size:.82rem;
  font-weight:600;
  color:var(--ink);
  box-shadow:0 3px 0 color-mix(in srgb,var(--accent) 12%,transparent);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease,background .25s ease;
}
.subtopic:hover,.subtopic:focus-visible{
  transform:translateY(-4px) rotate(.35deg);
  background:#fff;
  border-color:color-mix(in srgb,var(--accent) 55%,#fff);
  box-shadow:0 12px 24px color-mix(in srgb,var(--accent) 18%,transparent);
  outline:none;
}
.subtopic:focus-visible{box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 25%,#fff),0 12px 24px color-mix(in srgb,var(--accent) 18%,transparent);}
.sec-1{--accent:var(--aqua-deep);}
.sec-2{--accent:var(--olive);}
.sec-3{--accent:var(--coral);}
.sec-4{--accent:var(--aqua);}
.sec-5{--accent:var(--apricot);}
.sec-6{--accent:var(--plum);}
.section-header{
  opacity:0;
  transform:translate3d(72px,18px,0) rotateY(-12deg);
  transform-origin:right center;
  filter:blur(7px);
  clip-path:inset(0 0 0 100%);
  transition:opacity .78s cubic-bezier(.22,1,.36,1),transform .9s cubic-bezier(.22,1,.36,1),filter .78s ease,clip-path .9s cubic-bezier(.22,1,.36,1);
}
.section.is-visible .section-header{opacity:1;transform:none;filter:none;clip-path:inset(0);}
.section.is-visible .section-number{animation:number-pop .7s cubic-bezier(.22,1,.36,1) both;}
.section.is-visible .subtopic{animation:card-rise .65s cubic-bezier(.22,1,.36,1) both;animation-delay:calc(var(--item-index,0) * 70ms + 180ms);}
@keyframes number-pop{
  0%{transform:rotate(-16deg) scale(.62);}
  65%{transform:rotate(4deg) scale(1.08);}
  100%{transform:rotate(-5deg) scale(1);}
}
@keyframes card-rise{from{opacity:0;transform:translateY(12px) scale(.98);}to{opacity:1;transform:none;}}
@media(max-width:480px){
  body{padding:22px 12px 42px;}
  .page-header{margin-bottom:32px;}
  .section-title{font-size:1rem;}
  .subtopics{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));}
  .subtopic{font-size:.78rem;padding:8px 10px;}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;}
  .section-header{opacity:1;transform:none;filter:none;clip-path:none;}
}