@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #0a0a12;
  --bg-soft: #11121d;
  --card-solid: #161724;
  --border: #262842;
  --border-soft: #1e2036;
  --text: #eceefb;
  --muted: #9599b8;
  --dim: #6a6e8f;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --accent-3: #f472b6;
  --gold: #fbbf24;
  --green: #34d399;
  --radius: 18px;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.7);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Vazirmatn, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 15px;
  line-height: 1.85;
  direction: rtl;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* animated aurora backdrop */
body::before {
  content: '';
  position: fixed;
  inset: -20%;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 500px at 85% 8%, rgba(124, 92, 255, 0.22), transparent 60%),
    radial-gradient(700px 420px at 8% 18%, rgba(34, 211, 238, 0.14), transparent 60%),
    radial-gradient(600px 400px at 50% 92%, rgba(244, 114, 182, 0.10), transparent 60%);
  animation: aurora 26s ease-in-out infinite alternate;
}
@keyframes aurora {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(-2%, 2%, 0) scale(1.06); }
  100% { transform: translate3d(2%, -2%, 0) scale(1.02); }
}

.wrap { max-width: 1240px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
code, pre, .mono { font-family: 'JetBrains Mono', ui-monospace, monospace; direction: ltr; }
h1, h2, h3 { line-height: 1.5; }

.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: absolute; inset-inline-start: -9999px; top: 8px; z-index: 200;
  background: var(--accent); color: #fff; padding: 10px 18px; border-radius: 10px;
}
.skip:focus { inset-inline-start: 20px; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; border-radius: 6px; }

/* ---------- header ---------- */
header.site {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(10, 10, 18, 0.82);
  border-bottom: 1px solid var(--border-soft);
}
.hdr { display: flex; align-items: center; gap: 18px; height: 68px; }
.logo { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 20px; letter-spacing: -0.3px; }
.logo .mark {
  width: 36px; height: 36px; border-radius: 11px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; font-size: 19px;
  box-shadow: 0 6px 20px -6px var(--accent);
  animation: pulse-mark 4.5s ease-in-out infinite;
}
@keyframes pulse-mark {
  0%, 100% { box-shadow: 0 6px 20px -6px var(--accent); }
  50%      { box-shadow: 0 6px 30px -4px var(--accent-2); }
}
.logo:hover .mark { transform: rotate(-8deg) scale(1.06); transition: 0.25s; }
.logo small { display: block; font-size: 10.5px; font-weight: 400; color: var(--dim); letter-spacing: 2px; line-height: 1; }
.hdr nav { display: flex; gap: 4px; margin-inline-start: auto; align-items: center; }
.hdr nav a {
  padding: 8px 14px; border-radius: 10px; font-size: 13.5px; color: var(--muted);
  transition: 0.18s; position: relative;
}
.hdr nav a::after {
  content: ''; position: absolute; inset-inline: 14px; bottom: 4px; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0); transform-origin: right; transition: transform 0.25s;
  border-radius: 2px;
}
.hdr nav a:hover { color: var(--text); }
.hdr nav a:hover::after, .hdr nav a[aria-current]::after { transform: scaleX(1); }
.hdr nav a.cta { color: var(--accent-2); }

/* ---------- hero ---------- */
.hero { padding: 66px 0 34px; text-align: center; position: relative; }

.orbs { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.orbs span {
  position: absolute; border-radius: 50%; filter: blur(46px); opacity: 0.5;
}
.orbs span:nth-child(1) { width: 260px; height: 260px; background: #7c5cff66; top: -30px; inset-inline-start: 6%; animation: float1 15s ease-in-out infinite; }
.orbs span:nth-child(2) { width: 200px; height: 200px; background: #22d3ee55; top: 60px; inset-inline-end: 10%; animation: float2 19s ease-in-out infinite; }
.orbs span:nth-child(3) { width: 170px; height: 170px; background: #f472b644; bottom: -50px; inset-inline-start: 42%; animation: float3 22s ease-in-out infinite; }
@keyframes float1 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(28px,34px); } }
@keyframes float2 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-34px,26px); } }
@keyframes float3 { 0%,100% { transform: translate(0,0); } 50% { transform: translate(22px,-30px); } }

.hero .badge {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 20px;
  padding: 6px 15px; border-radius: 999px; font-size: 12.5px; color: var(--accent-2);
  background: #22d3ee14; border: 1px solid #22d3ee2e;
  animation: rise-in 0.7s cubic-bezier(0.2, 1, 0.3, 1) both;
}
.hero .badge .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--green);
  box-shadow: 0 0 10px var(--green); animation: blink 2.2s ease-in-out infinite;
}
@keyframes blink { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.45; transform: scale(0.82); } }

.hero h1 {
  font-size: clamp(30px, 5.2vw, 52px); font-weight: 800; margin: 0 0 16px;
  line-height: 1.35; letter-spacing: -1px;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 38%, var(--accent-3) 68%, var(--accent) 100%);
  background-size: 300% 100%;
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  animation: shimmer 7s linear infinite;
}
@keyframes shimmer { to { background-position: -300% 0; } }

.lede { max-width: 680px; margin: 0 auto 26px; color: var(--muted); font-size: 16px; }

/* entrance animations */
.reveal { animation: rise-in 0.75s cubic-bezier(0.2, 1, 0.3, 1) both; }
.reveal.d1 { animation-delay: 0.09s; }
.reveal.d2 { animation-delay: 0.18s; }
.reveal.d3 { animation-delay: 0.27s; }
@keyframes rise-in { from { opacity: 0; transform: translateY(20px); } }

.searchbar { max-width: 620px; margin: 0 auto; position: relative; }
.searchbar input {
  width: 100%; padding: 16px 52px 16px 18px; font-size: 15px; font-family: inherit;
  background: var(--card-solid); border: 1px solid var(--border); border-radius: 15px; color: var(--text);
  outline: none; transition: 0.22s; box-shadow: var(--shadow);
}
.searchbar input:focus {
  border-color: var(--accent); box-shadow: 0 0 0 4px #7c5cff1f, var(--shadow);
  transform: translateY(-2px);
}
.searchbar .icon { position: absolute; inset-inline-start: 18px; top: 50%; transform: translateY(-50%); color: var(--dim); pointer-events: none; }

.stats-row { display: flex; justify-content: center; gap: 34px; flex-wrap: wrap; margin-top: 30px; }
.stat b { display: block; font-size: 25px; font-weight: 800; color: var(--text); line-height: 1.3; font-variant-numeric: tabular-nums; }
.stat span { font-size: 12.5px; color: var(--dim); }

/* ---------- category chips ---------- */
.chips { display: flex; gap: 9px; flex-wrap: wrap; justify-content: center; margin: 34px auto 8px; }
.chip {
  padding: 8px 15px; border-radius: 11px; background: var(--card-solid);
  border: 1px solid var(--border-soft); color: var(--muted); font-size: 13.5px;
  transition: 0.18s cubic-bezier(0.2, 1, 0.3, 1); display: inline-flex; align-items: center; gap: 7px;
}
.chip:hover { border-color: var(--accent); color: var(--text); transform: translateY(-3px); box-shadow: 0 10px 24px -14px var(--accent); }
.chip.active { background: linear-gradient(135deg, var(--accent), #6247e0); border-color: transparent; color: #fff; }
.chip .n { font-size: 11px; opacity: 0.65; }

/* ---------- toolbar ---------- */
.toolbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin: 26px 0 20px; padding-bottom: 16px; border-bottom: 1px solid var(--border-soft);
}
.toolbar .count { color: var(--muted); font-size: 13.5px; margin-inline-end: auto; }
.toolbar .count b { color: var(--text); }
select.sel {
  background: var(--card-solid); border: 1px solid var(--border); color: var(--text);
  padding: 8px 12px; border-radius: 10px; font-size: 13px; font-family: inherit; outline: none;
  transition: 0.18s;
}
select.sel:hover { border-color: var(--accent); }

/* ---------- grid + cards ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 17px; }

.card {
  position: relative; background: var(--card-solid); border: 1px solid var(--border-soft);
  border-radius: var(--radius); transition: 0.25s cubic-bezier(0.2, 1, 0.3, 1); overflow: hidden;
}
.card-link { display: flex; flex-direction: column; gap: 11px; padding: 20px; height: 100%; }
.card::after {
  content: ''; position: absolute; inset: 0; border-radius: var(--radius); pointer-events: none;
  background: linear-gradient(135deg, transparent 55%, #7c5cff14); opacity: 0; transition: 0.25s;
}
.card::before {
  content: ''; position: absolute; inset-inline: 0; top: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  transform: scaleX(0); transform-origin: right; transition: transform 0.35s;
}
.card:hover { transform: translateY(-5px); border-color: #3a3d63; box-shadow: var(--shadow); }
.card:hover::after { opacity: 1; }
.card:hover::before { transform: scaleX(1); }
.card.feat { border-color: #fbbf2440; }

/* staggered entrance for grids */
.stagger > * { animation: card-in 0.55s cubic-bezier(0.2, 1, 0.3, 1) both; }
@keyframes card-in { from { opacity: 0; transform: translateY(16px) scale(0.985); } }
.stagger > *:nth-child(1) { animation-delay: .02s } .stagger > *:nth-child(2) { animation-delay: .05s }
.stagger > *:nth-child(3) { animation-delay: .08s } .stagger > *:nth-child(4) { animation-delay: .11s }
.stagger > *:nth-child(5) { animation-delay: .14s } .stagger > *:nth-child(6) { animation-delay: .17s }
.stagger > *:nth-child(7) { animation-delay: .20s } .stagger > *:nth-child(8) { animation-delay: .23s }
.stagger > *:nth-child(9) { animation-delay: .26s } .stagger > *:nth-child(10) { animation-delay: .29s }
.stagger > *:nth-child(n+11) { animation-delay: .32s }

.card .top { display: flex; align-items: flex-start; gap: 10px; }
.card .tw { min-width: 0; }
.card .cat-ico {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: #ffffff09; border: 1px solid var(--border-soft); font-size: 18px; flex-shrink: 0;
  transition: 0.25s;
}
.card:hover .cat-ico { background: #7c5cff1f; border-color: #7c5cff40; transform: scale(1.08) rotate(-6deg); }
.card h3, .card .h3 { margin: 0; font-size: 15.5px; font-weight: 700; line-height: 1.6; }
.card .cat-name { font-size: 11.5px; color: var(--dim); }
.card p.sum {
  margin: 0; font-size: 13px; color: var(--muted); line-height: 1.9;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.card .meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: auto; padding-top: 6px; }
.pill {
  font-size: 11px; padding: 3px 9px; border-radius: 7px;
  background: #ffffff0a; border: 1px solid var(--border-soft); color: var(--muted);
  display: inline-block;
}
a.pill:hover { border-color: var(--accent); color: var(--text); }
.pill.easy { color: var(--green); border-color: #34d39930; background: #34d39912; }
.pill.medium { color: var(--accent-2); border-color: #22d3ee30; background: #22d3ee12; }
.pill.advanced { color: var(--accent-3); border-color: #f472b630; background: #f472b612; }
.pill.gold { color: var(--gold); border-color: #fbbf2430; background: #fbbf2412; }
.card .stat-mini { margin-inline-start: auto; font-size: 11.5px; color: var(--dim); }

/* ---------- breadcrumbs / page heads ---------- */
.crumbs { font-size: 12.5px; color: var(--dim); padding: 20px 0 4px; }
.crumbs a:hover { color: var(--accent-2); }
.cat-head { padding: 18px 0 8px; }
.cat-head h1 { font-size: clamp(24px, 4vw, 36px); font-weight: 800; margin: 0 0 10px; letter-spacing: -0.6px; }
.cat-head .lede { margin-inline: 0; max-width: 720px; }

/* ---------- pager ---------- */
.pager { display: flex; justify-content: center; gap: 7px; margin: 36px 0 60px; flex-wrap: wrap; }
.pager button, .pager a, .pager span {
  min-width: 39px; height: 39px; padding: 0 14px; border-radius: 10px;
  background: var(--card-solid); border: 1px solid var(--border-soft); color: var(--muted);
  font-size: 13.5px; transition: 0.16s; display: inline-flex; align-items: center; justify-content: center;
}
.pager button:hover:not(:disabled), .pager a:hover { border-color: var(--accent); color: var(--text); transform: translateY(-2px); }
.pager .on { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.pager button:disabled { opacity: 0.35; cursor: default; }

/* ---------- article / detail ---------- */
.article { padding-bottom: 20px; }
.sheet {
  max-width: 880px; margin: 12px auto 60px; background: var(--bg-soft);
  border: 1px solid var(--border); border-radius: 22px; box-shadow: var(--shadow); overflow: hidden;
}
.sheet.static { animation: rise-in 0.5s cubic-bezier(0.2, 1, 0.3, 1) both; }

.sheet .sh-head {
  padding: 28px 30px 24px; border-bottom: 1px solid var(--border-soft);
  background: linear-gradient(135deg, #7c5cff14, transparent 70%);
  position: relative;
}
.sheet .sh-head h1, .sheet .sh-head h2 { margin: 0 0 12px; font-size: 24px; font-weight: 800; line-height: 1.5; padding-inline-end: 40px; }
.sheet .sh-head .lede { margin: 14px 0 0; text-align: right; max-width: none; font-size: 13.8px; }
.close-x {
  position: absolute; top: 20px; inset-inline-end: 22px; width: 34px; height: 34px; border-radius: 10px;
  background: #ffffff0f; border: 1px solid var(--border); color: var(--muted); font-size: 17px; line-height: 1;
}
.close-x:hover { background: #ffffff1a; color: var(--text); }

.sh-body { padding: 26px 30px 34px; }
.sec { margin-bottom: 30px; }
.sec > h2, .sec > h4 {
  margin: 0 0 12px; font-size: 15px; font-weight: 700; display: flex; align-items: center; gap: 9px;
}
.sec > h2 .ic, .sec > h4 .ic {
  width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; font-size: 13px;
  background: #7c5cff1c; border: 1px solid #7c5cff30; flex-shrink: 0;
}

.prompt-box { position: relative; }
.prompt-box pre {
  /* extra headroom so the floating copy button never lands on the first line */
  margin: 0; padding: 64px 20px 20px; background: #0c0d16; border: 1px solid var(--border);
  border-radius: 14px; white-space: pre-wrap; word-break: break-word; direction: ltr; text-align: left;
  font-size: 12.8px; line-height: 1.95; max-height: 440px; overflow-y: auto; color: #dfe3ff;
}
.copybtn {
  position: absolute; top: 12px; inset-inline-end: 12px;
  padding: 9px 16px; border-radius: 10px; font-size: 12.5px; font-weight: 600;
  background: linear-gradient(135deg, var(--accent), #6247e0); border: none; color: #fff;
  box-shadow: 0 6px 18px -8px var(--accent); transition: 0.18s;
}
.copybtn:hover { transform: translateY(-2px); box-shadow: 0 10px 22px -8px var(--accent); }
.copybtn.done { background: var(--green); animation: pop 0.32s ease; }
@keyframes pop { 50% { transform: scale(1.09); } }

.howto { font-size: 13.8px; color: #c9cdec; }
.howto p { margin: 0 0 13px; }
.howto strong { color: var(--text); font-weight: 700; }
.howto code { background: #7c5cff1f; border: 1px solid #7c5cff33; color: #c4b5fd; padding: 1px 7px; border-radius: 6px; font-size: 12px; }
.howto em { color: var(--accent-2); font-style: normal; }

ul.tips { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
ul.tips li {
  padding: 12px 15px; background: #ffffff06; border: 1px solid var(--border-soft);
  border-inline-start: 3px solid var(--gold); border-radius: 11px; font-size: 13.2px; color: var(--muted);
  transition: 0.18s;
}
ul.tips li:hover { background: #ffffff0b; transform: translateX(-3px); }

.varbox { display: flex; flex-direction: column; gap: 9px; }
.varbox .v {
  display: flex; align-items: center; gap: 12px; padding: 11px 15px;
  background: #ffffff06; border: 1px solid var(--border-soft); border-radius: 11px; font-size: 13px;
}
.varbox .v code { background: #22d3ee1a; border: 1px solid #22d3ee33; color: var(--accent-2); padding: 2px 9px; border-radius: 7px; font-size: 12px; }
.varbox .v span { color: var(--muted); font-size: 12.5px; }

.note {
  padding: 15px 18px; border-radius: 13px; font-size: 13.2px; color: var(--muted);
  background: #22d3ee0d; border: 1px solid #22d3ee26; white-space: pre-wrap;
}
.note.out { background: #34d3990d; border-color: #34d39926; }

.kv { display: flex; gap: 9px; flex-wrap: wrap; }

.rel-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 11px; }
.rel {
  display: block; padding: 13px 15px; background: #ffffff06; border: 1px solid var(--border-soft);
  border-radius: 12px; font-size: 13px; transition: 0.18s; line-height: 1.65; color: var(--muted);
}
.rel:hover { border-color: var(--accent); background: #7c5cff0f; color: var(--text); transform: translateY(-2px); }

/* FAQ */
.faq details {
  border: 1px solid var(--border-soft); border-radius: 12px; padding: 4px 16px;
  margin-bottom: 9px; background: #ffffff05; transition: 0.18s;
}
.faq details[open] { border-color: #7c5cff40; background: #7c5cff08; }
.faq summary { cursor: pointer; padding: 11px 0; font-weight: 600; font-size: 13.6px; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: '＋'; color: var(--accent-2); margin-inline-end: 9px; }
.faq details[open] summary::before { content: '－'; }
.faq p { margin: 0 0 14px; color: var(--muted); font-size: 13.2px; }

/* SEO copy block */
.seo-block { max-width: 820px; margin: 20px auto 40px; }
.seo-block h2 { font-size: 18px; margin: 28px 0 10px; font-weight: 700; }
.seo-block p { color: var(--muted); font-size: 13.8px; margin: 0; }

/* ---------- misc ---------- */
.empty { text-align: center; padding: 70px 20px; color: var(--dim); grid-column: 1 / -1; }
.empty .big { font-size: 46px; margin-bottom: 14px; }
.empty h1 { font-size: 22px; color: var(--text); }
.btn-link {
  display: inline-block; margin-top: 10px; padding: 11px 22px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #6247e0); color: #fff; font-weight: 600; font-size: 13.5px;
}
.btn-link:hover { transform: translateY(-2px); }

.skeleton {
  height: 186px; border-radius: var(--radius); border: 1px solid var(--border-soft);
  background: linear-gradient(100deg, #16172400, #ffffff08, #16172400);
  background-size: 200% 100%; animation: sk 1.4s infinite;
}
@keyframes sk { to { background-position: -200% 0; } }

footer.site {
  border-top: 1px solid var(--border-soft); padding: 34px 0; margin-top: 40px;
  color: var(--dim); font-size: 13px; text-align: center; position: relative; z-index: 1;
}
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--accent-2); }
.foot-cats { display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: center; margin-bottom: 22px; font-size: 12.5px; }
footer.site .dim { opacity: 0.7; }

.toast {
  position: fixed; bottom: 26px; inset-inline-start: 50%; transform: translateX(50%) translateY(90px);
  background: var(--card-solid); border: 1px solid var(--green); color: var(--text);
  padding: 12px 22px; border-radius: 13px; font-size: 13.5px; z-index: 200;
  box-shadow: var(--shadow); transition: transform 0.32s cubic-bezier(0.2, 1, 0.3, 1);
}
.toast.show { transform: translateX(50%) translateY(0); }

/* scroll progress bar on article pages */
.progress {
  position: fixed; top: 0; inset-inline: 0; height: 3px; z-index: 60;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  transform-origin: right; transform: scaleX(0);
}

@media (max-width: 720px) {
  .hdr nav a:not(.cta) { display: none; }
  .hero { padding: 40px 0 26px; }
  .sheet { margin: 8px auto 40px; border-radius: 16px; }
  .sh-body, .sheet .sh-head { padding-left: 18px; padding-right: 18px; }
  .stats-row { gap: 22px; }
  .grid { grid-template-columns: 1fr; }
}

/* Users who ask for less motion get a static, equally usable page. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  html { scroll-behavior: auto; }
}