/* PyCourse — homepage tour. Source: homepage-candidate.html (round 79), integrated: font, theme, compat fallbacks. All selectors scoped to #hp-root / .hp-. */
/* Vazirmatn — self-hosted (the site font); no external request. */
@font-face{font-family:'Vazirmatn';src:url('../fonts/Vazirmatn.woff2') format('woff2-variations');font-weight:300 900;font-style:normal;font-display:swap}
/* ==========================================================================
   PyCourse — homepage tour (merged build).  Everything scoped to #hp-root / .hp-
   Tokens are CSS variables; swap exact values at integration time.
   ========================================================================== */
html{color-scheme:dark}
html[data-theme="light"]{color-scheme:light}
body.hp-body{margin:0;background:#0a0e17}
html[data-theme="light"] body.hp-body{background:#f5f7fb}

#hp-root{
  --bg:#0a0e17;--bg-header:#0d111c;--surface:#151d30;--surface-2:#10192a;--ink:#070b12;
  --line:#212838;--line-2:#2b3547;
  --text:#e9eff8;--muted:#96a5bb;--dim:#7a8a9f;
  --primary:#2dd7f0;--primary-2:#65e4f5;--on-primary:#04161d;
  --ok:#3ddc97;--err:#f34546;
  --c0:#65e4f5;--c1:#4783ff;--c2:#2fbf9b;--c3:#8c5dff;--c4:#efa103;
  --c5:#f34546;--c6:#3fd8e0;
  --stop:#65e4f5;--sc:#65e4f5;
  --r:22px;--r-sm:14px;--pill:999px;
  --rail:52px;--headh:64px;--pad:clamp(14px,3.6vw,40px);
  --font-fa:"Vazirmatn",Tahoma,system-ui,sans-serif;
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Vazirmatn",Tahoma,monospace;
  --t1:.16s;--t2:.34s;--t3:.7s;
  --e1:cubic-bezier(.2,.8,.2,1);--e2:cubic-bezier(.5,0,.15,1);
  background:var(--bg);color:var(--text);
  font-family:var(--font-fa);font-size:16px;line-height:1.85;
  position:relative;overflow-x:clip;-webkit-text-size-adjust:100%;
}
#hp-root[data-theme="light"]{
  --bg:#f5f7fb;--bg-header:#ffffff;--surface:#ffffff;--surface-2:#eaeff7;--ink:#e3e9f3;
  --line:#dbe2ee;--line-2:#c6d0e0;
  --text:#0c1420;--muted:#4f5d74;--dim:#68748a;
  --primary:#0b7f96;--primary-2:#12a3bd;--on-primary:#ffffff;
  --ok:#0f8a5c;--err:#c62a2b;
  --c0:#0b7f96;--c1:#2a5fd6;--c2:#128a6c;--c3:#6a3fd0;--c4:#9c6a00;
  --c5:#c62a2b;--c6:#0e8fa8;--stop:#0b7f96;--sc:#0b7f96;
}
#hp-root *,#hp-root *::before,#hp-root *::after{box-sizing:border-box}
:where(#hp-root h1,#hp-root h2,#hp-root h3,#hp-root p,#hp-root ol,#hp-root ul,#hp-root figure,#hp-root pre){margin:0;padding:0}
:where(#hp-root ol,#hp-root ul){list-style:none}
:where(#hp-root a){color:inherit;text-decoration:none}
:where(#hp-root button,#hp-root input,#hp-root select){font:inherit;color:inherit}
#hp-root :focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:8px}

/* ---------- skip ---------- */
.hp-skip{position:absolute;inset-block-start:-100px;inset-inline-start:12px;z-index:99;
  background:var(--primary);color:var(--on-primary);padding:10px 16px;border-radius:12px;font-weight:700}
.hp-skip:focus{inset-block-start:12px}

/* ---------- header ---------- */
.hp-header{position:sticky;inset-block-start:env(safe-area-inset-top,0px);z-index:40;background:color-mix(in srgb,var(--bg-header) 92%,transparent);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-block-end:1px solid var(--line);min-height:var(--headh);
  display:flex;align-items:center;gap:12px;padding-inline:clamp(12px,3vw,28px)}
.hp-logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:18px}
.hp-logo-p{display:grid;place-items:center;width:30px;height:30px;border-radius:10px;
  background:linear-gradient(135deg,var(--primary-2),var(--primary));color:var(--on-primary);
  font-family:var(--mono);font-weight:700;font-size:15px;direction:ltr}
.hp-nav{display:flex;gap:6px;margin-inline-start:auto}
.hp-pill{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 16px;border-radius:var(--pill);
  border:1px solid var(--line);background:transparent;color:var(--muted);font-size:14.5px;font-weight:600;white-space:nowrap;
  transition:color var(--t1) var(--e1),border-color var(--t1) var(--e1),transform var(--t1) var(--e1)}
.hp-pill:hover{color:var(--text);border-color:var(--line-2)}
.hp-pill:active{transform:translateY(1px)}
.hp-pill-primary{background:linear-gradient(135deg,var(--primary-2),var(--primary));color:var(--on-primary);
  border-color:transparent;font-weight:800}
.hp-pill-primary:hover{color:var(--on-primary)}
@media (max-width:560px){.hp-pill{padding:0 12px;font-size:13.5px}.hp-nav{gap:5px}.hp-header{gap:8px}}
@media (max-width:380px){.hp-logo-t{display:none}}

/* ---------- rail (fixed map, on the inline-start = right edge in RTL) ---------- */
.hp-rail{position:fixed;inset-block-start:var(--headh);inset-block-end:96px;inset-inline-start:env(safe-area-inset-right,0px);
  width:var(--rail);z-index:35;pointer-events:none}
.hp-rail-track{position:absolute;inset-block:14px;inset-inline-start:50%;width:2px;margin-inline-start:-1px;
  background:var(--line);border-radius:2px;overflow:hidden}
.hp-rail-fill{position:absolute;inset:0;background:var(--stop);transform-origin:top;transform:scaleY(0);
  transition:transform .12s linear,background var(--t3) var(--e1)}
.hp-rail ol{position:absolute;inset-block:6px;inset-inline:0;display:flex;flex-direction:column;
  justify-content:space-between;align-items:center;pointer-events:auto}
.hp-rail a{display:grid;place-items:center;width:var(--rail);height:20px;position:relative}
.hp-rail a i{display:block;width:9px;height:9px;border-radius:50%;background:var(--bg);
  box-shadow:inset 0 0 0 2px var(--line-2);transition:transform var(--t2) var(--e1),box-shadow var(--t2) var(--e1),background var(--t2) var(--e1)}
.hp-rail a:hover i{box-shadow:inset 0 0 0 2px var(--muted)}
.hp-rail a[aria-current="step"] i{background:var(--stop);box-shadow:0 0 0 4px color-mix(in srgb,var(--stop) 22%,transparent);transform:scale(1.35)}
.hp-rail a.done i{box-shadow:inset 0 0 0 2px var(--stop)}
.hp-head{position:absolute;inset-inline-start:50%;inset-block-start:0;pointer-events:none;
  transition:transform var(--t2) var(--e1)}
.hp-head b{display:block;font-family:var(--mono);font-size:9px;direction:ltr;transform:translateX(-50%);
  color:var(--on-primary);background:var(--stop);padding:2px 5px;border-radius:5px;line-height:1.3;
  transition:background var(--t3) var(--e1)}
[dir="rtl"] .hp-head b{transform:translateX(50%)}
@media (max-width:760px){#hp-root{--rail:34px}.hp-head b{font-size:8px;padding:1px 3px}}

/* ---------- layout ---------- */
.hp-wrap{max-width:1180px;margin-inline:auto;padding-inline:var(--pad);
  padding-inline-start:calc(var(--rail) + var(--pad))}
.hp-stops{position:relative}
.hp-route{position:absolute;inset-block:0;inset-inline:0;width:100%;pointer-events:none;z-index:0;overflow:visible}
.hp-route .base{fill:none;stroke:var(--line-2);stroke-width:2;stroke-dasharray:2 9;stroke-linecap:round;stroke-linejoin:round}
.hp-route .prog{fill:none;stroke:var(--stop);stroke-width:2.5;stroke-dasharray:2 9;stroke-linecap:round;stroke-linejoin:round;
  transition:stroke var(--t3) var(--e1)}

/* ---------- stop ---------- */
.hp-stop{position:relative;isolation:isolate;padding-inline-start:64px;padding-block:clamp(34px,6vw,76px);z-index:1}
.hp-node{position:absolute;inset-inline-start:14px;inset-block-start:clamp(34px,6vw,76px);
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  background:var(--bg);box-shadow:inset 0 0 0 2px var(--line-2),0 0 0 6px var(--bg);
  font-family:var(--mono);font-size:12px;color:var(--dim);z-index:2;
  transition:box-shadow var(--t3) var(--e1),color var(--t3) var(--e1),transform var(--t2) var(--e1)}
.hp-stop.hp-on .hp-node{box-shadow:inset 0 0 0 2px var(--sc),0 0 0 6px var(--bg),0 0 22px -4px var(--sc);color:var(--text);transform:scale(1.06)}
.hp-ghost{position:absolute;inset-block-start:clamp(10px,2.4vw,30px);left:-6px;z-index:-1;
  font-weight:800;font-size:clamp(110px,18vw,230px);line-height:1;color:transparent;direction:ltr;
  -webkit-text-stroke:1px color-mix(in srgb,var(--sc) 24%,transparent);pointer-events:none;user-select:none}
.hp-kicker{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--dim);font-weight:600;margin-block-end:10px}
.hp-kn{font-family:var(--mono);direction:ltr;color:var(--sc);font-weight:700;font-size:13px}
.hp-badge{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:700;padding:3px 10px;border-radius:var(--pill);
  background:color-mix(in srgb,var(--ok) 16%,transparent);color:var(--ok);border:1px solid color-mix(in srgb,var(--ok) 32%,transparent)}
.hp-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.hp-stop h2{font-size:clamp(26px,4.4vw,46px);line-height:1.28;font-weight:800;letter-spacing:-.01em}
.hp-lede{color:var(--muted);font-size:clamp(15px,1.7vw,17.5px);max-width:54ch;margin-block-start:10px}
.hp-cap{color:var(--dim);font-size:14px;margin-block-start:16px;max-width:56ch}
.hp-cols>*,.hp-split>*{min-width:0}

/* guide voice */
.hp-guide{display:flex;align-items:flex-start;gap:10px;margin-block-start:18px;max-width:58ch;padding:9px 14px;
  border-radius:14px;background:color-mix(in srgb,var(--sc) 9%,transparent);
  border:1px solid color-mix(in srgb,var(--sc) 26%,transparent);font-size:13.5px;line-height:1.8;color:var(--muted)}
.hp-guide code{font-family:var(--mono);direction:ltr;color:var(--sc);font-weight:700;flex:none}
.hp-guide .hp-say{min-height:1.8em}
.hp-guide .hp-say b{color:var(--sc);font-weight:700}

/* ---------- split layout (desktop) ---------- */
.hp-split{display:grid;gap:26px;margin-block-start:26px}
@media (min-width:900px){
  .hp-split{grid-template-columns:5fr 7fr;gap:44px;align-items:center;margin-block-start:0}
  .hp-split.rev{grid-template-columns:7fr 5fr}
  .hp-split .hp-split-txt{order:0}
}
.hp-split-txt .hp-lede{max-width:46ch}

/* ---------- demo shell ---------- */
.hp-demo{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.hp-stop>.hp-demo,.hp-stop>.hp-cols,.hp-stop>.hp-split{margin-block-start:28px}
.hp-split>.hp-demo{margin-block-start:0}
.hp-bar{display:flex;align-items:center;gap:10px;padding:10px 14px;border-block-end:1px solid var(--line);
  background:var(--surface-2);font-size:12.5px;color:var(--dim)}
.hp-bar .hp-f{font-family:var(--mono);direction:ltr;color:var(--muted);font-size:12px}
.hp-tag{margin-inline-start:auto;font-size:11px;font-weight:700;color:var(--primary);
  border:1px solid color-mix(in srgb,var(--primary) 34%,transparent);border-radius:var(--pill);padding:2px 9px;white-space:nowrap}
.hp-dots{display:flex;gap:5px}
.hp-dots i{width:8px;height:8px;border-radius:50%;background:var(--line-2);display:block}
.hp-demo-body{padding:18px}

/* ---------- buttons ---------- */
.hp-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;
  border-radius:var(--r-sm);border:1px solid var(--line-2);background:var(--surface-2);color:var(--text);
  font-weight:700;font-size:14.5px;cursor:pointer;transition:transform var(--t1) var(--e1),border-color var(--t1),background var(--t1)}
.hp-btn:hover{border-color:var(--muted)}
.hp-btn:active{transform:translateY(1px)}
.hp-btn-p{background:linear-gradient(135deg,var(--primary-2),var(--primary));color:var(--on-primary);border-color:transparent}
.hp-btn-p:hover{color:var(--on-primary);border-color:transparent;filter:brightness(1.06)}
.hp-btn-sm{min-height:40px;padding:0 14px;font-size:13.5px}
.hp-cta{display:flex;flex-wrap:wrap;gap:12px;margin-block-start:26px}

/* ---------- code + syntax ---------- */
.hp-pre{direction:ltr;text-align:left;font-family:var(--mono);font-size:13.2px;line-height:2;overflow-x:auto;padding:4px 0}
.hp-pre code{display:block;white-space:pre}
.hp-ln{display:block;padding:1px 14px;border-inline-start:2px solid transparent;transition:background var(--t2) var(--e1),border-color var(--t2) var(--e1)}
.hp-ln.is-on{background:color-mix(in srgb,var(--stop) 15%,transparent);border-inline-start-color:var(--stop)}
.tk-k{color:#ff7ab6}.tk-f{color:#6ab0ff}.tk-s{color:#3ddc97}.tk-n{color:#efa103}.tk-c{color:#7a8a9f;font-style:italic}
#hp-root[data-theme="light"] .tk-k{color:#b4236a}#hp-root[data-theme="light"] .tk-f{color:#1f56c4}
#hp-root[data-theme="light"] .tk-s{color:#0f7a52}#hp-root[data-theme="light"] .tk-n{color:#8a5a00}
.hp-vars{direction:ltr;text-align:left;font-family:var(--mono);font-size:12.8px;color:var(--muted);
  border-block-start:1px solid var(--line);padding:12px 14px;min-height:96px}
.hp-vars b{color:var(--text);font-weight:600}
.hp-out{direction:ltr;font-family:var(--mono);font-size:13px;color:var(--ok);margin-inline-start:auto}
.hp-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:12px 14px;border-block-start:1px solid var(--line)}
.hp-caret{display:inline-block;width:8px;height:15px;background:var(--stop);vertical-align:-2px;margin-inline-start:2px;
  animation:hp-blink 1s steps(1) infinite}
.hp-caret-s{width:6px;height:13px;background:var(--sc);flex:none;align-self:center}
@keyframes hp-blink{50%{opacity:0}}

/* ---------- hero ---------- */
.hp-hero{padding-block:clamp(30px,6vw,70px) clamp(40px,6vw,76px)}
.hp-hero h1{font-size:clamp(30px,6.2vw,64px);line-height:1.24;font-weight:800;letter-spacing:-.01em;max-width:17ch}
.hp-hero h1 em{font-style:normal;background:linear-gradient(100deg,var(--primary-2),var(--c3));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hp-stats{display:flex;gap:10px 26px;margin-block-start:30px;flex-wrap:wrap;color:var(--dim);font-size:13.5px}
.hp-stats span{display:block}
.hp-stats b{display:block;font-size:22px;color:var(--text);font-family:var(--mono);direction:ltr;text-align:start;line-height:1.5}
.hp-stats b.fa{font-family:var(--font-fa);direction:rtl}
.hp-hero-grid{display:grid;gap:30px}
@media (min-width:900px){
  .hp-hero-grid{grid-template-columns:6.4fr 5.6fr;gap:44px;align-items:center}
}
.hp-cue{display:flex;align-items:center;gap:12px;margin-block-start:34px;color:var(--dim);font-size:13px}
.hp-cue i{display:block;width:2px;height:34px;border-radius:2px;background:linear-gradient(var(--primary),transparent);
  transform-origin:top;animation:hp-cue 1.8s var(--e2) infinite}
@keyframes hp-cue{0%{transform:scaleY(0)}60%{transform:scaleY(1);opacity:1}100%{transform:scaleY(1);opacity:0}}

/* ---------- generic 2-col ---------- */
.hp-cols{display:grid;gap:18px}
@media (min-width:860px){.hp-cols{grid-template-columns:1fr 1fr;gap:22px}}
.hp-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.hp-panel h3{font-size:14px;font-weight:700;color:var(--muted);margin-block-end:12px}

/* ---------- css toy (band) ---------- */
.hp-band{background:linear-gradient(180deg,color-mix(in srgb,var(--sc) 7%,var(--surface-2)),var(--surface-2));
  border:1px solid color-mix(in srgb,var(--sc) 22%,var(--line));border-radius:calc(var(--r) + 6px);padding:clamp(16px,3vw,30px)}
.hp-toy{display:grid;gap:18px}
@media (min-width:860px){.hp-toy{grid-template-columns:1.45fr 1fr;gap:26px;align-items:stretch}}
.hp-stage{background:var(--bg);border:1px dashed var(--line-2);border-radius:var(--r-sm);padding:clamp(14px,2.4vw,24px);
  display:flex;gap:var(--g,12px);flex-direction:var(--dir,row);min-height:200px;align-items:stretch;
  transition:gap var(--t2) var(--e1),background var(--t2) var(--e1)}
.hp-cardx{flex:1 1 0;min-width:0;min-height:96px;border-radius:var(--rr,18px);display:flex;flex-direction:column;justify-content:center;gap:8px;padding:12px;
  background:color-mix(in srgb,var(--sc) 14%,var(--surface));border:1px solid color-mix(in srgb,var(--sc) 40%,transparent);
  font-size:13px;color:var(--text);transition:border-radius var(--t1) linear,background var(--t2) var(--e1)}
.hp-cardx i{display:block;width:26px;height:26px;border-radius:calc(var(--rr,18px) / 2.2);background:var(--sc);opacity:.85}
.hp-cardx s{display:block;height:6px;border-radius:4px;background:color-mix(in srgb,var(--text) 22%,transparent);text-decoration:none}
.hp-cardx s+s{width:62%}
.hp-stage.lt{background:#eef2f9}
.hp-stage.lt .hp-cardx{background:#fff;border-color:#d5dced;color:#0c1420}
.hp-stage.lt .hp-cardx s{background:#c9d3e6}
.hp-ctl{display:block;margin-block-start:14px;font-size:13.5px;color:var(--muted)}
.hp-ctl:first-of-type{margin-block-start:0}
.hp-ctl input[type=range]{display:block;width:100%;margin-block-start:6px;accent-color:var(--sc);height:32px}
.hp-ctl select{min-height:44px;width:100%;margin-block-start:6px;background:var(--surface-2);
  border:1px solid var(--line-2);border-radius:12px;padding:0 12px}
.hp-sw{display:flex;align-items:center;gap:10px;min-height:44px;font-size:13.5px;color:var(--muted);margin-block-start:6px}
.hp-sw input{width:22px;height:22px;accent-color:var(--sc)}
.hp-css-code{direction:ltr;text-align:left;font-family:var(--mono);font-size:12px;color:var(--muted);margin-block-start:14px;
  padding:10px 12px;border-radius:12px;background:var(--bg);border:1px solid var(--line);overflow-x:auto;white-space:pre}

/* ---------- flow ---------- */
.hp-flow svg{width:100%;height:auto;display:block}
.hp-flow .fx-box{fill:var(--surface-2);stroke:var(--line-2);stroke-width:1.5;transition:stroke var(--t2) var(--e1),fill var(--t2) var(--e1)}
.hp-flow .fx-t{fill:var(--muted);font-family:var(--font-fa);font-size:12px;text-anchor:middle;transition:fill var(--t2)}
.hp-flow .fx-box.on{stroke:var(--sc);fill:color-mix(in srgb,var(--sc) 14%,var(--surface-2))}
.hp-flow .fx-t.on{fill:var(--text)}
.hp-flow .fx-dot{fill:var(--sc);filter:drop-shadow(0 0 6px var(--sc))}
.hp-pipe{display:grid;gap:8px;counter-reset:p}
.hp-pipe li{display:grid;grid-template-columns:30px 1fr;gap:12px;align-items:start;padding:8px 12px;border-radius:12px;
  border:1px solid transparent;font-size:14px;color:var(--dim);transition:color var(--t2) var(--e1),border-color var(--t2) var(--e1),background var(--t2) var(--e1)}
.hp-pipe li::before{counter-increment:p;content:counter(p,persian);width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
  font-family:var(--font-fa);font-size:12.5px;background:var(--surface-2);color:var(--dim);transition:background var(--t2),color var(--t2)}
.hp-pipe li b{color:inherit;font-weight:700}
.hp-pipe li.on{color:var(--text);border-color:color-mix(in srgb,var(--sc) 36%,transparent);background:color-mix(in srgb,var(--sc) 8%,transparent)}
.hp-pipe li.on::before{background:var(--sc);color:var(--on-primary)}

/* ---------- ml toy ---------- */
.hp-ml{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-sm);display:block;width:100%;height:auto;touch-action:none}
.hp-ml .grid{stroke:var(--line);stroke-width:1}
.hp-ml .pt{fill:var(--sc);stroke:var(--bg);stroke-width:2;cursor:grab;transition:r var(--t1) var(--e1)}
.hp-ml .pt:focus{outline:none;stroke:var(--text);stroke-width:3}
.hp-ml .pt.drag{cursor:grabbing;r:10}
.hp-ml .reg{stroke:var(--text);stroke-width:2.5;stroke-linecap:round}
.hp-eq{font-family:var(--mono);direction:ltr;text-align:center;font-size:clamp(15px,2.2vw,19px);color:var(--sc);margin-block-start:12px;font-weight:700}

/* ---------- terminal ---------- */
.hp-term{background:var(--ink);border-color:color-mix(in srgb,var(--sc) 24%,var(--line))}
.hp-term .hp-bar{background:transparent}
.hp-term pre{direction:ltr;text-align:left;font-family:var(--mono);font-size:13px;line-height:2.1;padding:16px;min-height:196px;overflow-x:auto}
.hp-term .l{display:block}
.hp-js .hp-term .l{opacity:0;transform:translateY(4px);transition:opacity var(--t2) var(--e1),transform var(--t2) var(--e1)}
.hp-js .hp-term .l.on{opacity:1;transform:none}
.hp-term .ok{color:var(--ok)}
.hp-term .cmd{color:var(--primary)}
.hp-term .mut{color:var(--dim)}
.hp-strip{display:flex;flex-wrap:wrap;gap:8px;padding:12px 14px;border-block-start:1px solid var(--line)}
.hp-strip span{font-family:var(--mono);font-size:11.5px;padding:4px 10px;border-radius:var(--pill);
  border:1px solid var(--line-2);color:var(--dim);transition:color var(--t2) var(--e1),border-color var(--t2) var(--e1)}
.hp-strip span.on{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 45%,transparent)}

/* ---------- chat sim ---------- */
.hp-chat{min-height:150px;display:flex;flex-direction:column;gap:10px;padding:6px 0}
.hp-bub{max-width:82%;padding:10px 14px;border-radius:16px;font-size:14px}
.hp-js .hp-bub{opacity:0;transform:translateY(10px);transition:opacity var(--t2) var(--e1),transform var(--t2) var(--e1)}
.hp-js .hp-bub.on{opacity:1;transform:none}
.hp-bub.u{align-self:flex-end;background:var(--surface-2);border:1px solid var(--line-2);direction:ltr;font-family:var(--mono);font-size:13px}
.hp-bub.b{align-self:flex-start;background:color-mix(in srgb,var(--sc) 16%,var(--surface-2));
  border:1px solid color-mix(in srgb,var(--sc) 34%,transparent)}
.hp-typing{align-self:flex-start;display:flex;gap:4px;padding:12px 16px;border-radius:16px;background:var(--surface-2);border:1px solid var(--line)}
.hp-typing i{width:6px;height:6px;border-radius:50%;background:var(--dim);display:block;animation:hp-tp 1.2s infinite}
.hp-typing i:nth-child(2){animation-delay:.16s}.hp-typing i:nth-child(3){animation-delay:.32s}
@keyframes hp-tp{0%,60%,100%{opacity:.28;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}

/* ---------- quiz ---------- */
.hp-q{font-size:17px;font-weight:700;line-height:1.8}
.hp-q code{font-family:var(--mono);direction:ltr;display:inline-block;background:var(--surface-2);
  border:1px solid var(--line-2);border-radius:8px;padding:1px 8px;font-size:15px}
.hp-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-block-start:18px}
@media (max-width:520px){.hp-opts{grid-template-columns:1fr}}
.hp-opt{min-height:52px;text-align:start;padding:0 16px;border-radius:var(--r-sm);border:1px solid var(--line-2);
  background:var(--surface-2);font-size:14.5px;cursor:pointer;
  transition:border-color var(--t1),background var(--t1),transform var(--t1) var(--e1)}
.hp-opt.m{font-family:var(--mono);direction:ltr}
.hp-opt:hover:not(:disabled){border-color:var(--muted)}
.hp-opt:disabled{cursor:default;opacity:.5}
.hp-opt.good{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 14%,var(--surface-2));opacity:1;animation:hp-pop .34s var(--e1)}
.hp-opt.bad{border-color:var(--err);background:color-mix(in srgb,var(--err) 12%,var(--surface-2));animation:hp-shake .26s var(--e1)}
@keyframes hp-pop{0%{transform:scale(1)}45%{transform:scale(1.035)}100%{transform:scale(1)}}
@keyframes hp-shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
.hp-exp{margin-block-start:16px;padding:14px 16px;border-radius:var(--r-sm);border:1px solid color-mix(in srgb,var(--ok) 34%,transparent);
  background:color-mix(in srgb,var(--ok) 9%,transparent);font-size:14.5px;min-height:64px;visibility:hidden}
.hp-exp.on{visibility:visible;animation:hp-in var(--t2) var(--e1)}
@keyframes hp-in{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
.hp-meter{height:10px;border-radius:var(--pill);background:var(--surface-2);border:1px solid var(--line);overflow:hidden}
.hp-meter i{display:block;height:100%;width:64%;background:linear-gradient(90deg,var(--sc),var(--primary));
  transform-origin:right;transition:transform .9s var(--e1)}
.hp-js .hp-meter i{transform:scaleX(0)}
.hp-js .hp-meter.on i{transform:scaleX(1)}
.hp-ring{width:88px;height:88px;display:block;flex:none}
.hp-ring circle{fill:none;stroke-width:6;stroke-linecap:round}
.hp-ring .bgc{stroke:var(--line-2)}
.hp-ring .fgc{stroke:var(--c4);stroke-dasharray:226;stroke-dashoffset:0;transform:rotate(-90deg);transform-origin:50% 50%;
  transition:stroke-dashoffset 8s linear}
.hp-ring.go .fgc{stroke-dashoffset:226}
.hp-ml2{display:flex;gap:16px;align-items:center;color:var(--dim);font-size:13px}

/* ---------- live room ---------- */
.hp-tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.hp-tile{position:relative;aspect-ratio:16/10;border-radius:var(--r-sm);border:1px solid var(--line);
  background:var(--surface-2);display:grid;place-items:center;align-content:center;gap:2px;font-size:24px;font-weight:800;
  color:color-mix(in srgb,var(--sc) 70%,var(--text))}
.hp-tile small{font-size:11.5px;font-weight:600;color:var(--dim)}
.hp-js .hp-tile{opacity:0;transform:translateY(8px);transition:opacity var(--t2) var(--e1),transform var(--t2) var(--e1)}
.hp-js .hp-tile.on{opacity:1;transform:none}
.hp-tile.talk{border-color:color-mix(in srgb,var(--sc) 55%,transparent);box-shadow:0 0 0 0 color-mix(in srgb,var(--sc) 45%,transparent)}
.hp-tile.talk.on{animation:hp-talk 1.8s ease-out infinite}
@keyframes hp-talk{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--sc) 40%,transparent)}100%{box-shadow:0 0 0 12px transparent}}
.hp-hand{position:absolute;inset-block-start:8px;inset-inline-end:8px;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;background:var(--c4);color:#1a1300}
.hp-hand svg{width:14px;height:14px}
.hp-js .hp-hand{transform:scale(0);transition:transform var(--t2) var(--e1)}
.hp-js .hp-hand.on{transform:scale(1)}
.hp-board{position:relative;margin-block-start:12px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--surface-2);overflow:hidden}
.hp-board svg{width:100%;height:auto;display:block}
.hp-board path{fill:none;stroke:var(--sc);stroke-width:3;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:420;stroke-dashoffset:0}
.hp-js .hp-board path{stroke-dashoffset:420;transition:stroke-dashoffset 1.8s var(--e1)}
.hp-js .hp-board.go path{stroke-dashoffset:0}
.hp-board code{display:block;direction:ltr;text-align:left;font-family:var(--mono);font-size:12px;color:var(--sc);padding:10px 12px;
  border-block-start:1px dashed var(--line-2);overflow-x:auto;white-space:nowrap}

/* ---------- discussion ---------- */
.hp-live{display:inline-flex;align-items:center;gap:6px}
.hp-live::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--ok);animation:hp-pulse 2s ease-out infinite}
@keyframes hp-pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--ok) 55%,transparent)}100%{box-shadow:0 0 0 9px transparent}}
.hp-msg{display:grid;grid-template-columns:38px 1fr;gap:12px;padding:14px 0;border-block-end:1px solid var(--line)}
.hp-msg.new{animation:hp-slide .5s var(--e1)}
@keyframes hp-slide{from{opacity:0;transform:translateY(-14px)}to{opacity:1;transform:none}}
.hp-av{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;font-weight:700;font-size:15px;color:#06121a}
.hp-msg-h{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.hp-msg-h b{font-size:14px}
.hp-msg-h time{font-size:12px;color:var(--dim)}
.hp-msg p{font-size:14.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}
.hp-typing-row{display:grid;grid-template-columns:38px 1fr;gap:12px;padding:14px 0;align-items:center;color:var(--dim);font-size:12.5px}
.hp-skel{height:14px;border-radius:7px;background:linear-gradient(90deg,var(--surface-2),var(--line),var(--surface-2));
  background-size:200% 100%;animation:hp-sk 1.4s linear infinite;margin-block:6px}
@keyframes hp-sk{0%{background-position:200% 0}100%{background-position:-200% 0}}
.hp-note{font-size:12.5px;color:var(--dim);margin-block-start:12px}
.hp-warn{font-size:12.5px;color:var(--c4);margin-block-start:6px}
.hp-empty{color:var(--dim);font-size:14px;padding:26px 0;text-align:center}
.hp-wide{max-width:880px}

/* ---------- articles ---------- */
.hp-arts{display:grid;gap:18px;margin-block-start:26px}
@media (min-width:760px){
  .hp-arts{grid-template-columns:1.25fr 1fr;grid-template-rows:auto auto}
  .hp-art-lead{grid-row:1 / span 2}
}
.hp-art{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;transition:transform var(--t2) var(--e1),border-color var(--t2) var(--e1)}
.hp-art:hover{transform:translateY(-4px);border-color:var(--line-2)}
.hp-cover{aspect-ratio:16/9;background:linear-gradient(135deg,var(--sc),var(--surface-2));position:relative;overflow:hidden}
.hp-art-lead .hp-cover{aspect-ratio:16/10}
.hp-cover img{width:100%;height:100%;object-fit:cover;display:block}
.hp-art-b{padding:16px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.hp-art-b .t{font-size:16.5px;font-weight:700;line-height:1.7}
.hp-art-lead .hp-art-b .t{font-size:20px}
.hp-art-b .x{font-size:13.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.hp-more{margin-block-start:auto;font-size:13.5px;font-weight:700;color:var(--primary);display:flex;align-items:center;gap:6px}
.hp-art:hover .hp-more svg{transform:translateX(-4px)}
.hp-more svg{transition:transform var(--t2) var(--e1)}
.hp-tagc{font-size:11px;font-weight:700;color:var(--primary);border:1px solid color-mix(in srgb,var(--primary) 34%,transparent);
  border-radius:var(--pill);padding:2px 9px;align-self:flex-start}

/* ---------- join ---------- */
.hp-pass{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px;position:relative;overflow:hidden}
.hp-pass::before{content:"";position:absolute;inset-inline-start:-1px;inset-block:0;width:8px;
  background:repeating-linear-gradient(180deg,var(--line-2) 0 6px,transparent 6px 14px)}
.hp-pass .pn{font-family:var(--mono);direction:ltr;font-size:12px;color:var(--dim);letter-spacing:.12em;text-align:start}
.hp-pass .pt{font-size:22px;font-weight:800;margin-block:6px 18px}
.hp-steps{counter-reset:s;display:grid;gap:12px}
.hp-steps li{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start;font-size:14.5px;color:var(--muted)}
.hp-steps li::before{counter-increment:s;content:counter(s,persian);width:34px;height:34px;border-radius:12px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--sc) 18%,var(--surface-2));color:var(--sc);font-family:var(--font-fa);font-weight:700;font-size:14px}
.hp-steps b{color:var(--text);display:block;font-size:15px}
.hp-links{display:grid;gap:10px}
.hp-link{display:flex;align-items:center;gap:14px;padding:14px 16px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--surface-2);
  transition:border-color var(--t1) var(--e1),transform var(--t1) var(--e1)}
.hp-link:hover{border-color:var(--sc);transform:translateX(-3px)}
.hp-link svg{width:20px;height:20px;flex:none;color:var(--sc)}
.hp-link b{display:block;font-size:14.5px}
.hp-link span{display:block;font-size:12.5px;color:var(--dim)}
.hp-link em{margin-inline-start:auto;font-style:normal;color:var(--dim)}

/* ---------- footer ---------- */
.hp-footer{border-block-start:1px solid var(--line);margin-block-start:30px;padding-inline-start:var(--rail);padding-block-end:84px}
.hp-footer-in{max-width:1180px;margin-inline:auto;padding:30px var(--pad);
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;color:var(--dim);font-size:13px}
.hp-footer nav{display:flex;gap:8px;margin-inline-start:auto}

/* ---------- tour pill ---------- */
.hp-tour{position:fixed;inset-block-end:max(14px,env(safe-area-inset-bottom));inset-inline:0;margin-inline:auto;
  width:max-content;max-width:calc(100vw - 24px);z-index:45;display:flex;align-items:center;gap:6px;
  background:color-mix(in srgb,var(--surface) 94%,transparent);border:1px solid var(--line-2);
  border-radius:var(--pill);padding:6px 8px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  box-shadow:0 12px 34px -14px rgba(0,0,0,.7);
  opacity:0;transform:translateY(14px);pointer-events:none;transition:opacity var(--t2) var(--e1),transform var(--t2) var(--e1)}
.hp-tour.on{opacity:1;transform:none;pointer-events:auto}
.hp-tour button{width:44px;height:44px;border-radius:50%;border:1px solid transparent;background:transparent;
  color:var(--muted);cursor:pointer;display:grid;place-items:center;transition:color var(--t1),background var(--t1)}
.hp-tour button:hover{color:var(--text);background:var(--surface-2)}
.hp-tour button[aria-pressed="true"]{color:var(--on-primary);background:var(--stop)}
.hp-tour-l{font-size:12.5px;color:var(--dim);padding-inline:12px;max-width:46vw;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap;border-inline-end:1px solid var(--line)}
.hp-tour-l b{color:var(--text)}
.hp-tour svg{width:18px;height:18px;display:block}

/* ---------- reveal (only when JS runs) ---------- */
.hp-js .hp-rv{opacity:0;transform:translateY(16px);transition:opacity var(--t3) var(--e1),transform var(--t3) var(--e1)}
.hp-js .hp-rv.in{opacity:1;transform:none}

/* ---------- compact (phones): the fixed rail IS the route ---------- */
@media (max-width:760px){
  .hp-route,.hp-node{display:none}
  .hp-stop{padding-inline-start:0}
  .hp-ghost{font-size:120px;left:-4px;opacity:.8}
  .hp-demo-body{padding:14px}
  .hp-hero h1{max-width:none}
  .hp-lede,.hp-guide{max-width:none}
}

@media (prefers-reduced-motion:reduce){
  #hp-root *,#hp-root *::before,#hp-root *::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .hp-js .hp-rv{opacity:1;transform:none}
  .hp-cue{display:none}
}

/* ==========================================================================
   Additions / overrides (merged build)
   ========================================================================== */
.hp-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.hp-head{transition:none}
.hp-stop>.hp-split{margin-block-start:0}
@media (min-width:900px){
  .hp-split.rev .hp-split-txt{order:2}
  .hp-split{align-items:center}
}
.hp-theme{width:44px;padding:0;justify-content:center}
.hp-theme svg{width:18px;height:18px;display:block}
@media (max-width:520px){.hp-pill-hide{display:none}}
@media (max-height:520px){#hp-root{--rail:0px}.hp-rail,.hp-tour{display:none}}

/* hero entrance (only with JS) */
.hp-js .hp-hero-txt>*,.hp-js .hp-hero-code{animation:hp-up .8s var(--e1) both}
.hp-js .hp-hero-txt>*:nth-child(2){animation-delay:.08s}
.hp-js .hp-hero-txt>*:nth-child(3){animation-delay:.16s}
.hp-js .hp-hero-txt>*:nth-child(4){animation-delay:.24s}
.hp-js .hp-hero-txt>*:nth-child(5){animation-delay:.32s}
.hp-js .hp-hero-txt>*:nth-child(6){animation-delay:.4s}
.hp-js .hp-hero-code{animation-delay:.3s}
@keyframes hp-up{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.hp-hero-code{align-self:center}
.hp-hero .hp-guide{margin-block-start:22px}

/* misc layout helpers */
.hp-stack{display:grid;gap:16px}
.hp-panel p{font-size:14.5px;color:var(--muted)}
.hp-panel .hp-cap{font-size:13.5px;color:var(--dim)}
.hp-split-txt .hp-panel{margin-block-start:20px}
.hp-split-txt .hp-pipe{margin-block-start:18px}
.hp-demo>.hp-pre{padding-block:10px}
.hp-demo .hp-pre+.hp-pre{border-block-start:1px solid var(--line)}
.hp-fcode{border-block-start:1px solid var(--line);padding:6px 4px}
.hp-fcode .hp-pre{font-size:12.5px;line-height:1.9}
.hp-bar .hp-tag{margin-inline-start:auto}
.hp-out[hidden]{display:none}
.hp-art-lead .hp-art-b .x{-webkit-line-clamp:4}
.hp-msgs-wrap{min-height:200px}
.hp-skelrow{display:grid;grid-template-columns:38px 1fr;gap:12px;padding:14px 0;border-block-end:1px solid var(--line)}
.hp-skelav{width:38px;height:38px;border-radius:12px;margin:0}
.hp-w34{width:34%}.hp-w78{width:78%}
.hp-pass .hp-cta{margin-block-start:22px}
.hp-lede.hp-lede-wide{max-width:60ch}
.hp-tour-l{min-width:0}
.hp-badge[hidden]{display:none}
.hp-more-link{margin-block-start:14px}
.hp-ctl select{appearance:auto}
@media (max-width:760px){
  .hp-stop{padding-block:clamp(30px,8vw,52px)}
  .hp-tour-l{max-width:38vw}
  .hp-stage{min-height:170px}
}

.hp-guide .hp-say{position:relative;flex:1;min-width:0}
.hp-say .sz{color:transparent}
.hp-say .ty{position:absolute;inset:0}

.hp-pre.pad{padding:12px 16px}
.hp-pre bdi{unicode-bidi:isolate}
.hp-head b{margin-block-start:0}
/* flow: horizontal on wide, vertical on phones */
.hp-flow .fx-track{fill:none;stroke:var(--line-2);stroke-width:2;stroke-dasharray:2 7;stroke-linecap:round}
.hp-flow .fx-v{display:none}
@media (max-width:760px){
  .hp-flow .fx-h{display:none}
  .hp-flow svg.fx-v{display:block;max-width:300px;margin-inline:auto}
}

.hp-kn,.hp-guide code,.hp-logo-p,.hp-eq,.hp-out,.hp-f,.hp-head b{unicode-bidi:isolate}
@media (min-width:900px){.hp-hero-code .hp-pre{font-size:15px;line-height:2.1}.hp-hero-code .hp-pre.pad{padding:18px 20px}}

.hp-pre bdi,.hp-out bdi,.hp-vars bdi{font-family:var(--font-fa);font-size:.95em}
@media (min-width:760px){.hp-art-lead .hp-cover{flex:1;aspect-ratio:auto;min-height:240px}}

.hp-stop{scroll-margin-block-start:68px}
#hp-root{color-scheme:dark}#hp-root[data-theme="light"]{color-scheme:light}

.hp-chips{display:flex;flex-wrap:wrap;gap:8px;margin-block-start:16px}
.hp-chips li{font-size:12.5px;padding:3px 12px;border-radius:var(--pill);border:1px solid var(--line-2);color:var(--muted);background:var(--surface-2)}
.hp-tour-l small{display:block;font-size:11px;color:var(--dim);line-height:1.4}
.hp-tour-l{line-height:1.5}

/* the hidden attribute must win over component display rules (e.g. .hp-tag) */
#hp-root [hidden]{display:none!important}

/* ==========================================================================
   COMPAT — browsers without color-mix() (Chrome/WebView < 111, Safari < 16.2,
   Firefox < 113). Without it every declaration below is dropped and the page
   loses its tints; these plain colours keep it readable. overflow:clip
   (Chrome 90+) falls back to hidden.
   ========================================================================== */
@supports not (color:color-mix(in srgb,red,blue)){
  .hp-header{background:var(--bg-header)}
  .hp-tour{background:var(--surface)}
  .hp-rail a[aria-current="step"] i{box-shadow:0 0 0 4px rgba(127,127,127,.28)}
  .hp-ghost{-webkit-text-stroke:1px var(--line-2)}
  .hp-badge{background:rgba(61,220,151,.16);border-color:rgba(61,220,151,.32)}
  .hp-guide,.hp-pipe li.on{background:var(--surface-2)}
  .hp-guide,.hp-tag,.hp-tagc,.hp-band,.hp-cardx,.hp-term,.hp-bub.b{border-color:var(--line-2)}
  .hp-pipe li.on,.hp-tile.talk{border-color:var(--line-2)}
  .hp-strip span.on{border-color:var(--ok)}
  .hp-ln.is-on{background:rgba(127,127,127,.16)}
  .hp-band,.hp-cardx,.hp-bub.b,.hp-steps li::before{background:var(--surface-2)}
  .hp-cardx s{background:rgba(127,127,127,.3)}
  .hp-flow .fx-box.on{fill:var(--surface)}
  .hp-opt.good{background:rgba(61,220,151,.14)}
  .hp-opt.bad{background:rgba(243,69,70,.12)}
  .hp-exp{background:rgba(61,220,151,.09);border-color:rgba(61,220,151,.34)}
  .hp-tile{color:var(--text)}
  #hp-root{overflow-x:hidden}
}