/* Loading screen + welcome page (shown before the main page). Works offline. */
html.gate-lock,html.gate-lock body{overflow:hidden}
.gate{position:fixed;inset:0;z-index:2000;display:flex;overflow:auto;overscroll-behavior:contain;padding:20px 16px;
  background:radial-gradient(900px 520px at 12% 8%,var(--primary-soft),transparent 60%),radial-gradient(800px 520px at 92% 96%,var(--accent-soft),transparent 60%),var(--bg);
  color:var(--text);transition:opacity .45s ease,visibility .45s ease}
.gate[lang="fa"]{font-family:"Vazirmatn",Tahoma,system-ui,sans-serif;line-height:1.9}
.gate[lang="en"]{font-family:var(--font);line-height:1.7}
.gate[lang="fa"] [data-l="en"],.gate:not([lang="fa"]) [data-l="fa"]{display:none!important}
.gate.is-out{opacity:0;visibility:hidden;pointer-events:none}

/* loading */
.g-load{margin:auto;display:flex;flex-direction:column;align-items:center;gap:22px;text-align:center}
.gate.is-welcome .g-load{display:none}
.g-orb{position:relative;width:118px;height:118px;display:grid;place-items:center}
.g-orb::before{content:"";position:absolute;inset:0;border-radius:50%;border:5px solid var(--border);border-top-color:var(--primary);border-inline-end-color:var(--accent);animation:g-spin 1s linear infinite}
.g-logo{width:74px;height:74px;border-radius:22px;display:grid;place-items:center;font-size:40px;background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:var(--shadow)}
.g-load .g-orb .g-logo{animation:g-pulse 1.6s ease-in-out infinite}
.g-load p{margin:0;font-size:19px;font-weight:700;color:var(--muted)}
.g-bar{width:min(300px,70vw);height:8px;border-radius:99px;background:var(--surface-2);border:1px solid var(--border);overflow:hidden}
.g-bar span{display:block;height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .25s ease}

/* welcome card */
.g-card{display:none;margin:auto;width:100%;max-width:680px;background:var(--surface);border:1px solid var(--border);border-radius:26px;box-shadow:var(--shadow);padding:clamp(20px,3.5vw,34px)}
.gate.is-welcome .g-card{display:block;animation:g-up .5s ease both}
.g-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.g-tag{background:var(--primary-soft);color:var(--primary);font-weight:700;font-size:14.5px;padding:5px 14px;border-radius:999px}
.g-lang{border:1px solid var(--border);background:var(--surface);color:var(--primary);height:38px;min-width:46px;padding:0 12px;border-radius:12px;font:inherit;font-weight:800;font-size:15px;cursor:pointer;flex:none}
.g-lang:hover{border-color:var(--primary)}
.g-head{display:flex;align-items:center;gap:14px}
.g-head .g-logo{width:58px;height:58px;font-size:30px;border-radius:17px;flex:none}
.g-card h1{font-size:clamp(25px,4vw,34px);font-weight:800;line-height:1.25;margin:0;letter-spacing:-.01em}
.g-lead{color:var(--muted);font-size:17.5px;margin:10px 0 16px}
.g-author{display:flex;align-items:center;gap:16px;background:var(--surface-2);border:1px solid var(--border);border-radius:18px;padding:12px 16px;margin-bottom:14px}
.g-av{width:58px;height:58px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:30px;background:linear-gradient(135deg,var(--primary),var(--accent))}
.g-author small{display:block;color:var(--muted);font-weight:600;font-size:14.5px}
.g-author b{display:block;font-size:22px;line-height:1.4}
.g-author span.g-role{display:block;color:var(--muted);font-size:16px}
.g-box{margin:0 0 14px}
.g-box h2{font-size:17px;margin:0 0 6px}
.g-rules{margin:0;padding:0;list-style:none}
.g-rules li{display:flex;gap:10px;align-items:flex-start;font-size:16px;padding:5px 0;border-bottom:1px dashed var(--border)}
.g-rules li:last-child{border-bottom:0}
.g-rules li i{font-style:normal;flex:none}
.g-ok{display:flex;align-items:center;gap:12px;font-weight:700;font-size:17px;cursor:pointer;padding:10px 14px;border:2px solid var(--border);border-radius:14px;margin-bottom:12px;user-select:none}
.g-ok:has(input:checked){border-color:var(--green);background:var(--green-soft)}
.g-ok input{width:22px;height:22px;accent-color:var(--green);cursor:pointer;flex:none;margin:0}
.g-go{width:100%;height:54px;border:0;border-radius:15px;font:inherit;font-weight:800;font-size:19px;color:#fff;cursor:pointer;background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:0 6px 20px color-mix(in srgb,var(--primary) 35%,transparent);transition:transform .15s,opacity .2s}
.g-go:hover:not(:disabled){transform:translateY(-2px)}
.g-go:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}
.g-go:focus-visible,.g-lang:focus-visible,.g-ok input:focus-visible{outline:3px solid var(--primary);outline-offset:3px}

@media (max-width:480px){
  .gate{padding:10px}
  .g-card{padding:18px 16px;border-radius:20px}
  .g-top{margin-bottom:10px}
  .g-tag{font-size:13px;padding:4px 11px}
  .g-head .g-logo{width:48px;height:48px;font-size:25px;border-radius:14px}
  .g-lead{font-size:15.5px;margin:8px 0 12px}
  .g-author{padding:10px 12px;gap:12px;margin-bottom:12px}
  .g-av{width:46px;height:46px;font-size:24px}
  .g-author b{font-size:19px}
  .g-author span.g-role{font-size:14.5px}
  .g-box{margin-bottom:12px}
  .g-rules li{font-size:15px;padding:4px 0}
  .g-ok{font-size:16px;padding:9px 12px}
  .g-go{height:50px;font-size:18px}
}
@keyframes g-spin{to{transform:rotate(360deg)}}
@keyframes g-pulse{50%{transform:scale(.92)}}
@keyframes g-up{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion: reduce){.gate,.gate *{animation:none!important;transition:none!important}}
@media print{.gate{display:none!important}html.gate-lock,html.gate-lock body{overflow:visible}}