/* ============================================================
   R.O.B Forum v3 — premium theme (Flarum/Discourse-inspired)
   tokens → base → layout → components → responsive → RTL
   ============================================================ */
:root{
  --acc:#4c8dff; --acc2:#7ab0ff; --acc-ink:#fff;
  --ok:#2fd27f; --warn:#f7b32b; --danger:#f4516c; --hot:#ff7a59;
  --bg:#070a11; --bg2:#0b0f18; --card:#121826; --card2:#172033; --card3:#1e2940;
  --tx:#eef2f9; --tx2:#c3ccdd; --mut:#8792a8; --line:#212b3f; --line2:#2b3752;
  --br:16px; --br-sm:10px; --pill:999px;
  --sh:0 1px 2px rgba(0,0,0,.35), 0 16px 40px rgba(0,0,0,.32);
  --sh-sm:0 1px 2px rgba(0,0,0,.28);
  --maxw:1140px; --font:system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
}
@media (prefers-color-scheme: light){
  :root{ --bg:#f4f6fb; --bg2:#fff; --card:#fff; --card2:#f6f9fe; --card3:#eef3fb;
    --tx:#101725; --tx2:#364256; --mut:#606d84; --line:#e3e9f3; --line2:#d3dce9;
    --acc:#1b6ae0; --acc2:#0e4fae; --ok:#0f9d58; --danger:#d1364f;
    --sh:0 1px 2px rgba(16,24,40,.06), 0 14px 36px rgba(16,24,40,.09); }
}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:
  radial-gradient(1000px 460px at 88% -10%, rgba(76,141,255,.18), transparent 60%),
  radial-gradient(700px 360px at 4% 2%, rgba(47,210,127,.10), transparent 55%),
  var(--bg);color:var(--tx);font:15.5px/1.62 var(--font);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
a{color:var(--acc2);text-decoration:none}a:hover{text-decoration:underline}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(76,141,255,.4);border-radius:8px}
h1,h2,h3{line-height:1.22;letter-spacing:-.02em}
::selection{background:rgba(76,141,255,.35)}

/* header */
.fhdr{position:sticky;top:0;z-index:60;backdrop-filter:saturate(170%) blur(14px);
  background:color-mix(in srgb, var(--bg2) 80%, transparent);border-bottom:1px solid var(--line)}
.fhdr-in{max-width:var(--maxw);margin:0 auto;padding:12px 18px;display:flex;align-items:center;gap:14px}
.fbrand{font-weight:850;font-size:18px;letter-spacing:-.03em;
  background:linear-gradient(92deg,var(--tx),var(--acc2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.fbrand:hover{text-decoration:none}
.fbrand-sub{color:var(--mut);font-weight:600;font-size:13px;margin-inline-start:6px;-webkit-text-fill-color:var(--mut)}
.fnav{margin-inline-start:auto;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.fnav a{color:var(--tx2);font-size:14px;padding:7px 12px;border-radius:var(--pill);transition:background .15s,color .15s}
.fnav a:hover{background:var(--card2);color:var(--tx);text-decoration:none}
.fuser{color:var(--ok);font-size:13px;font-weight:650;max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
/* Language switcher (visitor) */
.flang{position:relative}
.flang-toggle{display:inline-flex;align-items:center;gap:7px;background:transparent;border:1px solid var(--line2);
  border-radius:var(--pill);padding:6px 12px;color:var(--tx2);font:inherit;font-size:13px;font-weight:700;cursor:pointer;transition:.18s}
.flang-toggle:hover{border-color:var(--acc);color:var(--acc2)}
.flang-flag{font-size:16px;line-height:1}
.flang-caret{font-size:10px;color:var(--mut)}
.flang-menu{position:absolute;top:calc(100% + 8px);inset-inline-end:0;min-width:176px;max-height:min(70vh,420px);overflow:auto;z-index:80;
  list-style:none;margin:0;padding:6px;background:var(--card);border:1px solid var(--line2);border-radius:var(--br-sm);
  box-shadow:var(--sh);display:none}
.flang.open .flang-menu{display:block}
.flang-menu a{display:flex;align-items:center;gap:10px;padding:8px 11px;border-radius:9px;font-size:14px;color:var(--tx2)}
.flang-menu a:hover{background:var(--card2);color:var(--tx);text-decoration:none}
.flang-menu a[aria-selected="true"]{background:color-mix(in srgb,var(--acc) 14%,transparent);color:var(--acc2);font-weight:700}
.inl{display:inline}
.fmain{max-width:var(--maxw);margin:0 auto;padding:24px 18px 56px}

/* hero (index) */
.fhero{text-align:center;padding:34px 0 22px}
.fhero .fkick{display:inline-block;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--acc2);
  background:rgba(76,141,255,.12);border:1px solid rgba(76,141,255,.3);border-radius:var(--pill);padding:6px 14px;margin-bottom:14px}
.fhero h1{font-size:clamp(26px,4.6vw,42px);margin:0 0 10px;font-weight:850}
.fhero p{color:var(--mut);max-width:62ch;margin:0 auto;font-size:15.5px}
.fstats{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px}
.fstat{background:var(--card);border:1px solid var(--line);border-radius:var(--pill);padding:7px 16px;font-size:13px;color:var(--tx2)}
.fstat b{color:var(--tx)}

/* buttons */
.fbtn{display:inline-flex;align-items:center;justify-content:center;gap:7px;background:var(--acc);color:var(--acc-ink);
  border:1px solid transparent;border-radius:var(--br-sm);padding:9px 18px;font-weight:650;font-size:14px;cursor:pointer;
  font-family:inherit;line-height:1;transition:filter .15s,background .15s,transform .06s}
.fbtn:hover{filter:brightness(1.1);text-decoration:none}.fbtn:active{transform:translateY(1px)}
.fbtn-ghost{background:transparent;border-color:var(--line2);color:var(--tx)}
.fbtn-ghost:hover{background:var(--card2);filter:none;border-color:var(--acc)}
.fbtn-xs{padding:5px 12px;font-size:12.5px;border-radius:var(--pill)}
.fbtn-wide{width:100%;margin-top:12px}

/* cards */
.fcard{background:var(--card);border:1px solid var(--line);border-radius:var(--br);padding:20px;margin-bottom:16px;box-shadow:var(--sh-sm)}
.fcard-narrow{max-width:470px;margin:30px auto}
.fh1{font-size:clamp(21px,3.2vw,27px);margin:6px 0 8px;font-weight:800}
.fh2{font-size:20px;margin:0 0 14px;font-weight:750}
.fh3{font-size:15.5px;margin:0 0 10px;font-weight:700}
.frules{color:var(--mut);font-size:13px;margin:0 0 20px}
.fcrumbs{color:var(--mut);font-size:12.5px;margin-bottom:10px;display:flex;flex-wrap:wrap;gap:5px;align-items:center}
.fcrumbs a{color:var(--mut)}.fcrumbs a:hover{color:var(--acc2)}

/* boards grid */
.fboards{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(330px,1fr))}
.fboard{display:flex;align-items:center;gap:15px;background:var(--card);border:1px solid var(--line);border-radius:var(--br);
  padding:16px 18px;color:var(--tx);box-shadow:var(--sh-sm);position:relative;overflow:hidden;
  transition:transform .16s,border-color .16s}
.fboard::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 55%,rgba(76,141,255,.10));opacity:0;transition:opacity .2s}
.fboard:hover{border-color:var(--acc);transform:translateY(-2px);text-decoration:none}
.fboard:hover::after{opacity:1}
.fboard-icon{font-size:24px;width:50px;height:50px;flex:0 0 50px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(76,141,255,.22),rgba(47,210,127,.14));border-radius:14px}
.fboard-name{font-weight:750;font-size:15.5px}
.fboard-meta{color:var(--mut);font-size:12.5px;margin-top:3px}
.fboard-last{margin-inline-start:auto;color:var(--mut);font-size:11.5px;max-width:220px;text-align:end;line-height:1.35}
.fboard-desc{color:var(--tx2);font-size:14px;margin:0 0 16px;max-width:70ch}
.fboard-cta{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 18px}

/* table */
.ftable-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--br);background:var(--card);box-shadow:var(--sh-sm)}
.ftable{width:100%;border-collapse:collapse;min-width:560px}
.ftable th{text-align:start;color:var(--mut);font-size:11px;text-transform:uppercase;letter-spacing:.5px;
  padding:12px 15px;border-bottom:1px solid var(--line);font-weight:650;white-space:nowrap}
.ftable td{padding:13px 15px;border-bottom:1px solid var(--line);font-size:14px;vertical-align:middle}
.ftable tbody tr:last-child td{border-bottom:0}
.ftable tbody tr{transition:background .12s}
.ftable tbody tr:hover{background:var(--card2)}
.ftd-title{display:flex;align-items:center;gap:9px}
.ftd-title a{color:var(--tx);font-weight:650}
.ftd-title a:hover{color:var(--acc2)}
.ftd-num{color:var(--mut);font-variant-numeric:tabular-nums;white-space:nowrap}
.ftd-author{color:var(--tx2);white-space:nowrap}
.fpin,.flock{font-size:12px}
.fav{width:28px;height:28px;flex:0 0 28px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:750;
  background:linear-gradient(135deg,var(--acc),var(--ok));color:#07130d;text-transform:uppercase}

/* posts / thread */
.fposts{display:grid;gap:12px}
.fpost{background:var(--card);border:1px solid var(--line);border-radius:var(--br);padding:16px 18px;box-shadow:var(--sh-sm);
  transition:border-color .15s}
.fpost:hover{border-color:var(--line2)}
.fpost-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.fpost-author{font-weight:700;color:var(--tx)}
.fpost-meta{color:var(--mut);font-size:12px;font-variant-numeric:tabular-nums}
.fpost-body{white-space:pre-wrap;word-wrap:break-word;overflow-wrap:anywhere;color:var(--tx2);font-size:15px}
.ftrans{margin-top:10px}
.ftrans-out{margin-top:8px;color:var(--tx2);font-size:14.5px;white-space:pre-wrap;border-inline-start:2px solid var(--acc);padding-inline-start:12px;display:none}
.ftrans-out.on{display:block}
.freply{margin-top:8px}
.fbadge{display:inline-block;font-size:11px;background:var(--card3);color:var(--mut);border-radius:var(--pill);padding:3px 10px}

/* forms */
.flabel{display:block;color:var(--mut);font-size:12.5px;margin:14px 0 5px;font-weight:550}
.finput{width:100%;background:var(--bg2);border:1px solid var(--line2);color:var(--tx);border-radius:var(--br-sm);
  padding:10px 13px;font-size:14px;font-family:inherit;transition:border-color .15s,box-shadow .15s}
.finput::placeholder{color:var(--mut)}
.finput:focus{outline:none;border-color:var(--acc);box-shadow:0 0 0 3px rgba(76,141,255,.28)}
.ftextarea{resize:vertical;min-height:96px;line-height:1.55}
form{margin:0}

/* alerts */
.falert{background:rgba(244,81,108,.12);border:1px solid var(--danger);color:var(--danger);border-radius:var(--br-sm);padding:10px 13px;font-size:13.5px;margin-bottom:12px}
.falert a{color:var(--danger);text-decoration:underline;font-weight:650}
.fokbar{background:rgba(47,210,127,.12);border:1px solid var(--ok);color:var(--ok);border-radius:var(--br-sm);padding:10px 13px;font-size:13.5px;margin-bottom:12px}
.flocked-note{color:var(--warn);font-size:13px;background:rgba(247,179,43,.1);border:1px solid var(--warn);border-radius:var(--br-sm);padding:9px 12px;margin-bottom:14px}
.fempty{color:var(--mut);text-align:center;padding:24px}
.fswap{color:var(--mut);font-size:13px;margin-top:16px;text-align:center}

/* footer */
.ffoot{border-top:1px solid var(--line);margin-top:34px;padding:24px 18px;color:var(--mut);font-size:12.5px;text-align:center;background:var(--bg2)}
.ffoot p{margin:5px 0}.ffoot a{color:var(--mut);margin:0 3px}.ffoot a:hover{color:var(--acc2)}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.fstack{display:grid;gap:10px}
.fthread-new summary{list-style:none}.fthread-new summary::-webkit-details-marker{display:none}
.fthread-new summary::before{content:"＋ ";color:var(--acc2);font-weight:800}

/* RTL */
[dir="rtl"] .fboard-last{text-align:start}

/* responsive */
@media (max-width:760px){
  .fhdr-in{padding:10px 13px;gap:8px}.fbrand-sub{display:none}
  .fnav a{padding:6px 8px}
  .fmain{padding:16px 13px 44px}
  .fboards{grid-template-columns:1fr}.fboard-last{display:none}
  .ftable{min-width:480px}
  .ftable th:nth-child(2),.ftable td:nth-child(2),.ftable th:nth-child(4),.ftable td:nth-child(4){display:none}
  .fhero{padding:24px 0 14px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}