/* THE FORGE — design system
   Values grounded in xniper-design (app·desktop lane, dark):
   body 14 / meta 12 (3/3), working weight 500 (2/3), radius 10 (3/3),
   gap-8 base with tight inner spacing, small ground→surface step +
   strong text→muted contrast, one accent on primary action, one subtle shadow. */

:root{
  /* ground → surface: deliberately small steps (measured) */
  --ground:#0b0914;
  --surface:#121020;
  --surface-2:#191630;
  --elevated:#201c3a;
  --border:#2b2650;
  --border-soft:#211d3c;

  /* text → muted: a large step (measured) */
  --text:#f3f1fb;
  --muted:#9d99c4;
  --faint:#6b6690;

  /* brand */
  --accent:#6c5ce7;
  --accent-bright:#8273f6;
  --accent-deep:#3e33a6;
  --flame-1:#3e33a6; --flame-2:#6c5ce7; --flame-3:#9385f7;
  --danger:#ff5b6a; --success:#56d98a; --warn:#f3c969;

  /* radius — one control radius (10), one card radius (12), panel (14) */
  --r-control:10px; --r-card:12px; --r-panel:14px; --r-pill:999px;

  /* spacing scale 4·8·12·16·24·32 (gap-8 base) */
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s6:24px; --s8:32px;

  /* one subtle shadow family */
  --shadow:0 6px 20px rgba(0,0,0,.35);
  --shadow-accent:0 8px 26px rgba(108,92,231,.22);

  --sans:'Inter',system-ui,-apple-system,sans-serif;
  --display:'Sora','Inter',sans-serif;
  --mono:'JetBrains Mono','Fira Code',ui-monospace,monospace;

  --sidebar:252px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--ground);
  color:var(--text);
  font-family:var(--sans);
  font-size:14px;            /* app body (3/3) */
  font-weight:500;           /* workhorse weight (2/3) */
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  letter-spacing:-0.01em;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
::selection{background:rgba(108,92,231,.35)}

/* ambient flame field for dark pages */
.ambient{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.ambient::before{content:"";position:absolute;left:50%;top:38%;width:620px;height:620px;transform:translate(-50%,-50%);
  background:radial-gradient(circle, rgba(108,92,231,.20), transparent 62%);filter:blur(10px);animation:breathe 7s ease-in-out infinite}
.ambient::after{content:"";position:absolute;inset:0;
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(62,51,166,.18), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(108,92,231,.12), transparent 60%);}
@keyframes breathe{0%,100%{opacity:.75;transform:translate(-50%,-50%) scale(1)}50%{opacity:1;transform:translate(-50%,-52%) scale(1.06)}}

/* faint grid texture — editorial, not glassmorphism */
.grid-tex{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:40px 40px;mask-image:radial-gradient(circle at 50% 40%, #000 30%, transparent 75%)}

/* cursor spotlight */
.spotlight{position:relative;isolation:isolate}
.spotlight::before{content:"";position:absolute;inset:0;z-index:-1;border-radius:inherit;pointer-events:none;
  background:radial-gradient(340px circle at var(--mx,50%) var(--my,-30%), rgba(108,92,231,.16), transparent 60%)}

/* ---------- type helpers ---------- */
.kicker{font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-bright)}
.title{font-family:var(--display);font-size:31px;font-weight:600;letter-spacing:-0.02em;line-height:1.1;margin:0}
.h2{font-family:var(--display);font-size:20px;font-weight:600;letter-spacing:-0.01em;margin:0}
.h3{font-size:17px;font-weight:600;margin:0}
.meta{font-size:12px;color:var(--muted)}
.muted{color:var(--muted)}
.mono{font-family:var(--mono)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--s2);
  height:44px;padding:0 18px;border-radius:var(--r-control);border:1px solid transparent;
  font-size:14px;font-weight:600;cursor:pointer;transition:transform .15s ease,background .15s,border-color .15s,box-shadow .15s;white-space:nowrap}
.btn-primary{color:#fff;background:linear-gradient(180deg,var(--accent-bright),var(--accent));box-shadow:var(--shadow-accent)}
.btn-primary:hover{box-shadow:0 10px 30px rgba(108,92,231,.38)}
.btn-ghost{background:var(--surface-2);color:var(--text);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--accent);color:#fff}
.btn-danger{background:transparent;color:var(--danger);border-color:rgba(255,91,106,.4)}
.btn-danger:hover{background:rgba(255,91,106,.12)}
.btn-sm{height:34px;padding:0 12px;font-size:13px}
.btn-block{width:100%}

/* ---------- inputs ---------- */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:var(--s4)}
.field label{font-size:12px;font-weight:600;color:var(--muted)}
.input{height:44px;padding:0 14px;border-radius:var(--r-control);border:1px solid var(--border);
  background:var(--ground);color:var(--text);font-size:14px;font-family:inherit;transition:border-color .15s,box-shadow .15s;width:100%}
.input::placeholder{color:var(--faint)}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(108,92,231,.18)}
textarea.input{height:auto;padding:12px 14px;resize:vertical;line-height:1.6}

/* ---------- cards / panels ---------- */
.card{position:relative;background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--r-card);padding:var(--s4)}
.panel{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--r-panel);padding:var(--s6)}
.hoverable{transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;will-change:transform}
.hoverable:hover{border-color:var(--accent);box-shadow:var(--shadow-accent)}
.card-accent{border-top:2px solid transparent;border-image:linear-gradient(90deg,var(--flame-1),var(--flame-2),var(--flame-3)) 1}

/* stat tile — number-led (label UNDER number) */
.stat .stat-num{font-family:var(--display);font-size:28px;font-weight:600;line-height:1;letter-spacing:-0.02em}
.stat .stat-label{font-size:12px;color:var(--muted);margin-top:6px}

/* chips / tags / badges */
.chip{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:11px;font-weight:600;background:var(--surface-2);color:var(--muted);border:1px solid var(--border-soft)}
.chip-accent{color:var(--accent-bright);background:rgba(108,92,231,.12);border-color:rgba(108,92,231,.3)}
.chip-ok{color:var(--success);background:rgba(86,217,138,.1);border-color:rgba(86,217,138,.28)}
.badge{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--surface-2);border:1px solid var(--border);font-size:18px}

/* ---------- login ---------- */
.auth{min-height:100vh;display:grid;place-items:center;padding:var(--s6);position:relative;z-index:1}
.auth-card{width:100%;max-width:400px;background:linear-gradient(180deg,var(--surface),var(--ground));
  border:1px solid var(--border);border-radius:18px;padding:36px 30px;box-shadow:0 30px 80px rgba(0,0,0,.55)}
.brandmark{width:64px;height:64px;margin:0 auto 16px;display:block;filter:drop-shadow(0 6px 18px rgba(108,92,231,.5))}
.wordmark{font-family:var(--display);font-weight:700;font-size:26px;letter-spacing:.22em;text-align:center;margin:0}
.wordmark .flame-txt{background:linear-gradient(180deg,#fff,var(--accent-bright));-webkit-background-clip:text;background-clip:text;color:transparent}
.tagline{text-align:center;color:var(--muted);font-size:13px;margin:8px 0 26px}
.auth-foot{text-align:center;color:var(--faint);font-size:11px;margin-top:18px;letter-spacing:.04em}

/* ---------- app shell ---------- */
.app{display:grid;grid-template-columns:var(--sidebar) 1fr;min-height:100vh;position:relative;z-index:1}
.sidebar{position:sticky;top:0;height:100vh;display:flex;flex-direction:column;
  background:var(--surface);border-right:1px solid var(--border-soft);padding:18px 14px}
.side-brand{display:flex;align-items:center;gap:10px;padding:6px 8px 18px}
.side-brand img{width:30px;height:30px}
.side-brand b{font-family:var(--display);font-weight:700;letter-spacing:.16em;font-size:15px}
.side-nav{display:flex;flex-direction:column;gap:2px;margin-top:6px}
.nav-item{display:flex;align-items:center;gap:11px;height:40px;padding:0 12px;border-radius:10px;color:var(--muted);
  font-weight:500;position:relative;transition:background .14s,color .14s}
.nav-item svg{width:16px;height:16px;flex:none;opacity:.85}
.nav-item:hover{background:var(--surface-2);color:var(--text)}
.nav-item.is-active{background:rgba(108,92,231,.14);color:#fff}
.nav-item.is-active::before{content:"";position:absolute;left:-14px;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--flame-2),var(--flame-3))}
.nav-tag{margin-left:auto;font-size:10px;font-weight:700;color:var(--accent-bright);background:rgba(108,92,231,.14);border-radius:6px;padding:2px 6px}
.side-foot{margin-top:auto;display:flex;align-items:center;gap:10px;padding:12px 8px 4px;border-top:1px solid var(--border-soft)}

.main{min-width:0;display:flex;flex-direction:column}
.topbar{height:64px;display:flex;align-items:center;gap:var(--s4);padding:0 var(--s6);
  border-bottom:1px solid var(--border-soft);position:sticky;top:0;background:rgba(11,9,20,.72);backdrop-filter:blur(10px);z-index:5}
.topbar .search{flex:1;max-width:360px;height:38px}
.content{padding:var(--s6);max-width:1120px;width:100%}

.avatar{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-weight:700;font-size:13px;color:#fff;
  background:linear-gradient(135deg,var(--accent),var(--accent-deep))}
.rank{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:600;color:var(--accent-bright)}
.rank .dot{width:7px;height:7px;border-radius:50%;background:var(--accent-bright);box-shadow:0 0 8px var(--accent-bright)}

/* progress bar */
.bar{height:6px;border-radius:99px;background:var(--surface-2);overflow:hidden}
.bar>span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--flame-1),var(--flame-2),var(--flame-3))}

/* layout helpers */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s4)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--s4)}
.row{display:flex;align-items:center;gap:var(--s3)}
.between{display:flex;align-items:center;justify-content:space-between;gap:var(--s3)}
.stack{display:flex;flex-direction:column}
.wrap{display:flex;flex-wrap:wrap;gap:var(--s2)}
.mt2{margin-top:var(--s2)}.mt4{margin-top:var(--s4)}.mt6{margin-top:var(--s6)}
.sep{height:1px;background:var(--border-soft);margin:var(--s4) 0}

/* list rows (knowledge / tasks) */
.list{display:flex;flex-direction:column;gap:var(--s2)}
.item{display:flex;align-items:center;gap:var(--s3);padding:12px 14px;border-radius:10px;border:1px solid var(--border-soft);
  background:var(--surface);transition:border-color .15s,background .15s}
.item:hover{border-color:var(--accent);background:var(--surface-2)}
.item .credit{margin-left:auto;font-size:12px;color:var(--faint)}

/* empty / designed state */
.empty{display:grid;place-items:center;text-align:center;gap:10px;padding:40px 20px;color:var(--muted);
  border:1px dashed var(--border);border-radius:var(--r-panel)}

/* responsive — compact app stacks on phone */
.burger{display:none}
.nav-backdrop{display:none}
@media(max-width:860px){
  .app{grid-template-columns:1fr}
  .sidebar{position:fixed;left:-262px;transition:left .22s ease;z-index:50;box-shadow:0 20px 60px rgba(0,0,0,.6)}
  .sidebar.open{left:0}
  .burger{display:grid}
  .nav-backdrop{position:fixed;inset:0;z-index:49;background:rgba(6,4,16,.6);backdrop-filter:blur(2px)}
  .nav-backdrop[hidden]{display:none}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .content{padding:var(--s4)}
  .topbar{padding:0 var(--s4)}
  .topbar .search{max-width:none}
}

/* form error + icon button */
.form-err{color:var(--danger);font-size:12px;min-height:16px;margin:-4px 0 10px}
.btn-icon{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:transparent;
  border:1px solid var(--border-soft);color:var(--muted);cursor:pointer;transition:border-color .15s,color .15s}
.btn-icon:hover{border-color:var(--accent);color:var(--text)}

/* knowledge view */
.form-ok{color:var(--success);font-size:12px;margin:-4px 0 10px}
.chip-danger{color:var(--danger);background:rgba(255,91,106,.1);border-color:rgba(255,91,106,.28)}
select.input{appearance:none;-webkit-appearance:none;cursor:pointer;padding-right:34px;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239d99c4' stroke-width='2'><path d='M6 9l6 6 6-6'/></svg>");
  background-repeat:no-repeat;background-position:right 12px center}
select.input option{background:var(--surface);color:var(--text)}
.kb-card p{font-size:13px;line-height:1.55;max-height:132px;overflow:hidden}
.kb-card b{letter-spacing:-0.01em}

/* reactive cursor pattern — dots light up around the pointer */
.spotlight, .hoverable, [data-tilt]{isolation:isolate}
.spotlight::after, [data-tilt]::after{
  content:"";position:absolute;inset:0;z-index:-1;border-radius:inherit;pointer-events:none;
  background-image:radial-gradient(circle, rgba(150,138,255,.45) 1px, transparent 1.6px);
  background-size:20px 20px;
  -webkit-mask-image:radial-gradient(150px circle at var(--mx,-300px) var(--my,-300px), #000, transparent 72%);
  mask-image:radial-gradient(150px circle at var(--mx,-300px) var(--my,-300px), #000, transparent 72%);
  opacity:.8;transition:opacity .3s}
/* stronger glow follows the cursor on spotlight surfaces */
.spotlight::before{background:radial-gradient(340px circle at var(--mx,50%) var(--my,-30%), rgba(123,110,246,.22), transparent 62%)}

/* modal */
.modal-backdrop{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:20px;
  background:rgba(6,4,16,.66);backdrop-filter:blur(6px);animation:fadein .2s ease}
.modal-backdrop[hidden]{display:none}
.modal{width:100%;max-width:520px;max-height:88vh;overflow:auto;
  background:linear-gradient(180deg,var(--surface),var(--ground));border:1px solid var(--border);
  border-radius:16px;padding:24px 26px;box-shadow:0 30px 80px rgba(0,0,0,.6);animation:pop .22s ease}
@keyframes fadein{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:translateY(12px) scale(.985)}to{opacity:1;transform:none}}

/* code vault */
.code-card{display:block}
.code-block{border:1px solid var(--border-soft);border-radius:10px;overflow:auto;max-height:360px;background:#0d1117}
.code-block code.hljs,.code-block code{font-family:var(--mono);font-size:12.5px;line-height:1.55;padding:14px 16px;display:block;background:transparent}
textarea.mono{font-family:var(--mono);line-height:1.5}

/* tasks + rewards */
.task-card,.reward-card{display:block}
.hint-box{margin-top:10px;padding:12px 14px;border-radius:10px;background:var(--surface-2);border:1px solid var(--border-soft);font-size:13px;color:var(--muted);line-height:1.55;white-space:pre-wrap}

/* loading skeletons */
.skel{position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--r-card)}
.skel::after{content:"";position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(90deg,transparent,rgba(255,255,255,.06),transparent);animation:shimmer 1.3s infinite}
@keyframes shimmer{100%{transform:translateX(100%)}}
.skel-row{height:52px}
.skel-row + .skel-row{margin-top:8px}
.skel-card{height:116px}