:root {
  --bg: #0f172a;
  --panel: #111827;
  --panel-2: #182235;
  --border: rgba(255,255,255,0.08);
  --text: #f8fafc;
  --muted: #cbd5e1;
  --success: #22c55e;
  --danger: #ef4444;
  --shadow: 0 20px 50px rgba(0,0,0,.25);
  --radius: 24px;
}
*{box-sizing:border-box} html,body{margin:0;padding:0}
body{
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background:
    radial-gradient(circle at top right, rgba(124,58,237,.25), transparent 28%),
    radial-gradient(circle at bottom left, rgba(236,72,153,.20), transparent 30%),
    linear-gradient(180deg, #08101f 0%, #0f172a 100%);
  color:var(--text);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
input, textarea, select, button{font:inherit}
input, textarea, select{
  width:100%; padding:14px 16px; border-radius:16px; border:1px solid var(--border);
  background:#0b1324; color:var(--text);
}
textarea{resize:vertical}
button{cursor:pointer;border:none}
label span{display:block;margin-bottom:8px;color:var(--muted);font-size:.95rem}
.app-shell{display:grid;grid-template-columns:280px 1fr;min-height:100vh}
.sidebar{padding:24px;border-right:1px solid var(--border);background:rgba(8,15,30,.72);backdrop-filter: blur(10px)}
.main{padding:28px}
.brand-card,.card,.chat-bubble,.reward-card,.inline-card,.bubble-preview,.mini-stat,.profile-card{
  background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border:1px solid var(--border); box-shadow:var(--shadow);
}
.brand-card{display:flex;align-items:center;gap:14px;padding:18px;border-radius:22px;margin-bottom:22px}
.brand-logo{width:48px;height:48px;border-radius:18px;background:var(--theme);display:grid;place-items:center;font-size:1.4rem;box-shadow:0 10px 30px color-mix(in srgb, var(--theme) 35%, transparent)}
.brand-title{font-weight:800}.brand-sub{font-size:.92rem;color:var(--muted)}
.nav{display:grid;gap:10px}.nav a{padding:14px 16px;border-radius:16px;background:rgba(255,255,255,.03)}.nav a:hover{background:rgba(255,255,255,.07)}
.topbar{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:22px}.topbar h1{margin:4px 0 0;font-size:1.9rem}.page-kicker{color:var(--muted)}
.topbar-right{display:flex;gap:10px;flex-wrap:wrap}.pill{padding:10px 14px;border-radius:999px;background:rgba(255,255,255,.07);border:1px solid var(--border)}.pill.online{outline:1px solid rgba(34,197,94,.45)}
.card{padding:22px;border-radius:var(--radius)}
.grid{display:grid;gap:20px}.two-up{grid-template-columns:1.2fr 1fr;margin-bottom:20px}.chat-grid{grid-template-columns:300px 1fr}
.stack{display:grid;gap:12px}.stack-lg{display:grid;gap:16px}.stats-row,.button-grid,.form-row,.reward-foot{display:flex;gap:12px;flex-wrap:wrap}.button-grid .btn{flex:1 1 180px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:16px;font-weight:700;transition:.18s transform ease, .18s opacity ease}.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg, var(--theme), color-mix(in srgb, var(--theme) 55%, white));color:#fff}
.btn-soft{background:rgba(255,255,255,.07);color:var(--text)} .btn-block{width:100%}
.hero-badge{display:inline-flex;align-items:center;gap:10px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.08);color:#fff;margin-bottom:12px}
.flash{margin-bottom:18px;padding:14px 16px;border-radius:18px}.flash-success{background:rgba(34,197,94,.15);border:1px solid rgba(34,197,94,.25)}.flash-danger{background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.25)}
.login-wrap{display:grid;place-items:center;min-height:calc(100vh - 56px)}.login-card{max-width:520px;width:100%}
.mini-stat{padding:14px 16px;border-radius:18px;min-width:160px}.mini-stat span{display:block;color:var(--muted);font-size:.9rem}.mini-stat strong{font-size:1.2rem}
.theme-dot,.status-dot,.theme-chip{display:inline-block}.theme-dot{width:12px;height:12px;border-radius:50%;margin-right:8px}.status-dot{width:12px;height:12px;border-radius:50%;background:#64748b}.status-dot.online{background:var(--success);box-shadow:0 0 0 6px rgba(34,197,94,.15)}
.person-row{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border-radius:16px;background:rgba(255,255,255,.04)}.person-link.active{outline:2px solid color-mix(in srgb, var(--theme) 55%, white)}
.muted{color:var(--muted)}
.bubble-preview,.inline-card,.reward-card{padding:14px 16px;border-radius:18px}.inline-card{display:flex;gap:12px;align-items:center;justify-content:space-between}
.reward-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.chat-card{display:grid;gap:16px}.chat-stream{display:grid;gap:12px;max-height:58vh;overflow:auto;padding-right:8px}.chat-bubble{padding:14px 16px;border-radius:20px;max-width:720px}.chat-bubble.mine{margin-left:auto;background:linear-gradient(135deg, color-mix(in srgb, var(--theme) 20%, rgba(255,255,255,.06)), rgba(255,255,255,.03))}.chat-meta{font-size:.8rem;color:var(--muted);margin-bottom:6px}.chat-image{border-radius:18px;margin-top:10px;max-height:260px;object-fit:cover}.chat-form{margin-top:8px}
.profile-card{padding:18px;border-radius:22px;text-align:center}.avatar-large{width:120px;height:120px;border-radius:30px;margin:0 auto 12px;border:4px solid var(--theme);overflow:hidden;display:grid;place-items:center;font-size:2rem;font-weight:800;background:rgba(255,255,255,.08)}.avatar-large img{width:100%;height:100%;object-fit:cover}.theme-chip{width:100%;height:26px;border-radius:999px;margin-top:12px}
.choice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}.choice-pill input{display:none}.choice-pill span{display:block;padding:16px;border-radius:18px;background:rgba(255,255,255,.06);text-align:center}.choice-pill input:checked + span{outline:2px solid color-mix(in srgb, var(--theme) 60%, white);background:rgba(255,255,255,.12)}
.placeholder-box,.success-panel{padding:18px;border-radius:18px;background:rgba(255,255,255,.05);border:1px dashed rgba(255,255,255,.18)}
.challenge-type{color:color-mix(in srgb, var(--theme) 60%, white);font-weight:700}
@media (max-width: 980px){.app-shell{grid-template-columns:1fr}.sidebar{border-right:none;border-bottom:1px solid var(--border)}.two-up,.chat-grid{grid-template-columns:1fr}.main{padding:20px}.topbar{flex-direction:column;align-items:flex-start}}