/* ============================================================
   AiChat — Unified UI shell (Fantasy violet theme)
   Shared design system for every local static page.
   Look adopted from the approved Fantasy Chat design:
   deep violet canvas, DM Sans, lucide icons, glowing cards,
   profile + trending sidebar, gradient (purple→fuchsia) accents.
   ============================================================ */
@import url("https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&display=swap");

:root{
  color-scheme:dark;
  --bg:#0a0514;--bg2:#0d0720;
  --panel:#13082a;--panel2:#1a0f2e;       /* card / input surfaces */
  --line:rgba(139,92,246,.22);            /* default border */
  --line-soft:rgba(139,92,246,.14);       /* subtle border */
  --divider:rgba(88,28,135,.34);          /* section dividers */
  --muted:#a78bfa;--muted2:#c4b5fd;       /* violet-400 / violet-300 */
  --text:#f3e8ff;                         /* near-white violet */
  --accent:#7c3aed;--accent2:#d946ef;     /* gradient violet → fuchsia */
  --accent-lite:#a855f7;                  /* purple-500 highlight */
  --accent-soft:rgba(139,92,246,.16);
  --glow:rgba(139,92,246,.20);
  --gold:#facc15;--green:#34d399;
  --radius:16px;--radius-sm:11px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;color:var(--text);
  font:15px/1.5 "DM Sans","Segoe UI",Tahoma,Arial,sans-serif;
  background:
    radial-gradient(1100px 620px at 84% -10%,rgba(217,70,239,.10),transparent 60%),
    radial-gradient(900px 600px at -8% 6%,rgba(124,58,237,.12),transparent 55%),
    var(--bg);
  background-attachment:fixed;
}
a{text-decoration:none;color:inherit}
button,input,select,textarea{font:inherit}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#3a1f63;border-radius:999px}
::-webkit-scrollbar-track{background:transparent}

/* ---- App grid ---- */
.app{min-height:100vh;display:grid;grid-template-columns:256px 1fr}
.main{min-width:0;display:flex;flex-direction:column}

/* ---- Sidebar ---- */
.side{
  background:var(--bg2);
  border-right:1px solid var(--divider);
  padding:16px 12px;display:flex;flex-direction:column;
  position:sticky;top:0;height:100vh;overflow-y:auto;
}
.brand{
  display:flex;align-items:center;gap:9px;margin:4px 6px 14px;
  font-size:19px;font-weight:800;letter-spacing:.2px;color:#fff;
}
.brand .brand-logo{
  width:32px;height:32px;border-radius:9px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  box-shadow:0 6px 16px rgba(124,58,237,.4);
}
.brand .brand-logo svg{width:17px;height:17px;color:#fff}

/* profile card */
.user{
  display:flex;align-items:center;gap:11px;padding:12px;margin-bottom:8px;
  border-bottom:1px solid var(--divider);
}
.user .avatar{
  width:44px;height:44px;border-radius:50%;object-fit:cover;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#fff;font-weight:800;font-size:17px;
  box-shadow:0 0 0 2px rgba(168,85,247,.5);
}
.user .u-meta{min-width:0;flex:1}
.user .u-name{font-weight:700;font-size:15px;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user small{display:flex;align-items:center;gap:5px;color:var(--green);font-size:11px;margin-top:1px}
.user small.offline{color:var(--muted)}
.user .status-dot{width:7px;height:7px;border-radius:50%;background:currentColor;display:inline-block}
.user .u-coins{display:flex;align-items:center;gap:5px;margin-top:6px;color:var(--gold);font-size:12px;font-weight:600}
.user .u-coins svg{width:14px;height:14px;color:var(--gold)}

/* coins chip (used by some pages / sign-in) */
.coins-chip{
  display:flex;align-items:center;gap:8px;margin:4px 6px 12px;padding:9px 12px;
  border-radius:12px;border:1px solid rgba(250,204,21,.32);
  background:linear-gradient(135deg,rgba(250,204,21,.12),rgba(217,70,239,.10));
  color:#fde68a;font-size:13px;transition:border-color .15s,transform .15s;
}
.coins-chip:hover{border-color:rgba(250,204,21,.6);transform:translateY(-1px)}
.coins-chip .coin-ico{font-size:15px}
.coins-chip strong{color:#fff;font-size:15px;font-weight:800}
.coins-chip .coin-label{color:var(--muted);margin-left:auto;font-size:11px;text-transform:uppercase;letter-spacing:.4px}

/* nav */
.nav{display:grid;gap:2px;padding:4px 2px}
.nav a{
  display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:10px;
  color:var(--muted2);font-weight:500;font-size:14px;
  border-left:3px solid transparent;transition:background .18s,color .18s,border-color .18s;
}
.nav a .nav-icon{width:18px;height:18px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;font-size:16px}
.nav a .nav-icon svg{width:18px;height:18px;color:var(--accent-lite)}
/* Lucide icons render as <i data-lucide="name">EMOJI</i> and are swapped for an inline <svg>
   once the lucide script loads. Hide the emoji fallback until the svg exists so the nav does
   not flash emoji -> svg on every page load. If lucide never loads (offline / CDN blocked),
   shell.js adds .lucide-unavailable to <html> to reveal the emoji fallbacks. The box keeps its
   size while hidden, so there is no layout shift either way. */
i[data-lucide]:not(:has(svg)){visibility:hidden}
.lucide-unavailable i[data-lucide]:not(:has(svg)){visibility:visible}
.nav a:hover{background:rgba(139,92,246,.15);color:#fff}
.nav a.active{background:rgba(139,92,246,.20);color:#fff;border-left-color:var(--accent)}
.nav a.active .nav-icon svg{color:#c084fc}

/* trending */
.trending{margin-top:10px;padding:14px 8px 4px;border-top:1px solid var(--divider)}
.trending h4{margin:0 0 10px;padding:0 4px;font-size:11px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;color:var(--muted)}
.trend-item{display:flex;align-items:center;gap:9px;padding:7px;border-radius:10px;cursor:pointer;transition:background .15s}
.trend-item:hover{background:rgba(139,92,246,.12)}
.trend-item img{width:32px;height:32px;border-radius:50%;object-fit:cover;background:#2a1650;flex-shrink:0}
.trend-item .t-meta{min-width:0;flex:1}
.trend-item .t-name{font-size:12px;font-weight:500;color:#e9d5ff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.trend-item .t-count{font-size:10px;color:rgba(167,139,250,.6)}

/* create button */
.side-create{margin:14px 6px 6px;padding-top:14px;border-top:1px solid var(--divider)}
.side-create .btn{width:100%}

.foot{margin-top:auto;display:grid;gap:7px;color:var(--muted);font-size:12px;padding:14px 8px 4px;border-top:1px solid var(--divider)}
.foot a:hover{color:#fff}

/* ---- Chat sidebar mode: icon rail + recent chats panel ---- */
.app.chat-shell{grid-template-columns:374px 1fr}
.side.side-chat-mode{
  padding:0;display:grid;grid-template-columns:74px 1fr;overflow:hidden;
  background:var(--bg2);border-right:1px solid var(--divider);
}
.chat-rail{
  min-width:0;height:100vh;padding:14px 0 12px;display:flex;flex-direction:column;align-items:center;gap:14px;
  background:var(--bg2);border-right:1px solid var(--divider);
}
.rail-logo,.rail-link{
  width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  color:var(--muted2);transition:background .16s,color .16s,border-color .16s,transform .16s;
}
.rail-logo{
  color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent2));border:1px solid rgba(168,85,247,.38);
  box-shadow:0 6px 16px rgba(124,58,237,.34);
}
.rail-logo svg,.rail-link svg{width:20px;height:20px}
.rail-avatar{
  width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;overflow:hidden;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-weight:800;font-size:13px;
  box-shadow:0 0 0 2px rgba(168,85,247,.5);
}
.rail-nav{width:100%;display:flex;flex-direction:column;align-items:center;gap:6px;padding-top:4px}
.rail-link:hover{background:rgba(139,92,246,.14);color:#fff;transform:translateY(-1px)}
.rail-link.active{background:rgba(139,92,246,.20);color:#c084fc}
.rail-foot{margin-top:auto;width:100%;display:flex;flex-direction:column;align-items:center;gap:6px;padding-top:12px;border-top:1px solid var(--divider)}
.rail-foot-link{width:32px;height:32px;color:var(--muted)}
.rail-foot-link svg{width:16px;height:16px}
.recent-chat-panel{
  min-width:0;height:100vh;display:flex;flex-direction:column;padding:15px 16px 18px;
  background:var(--bg2);color:#fff;overflow:hidden;
}
.recent-chat-panel h2{
  margin:0 0 18px;color:#fff;font-size:16px;font-weight:800;letter-spacing:0;
}
.recent-chat-list{display:grid;gap:8px;overflow:auto;padding-right:2px}
.recent-chat-row-wrap{position:relative;display:grid;grid-template-columns:1fr 28px;align-items:center;gap:4px}
.recent-chat-row{
  display:flex;align-items:center;gap:10px;min-width:0;padding:10px 9px;border-radius:8px;
  border:1px solid transparent;color:#f5efff;transition:background .15s,border-color .15s;
}
.recent-chat-row:hover{background:rgba(139,92,246,.14);border-color:rgba(139,92,246,.25)}
.recent-chat-row img{width:40px;height:40px;border-radius:50%;object-fit:cover;flex-shrink:0;background:#2b1a61}
.recent-chat-meta{min-width:0;display:grid;gap:2px}
.recent-chat-meta strong{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#fff}
.recent-chat-meta span{font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.recent-chat-more,.recent-chat-delete{
  width:26px;height:26px;border:1px solid transparent;border-radius:999px;background:transparent;
  display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--muted);font-weight:800;line-height:1;
}
.recent-chat-more:hover{background:rgba(139,92,246,.16);border-color:var(--line);color:#fff}
.recent-chat-delete{display:none;color:#f87171}
.recent-chat-delete svg{width:14px;height:14px;color:#f87171}
.recent-chat-delete:hover{background:rgba(248,113,113,.14);border-color:rgba(248,113,113,.34)}
.recent-chat-row-wrap.show-delete .recent-chat-more{display:none}
.recent-chat-row-wrap.show-delete .recent-chat-delete{display:flex}
.recent-chat-empty{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  color:#e9d5ff;font-weight:800;font-size:16px;line-height:1.35;padding:0 18px;
}
.recent-chat-empty .empty-icon{
  width:84px;height:84px;margin-bottom:22px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  color:#13082a;background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);
}
.recent-chat-empty .empty-icon svg{width:42px;height:42px;color:#090316}
.recent-chat-empty span{display:block;margin-top:3px;color:#c084fc}

/* ---- Top bar ---- */
.top{
  min-height:64px;border-bottom:1px solid var(--divider);
  display:flex;gap:12px;align-items:center;flex-wrap:wrap;padding:12px 24px;
  background:rgba(10,5,20,.9);backdrop-filter:blur(10px);position:sticky;top:0;z-index:3;
}
.top h1{font-size:20px;margin:0;white-space:nowrap;font-weight:700;color:#fff}
.top-spacer{flex:1}
.top-user{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:14px}
.top-user .top-coins{
  display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border-radius:999px;
  border:1px solid rgba(250,204,21,.32);background:rgba(250,204,21,.10);color:#fde68a;font-weight:700;font-size:13px;
}
.top-user .top-coins strong{color:#fff}
.top-user .top-avatar{
  width:34px;height:34px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:14px;overflow:hidden;
  box-shadow:0 0 0 2px rgba(168,85,247,.45);
}
.top-user .top-avatar img{width:100%;height:100%;object-fit:cover}

/* ---- Common inputs ---- */
.search{
  background:var(--panel2);border:1px solid rgba(107,33,168,.4);border-radius:12px;padding:11px 16px;color:var(--text);
  transition:border-color .15s,box-shadow .15s;
}
.search::placeholder{color:rgba(167,139,250,.6)}
.search:focus{outline:none;border-color:var(--accent-lite);box-shadow:0 0 0 2px rgba(139,92,246,.5)}
.select{background:var(--panel2);border:1px solid rgba(107,33,168,.4);border-radius:11px;padding:10px 12px;color:var(--text);cursor:pointer;transition:border-color .15s}
.select:hover{border-color:var(--accent-lite)}
.select:focus{outline:none;border-color:var(--accent)}

/* ---- Tabs (category pills) ---- */
.tabs{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}
.tab{
  padding:7px 16px;border-radius:999px;font-size:13px;font-weight:600;white-space:nowrap;cursor:pointer;
  border:none;background:#1f1135;color:var(--muted);transition:background .18s,color .18s,transform .18s;
}
.tab:hover{background:#2d1b4e;color:#fff}
.tab.active{background:var(--accent);color:#fff;box-shadow:0 4px 14px rgba(124,58,237,.4)}

/* ---- Content + cards ---- */
.content{padding:24px;max-width:none;width:100%}
.intro{margin-bottom:22px}
.intro h2{margin:0 0 6px;font-size:23px;font-weight:800;color:#f3e8ff}
.intro p{margin:0;color:var(--muted);font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(244px,1fr));gap:16px}
.card{
  background:var(--panel);
  border:1px solid var(--line-soft);border-radius:var(--radius);padding:18px;
  transition:border-color .3s,transform .3s,box-shadow .3s;
}
.card.hoverable:hover{border-color:rgba(139,92,246,.6);transform:translateY(-2px);box-shadow:0 0 20px var(--glow)}
.card h3{margin:0 0 8px;font-size:15px;font-weight:700;color:#fff}
.card p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.badge{display:inline-flex;margin-top:12px;border:1px solid var(--accent-soft);border-radius:999px;padding:3px 11px;color:#e9d5ff;font-size:12px;background:rgba(139,92,246,.08)}

/* ---- Buttons ---- */
.btn,.action{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:10px 18px;border-radius:var(--radius-sm);font-weight:600;font-size:14px;cursor:pointer;border:1px solid transparent;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;
  box-shadow:0 6px 18px rgba(124,58,237,.3);transition:transform .15s,box-shadow .15s,opacity .15s,border-color .15s;
}
.btn:hover,.action:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(124,58,237,.45)}
.btn:disabled,.action:disabled{opacity:.45;cursor:default;transform:none;box-shadow:none}
.btn-secondary,.action-secondary{
  background:var(--panel2);border-color:var(--line);color:var(--muted2);box-shadow:none;
}
.btn-secondary:hover,.action-secondary:hover{border-color:var(--accent-lite);color:#fff;box-shadow:none;transform:translateY(-1px)}

/* ---- Chips / stats ---- */
.stat-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.stat-chip{background:var(--panel2);border:1px solid var(--line);border-radius:11px;padding:9px 13px;font-size:12px;color:var(--muted)}
.stat-chip strong{display:block;font-size:18px;color:#fff;margin-bottom:2px}

/* ---- Empty state ---- */
.empty{padding:48px;text-align:center;color:var(--muted);border:1px solid var(--line-soft);border-radius:var(--radius);background:var(--panel)}

/* ---- Modal ---- */
.modal[hidden]{display:none}
.modal{position:fixed;inset:0;background:rgba(5,2,12,.78);backdrop-filter:blur(4px);display:grid;place-items:center;padding:18px;z-index:5}
.dialog{width:min(760px,100%);max-height:90vh;overflow:auto;background:var(--panel2);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 24px 60px rgba(0,0,0,.6)}

/* ---- Responsive ---- */
@media(max-width:860px){
  .app{grid-template-columns:1fr}
  .app.chat-shell{grid-template-columns:1fr}
  .side{display:none}
  .top{padding:14px 16px}
  .content{padding:18px 16px}
  .grid{grid-template-columns:1fr}
}