/* ============================================================
   Bharat Demand Acquirer — full-screen chat app
   Theme matched to bharataiseva.com (navy / gold / tricolor)
   ============================================================ */
:root{
  --navy:#0b1f4b; --navy-deep:#07173a; --navy-soft:#122c63;
  --gold:#d4a017; --gold-light:#f0c14b; --saffron:#c0392b; --green:#1a6b34;
  --tri-saffron:#ff9933; --tri-green:#138808;
  --ink:#1d2433; --muted:#5a6478; --line:#e6eaf3;
  --bg:#ffffff; --bg-soft:#f6f8fc; --bg-chat:#f9fafd;
  --font:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
  --sidebar-w:270px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg-chat);-webkit-font-smoothing:antialiased;overflow:hidden}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}

.app{display:flex;height:100vh;width:100%}

/* ---------------- Sidebar ---------------- */
.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--navy-deep);color:#c8d3ea;
  display:flex;flex-direction:column;padding:16px 14px;transition:transform .25s ease;z-index:40}
.sb-head{padding:4px 6px 14px}
.sb-brand{display:flex;align-items:center;gap:11px;font-weight:900;color:#fff;font-size:1.12rem;line-height:1.05}
.sb-brand small{color:var(--gold-light);font-weight:700;font-size:.82rem}
.sb-brand .badge{width:38px;height:38px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(135deg,var(--tri-saffron),#fff 55%,var(--tri-green));
  display:grid;place-items:center;font-size:1.2rem;box-shadow:0 4px 12px rgba(0,0,0,.3)}
.new-chat{display:flex;align-items:center;gap:9px;width:100%;background:linear-gradient(120deg,var(--gold),var(--gold-light));
  color:var(--navy-deep);border:0;border-radius:11px;padding:12px 15px;font-weight:800;font-size:.94rem;
  transition:transform .15s,box-shadow .15s}
.new-chat span{font-size:1.2rem;line-height:1}
.new-chat:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(212,160,23,.4)}
.sb-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:#7d8bab;margin:20px 8px 8px;font-weight:700}
.sb-convos{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:3px;margin:0 -4px;padding:0 4px}
.sb-convos::-webkit-scrollbar{width:6px}.sb-convos::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12);border-radius:3px}
.convo-item{display:flex;align-items:center;gap:9px;padding:10px 12px;border-radius:9px;color:#b9c5e0;
  font-size:.88rem;cursor:pointer;transition:background .15s;white-space:nowrap;overflow:hidden}
.convo-item .ct{overflow:hidden;text-overflow:ellipsis;flex:1}
.convo-item:hover{background:rgba(255,255,255,.06);color:#fff}
.convo-item.active{background:rgba(212,160,23,.16);color:#fff}
.convo-item .del{opacity:0;color:#8b9bc0;font-size:.95rem;padding:2px 4px;border:0;background:none;transition:opacity .15s}
.convo-item:hover .del{opacity:1}
.convo-item .del:hover{color:var(--saffron)}
.sb-empty{color:#6d7ca0;font-size:.82rem;padding:8px 12px;font-style:italic}
.sb-foot{border-top:1px solid rgba(255,255,255,.08);padding-top:14px;margin-top:10px}
.sb-link{display:block;padding:10px 12px;border-radius:9px;color:#c8d3ea;font-weight:600;font-size:.9rem;transition:background .15s}
.sb-link:hover{background:rgba(255,255,255,.06);color:#fff}
.sb-fine{color:#6d7ca0;font-size:.76rem;padding:10px 12px 2px;line-height:1.4}
.overlay{display:none;position:fixed;inset:0;background:rgba(7,23,58,.5);z-index:35}

/* ---------------- Main ---------------- */
.main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg-chat)}
.topbar{height:60px;flex-shrink:0;display:flex;align-items:center;gap:14px;padding:0 20px;
  border-bottom:1px solid var(--line);background:rgba(255,255,255,.85);backdrop-filter:blur(8px)}
.topbar .tb-title{flex:1;display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:1.02rem}
.tb-badge{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--tri-saffron),#fff 55%,var(--tri-green));display:grid;place-items:center;font-size:.95rem}
.tb-status{font-size:.74rem;color:var(--green);font-weight:700;margin-left:2px}
.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--navy);
  font-size:1.1rem;display:grid;place-items:center;transition:background .15s}
.icon-btn:hover{background:var(--bg-soft)}
#menuBtn{display:none}

/* ---------------- Thread ---------------- */
.thread{flex:1;overflow-y:auto;scroll-behavior:smooth}
.thread::-webkit-scrollbar{width:9px}.thread::-webkit-scrollbar-thumb{background:#d6ddec;border-radius:5px}

/* Welcome / empty state */
.welcome{max-width:760px;margin:0 auto;padding:8vh 24px 40px;text-align:center;display:flex;flex-direction:column;align-items:center}
.w-badge{width:72px;height:72px;border-radius:20px;background:linear-gradient(135deg,var(--tri-saffron),#fff 55%,var(--tri-green));
  display:grid;place-items:center;font-size:2.1rem;box-shadow:0 14px 34px rgba(7,23,58,.16);margin-bottom:20px}
.welcome h1{font-size:clamp(1.6rem,3.6vw,2.2rem);color:var(--navy);letter-spacing:-.02em}
.w-desc{color:var(--muted);max-width:600px;margin:12px auto 30px;font-size:1.02rem;line-height:1.6}
.suggests{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%;max-width:640px}
.sg{text-align:left;background:#fff;border:1px solid var(--line);border-radius:14px;padding:15px 17px;transition:all .18s;display:flex;flex-direction:column;gap:4px}
.sg:hover{border-color:var(--gold);box-shadow:0 10px 26px rgba(7,23,58,.08);transform:translateY(-2px)}
.sg b{color:var(--navy);font-size:.95rem}
.sg span{color:var(--muted);font-size:.86rem;line-height:1.4}

/* Messages */
.messages{max-width:800px;margin:0 auto;padding:26px 24px 30px;display:flex;flex-direction:column;gap:26px}
.row{display:flex;gap:15px;align-items:flex-start;animation:rise .3s ease}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.row .avatar{width:36px;height:36px;border-radius:10px;flex-shrink:0;display:grid;place-items:center;font-size:.95rem;font-weight:800}
.row.user .avatar{background:var(--navy);color:#fff}
.row.bot .avatar{background:linear-gradient(135deg,var(--tri-saffron),#fff 55%,var(--tri-green))}
.row .who{font-weight:800;font-size:.86rem;color:var(--navy);margin-bottom:5px}
.row.user .who{color:var(--ink)}
.row .body{flex:1;min-width:0}
.bubble{font-size:.97rem;line-height:1.68;color:var(--ink);word-wrap:break-word;overflow-wrap:break-word}
.bubble p{margin:.55em 0}.bubble p:first-child{margin-top:0}.bubble p:last-child{margin-bottom:0}
.bubble h1,.bubble h2,.bubble h3{color:var(--navy);margin:.8em 0 .35em;line-height:1.3}
.bubble h1{font-size:1.2rem}.bubble h2{font-size:1.1rem}.bubble h3{font-size:1rem}
.bubble ul,.bubble ol{margin:.5em 0 .5em 1.3em}.bubble li{margin:.25em 0}
.bubble strong{color:var(--navy);font-weight:700}
.bubble code{background:rgba(11,31,75,.07);padding:2px 6px;border-radius:5px;font-size:.88em}
.bubble table{border-collapse:collapse;width:100%;margin:.7em 0;font-size:.85rem;display:block;overflow-x:auto}
.bubble th,.bubble td{border:1px solid var(--line);padding:7px 10px;text-align:left}
.bubble th{background:var(--bg-soft);color:var(--navy);font-weight:700}
.bubble a{color:var(--gold);text-decoration:underline}
.src{margin-top:12px;font-size:.76rem;color:var(--muted);border-top:1px dashed var(--line);padding-top:8px}
.src b{color:var(--navy)}

/* Typing */
.typing{display:flex;gap:6px;padding:6px 0}
.typing span{width:9px;height:9px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite}
.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.25}30%{opacity:1}}

/* ---------------- Composer ---------------- */
.composer{flex-shrink:0;padding:12px 24px 16px;background:linear-gradient(180deg,rgba(249,250,253,0),var(--bg-chat) 30%)}
.composer-inner{max-width:800px;margin:0 auto;display:flex;align-items:flex-end;gap:8px;background:#fff;
  border:1.5px solid var(--line);border-radius:18px;padding:8px;box-shadow:0 8px 30px rgba(7,23,58,.08);
  transition:border-color .15s,box-shadow .15s}
.composer-inner:focus-within{border-color:var(--gold);box-shadow:0 10px 32px rgba(212,160,23,.16)}
.mode-btn{width:44px;height:44px;flex-shrink:0;border:1px solid var(--line);border-radius:13px;background:#fff;
  font-size:1.15rem;display:grid;place-items:center;transition:all .15s}
.mode-btn:hover{background:var(--bg-soft)}
.mode-btn.active{background:linear-gradient(120deg,var(--saffron),#e05745);border-color:transparent;box-shadow:0 4px 12px rgba(192,57,43,.35)}
.composer textarea{padding-left:6px}
.gen-image{margin-top:4px;border-radius:14px;max-width:100%;border:1px solid var(--line);box-shadow:0 8px 24px rgba(7,23,58,.12)}
.gen-cap{font-size:.82rem;color:var(--muted);margin-top:8px}
.gen-cap a{color:var(--gold);font-weight:700}
.composer textarea{flex:1;border:0;outline:0;resize:none;font-family:inherit;font-size:1rem;line-height:1.5;
  max-height:190px;padding:8px 0;background:transparent;color:var(--ink)}
.send-btn{width:44px;height:44px;flex-shrink:0;border:0;border-radius:13px;font-size:1.15rem;color:var(--navy-deep);
  background:linear-gradient(120deg,var(--gold),var(--gold-light));display:grid;place-items:center;transition:transform .15s,opacity .15s}
.send-btn:hover{transform:scale(1.06)}
.send-btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.composer-note{max-width:800px;margin:9px auto 0;text-align:center;font-size:.76rem;color:var(--muted)}

/* ---------------- Responsive ---------------- */
@media(max-width:820px){
  .sidebar{position:fixed;top:0;bottom:0;left:0;transform:translateX(-100%);box-shadow:6px 0 30px rgba(0,0,0,.25)}
  .sidebar.open{transform:none}
  .overlay.show{display:block}
  #menuBtn{display:grid}
  .suggests{grid-template-columns:1fr}
  .messages{padding:20px 16px}
  .composer{padding:10px 14px 14px}
}