/* Bangla AI — premium dark green-charcoal theme, emerald + gold */
:root{
  --bg:#0b1512;
  --bg-2:#0f1f1a;
  --surface:#14261f;
  --surface-2:#1a2f27;
  --border:#234034;
  --text:#eef7f2;
  --muted:#9db8ab;
  --emerald:#10b981;
  --emerald-dark:#059669;
  --gold:#d4af37;
  --gold-soft:#e8c96a;
  --danger:#f87171;
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:"Hind Siliguri","Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  overscroll-behavior:none;
}
.hidden{display:none !important}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font-family:inherit}
.gold{color:var(--gold-soft)}

#app{max-width:520px;margin:0 auto;height:100dvh;position:relative;background:radial-gradient(120% 60% at 50% 0%,#123126 0%,var(--bg) 55%);overflow:hidden}

/* ---------- views ---------- */
.view{display:none;height:100%;flex-direction:column}
.view.active{display:flex}

/* ---------- logo ---------- */
.logo-mark{
  display:flex;align-items:center;justify-content:center;
  font-family:"Inter",sans-serif;font-weight:800;color:#fff;
  background:linear-gradient(145deg,var(--emerald) 0%,var(--emerald-dark) 70%);
  border:2px solid var(--gold);
  border-radius:26%;
  box-shadow:0 0 0 3px rgba(212,175,55,.18),0 8px 24px rgba(0,0,0,.45);
}
.logo-mark.big{width:84px;height:84px;font-size:44px}
.logo-mark.medium{width:60px;height:60px;font-size:32px}
.logo-mark.small{width:34px;height:34px;font-size:18px;border-width:1.5px}
.logo-mark.center{margin:4px auto 10px}
.logo-mark.glow{box-shadow:0 0 34px rgba(16,185,129,.45),0 0 0 3px rgba(212,175,55,.25),0 8px 24px rgba(0,0,0,.45)}

/* ---------- top bar ---------- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:calc(10px + env(safe-area-inset-top)) 14px 10px;gap:8px;flex:none;
}
.topbar.simple{justify-content:flex-start}
.topbar-spacer{width:40px}
.view-title{font-size:19px;font-weight:600;flex:1;text-align:center}
.icon-btn{
  width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--surface);color:var(--text);border:1px solid var(--border);flex:none;
}
.icon-btn:active{background:var(--surface-2)}
.premium-pill{
  background:linear-gradient(135deg,#f3d97b,var(--gold));
  color:#241a02;font-weight:700;font-size:14.5px;
  padding:9px 18px;border-radius:999px;
  box-shadow:0 4px 16px rgba(212,175,55,.35);
}
.premium-pill:active{transform:scale(.97)}

/* ---------- chat ---------- */
.chat-scroll{flex:1;overflow-y:auto;padding:8px 16px 12px;display:flex;flex-direction:column}
.chat-empty{margin:auto;text-align:center;padding:24px 4px;max-width:420px}
.greeting{font-size:27px;line-height:1.35;font-weight:700;margin:18px 0 8px}
.greeting-sub{color:var(--muted);font-size:15.5px;line-height:1.55}
.chips{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin-top:22px}
.chip{
  background:var(--surface);border:1px solid var(--border);color:var(--text);
  padding:10px 15px;border-radius:999px;font-size:14.5px;
}
.chip:active{border-color:var(--emerald);background:var(--surface-2)}

.message-list{display:flex;flex-direction:column;gap:16px;padding-top:6px}
.msg{display:flex;gap:10px;max-width:100%}
.msg .bubble{padding:11px 14px;border-radius:16px;font-size:15.5px;line-height:1.6;white-space:pre-wrap;word-break:break-word}
.msg.user{justify-content:flex-end}
.msg.user .bubble{background:linear-gradient(145deg,var(--emerald),var(--emerald-dark));color:#fff;border-bottom-right-radius:5px;max-width:82%}
.msg.ai .bubble{background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:5px;max-width:88%}
.msg.ai.error .bubble{border-color:var(--danger);color:#fecaca}
.avatar-ai{
  width:30px;height:30px;flex:none;border-radius:9px;display:flex;align-items:center;justify-content:center;
  font-family:"Inter",sans-serif;font-weight:800;font-size:15px;color:#fff;
  background:linear-gradient(145deg,var(--emerald),var(--emerald-dark));border:1.5px solid var(--gold);
}
.typing-row{display:flex;gap:10px;align-items:center;margin-top:16px}
.typing-dots{display:flex;gap:5px;background:var(--surface);border:1px solid var(--border);padding:13px 14px;border-radius:16px;border-bottom-left-radius:5px}
.typing-dots span{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite}
.typing-dots span:nth-child(2){animation-delay:.2s}
.typing-dots span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.25}40%{opacity:1}}

/* ---------- composer ---------- */
.composer-wrap{flex:none;padding:8px 12px calc(10px + env(safe-area-inset-bottom));background:linear-gradient(transparent,var(--bg) 30%)}
.limit-note{
  background:#2a2113;border:1px solid var(--gold);color:var(--gold-soft);
  font-size:14px;line-height:1.5;padding:10px 13px;border-radius:12px;margin-bottom:9px;text-align:center;
}
.composer{
  display:flex;align-items:center;gap:6px;
  background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:6px;
}
.composer input{
  flex:1;background:none;border:none;outline:none;color:var(--text);
  font-size:16px;padding:8px 4px;min-width:0;
}
.composer input::placeholder{color:var(--muted)}
.composer-btn{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--muted);flex:none}
.send-btn{
  width:42px;height:42px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(145deg,var(--emerald),var(--emerald-dark));color:#fff;
  box-shadow:0 4px 14px rgba(16,185,129,.4);
}
.send-btn:active{transform:scale(.94)}
.send-btn:disabled{opacity:.55}
.composer-hint{text-align:center;color:var(--muted);font-size:11.5px;margin-top:8px}

/* ---------- generic pages ---------- */
.page-scroll{flex:1;overflow-y:auto;padding:14px 16px calc(20px + env(safe-area-inset-bottom))}

/* ---------- plans ---------- */
.plan-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px}
.plan-card.premium{border-color:var(--gold);background:linear-gradient(160deg,#1d2b16,#14261f 55%);box-shadow:0 0 24px rgba(212,175,55,.12)}
.plan-head{display:flex;align-items:center;justify-content:space-between}
.plan-head h3{font-size:21px}
.badge{font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px}
.badge.active{background:rgba(16,185,129,.18);color:#34d399;border:1px solid var(--emerald)}
.badge.soon{background:rgba(212,175,55,.15);color:var(--gold-soft);border:1px solid var(--gold)}
.plan-price{color:var(--muted);margin:6px 0 14px;font-size:15px}
.plan-list{list-style:none;display:flex;flex-direction:column;gap:9px;font-size:15px;line-height:1.5;margin-bottom:18px}
.plan-btn{width:100%;padding:13px;border-radius:12px;font-size:15.5px;font-weight:600}
.plan-btn.current{background:var(--surface-2);color:var(--muted)}
.plan-btn.premium-btn{background:linear-gradient(135deg,#f3d97b,var(--gold));color:#241a02}
.plan-btn:disabled{cursor:default;opacity:.92}
.plans-note{color:var(--muted);font-size:14px;line-height:1.6;text-align:center;padding:0 6px}

/* ---------- settings ---------- */
.profile-head{text-align:center;padding:10px 0 20px}
.avatar-wrap{position:relative;width:96px;margin:0 auto 12px}
.avatar-big{
  width:96px;height:96px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-family:"Inter",sans-serif;font-size:34px;font-weight:700;color:#fff;
  background:linear-gradient(145deg,#0e9f6e,#065f46);border:2.5px solid var(--gold);
}
.avatar-edit{
  position:absolute;right:0;bottom:2px;width:28px;height:28px;border-radius:50%;
  background:var(--surface-2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:13px;
}
.profile-head h3{font-size:21px}
.profile-email{color:var(--muted);font-size:14px;margin-top:2px}
.settings-group{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin-bottom:16px}
.setting-row{display:flex;align-items:center;gap:12px;width:100%;padding:15px 16px;font-size:15.5px;text-align:left;border-bottom:1px solid var(--border)}
.setting-row:last-child{border-bottom:none}
.setting-row .s-icon{width:22px;text-align:center;flex:none}
.setting-row .s-label{flex:1}
.setting-row .s-value{color:var(--muted);font-size:14.5px;display:flex;align-items:center;gap:7px}
.setting-row .s-arrow{color:var(--muted);font-size:20px}
.dot{width:11px;height:11px;border-radius:50%;display:inline-block}
.dot.emerald{background:var(--emerald)}
.logout-btn{
  width:100%;padding:14px;border-radius:12px;background:#2a1518;border:1px solid #5b2330;
  color:var(--danger);font-size:16px;font-weight:600;
}
.settings-note{color:var(--muted);font-size:13px;text-align:center;margin-top:12px;line-height:1.55}

/* ---------- drawer ---------- */
.drawer-overlay,.login-overlay{position:absolute;inset:0;background:rgba(0,0,0,.62);z-index:30}
.drawer{
  position:absolute;top:0;left:0;bottom:0;width:min(84vw,320px);z-index:40;
  background:var(--bg-2);border-right:1px solid var(--border);
  transform:translateX(-105%);transition:transform .28s ease;
  display:flex;flex-direction:column;padding:calc(12px + env(safe-area-inset-top)) 14px calc(12px + env(safe-area-inset-bottom));
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;gap:10px;padding:2px 2px 12px}
.drawer-title{font-size:18px;font-weight:700;flex:1}
.drawer-search{padding-bottom:10px}
.drawer-search input{
  width:100%;background:var(--surface);border:1px solid var(--border);border-radius:10px;
  color:var(--text);padding:10px 12px;font-size:15px;outline:none;
}
.drawer-nav{display:flex;flex-direction:column}
.drawer-row{display:flex;align-items:center;gap:11px;padding:11px 6px;font-size:15.5px;text-align:left;border-radius:10px;width:100%}
.drawer-row:active{background:var(--surface)}
.drawer-row .d-icon{width:20px;text-align:center}
.drawer-label{color:var(--muted);font-size:13px;font-weight:600;margin:16px 6px 6px;letter-spacing:.02em}
.chat-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:2px}
.chat-item{
  display:flex;align-items:center;gap:8px;padding:11px 10px;border-radius:10px;font-size:15px;text-align:left;width:100%;
}
.chat-item:active,.chat-item.current{background:var(--surface)}
.chat-item .chat-item-title{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-item .chat-del{color:var(--muted);font-size:16px;padding:2px 6px;flex:none}
.chat-list-empty{color:var(--muted);font-size:14px;padding:4px 6px;line-height:1.5}
.drawer-foot{display:flex;align-items:center;gap:10px;padding-top:12px;border-top:1px solid var(--border)}
.new-chat-btn{
  display:flex;align-items:center;gap:7px;background:linear-gradient(145deg,var(--emerald),var(--emerald-dark));
  color:#fff;font-weight:600;font-size:15px;padding:11px 20px;border-radius:999px;
}
.drawer-profile{display:flex;align-items:center;gap:9px;margin-left:auto;padding:6px 4px}
.avatar-small{
  width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-family:"Inter",sans-serif;font-size:13px;font-weight:700;color:#fff;
  background:linear-gradient(145deg,#0e9f6e,#065f46);border:1.5px solid var(--gold);flex:none;
}
.drawer-profile-name{font-size:14.5px;font-weight:500}

/* ---------- login sheet ---------- */
.login-sheet{
  position:absolute;left:0;right:0;bottom:0;z-index:50;
  background:var(--bg-2);border-top:1px solid var(--gold);border-radius:24px 24px 0 0;
  padding:12px 22px calc(22px + env(safe-area-inset-bottom));
  max-width:520px;margin:0 auto;text-align:center;
  animation:rise .3s ease;max-height:92dvh;overflow-y:auto;
}
@keyframes rise{from{transform:translateY(40px);opacity:.4}to{transform:none;opacity:1}}
.sheet-handle{width:44px;height:5px;border-radius:99px;background:var(--border);margin:0 auto 16px}
.sheet-title{font-size:23px;font-weight:700;margin-bottom:6px}
.sheet-sub{color:var(--muted);font-size:14.5px;line-height:1.55;margin-bottom:20px}
.google-btn{
  width:100%;display:flex;align-items:center;justify-content:center;gap:10px;
  background:#fff;color:#1f2937;font-weight:600;font-size:16px;padding:13px;border-radius:999px;
}
.g-logo{font-family:"Inter",sans-serif;font-weight:800;color:#4285f4;font-size:18px}
.email-toggle{width:100%;margin-top:11px;padding:13px;border-radius:999px;border:1px solid var(--border);background:var(--surface);font-size:15.5px;font-weight:500}
.login-form{display:flex;flex-direction:column;gap:10px;margin-top:14px;text-align:left}
.login-form input{
  background:var(--surface);border:1px solid var(--border);border-radius:12px;color:var(--text);
  padding:13px 14px;font-size:15.5px;outline:none;width:100%;
}
.login-form input:focus{border-color:var(--emerald)}
.login-error{color:var(--danger);font-size:14px}
.login-submit{background:linear-gradient(145deg,var(--emerald),var(--emerald-dark));color:#fff;font-weight:700;font-size:16px;padding:13px;border-radius:999px}
.sheet-note{color:var(--muted);font-size:12.5px;margin-top:16px;line-height:1.55}

@media (min-width:560px){
  #app{border-left:1px solid var(--border);border-right:1px solid var(--border)}
}