/* MedBot v4 — Premium Medical Chat UI */
:root {
  --primary: #00E5A0;
  --primary-dim: rgba(0,229,160,.15);
  --primary-ghost: rgba(0,229,160,.06);
  --accent: #7C5CFC;
  --bg-0: #0A0E14;
  --bg-1: #111820;
  --bg-2: #1A2230;
  --bg-3: #222E3E;
  --text-0: #F0F4F8;
  --text-1: #C8D6E5;
  --text-2: #8899AA;
  --text-3: #5C6B7A;
  --red: #FF5C72;
  --sidebar-w: 280px;
  --sidebar-collapsed-w: 0px;
  --font-ui: 'Inter','Space Grotesk',system-ui,sans-serif;
  --font-mono: 'JetBrains Mono',monospace;
  --font-display: 'Outfit',sans-serif;
  --ease: cubic-bezier(.2,.8,.2,1);
  --ease-bounce: cubic-bezier(.34,1.56,.64,1);
  --r-sm: 8px; --r-md: 14px; --r-lg: 20px; --r-xl: 28px; --r-pill: 999px;
  --glass: rgba(17,24,32,.7);
  --glass-border: rgba(0,229,160,.1);
  --t-fast: .15s; --t-mid: .3s;
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden;background:var(--bg-0);color:var(--text-1);font-family:var(--font-ui)}
button,textarea,input,select{font-family:inherit}

/* ── Animated BG ── */
#liquid-bg {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}
.bg-gradient{position:fixed;inset:0;z-index:0;background:linear-gradient(135deg,var(--bg-0),var(--bg-1),#0D1520);background-size:400% 400%;animation:bgShift 15s ease infinite}
@keyframes bgShift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.bg-glow{position:fixed;width:500px;height:500px;border-radius:50%;filter:blur(120px);opacity:.12;z-index:0;pointer-events:none}
.bg-glow--1{top:-100px;left:-100px;background:var(--primary)}
.bg-glow--2{bottom:-150px;right:-100px;background:var(--accent)}

/* ── Splash ── */
.splash{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:20px;background:var(--bg-0);transition:opacity .6s ease,visibility .6s}
.splash.hide{opacity:0;visibility:hidden;pointer-events:none}
.splash-logo{width:80px;height:80px;animation:splashPulse 1.5s ease-in-out infinite alternate}
@keyframes splashPulse{from{transform:scale(.95);filter:drop-shadow(0 0 20px rgba(0,229,160,.3))}to{transform:scale(1.05);filter:drop-shadow(0 0 40px rgba(0,229,160,.6))}}
.splash-text{font-family:var(--font-display);font-size:1.6rem;font-weight:700;color:var(--text-0);letter-spacing:-.02em}
.splash-sub{font-size:.75rem;color:var(--text-2);font-family:var(--font-mono)}
.splash-bar{width:120px;height:3px;border-radius:3px;background:var(--bg-3);overflow:hidden;margin-top:8px}
.splash-bar-fill{height:100%;width:0;background:var(--primary);border-radius:3px;animation:splashFill 2s ease forwards}
@keyframes splashFill{to{width:100%}}

/* ── App Shell ── */
.app-shell{display:flex;height:100%;width:100%;position:relative;z-index:10}

/* ── Sidebar ── */
.sidebar{width:var(--sidebar-w);background:rgba(10,14,20,.92);backdrop-filter:blur(24px);border-right:1px solid var(--glass-border);display:flex;flex-direction:column;gap:16px;padding:20px 16px;flex-shrink:0;z-index:20;transition:all var(--t-mid) var(--ease);overflow:hidden}
.sidebar.collapsed{width:var(--sidebar-collapsed-w);padding-left:0;padding-right:0;border-right:none;opacity:0;pointer-events:none}
.sidebar-logo{display:flex;align-items:center;gap:12px;padding-bottom:8px}
.logo-icon{width:42px;height:42px;border-radius:var(--r-md);background:linear-gradient(135deg,rgba(0,229,160,.2),rgba(0,229,160,.05));border:1px solid rgba(0,229,160,.3);display:flex;align-items:center;justify-content:center;position:relative;box-shadow:0 0 24px rgba(0,229,160,.12)}
.pulse-ring{position:absolute;inset:-4px;border-radius:16px;border:1px solid var(--primary);opacity:0;animation:ringPulse 3s ease infinite}
@keyframes ringPulse{0%{transform:scale(.95);opacity:.5}100%{transform:scale(1.4);opacity:0}}
.logo-name{font-family:var(--font-display);font-size:1.3rem;font-weight:700;color:var(--text-0)}
.logo-sub{font-size:.6rem;color:var(--primary);font-family:var(--font-mono);font-weight:600;text-transform:uppercase;letter-spacing:.06em}

.status-bar{display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--primary-ghost);border:1px solid var(--glass-border);border-radius:var(--r-sm);font-size:.7rem;font-family:var(--font-mono);color:var(--text-2)}
.status-dot{width:7px;height:7px;border-radius:50%;background:#ffaa00;box-shadow:0 0 8px #ffaa00;transition:all var(--t-mid)}
.status-dot.online{background:var(--primary);box-shadow:0 0 10px var(--primary)}

.sidebar-actions{display:flex;flex-direction:column;gap:8px}
.action-btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:12px;border-radius:var(--r-md);font-size:.82rem;font-weight:600;cursor:pointer;transition:all var(--t-fast) var(--ease);background:transparent;color:var(--text-1);border:1px solid rgba(0,229,160,.12)}
.action-btn:hover{background:var(--primary-ghost);border-color:rgba(0,229,160,.3);transform:translateY(-1px)}
.action-btn:active{transform:scale(.97)}
.action-btn--accent{background:var(--primary-ghost);border-color:rgba(0,229,160,.35);color:var(--primary)}

.sidebar-stats{background:var(--primary-ghost);border:1px solid var(--glass-border);border-radius:var(--r-md);padding:12px;display:flex;flex-direction:column;gap:8px}
.stat{display:flex;align-items:center;gap:8px;font-size:.7rem;color:var(--text-3)}
.stat-k{flex:1}
.stat-v{font-family:var(--font-mono);color:var(--text-2);font-weight:600;font-size:.65rem}
.stat-v--green{color:var(--primary)}

.sidebar-disclaimer{font-size:.62rem;color:rgba(255,255,255,.25);text-align:center;line-height:1.5;padding:0 8px;margin-top:auto}

/* ── Main Chat Area ── */
.chat-main{flex:1;display:flex;flex-direction:column;overflow:hidden;transition:all var(--t-mid) var(--ease)}

.chat-header{height:60px;display:flex;align-items:center;padding:0 20px;gap:14px;background:rgba(10,14,20,.85);backdrop-filter:blur(16px);border-bottom:1px solid var(--glass-border)}
.hamburger{display:flex;background:none;border:none;width:32px;height:32px;flex-direction:column;justify-content:center;gap:5px;cursor:pointer;padding:4px}
.hamburger span{width:22px;height:2px;background:var(--primary);border-radius:2px;transition:all var(--t-fast)}
.hamburger:hover span{background:var(--text-0)}
/* Desktop: only show hamburger when sidebar is NOT fixed? No, user wants a toggle. */
@media(min-width:769px){
  .hamburger{display:flex}
}
.header-info{flex:1}
.header-title{font-size:.95rem;font-weight:600;color:var(--text-0)}
.header-sub{font-size:.62rem;color:var(--text-3);font-family:var(--font-mono);margin-top:1px}
.header-model-picker{display:flex;align-items:center}
.model-select{appearance:none;-webkit-appearance:none;background:var(--primary-ghost);border:1px solid rgba(0,229,160,.18);border-radius:var(--r-sm);color:var(--primary);font-family:var(--font-mono);font-size:.72rem;padding:6px 28px 6px 10px;cursor:pointer;outline:none;transition:all var(--t-fast);background-image:url('data:image/svg+xml;charset=US-ASCII,%3Csvg xmlns%3D%22http%3A//www.w3.org/2000/svg%22 width%3D%22292.4%22 height%3D%22292.4%22%3E%3Cpath fill%3D%2200E5A0%22 d%3D%22M287 69.4a17.6 17.6 0 0 0-13-5.4H18.4c-5 0-9.3 1.8-12.9 5.4A17.6 17.6 0 0 0 0 82.2c0 5 1.8 9.3 5.4 12.9l128 127.9c3.6 3.6 7.8 5.4 12.8 5.4s9.2-1.8 12.8-5.4L287 95c3.5-3.5 5.4-7.8 5.4-12.8 0-5-1.9-9.2-5.5-12.8z%22/%3E%3C/svg%3E');background-repeat:no-repeat;background-position:right 8px center;background-size:9px;font-weight:600}
.model-select:hover{border-color:rgba(0,229,160,.4)}
.model-select:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(0,229,160,.15)}
.model-select option{background:var(--bg-2);color:var(--text-0)}

/* ── Messages Scroll ── */
.messages-scroll{flex:1;overflow-y:auto;padding:20px 24px;display:flex;flex-direction:column;scroll-behavior:smooth}
.messages-scroll::-webkit-scrollbar{width:4px}
.messages-scroll::-webkit-scrollbar-thumb{background:rgba(0,229,160,.12);border-radius:4px}

/* ── Welcome ── */
.welcome{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px 16px}
.welcome-avatar{width:88px;height:88px;border-radius:50%;background:linear-gradient(135deg,rgba(0,229,160,.15),rgba(124,92,252,.1));border:2px solid rgba(0,229,160,.25);display:flex;align-items:center;justify-content:center;margin-bottom:20px;animation:avatarIn .6s var(--ease-bounce) both;box-shadow:0 0 40px rgba(0,229,160,.1)}
@keyframes avatarIn{from{opacity:0;transform:scale(.5) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}
.welcome-avatar svg{width:44px;height:44px}
/* ── Welcome Screen & Suggestions ── */
.welcome{position:relative;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 0;text-align:center;min-height:50vh;border-radius:24px;margin-bottom:24px;background:transparent;border:none;width: 100%;}
.welcome-content{position:relative;z-index:10;display:flex;flex-direction:column;align-items:center;width:100%}
.welcome-title{font-size:2.5rem;font-weight:700;letter-spacing:-.03em;margin-bottom:12px;background:linear-gradient(180deg,rgba(255,255,255,1) 0%,rgba(255,255,255,0.7) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;filter:drop-shadow(0 4px 20px rgba(0,0,0,0.8))}
.welcome-desc{color:rgba(255,255,255,0.8);font-size:1.05rem;max-width:400px;line-height:1.5;margin-bottom:40px;filter:drop-shadow(0 2px 4px rgba(0,0,0,0.8))}

.suggestions{display:block;width:100%;max-width:none;z-index:10;position:relative;margin: 20px 0;overflow: visible;}
.sug-card{background:rgba(10,14,20,0.6);border:1px solid rgba(255,255,255,0.1);border-radius:16px;padding:20px;text-align:left;color:var(--text-1);font-size:.9rem;line-height:1.5;cursor:pointer;transition:all var(--t-fast) ease;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 8px 32px rgba(0,0,0,0.3)}
.sug-card > span { display: block; }
.sug-card:hover{background:rgba(40,40,40,0.8);border-color:rgba(255,255,255,0.2);transform:translateY(-2px);color:var(--text-1);box-shadow:0 8px 20px rgba(0,0,0,0.4)}

/* ── Messages ── */
#messages-list{display:flex;flex-direction:column;gap:20px}
.msg{display:flex;gap:10px;max-width:82%;animation:msgIn .35s var(--ease) both}
@keyframes msgIn{from{opacity:0;transform:translateY(12px)}}
.msg--user{align-self:flex-end;flex-direction:row-reverse}
.msg--bot{align-self:flex-start}
.msg-avatar{width:34px;height:34px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-weight:700;font-size:.75rem;flex-shrink:0}
.msg--user .msg-avatar{background:linear-gradient(135deg,rgba(0,229,160,.15),rgba(0,229,160,.05));border:1px solid rgba(0,229,160,.2);color:var(--primary);font-size:.65rem}
.msg--bot .msg-avatar{background:linear-gradient(135deg,rgba(124,92,252,.12),rgba(0,229,160,.08));border:1px solid rgba(124,92,252,.2);color:var(--accent);font-size:1rem}
.msg-bubble{padding:14px 18px;border-radius:var(--r-lg);position:relative}
.msg--user .msg-bubble{background:linear-gradient(135deg,rgba(0,229,160,.12),rgba(0,229,160,.04));border:1px solid rgba(0,229,160,.18);border-bottom-right-radius:6px}
.msg--bot .msg-bubble{background:var(--glass);border:1px solid var(--glass-border);border-bottom-left-radius:6px}
.msg--bot .msg-bubble::before{content:'';position:absolute;left:0;top:14px;bottom:14px;width:2px;background:linear-gradient(180deg,var(--primary),var(--accent));border-radius:2px}
.msg-body{font-size:.88rem;line-height:1.65;color:var(--text-1)}
.msg-body p{margin-bottom:8px}
.msg-body p:last-child{margin-bottom:0}
.msg-body h1{font-size:1.05rem;color:var(--primary);margin:14px 0 5px}
.msg-body h2{font-size:1rem;color:var(--primary);margin:14px 0 5px}
.msg-body h3{font-size:.92rem;color:var(--text-0);margin:12px 0 4px}
.msg-body ul,.msg-body ol{padding-left:22px;margin-bottom:8px}
.msg-body strong{color:var(--primary);font-weight:600}
.msg-body code{font-family:var(--font-mono);background:rgba(0,229,160,.08);padding:2px 6px;border-radius:4px;color:var(--primary);font-size:.78rem}
.msg-body pre{background:rgba(0,0,0,.4);border:1px solid var(--glass-border);padding:12px;border-radius:var(--r-sm);overflow-x:auto;margin:8px 0}
.msg-body pre code{background:none;padding:0;color:var(--text-1)}
.msg-body blockquote{border-left:2px solid var(--primary);padding-left:14px;color:var(--text-2);font-style:italic;margin:8px 0}
.msg-body table{border-collapse:collapse;width:100%;margin:8px 0;font-size:.78rem}
.msg-body th,.msg-body td{border:1px solid var(--glass-border);padding:7px 10px;text-align:left}
.msg-body th{background:var(--primary-ghost);color:var(--primary)}

.msg-sources{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px;padding-top:8px;border-top:1px solid var(--glass-border)}
.src-tag{display:inline-flex;align-items:center;padding:3px 8px;background:var(--primary-ghost);border:1px solid rgba(0,229,160,.12);border-radius:var(--r-pill);font-size:.62rem;color:var(--primary);font-family:var(--font-mono)}
.msg-time{font-size:.58rem;color:var(--text-3);margin-top:6px;font-family:var(--font-mono)}

/* ── Typing Indicator ── */
.typing-indicator{display:flex;align-items:center;gap:10px;animation:fadeUp .3s ease}
.typing-dots{display:flex;gap:4px;padding:12px 16px;background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--r-md);border-bottom-left-radius:6px}
.typing-dots span{width:6px;height:6px;border-radius:50%;background:var(--primary);animation:dotBounce 1.4s infinite}
.typing-dots span:nth-child(2){animation-delay:.2s}
.typing-dots span:nth-child(3){animation-delay:.4s}
@keyframes dotBounce{0%,80%,100%{transform:translateY(0);opacity:.3}40%{transform:translateY(-6px);opacity:1}}
.typing-text{font-size:.72rem;color:var(--text-2);font-family:var(--font-mono);animation:pulse 1.5s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}

/* ── Streaming cursor ── */
.streaming-cursor::after{content:'▊';color:var(--primary);animation:cursorBlink .8s step-end infinite;margin-left:2px}
@keyframes cursorBlink{0%,100%{opacity:1}50%{opacity:0}}

/* ── Input Bar ── */
.input-bar{padding:14px 24px 18px;background:rgba(10,14,20,.9);backdrop-filter:blur(12px);border-top:1px solid var(--glass-border)}
.input-wrap{display:flex;align-items:flex-end;gap:8px;background:rgba(0,0,0,.3);border:1px solid rgba(0,229,160,.15);border-radius:var(--r-xl);padding:8px 10px 8px 18px;transition:all var(--t-mid) var(--ease)}
.input-wrap.focused{border-color:rgba(0,229,160,.4);box-shadow:0 0 0 3px rgba(0,229,160,.08),0 4px 20px rgba(0,229,160,.06)}
#chat-input{flex:1;background:none;border:none;outline:none;color:var(--text-0);font-family:var(--font-ui);font-size:.9rem;line-height:1.5;resize:none;max-height:120px;padding:4px 0}
#chat-input::placeholder{color:var(--text-3)}
.input-actions{display:flex;align-items:center;gap:10px;margin-bottom:2px}
.counter{font-size:.62rem;color:var(--text-3);font-family:var(--font-mono)}
.counter.warn{color:var(--red)}
.send-btn{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#00C48C);border:none;color:#000;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--t-fast) var(--ease);box-shadow:0 2px 12px rgba(0,229,160,.2)}
.send-btn:hover:not(:disabled){transform:scale(1.08);box-shadow:0 4px 20px rgba(0,229,160,.35)}
.send-btn:active:not(:disabled){transform:scale(.92)}
.send-btn:disabled{opacity:.15;background:var(--text-3);cursor:not-allowed;box-shadow:none}
.send-btn.sending{animation:sendPulse .3s ease}
@keyframes sendPulse{0%{transform:scale(1)}50%{transform:scale(.85)}100%{transform:scale(1)}}
.input-footer{display:flex;justify-content:space-between;padding:8px 8px 0;font-size:.62rem;color:var(--text-3)}
kbd{padding:2px 5px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:4px;font-family:var(--font-mono);color:var(--text-2);font-size:.58rem}
.powered-by{font-family:var(--font-mono);color:var(--primary)}

/* ── Scroll-to-Bottom FAB ── */
.scroll-fab{position:absolute;bottom:90px;right:24px;width:38px;height:38px;border-radius:50%;background:var(--glass);border:1px solid var(--glass-border);color:var(--primary);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;transform:translateY(10px) scale(.8);transition:all var(--t-mid) var(--ease);z-index:30;backdrop-filter:blur(8px)}
.scroll-fab.visible{opacity:1;transform:translateY(0) scale(1)}
.scroll-fab:hover{background:var(--primary-ghost);box-shadow:0 4px 16px rgba(0,229,160,.15)}

/* ── Mobile Backdrop ── */
.mobile-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);z-index:99;opacity:0;pointer-events:none;transition:opacity var(--t-mid)}
.mobile-backdrop.active{opacity:1;pointer-events:all}

/* ── Responsive ── */
@media(max-width:768px){
  html{height:-webkit-fill-available}
  body{min-height:-webkit-fill-available;min-height:100dvh}
  .sidebar{position:fixed;inset:0 auto 0 0;width:280px;transform:translateX(-100%);z-index:100;box-shadow:4px 0 40px rgba(0,0,0,.7)}
  .sidebar.open{transform:translateX(0)}
  .hamburger{display:flex}
  .suggestions{grid-template-columns:1fr}
  .messages-scroll{padding:14px 12px}
  .input-bar{padding:10px 12px 14px}
  .msg{max-width:92%}
  .welcome-title{font-size:1.5rem}
  .send-btn{width:44px;height:44px}
  .action-btn{min-height:44px}
  .welcome-avatar{width:72px;height:72px}
  .welcome-avatar svg{width:36px;height:36px}
}
@media(max-width:480px){
  .chat-header{padding-top:env(safe-area-inset-top,0);height:calc(56px + env(safe-area-inset-top,0));padding-left:10px}
  .input-bar{padding-bottom:calc(12px + env(safe-area-inset-bottom,0))}
}