:root{ --bg:#0b0f14; --card:#121821; --muted:#a6b3c1; --text:#e6edf3; --accent:#4f8cff; --border:#1f2a38; --danger:#ff6b6b; --topbar-h:56px;}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;overflow:hidden;padding-bottom:env(safe-area-inset-bottom)}
.hidden{display:none !important}
.muted{color:var(--muted);font-size:.92em}
.center{min-height:100%;display:grid;place-items:center;padding:24px}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:24px;max-width:440px;width:100%;box-shadow:0 10px 20px rgba(0,0,0,.25)}
h1,h2{margin:0 0 12px}
.form{display:grid;gap:12px}
label{display:grid;gap:6px}
input,textarea,select{width:100%;background:#0c141e;border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:8px;outline:none}
textarea{resize:vertical}
.btn{background:var(--accent);border:1px solid transparent;color:white;padding:10px 14px;border-radius:8px;cursor:pointer}
.btn:hover{opacity:.95}
.btn.outline{background:transparent;border-color:var(--border);color:var(--text)}
.icon-btn{background:transparent;border:1px solid var(--border);color:var(--text);border-radius:8px;padding:6px 10px;cursor:pointer}
.error{color:var(--danger);margin:8px 0 0}

.topbar{position:sticky;top:0;z-index:20;background:rgba(11,15,20,.85);backdrop-filter: blur(6px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:10px 12px;gap:8px;min-height:56px}
.brand{font-weight:700}
.actions{display:flex;gap:8px;align-items:center}
.select{min-width:220px}

.container{max-width:900px;margin:0 auto;padding:12px;display:flex;flex-direction:column;height:calc(100dvh - var(--topbar-h));min-height:0}
.chat{flex:1;overflow:auto;display:flex;flex-direction:column;gap:10px;padding:8px;min-height:0}
.bubble{max-width:85%;padding:10px 12px;border-radius:12px;border:1px solid var(--border);white-space:pre-wrap}
.me{align-self:flex-end;background:#173154}
.ai{align-self:flex-start;background:#16212f}
.composer{display:flex;gap:8px;align-items:flex-end;border-top:1px solid var(--border);padding-top:8px;padding-bottom:calc(8px + env(safe-area-inset-bottom))}
#message{flex:1;min-height:44px;max-height:200px}

/* Loading bar */
.loading{position:fixed;left:0;top:0;width:100%;height:3px;z-index:100}
.loading .bar{position:absolute;left:0;top:0;height:100%;width:25%;background:linear-gradient(90deg,var(--accent),#7aa6ff);animation:loading-slide 1.1s infinite ease-in-out}
@keyframes loading-slide{0%{left:-25%}50%{left:50%}100%{left:100%}}

/* Thinking dots */
.dots{display:inline-flex;gap:3px;vertical-align:middle}
.dots span{width:6px;height:6px;background:#7aa6ff;border-radius:50%;display:inline-block;opacity:.8;animation:dots 1s infinite}
.dots span:nth-child(2){animation-delay:.15s}
.dots span:nth-child(3){animation-delay:.3s}
@keyframes dots{0%,80%,100%{transform:scale(0.8)}40%{transform:scale(1)}}

.modal{position:fixed;inset:0;background:rgba(0,0,0,.4);display:grid;place-items:center;padding:16px;z-index:50;overflow:auto;-webkit-overflow-scrolling:touch}
.modal-card{width:min(900px,100%);max-height:90vh;display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);border-radius:12px}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border);flex-shrink:0}
.modal-body{padding:16px;display:grid;gap:16px;overflow-y:auto;-webkit-overflow-scrolling:touch;min-height:0;flex:1}
.list{display:grid;gap:8px}
.row{display:flex;gap:8px;align-items:center;justify-content:space-between;border:1px solid var(--border);border-radius:8px;padding:10px 12px;background:#0c141e}
.row-title{font-weight:600}
.row-actions{display:flex;gap:6px}

@media (max-width:640px){
  .topbar{flex-direction:column;align-items:stretch;gap:8px}
  .actions{flex-wrap:wrap;width:100%}
  .actions > *{flex:1 1 100%}
  .select{min-width:unset;width:100%}
  .composer{flex-direction:column}
  #message{width:100%}
  .modal{padding:8px}
  .modal-card{max-height:calc(100vh - 16px);max-height:calc(100dvh - 16px);border-radius:8px}
  .modal-body{padding:12px}
}

/* When virtual keyboard is open, allow page to scroll */
body.kb-open{overflow:auto}

/* Fixed composer on mobile and container padding */
.composer.fixed{position:fixed;left:0;right:0;bottom:env(safe-area-inset-bottom);background:var(--card);z-index:30;border-top:1px solid var(--border);padding:8px 12px calc(8px + env(safe-area-inset-bottom))}
body.fixed-composer .container{padding-bottom:calc(var(--composer-h, 80px) + 16px)}