:root {
  --brand-color: #00A651;
  --bg: #f7f8fb;
  --panel: #ffffff;
  --muted: #98a0ab;
  --accent: #0b66a3;
}
* { box-sizing: border-box; }
html,body { height:100%; margin:0; background:var(--bg); font-family: Inter, "Segoe UI", Arial, sans-serif; color:#17202a; }

header.appbar {
  display:flex; align-items:center; justify-content:space-between;
  background:#fff; color:#17202a; padding:12px 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  gap: 20px;
}
.brand { display:flex; align-items:center; gap:12px; }
.brand img { height:36px; width:auto; display:block; border-radius:6px; }
.brand .title { font-weight:600; font-size:16px; }

.account-box { display:flex; align-items:center; gap:8px; flex-grow:1; justify-content:center; }
.account-box label { font-size:13px; font-weight:500; color:#444; }
#account_number { padding:6px 8px; border-radius:8px; border:1px solid #ccc; font-size:13px; width:170px; }

.header-controls { display:flex; align-items:center; gap:10px; }
.signout-btn { padding:7px 12px; border-radius:10px; background:var(--brand-color); color:#fff; font-weight:600; border:none; cursor:pointer; }

#greeting { font-size:14px; font-weight:600; color:#0b2940; }

.app { display:flex; flex-direction:column; height:calc(100vh - 60px); }
.chat-panel { flex:1; overflow:auto; padding:22px; display:flex; flex-direction:column; gap:12px; align-items:flex-start; }

.message { max-width:78%; padding:12px 14px; border-radius:12px; line-height:1.4; font-size:14px; word-wrap:break-word; position:relative; }
.assistant { background:#f4f9ff; border:1px solid #e6f0fb; color:#0b2940; align-self:flex-start; border-top-left-radius:6px; }
.user { background:#e0e0e0; border:1px solid #bbb; color:#333; align-self:flex-end; border-top-right-radius:6px;
  white-space: normal; overflow: visible; text-overflow: unset;
}

.copy-btn {
  position:absolute;
  top:6px;
  right:6px;
  font-size:10px;
  padding:3px 5px;
  border:none;
  border-radius:6px;
  background:var(--accent);
  color:#fff;
  cursor:pointer;
  opacity:0.8;
}
.copy-btn:hover { opacity:1; }

.meta { font-size:12px; color:var(--muted); margin-bottom:6px; }

.composer-wrap { background:var(--panel); border-top:1px solid #ddd; }
.composer { padding:14px; display:flex; gap:12px; align-items:flex-end; }
.composer .left { display:flex; flex-direction:column; gap:6px; width:100%; }
textarea#prompt {
  width:100%; min-height:56px; max-height:160px; resize:vertical; padding:12px;
  border-radius:10px; border:1px solid #d7e6f6; background:#fff; font-size:14px; color:#0b2530;
}
.controls-row { display:flex; align-items:center; justify-content:flex-end; gap:8px; margin-top:6px; }

button.send { padding:10px 16px; background:var(--accent); color:white; border:none; border-radius:10px; font-weight:600; cursor:pointer; }
button.send:disabled { opacity:0.5; cursor:not-allowed; }

.examples { display:flex; gap:8px; flex-wrap:wrap; padding:8px 12px; border-top:1px solid #eee; }
.example-chip, .suggestion-chip { font-size:11px; padding:5px 9px; border-radius:999px; cursor:pointer; }
.example-chip { background:#f2f6fb; color:#0b2940; }
.example-chip:hover { background:#dcecfb; }
.suggestion-chip { background:#e6f3ff; color:#0b2940; }
.suggestion-chip:hover { background:#cce0ff; }

table { border-collapse: collapse; margin-top: 10px; width: 100%; font-size:13px; }
th, td { border: 1px solid #ccc; padding: 6px; text-align: left; }
th { background: #f1f1f1; }
.download-btn { display:inline-block; margin-top:8px; padding:6px 10px; background:#0073bb; color:white; text-decoration:none; border-radius:6px; font-size:12px; }

.help-btn {
  padding: 7px 10px;
  border-radius: 50%;
  background: #f0f0f0;
  color: var(--accent);
  border: 1px solid #ddd;
  width: 32px;
  height: 32px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}
.help-btn:hover { 
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

body { user-select: none; -webkit-user-select: none; -moz-user-select: none; }
input, textarea, select, button { user-select: text; -webkit-user-select: text; }

@media (max-width: 768px) {
  header.appbar { flex-direction: column; align-items: flex-start; padding: 10px; gap: 8px; }
  .brand { width: 100%; justify-content: flex-start; }
  .brand .title { font-size: 14px; }
  .account-box { width: 100%; justify-content: flex-start; }
  .header-controls { width: 100%; justify-content: space-between; }
  #account_number { width: 100%; }
  .message { max-width: 100%; font-size: 13px; line-height: 1.4; }
  .composer { padding: 10px; }
  textarea#prompt { min-height: 48px; font-size: 13px; line-height: 1.4; }
}

@media (max-width: 480px) {
  .brand img { height: 28px; }
  .brand .title { font-size: 13px; }
  .signout-btn { padding: 6px 10px; font-size: 13px; }
  .copy-btn { font-size: 10px; padding: 2px 5px; }
  .download-btn { font-size: 11px; padding: 5px 8px; }
  .help-btn { width: 38px; height: 38px; font-size: 16px; line-height: 1; }
}