:root{
  --bg:#F4F7F6;
  --surface:#FFFFFF;
  --surface-2:#EAF0EE;
  --border:#D9E3DF;
  --text:#16231F;
  --text-muted:#5B6E68;
  --accent:#0F4C4A;
  --accent-strong:#0A3634;
  --accent-soft:#DCEAE8;
  --marker:#B96A1C;
  --marker-soft:#F3E1CC;
  --shadow: 0 1px 2px rgba(15,35,32,.06), 0 6px 20px rgba(15,35,32,.05);
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0D1614; --surface:#142320; --surface-2:#1B2C28; --border:#28403A;
    --text:#E9F1EE; --text-muted:#9BB0AA; --accent:#5FC9BF; --accent-strong:#8AD9D0;
    --accent-soft:#1D3A36; --marker:#E2954D; --marker-soft:#3A2A1B;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  }
}
*{box-sizing:border-box;}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:'Manrope',system-ui,sans-serif; -webkit-font-smoothing:antialiased;
}

/* ---- Auth screen ---- */
.auth-screen{
  min-height:100vh; display:flex; align-items:center; justify-content:center; padding:24px;
}
.auth-card{
  width:100%; max-width:380px; background:var(--surface); border:1px solid var(--border);
  border-radius:16px; padding:28px; box-shadow:var(--shadow);
}
.auth-card h1{ font-size:1.3rem; margin:0 0 4px; }
.auth-card p.sub{ color:var(--text-muted); font-size:.85rem; margin:0 0 20px; }
.auth-card label{ font-size:.78rem; font-weight:700; color:var(--text-muted); display:block; margin:14px 0 4px; }
.auth-card input{
  width:100%; padding:10px 12px; border:1px solid var(--border); border-radius:10px;
  font-family:'Manrope'; font-size:.92rem; background:var(--bg); color:var(--text);
}
.auth-card button{
  width:100%; margin-top:16px; padding:11px; border-radius:10px; border:none;
  background:var(--accent); color:#fff; font-weight:700; font-family:'Manrope';
  font-size:.9rem; cursor:pointer;
}
.auth-card button.secondary{ background:var(--surface-2); color:var(--text); border:1px solid var(--border); }
.auth-divider{ text-align:center; color:var(--text-muted); font-size:.75rem; margin:18px 0; }
.auth-error{ color:#B33; font-size:.8rem; margin-top:10px; }

/* ---- App shell (adapted from the Nick the Client Artifact prototype) ---- */
.app{
  display:grid;
  grid-template-columns: 220px minmax(0,1fr) 280px;
  grid-template-rows: auto 1fr;
  grid-template-areas: "header header header" "side main notes";
  height:100vh;
}
@media (max-width: 880px){
  .app{
    grid-template-columns: 1fr; grid-template-rows: auto auto 1fr auto;
    grid-template-areas: "header" "side" "main" "notes"; height:auto; min-height:100vh;
  }
  .sidebar{max-height:180px;}
  .notes-panel{border-left:none; border-top:1px solid var(--border);}
}
header.app-header{
  grid-area:header; display:flex; align-items:center; gap:16px; padding:14px 20px;
  border-bottom:1px solid var(--border); background:var(--surface);
}
.brand{ display:flex; align-items:baseline; gap:8px; font-weight:800; font-size:1.05rem; letter-spacing:-.01em; }
.brand small{ font-weight:500; color:var(--text-muted); font-size:.75rem; text-transform:uppercase; letter-spacing:.08em; }
.timer-pill{
  font-size:.75rem; font-weight:700; color:var(--accent-strong); background:var(--accent-soft);
  padding:5px 12px; border-radius:100px; font-variant-numeric:tabular-nums;
}
.timer-pill.warning{ color:#8A4B00; background:#F3E1CC; }
.timer-pill.critical{ color:#fff; background:#B33; }
.stage-track{ display:flex; align-items:center; gap:6px; margin-left:auto; font-size:.78rem; font-weight:600; color:var(--text-muted); }
.stage-chip{ padding:5px 12px; border-radius:100px; border:1px solid var(--border); background:var(--surface-2); white-space:nowrap; }
.stage-chip.current{ background:var(--accent); color:var(--surface); border-color:var(--accent); }
.stage-arrow{ color:var(--border); font-size:.9rem; }

.sidebar{
  grid-area:side; border-right:1px solid var(--border); background:var(--surface); padding:14px;
  overflow-y:auto; display:flex; flex-direction:column; gap:10px;
}
.new-session-btn{
  width:100%; padding:10px 12px; border-radius:10px; border:1px solid var(--accent);
  background:var(--accent-soft); color:var(--accent-strong); font-weight:700; font-size:.85rem; cursor:pointer;
}
.new-session-btn:hover{ background:var(--accent); color:var(--surface); }
.persona-select{
  width:100%; padding:8px 10px; border-radius:8px; border:1px solid var(--border);
  background:var(--bg); color:var(--text); font-size:.8rem;
}
.session-list-label{ font-size:.68rem; text-transform:uppercase; letter-spacing:.08em; color:var(--text-muted); font-weight:700; margin:6px 2px 0; }
.session-item{ padding:8px 10px; border-radius:8px; cursor:pointer; font-size:.82rem; color:var(--text-muted); border:1px solid transparent; }
.session-item:hover{ background:var(--surface-2); }
.session-item.active{ background:var(--accent-soft); color:var(--accent-strong); font-weight:600; border-color:var(--accent-soft); }
.sidebar-note{ font-size:.72rem; color:var(--text-muted); padding:6px 2px; line-height:1.4; }
.logout-link{ margin-top:auto; font-size:.75rem; color:var(--text-muted); cursor:pointer; text-decoration:underline; }

main.chat{ grid-area:main; display:flex; flex-direction:column; min-height:0; background:var(--bg); }
.transcript{ flex:1; overflow-y:auto; padding:22px clamp(16px,4vw,48px); display:flex; flex-direction:column; gap:16px; }
.msg{ max-width:min(560px,80%); display:flex; flex-direction:column; gap:4px; }
.msg.coach{ align-self:flex-end; align-items:flex-end; }
.msg.nick{ align-self:flex-start; align-items:flex-start; }
.bubble{ padding:12px 16px; border-radius:16px; line-height:1.5; font-size:.95rem; box-shadow:var(--shadow); }
.msg.coach .bubble{ background:var(--accent); color:#fff; border-bottom-right-radius:4px; font-weight:500; }
.msg.nick .bubble{ background:var(--surface); color:var(--text); border-bottom-left-radius:4px; font-family:'Source Serif 4', Georgia, serif; font-size:1.02rem; border:1px solid var(--border); }
.msg-label{ font-size:.68rem; color:var(--text-muted); font-weight:700; text-transform:uppercase; letter-spacing:.06em; padding:0 4px; }
.internal-log{ font-size:.72rem; color:var(--text-muted); background:var(--surface-2); border:1px dashed var(--border); border-radius:8px; padding:6px 10px; max-width:min(560px,80%); line-height:1.5; }
.thinking{ font-size:.85rem; color:var(--text-muted); font-style:italic; padding:0 4px; }
.system-note{ align-self:center; text-align:center; font-size:.76rem; color:var(--text-muted); background:var(--surface-2); border:1px solid var(--border); border-radius:100px; padding:6px 16px; max-width:min(480px,90%); }
.speak-btn{ border:none; background:transparent; cursor:pointer; font-size:.85rem; color:var(--text-muted); padding:0 4px; align-self:flex-start; }
.speak-btn:hover{ color:var(--accent); }

.composer{ border-top:1px solid var(--border); background:var(--surface); padding:14px clamp(16px,4vw,48px); display:flex; gap:10px; }
.composer textarea{ flex:1; resize:none; border:1px solid var(--border); border-radius:12px; padding:10px 14px; font-family:'Manrope'; font-size:.92rem; background:var(--bg); color:var(--text); min-height:44px; max-height:140px; }
.composer textarea:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.send-btn{ padding:0 20px; border-radius:12px; border:none; background:var(--accent); color:#fff; font-weight:700; cursor:pointer; font-size:.88rem; }
.send-btn:disabled{ opacity:.5; cursor:default; }
.mic-btn{ flex:none; width:44px; height:44px; border-radius:12px; border:1px solid var(--border); background:var(--bg); font-size:1.05rem; cursor:pointer; color:var(--text); }
.mic-btn:hover{ border-color:var(--accent); }
.mic-btn.recording{ background:#B33; border-color:#B33; color:#fff; animation:pulse 1.4s ease-in-out infinite; }
.mic-btn:disabled{ opacity:.35; cursor:default; }
@keyframes pulse{ 0%,100%{ box-shadow:0 0 0 0 rgba(179,51,51,.4);} 50%{ box-shadow:0 0 0 6px rgba(179,51,51,0);} }
.composer-toast, .composer-hint{ font-size:.74rem; color:var(--text-muted); padding:0 clamp(16px,4vw,48px) 10px; }
.composer-hint{ font-size:.7rem; opacity:.8; }

.notes-panel{ grid-area:notes; border-left:1px solid var(--border); background:var(--surface); padding:16px; overflow-y:auto; display:flex; flex-direction:column; gap:18px; }
.panel-block h3{ margin:0 0 8px; font-size:.72rem; text-transform:uppercase; letter-spacing:.08em; color:var(--text-muted); font-weight:800; }
.checkpoint-btns{ display:flex; flex-direction:column; gap:6px; }
.checkpoint-btn{ text-align:left; padding:9px 12px; border-radius:10px; border:1px solid var(--border); background:var(--surface-2); color:var(--text); font-weight:600; font-size:.82rem; cursor:pointer; }
.checkpoint-btn:hover{ border-color:var(--marker); }
.checkpoint-btn.is-current{ background:var(--marker-soft); border-color:var(--marker); color:var(--marker); }
.note-input-row{ display:flex; gap:6px; margin-top:8px; }
.note-input-row input{ flex:1; border:1px solid var(--border); border-radius:8px; padding:7px 10px; font-size:.8rem; background:var(--bg); color:var(--text); }
.note-add-btn{ border:1px solid var(--border); background:var(--surface-2); border-radius:8px; padding:0 10px; cursor:pointer; font-size:.8rem; color:var(--text-muted); }
.notes-log{ display:flex; flex-direction:column; gap:8px; }
.note-entry{ font-size:.78rem; border-left:2px solid var(--marker); padding:2px 0 2px 10px; color:var(--text); }
.note-entry time{ display:block; color:var(--text-muted); font-size:.68rem; }
.empty-hint{ font-size:.78rem; color:var(--text-muted); line-height:1.5; }
.toggle-row{ display:flex; align-items:center; justify-content:space-between; gap:8px; }
.toggle-row label{ font-size:.8rem; color:var(--text); font-weight:600; }
.switch{ position:relative; width:36px; height:20px; flex:none; }
.switch input{ opacity:0; width:0; height:0; }
.slider{ position:absolute; inset:0; background:var(--border); border-radius:20px; cursor:pointer; transition:.15s; }
.slider:before{ content:""; position:absolute; width:14px; height:14px; left:3px; top:3px; background:var(--surface); border-radius:50%; transition:.15s; }
.switch input:checked + .slider{ background:var(--accent); }
.switch input:checked + .slider:before{ transform:translateX(16px); }
.voice-row{ display:flex; gap:6px; margin-top:8px; }
.voice-row select{ flex:1; border:1px solid var(--border); border-radius:8px; padding:7px 8px; font-size:.78rem; background:var(--bg); color:var(--text); }
.usage-stats{ display:flex; flex-direction:column; gap:6px; font-size:.78rem; color:var(--text); font-variant-numeric:tabular-nums; }
.usage-stats .row{ display:flex; justify-content:space-between; gap:8px; }
.usage-stats .row span:first-child{ color:var(--text-muted); }
.usage-divider{ margin:6px 0 -2px; padding-top:6px; border-top:1px solid var(--border); font-size:.68rem; text-transform:uppercase; letter-spacing:.06em; color:var(--text-muted); font-weight:700; }
.end-btn{ width:100%; padding:9px; border-radius:10px; border:1px solid var(--border); background:transparent; color:var(--text-muted); font-weight:600; font-size:.8rem; cursor:pointer; margin-top:auto; }
.end-btn:hover{ border-color:#B33; color:#B33; }

::-webkit-scrollbar{ width:10px; }
::-webkit-scrollbar-thumb{ background:var(--border); border-radius:10px; }
[hidden]{ display:none !important; }