:root{
  --red:#ED1C24;
  --black:#1A1A1A;
  --card:#222222;
  --border:#2A2A2A;
  --text:#F2F2F2;
  --muted:#BDBDBD;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  background:var(--black);color:var(--text);
  font-family:"Be Vietnam Pro",-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  display:flex;flex-direction:column;height:100vh;
  font-size:18px;
}
.hidden{display:none !important}

.topbar{
  display:flex;align-items:baseline;gap:12px;
  padding:14px 20px;border-bottom:1px solid var(--border);
}
.brand{color:var(--red);font-weight:800;font-size:22px;letter-spacing:1px}
.tagline{color:var(--muted);font-size:14px}

/* Gate */
.gate{position:fixed;inset:0;background:var(--black);display:flex;align-items:center;justify-content:center;z-index:10}
.gate-box{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:28px;width:min(92vw,380px);text-align:center}
.gate-box h2{margin:0 0 8px}
.gate-box p{color:var(--muted);font-size:14px;margin:0 0 16px}
.gate-box input{width:100%;padding:12px;border-radius:10px;border:1px solid var(--border);background:#111;color:var(--text);margin-bottom:12px}
.gate-box button{width:100%;padding:12px;border:0;border-radius:10px;background:var(--red);color:#fff;font-weight:700;cursor:pointer}
.err{color:var(--red);font-size:13px;margin-top:8px;min-height:18px}

/* Survey */
.survey{flex:1;overflow-y:auto;width:100%;display:flex;justify-content:center;padding:24px 16px 40px}
.survey-box{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:28px;width:min(94vw,680px);align-self:flex-start;box-shadow:0 8px 32px rgba(0,0,0,.35)}
.survey-box h2{margin:0 0 6px;font-size:22px;letter-spacing:.2px}
.survey-sub{color:var(--muted);font-size:14px;margin:0 0 20px}

.welcome-note{
  background:linear-gradient(180deg,#1f1f1f 0%,#1a1a1a 100%);
  border:1px solid var(--border);
  border-left:3px solid var(--red);
  border-radius:12px;
  padding:18px 20px;
  margin:0 0 22px;
  color:var(--text);
  font-size:15px;
  line-height:1.65;
}
.welcome-note p{margin:0 0 10px}
.welcome-note p:last-child{margin:0}
.welcome-note strong{color:#fff}
.welcome-sign{
  color:var(--muted);
  font-size:14px;
  margin-top:14px !important;
  padding-top:12px;
  border-top:1px solid var(--border);
}
.welcome-sign .sign-name{color:var(--red);font-weight:700;font-size:15px}

.form-wrap{
  background:#fff;
  border-radius:12px;
  padding:8px 6px;
  box-shadow:0 4px 16px rgba(0,0,0,.25);
}
#tallyFrame{
  display:block;
  width:100%;
  min-height:2200px;
  border:0;
  background:#fff;
  border-radius:8px;
  transition:height .2s ease;
}
.tally-fallback{
  margin-top:14px;
  padding:14px 16px;
  background:rgba(237,28,36,0.08);
  border:1px solid rgba(237,28,36,0.3);
  border-radius:8px;
  font-size:14px;
  color:var(--text);
  line-height:1.55;
}
.tally-fallback a{
  color:#ED1C24;
  font-weight:700;
  text-decoration:underline;
}
.tally-fallback button{
  margin-top:10px;
  background:transparent;
  border:1px solid #ED1C24;
  color:#ED1C24;
  padding:8px 16px;
  border-radius:6px;
  font-size:13px;
  font-weight:600;
  cursor:pointer;
}

.fld{display:block;margin-bottom:12px;font-size:15px;color:var(--muted)}
.fld input{display:block;width:100%;margin-top:6px;padding:11px;border-radius:10px;border:1px solid var(--border);background:#111;color:var(--text);font-size:16px}
.q{margin:16px 0;padding-top:14px;border-top:1px solid var(--border)}
.q p{margin:0 0 8px;color:var(--text);font-size:16px}
.q label{display:block;margin:6px 0;color:var(--text);font-size:15px;cursor:pointer}
.q textarea{width:100%;padding:11px;border-radius:10px;border:1px solid var(--border);background:#111;color:var(--text);font-family:inherit;font-size:16px}
.survey-box button{margin-top:18px}

@media (max-width:560px){
  .survey{padding:16px 12px 32px}
  .survey-box{padding:20px}
  .welcome-note{padding:16px}
  #tallyFrame{min-height:2600px}
}

/* Community */
.community{flex:1;display:flex;align-items:center;justify-content:center;padding:20px 16px}
.community-box{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:28px;width:min(94vw,460px);text-align:center}
.community-box h2{margin:0 0 8px}
.community-box p{color:var(--muted);font-size:15px;margin:0 0 18px}
.join-btn{display:block;width:100%;padding:13px;border-radius:10px;margin-bottom:10px;font-weight:700;text-decoration:none;color:#fff}
.join-btn.fb{background:#1877F2}
.join-btn.zalo{background:#0068FF}
.community-bar{font-size:14px;color:var(--muted);padding:8px 0;border-bottom:1px solid var(--border);margin-bottom:6px}
.community-bar a{color:var(--red);text-decoration:none;font-weight:600}

main{flex:1;display:flex;flex-direction:column;max-width:860px;width:100%;margin:0 auto;padding:0 16px;min-height:0}

.agent-picker{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:14px 0;color:var(--muted);font-size:14px}
.agent-btn{padding:8px 14px;border-radius:999px;border:1px solid var(--border);background:#111;color:var(--text);cursor:pointer;font-size:15px}
.agent-btn.active{background:var(--red);border-color:var(--red);color:#fff;font-weight:600}
.ghost{padding:8px 14px;border-radius:999px;border:1px solid var(--border);background:transparent;color:var(--muted);cursor:pointer;font-size:15px}

.chat{flex:1;overflow-y:auto;padding:8px 0 16px;display:flex;flex-direction:column;gap:14px;min-height:0}
.msg{max-width:88%;padding:14px 16px;border-radius:14px;line-height:1.7;font-size:17px;white-space:pre-wrap;word-wrap:break-word}
.msg.user{align-self:flex-end;background:var(--red);color:#fff;border-bottom-right-radius:4px}
.msg.bot{align-self:flex-start;background:var(--card);border:1px solid var(--border);border-bottom-left-radius:4px}
.msg.bot table{border-collapse:collapse;width:100%;margin:6px 0}
.msg.bot td,.msg.bot th{border:1px solid var(--border);padding:6px}

.composer{display:flex;gap:10px;align-items:flex-end;padding:10px 0;border-top:1px solid var(--border)}
#input{flex:1;resize:vertical;padding:12px;border-radius:12px;border:1px solid var(--border);background:#111;color:var(--text);font-family:inherit;font-size:17px}
.composer-actions{display:flex;flex-direction:column;gap:8px}
button.primary{padding:12px 18px;border:0;border-radius:12px;background:var(--red);color:#fff;font-weight:700;cursor:pointer}
button:disabled{opacity:.5;cursor:not-allowed}
.hint{color:var(--muted);font-size:14px;margin:2px 0 10px}

.typing{color:var(--muted);font-style:italic}
.download-bar{align-self:flex-start;margin:4px 0}
.download-bar button{padding:10px 16px;border:1px solid var(--red);border-radius:10px;background:transparent;color:var(--red);font-weight:600;cursor:pointer}

/* Schedule hub */
.schedule{flex:1;overflow-y:auto;width:100%;display:flex;justify-content:center;padding:24px 16px}
.sched-box{width:min(94vw,860px);align-self:flex-start}
.sched-box h2{margin:0 0 6px}
.sched-sub{color:var(--muted);font-size:15px;margin:0 0 20px}
.day-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.day-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px;display:flex;flex-direction:column}
.day-no{color:var(--red);font-weight:700;font-size:14px;letter-spacing:.5px}
.day-title{font-size:20px;font-weight:800;margin:4px 0 8px}
.day-card p{color:var(--muted);font-size:15px;margin:0 0 16px;flex:1}
.day-go{width:100%}
.sched-links{margin-top:20px;color:var(--muted);font-size:15px}
.sched-links a{color:var(--red);text-decoration:none;font-weight:600}