/* ============================================================
   HANG TEN DESIGN SYSTEM v0.1 (mobile) — de-Flowtely-branded.
   Ocean/wave palette + WhatsApp-familiar chat layout.
   Tokens live here; provision to migrate to a shared DS component
   library later (keep component classes stable: .hdr .bubble .tile).
   ============================================================ */
:root{
  --ht-ink:#0B1B2B;            /* deep ocean text */
  --ht-teal:#0B5E5A;           /* brand header (WhatsApp-green analog) */
  --ht-teal-d:#083F3C;
  --ht-surf:#14B8A6;           /* accent / send */
  --ht-sky:#38BDF8;
  --ht-bg:#E9F1F0;             /* chat backdrop */
  --ht-panel:#ffffff;
  --ht-sent:#D6F3EC;           /* sent bubble (teal tint) */
  --ht-recv:#ffffff;           /* received bubble */
  --ht-muted:#64748B;
  --ht-line:#D9E2E1;
  --ht-shadow:0 1px 2px rgba(11,27,43,.12);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ht-ink);background:var(--ht-teal);overscroll-behavior:none}
#app{height:100dvh;max-width:520px;margin:0 auto;background:var(--ht-bg);position:relative;overflow:hidden}
.view{position:absolute;inset:0;display:none;flex-direction:column}
.view.active{display:flex}
.muted{color:var(--ht-muted)}
[hidden]{display:none!important}

/* header */
.hdr{display:flex;align-items:center;gap:10px;background:var(--ht-teal);color:#fff;
  padding:calc(env(safe-area-inset-top) + 12px) 12px 12px;min-height:56px}
.hdr-title{font-weight:700;font-size:17px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hdr-title.col{display:flex;flex-direction:column;line-height:1.15}
.hdr-title.col small{font-weight:400;font-size:12px;color:#B9E4DF}
.hdr-btn{background:transparent;border:0;color:#fff;font-size:15px;font-weight:600;padding:8px;cursor:pointer}
.hdr-btn.icon{font-size:26px;line-height:1;padding:2px 8px}
.hdr-avatar{width:38px;height:38px;border-radius:50%;background:#0e7a74;display:grid;place-items:center;
  font-weight:800;font-size:14px}

/* login */
#view-login{background:linear-gradient(160deg,var(--ht-teal),var(--ht-teal-d));color:#fff;justify-content:center}
.login-hero{text-align:center;padding:24px}
.login-hero .logo{font-size:56px}
.login-hero h1{font-size:38px;margin:.1em 0;letter-spacing:-.02em}
.login-hero .tag{color:#B9E4DF;margin:0 0 28px}
.gbtn{display:flex;justify-content:center;min-height:44px}
.login-msg{margin-top:16px;color:#FCA5A5;font-size:14px;min-height:18px}

/* picker */
.picker{padding:18px;overflow:auto}
.picker-hi{color:var(--ht-muted);margin:6px 2px 16px}
.picker-tiles{display:grid;gap:14px}
.tile{display:flex;align-items:center;gap:14px;background:var(--ht-panel);border:1px solid var(--ht-line);
  border-radius:16px;padding:18px;box-shadow:var(--ht-shadow);cursor:pointer;border-left:5px solid var(--accent,#14B8A6)}
.tile:active{transform:scale(.99)}
.tile-mark{width:46px;height:46px;border-radius:12px;background:var(--accent,#14B8A6);color:#fff;
  display:grid;place-items:center;font-weight:800}
.tile-name{font-weight:800;font-size:18px}
.tile-tag{color:var(--ht-muted);font-size:13px}

/* chat list */
.chat-list{list-style:none;margin:0;padding:0;flex:1;overflow:auto;background:var(--ht-panel)}
.chat-list li{display:flex;gap:12px;align-items:center;padding:14px 16px;border-bottom:1px solid var(--ht-line);cursor:pointer}
.chat-list li:active{background:#f2f7f6}
.ci-avatar{width:44px;height:44px;border-radius:50%;background:var(--ht-teal);color:#fff;display:grid;place-items:center;font-weight:700;flex:none}
.ci-body{flex:1;min-width:0}
.ci-title{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ci-sub{color:var(--ht-muted);font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.list-empty{padding:40px 20px;text-align:center;color:var(--ht-muted)}
.fab{position:absolute;right:18px;bottom:22px;width:56px;height:56px;border-radius:50%;border:0;
  background:var(--ht-surf);color:#fff;font-size:26px;box-shadow:0 6px 16px rgba(11,94,90,.4);cursor:pointer}

/* thread */
.thread{flex:1;overflow:auto;padding:14px;background:var(--ht-bg);
  background-image:radial-gradient(rgba(11,94,90,.05) 1px,transparent 1px);background-size:22px 22px}
.bubble{max-width:82%;padding:9px 12px;border-radius:12px;margin:0 0 9px;box-shadow:var(--ht-shadow);
  font-size:15px;line-height:1.4;white-space:pre-wrap;word-wrap:break-word}
.bubble.me{background:var(--ht-sent);margin-left:auto;border-top-right-radius:3px}
.bubble.agent{background:var(--ht-recv);margin-right:auto;border-top-left-radius:3px}
.bubble .meta{display:block;font-size:11px;color:var(--ht-muted);margin-top:4px}
.pending{color:#B45309}
.composer{display:flex;gap:8px;padding:8px calc(8px + env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) 8px;background:var(--ht-bg)}
#msg{flex:1;border:1px solid var(--ht-line);border-radius:22px;padding:11px 14px;font:inherit;background:#fff;resize:none;max-height:120px}
.send{width:46px;height:46px;border-radius:50%;border:0;background:var(--ht-surf);color:#fff;font-size:18px;cursor:pointer;flex:none}
.mic{width:46px;height:46px;border-radius:50%;border:1px solid var(--ht-line);background:#fff;font-size:19px;cursor:pointer;flex:none;line-height:1}
.mic.listening{background:#FEE2E2;border-color:#EF4444;animation:mic-pulse 1.2s ease-in-out infinite}
@keyframes mic-pulse{0%,100%{box-shadow:0 0 0 0 rgba(239,68,68,.5)}50%{box-shadow:0 0 0 8px rgba(239,68,68,0)}}