* { box-sizing: border-box; margin: 0; }
:root {
  --bg: #0f1216; --panel: #171c23; --panel2: #1f2630;
  --text: #e8ecf1; --muted: #8b96a5; --accent: #3d8bfd;
  --bubble-me: #2457a8; --bubble-them: #232b36;
}
html, body { height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font: 16px/1.45 -apple-system, "Segoe UI", Roboto, sans-serif;
  overscroll-behavior: none;
}
section { position: fixed; inset: 0; display: flex; flex-direction: column; background: var(--bg); }
[hidden] { display: none !important; }

.bar {
  display: flex; align-items: center; gap: 10px;
  padding: calc(env(safe-area-inset-top) + 10px) 14px 10px;
  background: var(--panel); border-bottom: 1px solid #000;
}
.bar .title { font-weight: 600; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #d9534f; }
.dot.on { background: #4caf50; }
.emoji { font-size: 15px; letter-spacing: 2px; }

.center-card {
  margin: auto; text-align: center; padding: 28px; max-width: 340px; width: 100%;
  display: flex; flex-direction: column; gap: 14px;
}
.logo { font-size: 52px; }
h1 { font-size: 26px; }
.muted { color: var(--muted); font-size: 14px; }
.pad { padding: 24px; text-align: center; }

input[type=text] {
  width: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid #2a3340;
  background: var(--panel2); color: var(--text); font-size: 16px; outline: none;
}
input[type=text]:focus { border-color: var(--accent); }

button {
  padding: 12px 16px; border-radius: 12px; border: 0; font-size: 16px; font-weight: 600;
  background: var(--panel2); color: var(--text); cursor: pointer;
}
button.primary { background: var(--accent); color: #fff; }
button.ghost { background: transparent; color: var(--muted); }
button.round { border-radius: 50%; width: 44px; height: 44px; padding: 0; flex: none; }

#contact-list { flex: 1; overflow-y: auto; }
.contact {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  border-bottom: 1px solid #1c222b; cursor: pointer;
}
.contact:active { background: var(--panel); }
.avatar {
  width: 44px; height: 44px; border-radius: 50%; background: var(--panel2); flex: none;
  display: flex; align-items: center; justify-content: center; font-size: 19px; font-weight: 700;
}
.contact .info { flex: 1; min-width: 0; }
.contact .name { font-weight: 600; }
.contact .last { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.badge {
  background: var(--accent); color: #fff; border-radius: 10px; min-width: 20px; height: 20px;
  font-size: 12px; display: flex; align-items: center; justify-content: center; padding: 0 6px;
}

.bottom { padding: 12px 16px calc(env(safe-area-inset-bottom) + 12px); }
.bottom button { width: 100%; }

.sheet {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
  background: var(--panel); border-radius: 18px 18px 0 0; padding: 20px 16px calc(env(safe-area-inset-bottom) + 16px);
  display: flex; flex-direction: column; gap: 12px; box-shadow: 0 -8px 30px rgba(0,0,0,.5);
}
.link-box {
  background: var(--panel2); border-radius: 10px; padding: 10px; font-size: 12px;
  word-break: break-all; color: var(--muted); max-height: 84px; overflow-y: auto;
}

#messages { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 6px; }
.msg { max-width: 78%; padding: 9px 13px; border-radius: 16px; word-wrap: break-word; white-space: pre-wrap; }
.msg.me { align-self: flex-end; background: var(--bubble-me); border-bottom-right-radius: 5px; }
.msg.them { align-self: flex-start; background: var(--bubble-them); border-bottom-left-radius: 5px; }
.msg time { display: block; font-size: 10px; color: rgba(255,255,255,.45); margin-top: 3px; text-align: right; }
.sysline { align-self: center; color: var(--muted); font-size: 12px; padding: 6px 0; text-align: center; }

.composer {
  display: flex; gap: 8px; padding: 10px 12px calc(env(safe-area-inset-bottom) + 10px);
  background: var(--panel);
}
.composer input { flex: 1; }

.error { color: #e57373; font-size: 14px; }

#update-banner {
  position: fixed; top: calc(env(safe-area-inset-top) + 10px); left: 12px; right: 12px; z-index: 60;
  background: var(--panel2); border: 1px solid var(--accent); border-radius: 14px;
  padding: 10px 14px; display: flex; align-items: center; justify-content: space-between; gap: 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,.5); font-size: 14px;
}
#update-banner button { padding: 8px 14px; font-size: 14px; }

.ttl-opt.active { outline: 2px solid var(--accent); }

#toast {
  position: fixed; top: calc(env(safe-area-inset-top) + 16px); left: 50%; transform: translateX(-50%);
  background: var(--panel2); padding: 10px 18px; border-radius: 12px; z-index: 50;
  box-shadow: 0 4px 20px rgba(0,0,0,.5); font-size: 14px; white-space: nowrap;
}