:root {
  --bg: #0b0d12;
  --bg-2: #0f121a;
  --panel: rgba(22, 26, 35, 0.72);
  --panel-solid: #161a23;
  --surface: #1b202b;
  --surface-2: #222836;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #eef1f6;
  --muted: #8b93a4;
  --accent: #7c93ff;
  --accent-strong: #6178f5;
  --danger: #ff5c63;
  --ok: #3fcf8e;
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --shadow: 0 16px 50px rgba(0, 0, 0, 0.45);
  --icon-user: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 12a4 4 0 1 0 0-8 4 4 0 0 0 0 8zm0 2c-4 0-8 2-8 6h16c0-4-4-6-8-6z'/%3E%3C/svg%3E");
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(124, 147, 255, 0.10), transparent 60%),
    radial-gradient(800px 500px at 0% 110%, rgba(63, 207, 142, 0.06), transparent 55%),
    var(--bg);
  color: var(--text);
  font: 15px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  letter-spacing: 0.1px;
}
button { font: inherit; cursor: pointer; color: inherit; }
[hidden] { display: none !important; }
svg { width: 22px; height: 22px; display: block; }

/* ---------- Login-Gate ---------- */
.gate {
  position: fixed; inset: 0;
  display: grid; place-items: center; grid-template-rows: 1fr auto;
  padding: 24px;
}
.gate-card {
  align-self: center;
  width: 100%; max-width: 370px;
  background: var(--panel-solid);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 34px 30px;
  display: flex; flex-direction: column; gap: 16px;
  box-shadow: var(--shadow);
}
.gate .logo {
  width: 56px; height: 56px; margin: 0 auto 2px;
  display: grid; place-items: center;
  border-radius: var(--r-md);
  background: linear-gradient(160deg, rgba(124,147,255,0.22), rgba(124,147,255,0.06));
  border: 1px solid var(--border-strong);
  color: var(--accent);
}
.gate .logo svg { width: 28px; height: 28px; }
.gate .eyebrow { margin: 2px 0 -10px; text-align: center; color: var(--accent); font-size: 12px; font-weight: 750; letter-spacing: 2.5px; }
.gate h1 { margin: 0; text-align: center; font-size: 25px; font-weight: 650; letter-spacing: -0.2px; }
.gate .sub { margin: -8px 0 6px; text-align: center; color: var(--muted); font-size: 13px; }
.gate label { display: flex; flex-direction: column; gap: 7px; font-size: 12.5px; color: var(--muted); font-weight: 500; }
.gate input {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 13px 14px;
  font-size: 16px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.gate input::placeholder { color: #5b6273; }
.gate input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,147,255,0.16); }
.gate button {
  margin-top: 8px;
  background: var(--accent-strong);
  color: #fff;
  border: none;
  border-radius: var(--r-sm);
  padding: 14px;
  font-size: 15.5px;
  font-weight: 600;
  transition: background 0.15s, transform 0.05s;
}
.gate button:hover { background: var(--accent); }
.gate button:active { transform: translateY(1px); }
.gate button:disabled { opacity: 0.6; cursor: default; }
.error { color: var(--danger); font-size: 13px; text-align: center; margin: 2px 0 0; }
.gate-foot { color: #4d5466; font-size: 12px; letter-spacing: 0.3px; margin: 0; padding-bottom: 6px; }

/* ---------- App-Layout ---------- */
.app { display: flex; flex-direction: column; height: 100%; }

.topbar {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 16px;
  background: var(--panel);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  z-index: 5;
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; font-size: 15px; }
.brand svg { width: 20px; height: 20px; color: var(--accent); flex-shrink: 0; }
.brand .vr { color: var(--accent); font-weight: 750; letter-spacing: 0.4px; }
.spacer { flex: 1; }
.pill {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; color: var(--muted);
  background: var(--surface); border: 1px solid var(--border);
  padding: 5px 11px; border-radius: 999px;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); transition: background 0.2s; }
.pill.ok .dot { background: var(--ok); box-shadow: 0 0 0 3px rgba(63,207,142,0.18); }
.pill.bad .dot { background: var(--danger); box-shadow: 0 0 0 3px rgba(255,92,99,0.18); }
.count {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 12.5px; color: var(--muted); font-variant-numeric: tabular-nums;
  background: var(--surface); border: 1px solid var(--border);
  padding: 5px 11px; border-radius: 999px;
}
.count::before {
  content: ""; width: 13px; height: 13px;
  background: currentColor;
  -webkit-mask: var(--icon-user) center/contain no-repeat;
  mask: var(--icon-user) center/contain no-repeat;
}
.iconbtn {
  display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  width: 40px; height: 40px; border-radius: 11px;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.iconbtn:hover { background: var(--surface-2); border-color: var(--border-strong); }
.iconbtn.active { color: var(--accent); border-color: rgba(124,147,255,0.4); background: rgba(124,147,255,0.12); }
.iconbtn.danger:hover { color: var(--danger); border-color: rgba(255,92,99,0.45); background: rgba(255,92,99,0.12); }

.stage { flex: 1; display: flex; min-height: 0; }

/* ---------- Videos ---------- */
/* Kacheln tilen IMMER exakt den verfügbaren Bereich (1fr-Reihen) — kein
   Überlauf hinter Topbar/Steuerleiste, unabhängig vom Videoformat. */
.videos {
  flex: 1; min-width: 0; min-height: 0;
  display: grid; gap: 12px; padding: 14px;
  overflow: hidden;
  grid-template-columns: 1fr; grid-auto-rows: 1fr;
}
.videos.n-2 { grid-template-columns: 1fr 1fr; grid-auto-rows: 1fr; }
.videos.n-3, .videos.n-4 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }

.tile {
  position: relative;
  background: #05070b;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  min-height: 0;
  display: grid; place-items: center;
}
.tile video { width: 100%; height: 100%; object-fit: cover; background: #05070b; }
.tile.speaking { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent) inset; }
.tile .label {
  position: absolute; left: 10px; bottom: 10px;
  background: rgba(8, 10, 15, 0.62);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  color: #fff; padding: 4px 10px; border-radius: 8px; font-size: 12px; font-weight: 500;
  display: flex; align-items: center; gap: 6px;
  border: 1px solid var(--border);
}
.tile .avatar {
  position: absolute; inset: 0; display: grid; place-items: center;
  color: #3a4150;
  background: radial-gradient(120px 120px at 50% 42%, #161b25, #0a0d13);
}
.tile .avatar svg { width: 46px; height: 46px; }
.tile.has-video .avatar { display: none; }

/* ---- Ansichtsmodus „Anpassen": ganzes Video sichtbar (nichts beschnitten) ----
   Gleiches Grid wie „Füllen" (Kacheln passen exakt in den Bereich), aber das
   Video wird vollständig in die Kachel eingepasst statt formatfüllend beschnitten. */
body.view-fit .tile video { object-fit: contain; }

/* ---------- Chat ---------- */
.chat {
  width: 330px; flex-shrink: 0;
  background: var(--panel-solid);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
}
.chat.hidden { display: none; }
.chat-head { padding: 14px 16px; border-bottom: 1px solid var(--border); font-weight: 600; font-size: 14px; }
.messages { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 9px; }
.msg { max-width: 86%; }
.msg .who { font-size: 11px; color: var(--muted); margin: 0 0 3px 2px; }
.msg .bubble {
  background: var(--surface); border: 1px solid var(--border);
  padding: 8px 12px; border-radius: 13px; border-bottom-left-radius: 5px;
  word-wrap: break-word; white-space: pre-wrap; font-size: 14px;
}
.msg.me { align-self: flex-end; }
.msg.me .bubble { background: var(--accent-strong); border-color: var(--accent-strong); color: #fff; border-radius: 13px; border-bottom-right-radius: 5px; }
.msg.me .who { text-align: right; margin: 0 2px 3px 0; }
.msg.system { align-self: center; max-width: 100%; }
.msg.system .bubble { background: transparent; border: none; color: var(--muted); font-size: 12px; padding: 2px; }
.chat-form { display: flex; gap: 9px; padding: 12px; border-top: 1px solid var(--border); }
.chat-form input {
  flex: 1; background: var(--surface); border: 1px solid var(--border); color: var(--text);
  border-radius: var(--r-sm); padding: 11px 13px; outline: none; font-size: 14.5px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.chat-form input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,147,255,0.14); }
.chat-form button {
  display: grid; place-items: center;
  background: var(--accent-strong); color: #fff; border: none; border-radius: var(--r-sm);
  width: 46px; flex-shrink: 0; transition: background 0.15s;
}
.chat-form button:hover { background: var(--accent); }

/* ---------- Controls ---------- */
.controls {
  display: flex; justify-content: center; gap: 12px;
  padding: 16px;
  background: var(--panel);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border);
}
.ctrl {
  display: grid; place-items: center;
  width: 54px; height: 54px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.05s;
}
.ctrl:hover { background: var(--surface-2); border-color: var(--border-strong); }
.ctrl:active { transform: translateY(1px); }
.ctrl.active { background: rgba(124,147,255,0.16); border-color: var(--accent); color: var(--accent); }
.ctrl.off {
  background: rgba(255,92,99,0.16); border-color: rgba(255,92,99,0.5); color: var(--danger);
}

/* ---------- Mobile ---------- */
@media (max-width: 760px) {
  .stage { flex-direction: column; }
  .chat { width: auto; height: 42%; border-left: none; border-top: 1px solid var(--border); }
  .chat.hidden { display: none; }
  .videos { padding: 10px; gap: 10px; }
  /* Hochformat-Phone: Kacheln nebeneinander, Reihen teilen sich die Höhe (1fr),
     damit nichts hinter Topbar/Steuerleiste verschwindet. */
  .videos.n-2 { grid-template-columns: 1fr 1fr; grid-auto-rows: 1fr; }
  .videos.n-3, .videos.n-4 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }
  .ctrl { width: 50px; height: 50px; }
  .controls { gap: 14px; padding: 14px; }
  .topbar { padding: 10px 13px; }
}