:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #2a2f3a;
  --text: #e8eaed;
  --muted: #9aa0ab;
  --accent: #5b8cff;
  --accent-2: #3f6be0;
  --danger: #e0555b;
  --bubble-me: #3f6be0;
  --bubble-other: #262b36;
}

* { box-sizing: border-box; }

/* Garantit que l'attribut `hidden` cache bien l'élément,
   même quand une règle lui donne display: flex. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  display: grid;
  grid-template-columns: 300px 1fr;
  height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.sidebar__head {
  padding: 18px 16px 12px;
  border-bottom: 1px solid var(--border);
}

.sidebar__head h1 {
  margin: 0 0 8px;
  font-size: 20px;
}

.user {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.user__avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  object-fit: cover;
}

.user__name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.logout {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
}
.logout:hover { color: var(--text); border-color: var(--muted); }

/* ---------- Écran de connexion ---------- */
.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 10;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 34px;
  max-width: 380px;
  width: 100%;
  text-align: center;
}
.login-card h1 { margin: 0 0 8px; font-size: 24px; }
.login-card p { margin: 0 0 26px; color: var(--muted); }

.google-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: white;
  color: #202124;
  border: none;
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
}
.google-btn:hover { background: #f1f3f4; }

.status {
  margin: 18px 0 0;
  padding: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-word;
  text-align: left;
  max-height: 160px;
  overflow-y: auto;
}

.new-group {
  display: flex;
  gap: 8px;
  padding: 14px 16px;
}

.new-group input {
  flex: 1;
  min-width: 0;
  padding: 9px 11px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 14px;
}

.new-group button {
  width: 40px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}
.new-group button:hover { background: var(--accent-2); }

.group-list {
  list-style: none;
  margin: 0;
  padding: 4px 8px;
  overflow-y: auto;
  flex: 1;
}

.group-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 11px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
}
.group-item:hover { background: var(--panel-2); }
.group-item.active { background: var(--accent-2); color: white; }

.group-item .count {
  font-size: 12px;
  color: var(--muted);
}
.group-item.active .count { color: #dbe4ff; }

.empty {
  color: var(--muted);
  font-size: 13px;
  padding: 12px;
  text-align: center;
}

/* ---------- Chat ---------- */
.chat {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.chat__head {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.chat__head h2 { margin: 0; font-size: 18px; }

.btn-danger {
  border: 1px solid var(--danger);
  background: transparent;
  color: var(--danger);
  padding: 7px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
}
.btn-danger:hover { background: var(--danger); color: white; }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bubble {
  max-width: 68%;
  padding: 9px 13px;
  border-radius: 14px;
  background: var(--bubble-other);
  font-size: 15px;
  line-height: 1.35;
  word-wrap: break-word;
}
.bubble.me {
  align-self: flex-end;
  background: var(--bubble-me);
  color: white;
}
.bubble .meta {
  display: block;
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 3px;
}
.bubble.me .meta { color: #dbe4ff; }

.composer {
  display: flex;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
}
.composer input {
  flex: 1;
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 15px;
}
.composer button {
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  padding: 0 20px;
  font-size: 15px;
  cursor: pointer;
}
.composer button:hover { background: var(--accent-2); }

@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { max-height: 42vh; }
}