*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: #080b12;
  color: #fff;
  min-height: 100vh;
}
a { color: inherit; }
.app { display: flex; height: 100vh; }
.sidebar {
  width: 200px; flex-shrink: 0; background: #171B37;
  border-right: 1px solid rgba(84,104,224,0.18);
  display: flex; flex-direction: column; padding: 20px 0;
}
.sidebar .logo {
  padding: 0 20px 24px;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar .logo-img {
  height: 60px;
  width: auto;
  display: block;
  margin-left: -22px;
}
.sidebar a {
  display: block; padding: 12px 20px; font-size: 13px; font-weight: 600;
  color: rgba(255,255,255,0.55); text-decoration: none; border-left: 3px solid transparent;
}
.sidebar a.active, .sidebar a:hover { color: #fff; background: rgba(255,255,255,0.04); border-left-color: #3D7EFF; }
.sidebar .logout { margin-top: auto; }
.main { flex: 1; min-width: 0; overflow: auto; padding: 24px; }
.card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px; padding: 16px;
}
.btn {
  background: #3D7EFF; border: none; border-radius: 8px; padding: 8px 16px;
  color: #fff; font-size: 13px; font-weight: 600; cursor: pointer; font-family: inherit;
}
.btn:hover { background: #5a90ff; }
.btn.ghost { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); }
input[type=text], input[type=email], input[type=password] {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px; padding: 9px 12px; color: #fff; font-size: 14px; font-family: inherit; width: 100%;
}
.two-col { display: flex; height: 100%; gap: 16px; }
.list-col { width: 300px; flex-shrink: 0; overflow-y: auto; }
.list-row {
  padding: 12px; border-radius: 8px; cursor: pointer; margin-bottom: 6px;
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); font-size: 13px;
}
.list-row:hover { background: rgba(255,255,255,0.06); }
.list-row.active { border-color: #3D7EFF; background: rgba(61,126,255,0.1); }
.thread-col { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.msgs { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; padding: 8px 4px; }
.msg { max-width: 70%; padding: 8px 12px; border-radius: 10px; font-size: 13px; line-height: 1.4; word-break: break-word; }
.msg.mine { align-self: flex-end; background: #3D7EFF; }
.msg.theirs { align-self: flex-start; background: rgba(255,255,255,0.08); }
.msg.pinned { outline: 1px solid #ffb020; }
.reply-box { display: flex; gap: 8px; margin-top: 10px; }
.reply-box input { flex: 1; }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tabs button {
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: 8px;
  padding: 6px 14px; color: rgba(255,255,255,0.6); font-size: 12px; font-weight: 600; cursor: pointer; font-family: inherit;
}
.tabs button.active { color: #fff; background: rgba(61,126,255,0.2); border-color: #3D7EFF; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid rgba(255,255,255,0.06); }
th { color: rgba(255,255,255,0.5); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; }
.login-wrap { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-card { width: 340px; background: #171B37; border: 1px solid rgba(84,104,224,0.18); border-radius: 14px; padding: 28px; }
.login-card h1 { font-size: 16px; margin-bottom: 18px; }
.login-card label { display: block; font-size: 12px; color: rgba(255,255,255,0.5); margin: 12px 0 6px; }
.login-card .btn { width: 100%; margin-top: 18px; }
.error { color: #ff5a5a; font-size: 12px; margin-top: 10px; min-height: 14px; }
.msg-actions { display: flex; gap: 6px; margin-top: 4px; }
.msg-actions button { background: none; border: none; color: rgba(255,255,255,0.4); font-size: 11px; cursor: pointer; }
.msg-actions button:hover { color: #fff; }