:root {
  --bg: #0f1419;
  --panel: #1a222c;
  --border: #2b3742;
  --text: #e6edf3;
  --muted: #8b97a3;
  --accent: #4c9aff;
  --ok: #6fd47a;
  --bad: #ff8080;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); }

.topbar {
  display: flex; align-items: center; gap: 20px;
  padding: 14px 24px; border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 16px; }
.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a { color: var(--muted); text-decoration: none; font-size: 13px; padding: 6px 12px; border-radius: 8px; }
.topbar nav a:hover { color: var(--text); background: var(--panel); }
.who { color: var(--muted); font-size: 13px; display: flex; align-items: center; gap: 10px; }
.who button { background: transparent; border: 1px solid var(--border); color: var(--muted); border-radius: 6px; padding: 4px 10px; cursor: pointer; font-size: 12px; }

.container { max-width: 1200px; margin: 0 auto; padding: 24px; }

.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 20px; margin-bottom: 20px;
}
.card h2 { margin-top: 0; font-size: 16px; }

.grid-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.grid-form .full { grid-column: 1 / -1; }
.grid-form label, .inline-form label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.grid-form input, .grid-form select,
.inline-form input, .inline-form select {
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 10px; font-size: 14px; margin-top: 2px;
}
.inline-form { display: flex; gap: 16px; align-items: flex-end; margin-bottom: 12px; }

button, .btn-secondary {
  background: var(--accent); color: #fff; border: none; border-radius: 8px;
  padding: 9px 18px; font-size: 14px; font-weight: 600; cursor: pointer; text-decoration: none;
  display: inline-block;
}
.btn-secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: .03em; }
tr:hover td { background: rgba(255,255,255,.02); }

.pill { font-size: 11px; padding: 2px 9px; border-radius: 999px; background: var(--border); color: var(--text); text-transform: capitalize; }
.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--bad); font-size: 13px; }

/* login page */
.login-wrap { max-width: 360px; margin: 100px auto; padding: 0 20px; }
.login-wrap .card { text-align: center; }

/* chat layout */
.chat-shell { display: grid; grid-template-columns: 260px 1fr; gap: 0; height: calc(100vh - 65px); }
.contacts { border-right: 1px solid var(--border); overflow-y: auto; padding: 12px; }
.contacts a { display: block; padding: 10px 12px; border-radius: 8px; color: var(--text); text-decoration: none; font-size: 14px; margin-bottom: 2px; }
.contacts a:hover { background: var(--panel); }
.contacts a.active { background: var(--panel); border: 1px solid var(--border); }
.conversation { display: flex; flex-direction: column; height: 100%; }
.messages { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 60%; padding: 8px 12px; border-radius: 12px; font-size: 14px; line-height: 1.4; }
.msg.mine { align-self: flex-end; background: var(--accent); color: #fff; }
.msg.theirs { align-self: flex-start; background: var(--panel); border: 1px solid var(--border); }
.msg-time { font-size: 10px; color: var(--muted); margin-top: 2px; }
.composer { display: flex; gap: 10px; padding: 16px; border-top: 1px solid var(--border); }
.composer input { flex: 1; background: var(--bg); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; font-size: 14px; }
.empty-state { display: flex; align-items: center; justify-content: center; height: 100%; color: var(--muted); }