:root {
  --bg: #f4f6fb; --card: #ffffff; --ink: #111827; --muted: #6b7280;
  --accent: #1d4ed8; --line: #e5e7eb; --warn: #b45309; --urgent: #b91c1c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a; --card: #1e293b; --ink: #f1f5f9; --muted: #94a3b8;
    --accent: #60a5fa; --line: #334155; --warn: #fbbf24; --urgent: #f87171;
    --on-accent: #0f172a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
button {
  font: inherit; padding: 0.7rem 1rem; border: 0; border-radius: 0.6rem;
  background: var(--accent); color: var(--on-accent, #fff); cursor: pointer;
}
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button.link { background: none; color: var(--accent); padding: 0.3rem 0; }

.login { max-width: 22rem; margin: 12vh auto 0; padding: 0 1rem; text-align: center; }
.login h1 { margin: 0.5rem 0 1.5rem; }
.login form { display: grid; gap: 0.4rem; text-align: left; }
.login label { font-size: 0.9rem; color: var(--muted); margin-top: 0.6rem; }
.login input {
  font: inherit; padding: 0.7rem; border-radius: 0.6rem;
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
}
.login button { margin-top: 1.2rem; }
.error { color: var(--urgent); }

.bar {
  position: sticky; top: 0; display: flex; align-items: center; gap: 0.8rem;
  padding: 0.7rem 1rem; background: var(--card); border-bottom: 1px solid var(--line);
}
.bar .who { margin-left: auto; color: var(--muted); }
.bar form { margin: 0; }

.push { margin: 1rem; padding: 1rem; background: var(--card); border-radius: 0.8rem; border: 1px solid var(--line); }
.push p { margin: 0 0 0.8rem; }
.push button { margin-right: 0.5rem; }

.messages { max-width: 42rem; margin: 0 auto; padding: 1rem; display: grid; gap: 0.8rem; }
.message {
  background: var(--card); border-radius: 0.8rem; padding: 1rem;
  border: 1px solid var(--line); border-left: 4px solid var(--accent);
}
.message.warning { border-left-color: var(--warn); }
.message.urgent { border-left-color: var(--urgent); }
.message.operator { border-left-style: dashed; }
.message.unread h2 { font-weight: 700; }
.message header { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.message h2 { margin: 0; font-size: 1.05rem; font-weight: 500; }
.message time { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }
.message .body { margin: 0.6rem 0 0; white-space: pre-line; }
.message footer { margin-top: 0.6rem; display: flex; gap: 0.4rem; flex-wrap: wrap; }
.message footer:empty { display: none; }
.tag { font-size: 0.75rem; padding: 0.1rem 0.5rem; border-radius: 1rem; border: 1px solid var(--line); color: var(--muted); }
.tag.new { color: var(--accent); border-color: var(--accent); }
.empty { text-align: center; color: var(--muted); margin-top: 3rem; }