:root {
  --ink: #1d2433;
  --muted: #5b6475;
  --line: #d9dde5;
  --bg: #f6f7f9;
  --card: #ffffff;
  --accent: #2c5cc5;
  --staff: #eef3fd;
  --error-bg: #fdecec;
  --error-ink: #8a1c1c;
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--ink); background: var(--bg); }
.bar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; }
.brand span { font-weight: 400; color: var(--muted); }
nav { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.who { color: var(--muted); font-size: 14px; overflow-wrap: anywhere; }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 24px; margin: 0 0 16px; overflow-wrap: anywhere; }
a { color: var(--accent); }
.stack { display: flex; flex-direction: column; gap: 8px; margin-top: 24px; }
.narrow { max-width: 420px; }
label { font-weight: 600; }
input, textarea { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--card); width: 100%; }
button, .button { font: inherit; padding: 8px 16px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; cursor: pointer; text-decoration: none; align-self: flex-start; }
button.secondary { background: var(--card); color: var(--accent); border: 1px solid var(--accent); }
button.link { background: none; color: var(--accent); padding: 0; text-decoration: underline; }
form.inline { display: inline; }
.hint { margin: 0; color: var(--muted); font-size: 14px; }
.error { background: var(--error-bg); color: var(--error-ink); padding: 10px 12px; border-radius: 6px; }
.empty { color: var(--muted); }
.threads { list-style: none; padding: 0; margin: 0; border: 1px solid var(--line); border-radius: 8px; background: var(--card); }
.threads li + li { border-top: 1px solid var(--line); }
.threads a { display: block; padding: 12px 16px; color: var(--ink); text-decoration: none; }
.threads a:hover { background: var(--bg); }
.threads .subject { display: block; overflow-wrap: anywhere; }
.threads .unread .subject { font-weight: 700; }
.threads .meta { color: var(--muted); font-size: 14px; }
.people { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 16px; }
.person { font-size: 13px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); overflow-wrap: anywhere; }
.person.staff { background: var(--staff); }
.messages { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.message { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; }
.message.staff { background: var(--staff); }
.from { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; overflow-wrap: anywhere; }
.from time { color: var(--muted); font-size: 14px; }
.body { white-space: pre-wrap; overflow-wrap: anywhere; margin-top: 8px; }
.attachments { margin: 8px 0 0; padding-left: 18px; }
.attachments a { overflow-wrap: anywhere; }
.size { color: var(--muted); font-size: 13px; }
.add-people { border-top: 1px solid var(--line); padding-top: 16px; }