:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1c1e21;
  --muted: #65676b;
  --border: #dadde1;
  --primary: #2f6fed;
  --primary-hover: #2459c4;
  --error-bg: #fdecec;
  --error-text: #a12622;
  --ok-bg: #e7f6ec;
  --ok-text: #1d6b35;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17181b;
    --card: #222327;
    --text: #e8e9ec;
    --muted: #a0a3a9;
    --border: #3a3c42;
    --primary: #5b8df5;
    --primary-hover: #7aa3f7;
    --error-bg: #3d1f1f;
    --error-text: #f2a6a3;
    --ok-bg: #1d3526;
    --ok-text: #94dba9;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.center {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  width: 100%;
  max-width: 400px;
}

.card.wide { max-width: 640px; }

h1 { margin: 0 0 4px; font-size: 1.5rem; }
h2 { margin: 0 0 12px; font-size: 1.15rem; }
.sub { margin: 0 0 20px; color: var(--muted); }

label { display: block; font-weight: 600; font-size: 0.9rem; margin: 14px 0 4px; }

input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

input:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

button {
  margin-top: 18px;
  width: 100%;
  padding: 11px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover { background: var(--primary-hover); }
button:disabled { opacity: 0.6; cursor: wait; }

.button-link {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}

.button-link:hover { background: var(--primary-hover); }

button.secondary {
  width: auto;
  margin: 0;
  padding: 8px 14px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

button.secondary:hover { background: var(--bg); }

.message { margin-top: 14px; padding: 10px 12px; border-radius: 8px; font-size: 0.95rem; }
.message.error { background: var(--error-bg); color: var(--error-text); }
.message.ok { background: var(--ok-bg); color: var(--ok-text); }

.footer-link { margin-top: 18px; text-align: center; font-size: 0.9rem; color: var(--muted); }
a { color: var(--primary); }

.page { max-width: 720px; margin: 0 auto; padding: 24px 16px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
}

.page .card { max-width: none; margin-bottom: 20px; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  vertical-align: middle;
}

.invite-row { display: flex; gap: 8px; }
.invite-row input { flex: 1; }
.invite-row button { width: auto; margin-top: 0; white-space: nowrap; }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 8px 4px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
td { word-break: break-all; }

@media (max-width: 480px) {
  .invite-row { flex-direction: column; }
  .invite-row button { width: 100%; }
}