:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #f7f7f8;
  --card-bg: #ffffff;
  --border: #ddd;
  --accent: #6a5acd;
  --error: #b00020;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #eaeaea;
    --bg: #16171a;
    --card-bg: #1f2024;
    --border: #35363b;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--fg);
  background: var(--bg);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.header-logout {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  opacity: 0.85;
}

.brand {
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

h1 { margin-top: 0; }

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

@media (max-width: 560px) {
  .card-grid { grid-template-columns: 1fr; }
}

.card {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card-bg);
  text-decoration: none;
  color: var(--fg);
}

.card h2 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.card p { margin: 0; opacity: 0.8; font-size: 0.9rem; }

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 420px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
}

input, textarea {
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card-bg);
  color: var(--fg);
  font: inherit;
}

small { opacity: 0.7; }

button {
  padding: 0.55rem 1rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  cursor: pointer;
}

button.secondary {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
}

.error { color: var(--error); }

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.footer-link { margin-top: 2rem; font-size: 0.9rem; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 2rem;
  font-size: 0.9rem;
}

th, td {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid var(--border);
}

td.actions {
  display: flex;
  gap: 0.5rem;
}

td.actions form { flex-direction: row; }

.admin-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.admin-nav form { display: inline; }
.admin-nav button {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 0.3rem 0.6rem;
}

.unregistered-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.inline-row {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  max-width: none;
}

.inline-row .username { min-width: 140px; }
.inline-row input { flex: 1; }