:root {
  --bg: #f7f7f8;
  --card: #ffffff;
  --text: #1c1c1e;
  --muted: #6b6b70;
  --border: #e3e3e6;
  --accent: #2f6fed;
  --accent-text: #ffffff;
  --danger: #c0392b;
  --ok: #1e8e3e;
  --warn: #b8860b;
}

* { box-sizing: border-box; }

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

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 700; font-size: 18px; }

.user-menu { display: flex; gap: 16px; align-items: center; font-size: 14px; color: var(--muted); }
.user-menu a { color: var(--accent); text-decoration: none; }

.container { max-width: 960px; margin: 0 auto; padding: 24px; }

h1 { font-size: 22px; margin-bottom: 16px; }
h2 { font-size: 18px; margin-top: 32px; }

.actions { margin-bottom: 16px; display: flex; gap: 8px; }

.btn {
  display: inline-block;
  padding: 8px 16px;
  background: var(--accent);
  color: var(--accent-text);
  border: none;
  border-radius: 6px;
  text-decoration: none;
  font-size: 14px;
  cursor: pointer;
}
.btn-secondary { background: var(--card); color: var(--text); border: 1px solid var(--border); }

.topics { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.topics th, .topics td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
.topics th { background: var(--bg); font-weight: 600; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.badge-new { background: #fff4d6; color: var(--warn); }
.badge-published { background: #e3f6e8; color: var(--ok); }

.form { display: flex; flex-direction: column; gap: 14px; max-width: 480px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.form input, .form textarea {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
}

.error { color: var(--danger); font-size: 14px; }
.hint { color: var(--muted); font-size: 13px; margin-top: 24px; }

.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.auth-box {
  background: var(--card);
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--border);
  width: 320px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.auth-box h1 { margin: 0 0 8px; }
.auth-box label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.auth-box input {
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}