:root {
  --bg: #0f1115;
  --bg-panel: #16181d;
  --bg-input: #21242b;
  --bg-subtle: #1c1f26;
  --border: #21242b;
  --border-input: #2c2f38;
  --text: #e8e8ea;
  --text-strong: #fff;
  --text-muted: #8a8f98;
  --text-faint: #4a4d57;
  --accent: #6c5ce7;
  --danger: #e74c3c;
  --success: #2ecc71;
}
:root.light {
  --bg: #f4f5f7;
  --bg-panel: #ffffff;
  --bg-input: #f0f1f3;
  --bg-subtle: #eef0f3;
  --border: #e3e5e9;
  --border-input: #d7d9de;
  --text: #23252b;
  --text-strong: #0f1115;
  --text-muted: #6b7078;
  --text-faint: #9a9da5;
  --accent: #6c5ce7;
  --danger: #e74c3c;
  --success: #2ecc71;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
body { background: var(--bg); color: var(--text); min-height: 100vh; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
}
.topbar .brand { font-weight: 700; color: var(--text-strong); font-size: 15px; }
.topbar nav { display: flex; gap: 18px; }
.topbar nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 8px;
}
.topbar nav a.active, .topbar nav a:hover { color: var(--text-strong); background: var(--bg-input); }
.topbar .user { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-muted); }
.topbar .user button {
  background: var(--bg-input); color: var(--text); border: none; padding: 6px 12px;
  border-radius: 8px; cursor: pointer; font-size: 12px;
}
#themeToggleBtn { font-size: 15px; padding: 6px 10px; }

.container { max-width: 900px; margin: 0 auto; padding: 24px; }

h1 { font-size: 20px; color: var(--text-strong); margin-bottom: 4px; }
.subtitle { font-size: 13px; color: var(--text-muted); margin-bottom: 24px; }

.field { margin-bottom: 14px; text-align: left; }
.field label {
  font-size: 11px; color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.5px; display: block; margin-bottom: 6px;
}
select, input, textarea {
  width: 100%; background: var(--bg-input); border: 1px solid var(--border-input); color: var(--text);
  padding: 12px 14px; border-radius: 10px; font-size: 14px;
}
textarea { resize: none; height: 60px; }

.btn { padding: 12px 18px; border-radius: 10px; border: none; font-size: 14px; font-weight: 700; cursor: pointer; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-secondary { background: var(--bg-input); color: var(--text); }

.card { background: var(--bg-panel); border-radius: 14px; padding: 18px; margin-bottom: 16px; }
.error { color: var(--danger); font-size: 13px; margin-top: 10px; }