:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel2: #1f232c;
  --border: #2a2f3a;
  --text: #e7e9ee;
  --muted: #8b93a3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --success: #22c55e;
}

* { box-sizing: border-box; }

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

.hidden { display: none !important; }

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

.login-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 340px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-box h1 { margin: 0; font-size: 20px; }
.muted { color: var(--muted); font-size: 13px; margin: 0; }
.error { color: var(--danger); font-size: 13px; min-height: 18px; margin: 0; }

input, textarea, select {
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  width: 100%;
  font-family: inherit;
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  background: var(--accent);
  color: white;
}
button:hover { background: var(--accent-hover); }

.secondary-btn { background: var(--panel2); border: 1px solid var(--border); margin: 8px 8px 8px 0; }
.secondary-btn:hover { background: var(--border); }
.save-btn { background: var(--success); }
.link-btn { background: transparent; color: var(--muted); font-weight: 400; padding: 4px 8px; }
.danger-btn { background: var(--danger); padding: 6px 10px; font-size: 12px; }

.app { max-width: 1000px; margin: 0 auto; padding: 16px; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.topbar h1 { font-size: 18px; margin: 0; }
.topbar-right { display: flex; align-items: center; gap: 12px; }

.badge {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--panel2);
  border: 1px solid var(--border);
}
.badge.online { color: var(--success); border-color: var(--success); }
.badge.offline { color: var(--danger); border-color: var(--danger); }

.tabs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.tab-btn {
  background: transparent;
  color: var(--muted);
  font-weight: 500;
  border-radius: 8px 8px 0 0;
  padding: 10px 14px;
}
.tab-btn.active { background: var(--panel); color: var(--text); }
.tab-btn:hover { color: var(--text); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.card .value { font-size: 24px; font-weight: 700; margin: 4px 0; }
.card .label { color: var(--muted); font-size: 13px; }

.card-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
  max-width: 560px;
}
.card-form label { font-size: 13px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }

.item-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.item-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}
.item-card .text { font-size: 14px; white-space: pre-wrap; flex: 1; }
.item-card .meta { font-size: 12px; color: var(--muted); margin-top: 4px; }

.edit-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.edit-row { display: flex; gap: 8px; align-items: center; }
.edit-row input[type="text"] { flex: 1; }
.edit-row input[type="checkbox"] { width: auto; }

.logs-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-size: 12px;
  white-space: pre-wrap;
  max-height: 500px;
  overflow-y: auto;
  font-family: ui-monospace, monospace;
}

@media (max-width: 600px) {
  .app { padding: 10px; }
}