:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --ink: #1c2333;
  --muted: #717a90;
  --line: #e3e8f0;
  --primary: #3b5bff;
  --primary-ink: #fff;
  --danger: #e5484d;
  --ok: #1a9c5b;
  --shadow: 0 1px 3px rgba(20, 30, 60, 0.08), 0 6px 20px rgba(20, 30, 60, 0.06);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.pad { padding: 10px 14px; }
code { background: #eef1f7; padding: 1px 5px; border-radius: 4px; font-size: 12px; }

/* Buttons */
.btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}
.btn:hover { background: #f7f9fc; }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.primary { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }
.btn.primary:hover { filter: brightness(1.05); }
.btn.danger { color: var(--danger); border-color: #f3c9ca; }
.btn.danger:hover { background: #fdf0f0; }
.btn.ghost { background: transparent; }

/* Login */
.login-body { display: grid; place-items: center; min-height: 100vh; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
.login-card { width: 340px; padding: 28px; display: grid; gap: 12px; }
.login-card h1 { font-size: 20px; margin: 0; }
.login-card label, .modal-card label, .field { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.login-card input, .modal-card input, .field input {
  border: 1px solid var(--line); border-radius: 8px; padding: 9px 11px; font-size: 14px; color: var(--ink); background: #fff;
}
.field input:focus, .login-card input:focus { outline: 2px solid #c7d2ff; border-color: var(--primary); }
.error { color: var(--danger); font-size: 13px; margin: 4px 0 0; }

/* Topbar */
.topbar { display: flex; align-items: center; gap: 12px; padding: 12px 18px; background: #fff; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; }
.spacer { flex: 1; }

/* Layout */
.layout { display: grid; grid-template-columns: 280px 1fr; min-height: calc(100vh - 53px); }
.sidebar { border-right: 1px solid var(--line); background: #fafbfe; display: flex; flex-direction: column; }
.sidebar-head { display: flex; align-items: center; justify-content: space-between; padding: 14px; font-weight: 600; border-bottom: 1px solid var(--line); }
.app-list { list-style: none; margin: 0; padding: 6px; overflow-y: auto; flex: 1; }
.app-item { display: flex; align-items: center; gap: 8px; padding: 9px 11px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.app-item:hover { background: #eef1fb; }
.app-item.active { background: #e2e8ff; font-weight: 600; }
.app-item .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge { font-size: 10px; padding: 1px 6px; border-radius: 999px; margin-left: auto; }
.badge.off { background: #fde7e7; color: var(--danger); }

/* Editor */
.editor { padding: 22px 26px; overflow-y: auto; }
.empty { color: var(--muted); display: grid; place-items: center; height: 60vh; }
.editor-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.editor-head h2 { margin: 0 0 2px; font-size: 19px; word-break: break-all; }
.editor-actions { display: flex; align-items: center; gap: 10px; }
.switch { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink); }

.field-group { margin-bottom: 18px; }
.field-group h4 { margin: 0 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px 16px; }

.msg { margin-top: 14px; font-size: 13px; padding: 9px 12px; border-radius: 8px; }
.msg.ok { background: #e7f6ee; color: var(--ok); }
.msg.err { background: #fdecec; color: var(--danger); }

/* Modal */
.modal { position: fixed; inset: 0; background: rgba(18, 24, 40, 0.45); display: grid; place-items: center; z-index: 20; }
.modal-card { width: 420px; padding: 22px; display: grid; gap: 12px; }
.modal-card h3 { margin: 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 4px; }