:root {
  --bg: #0f1419;
  --card: #1a2332;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --danger: #ef4444;
  --ok: #22c55e;
  --page-max-width: 90%;
}
* { box-sizing: border-box; }
body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 24px 0;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}
h1 { font-size: 1.5rem; margin: 0 0 8px; }
.subtitle { color: var(--muted); margin-bottom: 24px; font-size: 0.9rem; }
.hidden { display: none !important; }
.page-wrap {
  width: var(--page-max-width);
  max-width: var(--page-max-width);
}
#appHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}
#appHeader h1 { margin: 0; }
.header-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-secondary {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: none;
  display: inline-block;
}
.btn-secondary:hover { color: var(--text); border-color: var(--text); }
section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
  width: 100%;
}
h2 { font-size: 1.1rem; margin: 0 0 16px; }
label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 6px; }
input[type="text"], input[type="password"], input[type="number"], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  margin-bottom: 12px;
  font-family: inherit;
  font-size: 0.9rem;
}
input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input.field-readonly,
input[readonly]:not([type="file"]) {
  opacity: 0.85;
  cursor: default;
  color: var(--muted);
}
textarea { min-height: 100px; resize: vertical; }
input[type="file"] { margin-bottom: 12px; font-size: 0.9rem; }
button {
  padding: 10px 18px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  margin-right: 8px;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-danger { background: var(--danger); color: #fff; padding: 6px 12px; font-size: 0.8rem; }
.login-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-bottom: 12px;
  min-height: 1.2em;
}
#toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  display: none;
  max-width: min(90vw, 560px);
  width: max-content;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  z-index: 300;
  font-size: 0.9rem;
}
#toast.ok { border-color: var(--ok); }
#toast.err { border-color: var(--danger); background: #2a1a1a; color: #fecaca; }