.system-settings { max-width: 1080px; margin: 0 auto; color: var(--app-text); }
.system-settings__heading { margin-bottom: 24px; }
.system-settings__heading h1 { margin: 0 0 8px; font-size: 26px; font-weight: 700; letter-spacing: -.02em; }
.system-settings__heading p { margin: 0; color: var(--app-text-muted); font-size: 14px; }
.system-settings__tabs { position: relative; display: flex; gap: 6px; overflow-x: auto; padding: 6px; margin-bottom: 20px; border: 1px solid var(--app-border); border-radius: 12px; background: var(--app-surface); scrollbar-width: thin; }
.system-settings__tabs [role="tab"] { flex: 1 0 auto; padding: 12px 16px; border: 0; border-radius: 8px; background: transparent; color: var(--app-text-muted); font-size: 14px; font-weight: 600; white-space: nowrap; cursor: pointer; }
.system-settings__tabs [role="tab"]:hover { background: var(--app-surface-muted); color: var(--app-text); }
.system-settings__tabs [aria-selected="true"] { background: #eef2ff; color: #4338ca; box-shadow: inset 0 0 0 1px #dfe3fc; }
.system-settings__tabs [role="tab"]:focus-visible, .system-settings__panel:focus-visible { outline: 2px solid #6366f1; outline-offset: 2px; }
.system-settings__panel[hidden] { display: none; }
.system-settings__card, .system-settings .openviking-settings { padding: 28px; border: 1px solid var(--app-border); border-radius: 16px; background: var(--app-surface); box-shadow: 0 4px 20px #172b4d04; }
.system-settings__form { display: grid; gap: 24px; }
.system-settings__section-heading h2 { margin: 0 0 8px; font-size: 20px; font-weight: 650; }
.system-settings__section-heading p, .system-settings__hint { margin: 0; color: var(--app-text-muted); font-size: 14px; line-height: 1.7; }
.system-settings__fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.system-settings__field { min-width: 0; }
.system-settings__field--wide { grid-column: 1 / -1; }
.system-settings__field--compact { max-width: 360px; }
.system-settings__field label { display: block; margin-bottom: 8px; font-size: 14px; font-weight: 600; }
.system-settings__field input, .system-settings__field select, .system-settings__field textarea { display: block; box-sizing: border-box; width: 100%; min-height: 44px; padding: 11px 12px; border: 1px solid var(--app-border); border-radius: 8px; background: var(--app-surface); color: var(--app-text); font-size: 14px; }
.system-settings__field input:focus, .system-settings__field select:focus, .system-settings__field textarea:focus { outline: 2px solid #6366f1; outline-offset: 2px; }
.system-settings__field textarea { resize: vertical; font-family: ui-monospace, monospace; }
.system-settings__field p { margin: 8px 0 0; color: var(--app-text-muted); font-size: 13px; line-height: 1.65; }
.system-settings__logo { display: block; width: 56px; height: 56px; object-fit: contain; margin-top: 12px; border-radius: 8px; }
.system-settings__group { min-width: 0; margin: 0; padding: 0; border: 0; }
.system-settings__group legend { width: 100%; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--app-border); font-size: 15px; font-weight: 650; }
.system-settings__actions { position: sticky; bottom: 0; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 20px 0 0; background: var(--app-surface); border-top: 1px solid var(--app-border); }
.system-settings__actions span { color: var(--app-text-muted); font-size: 13px; }
.system-settings__error { padding: 12px 16px; color: #b42318; background: #fff0f3; border-radius: 8px; }
@media (max-width: 640px) {
  .system-settings__heading { margin-bottom: 18px; }
  .system-settings__tabs { margin-bottom: 16px; }
  .system-settings__tabs [role="tab"] { padding: 11px 14px; }
  .system-settings__card, .system-settings .openviking-settings { padding: 20px; }
  .system-settings__fields { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .system-settings__actions { align-items: stretch; flex-direction: column; gap: 12px; }
}