.settings-section { padding: 1rem; margin-bottom: 1rem; border: 1px solid var(--bs-border-color); border-radius: .5rem; }
.settings-section summary { font-size: 1.25rem; font-weight: 600; margin-bottom: .75rem; }
[data-bs-theme="dark"] .history-chart { background: #182230; border-color: #475569; }
[data-bs-theme="dark"] .history-chart text { fill: #cbd5e1; }
[data-bs-theme="dark"] .history-chart .close { stroke: #60a5fa; }
.history-chart .ema-fast { fill: none; stroke: #d946ef; stroke-width: 1.5; }
.history-chart .ema-slow { fill: none; stroke: #0891b2; stroke-width: 1.5; }
.history-chart .bollinger { fill: none; stroke: #94a3b8; stroke-width: 1; stroke-dasharray: 4 3; }