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768px){.settings-layout{grid-template-columns:1fr}.settings-nav{flex-direction:row;overflow-x:auto;padding-bottom:var(--space-4);border-bottom:1px solid var(--color-border-subtle);margin-bottom:var(--space-4)}.settings-nav-item{white-space:nowrap}.plans-grid{grid-template-columns:1fr}}:root{--color-bg-primary: #0A0A0B;--color-bg-secondary: #111112;--color-bg-tertiary: #141415;--color-bg-elevated: #1A1A1B;--color-bg-hover: #1E1E1F;--color-border-subtle: #222223;--color-border-default: #2A2A2B;--color-border-strong: #333334;--color-text-primary: #FFFFFF;--color-text-secondary: #CCCCCC;--color-text-tertiary: #8A8A8A;--color-text-muted: #555555;--color-accent-primary: #6366F1;--color-accent-secondary: #8B5CF6;--color-accent-hover: #7C7FF2;--color-accent-muted: rgba(99, 102, 241, .1);--color-accent-border: rgba(99, 102, 241, .3);--color-success: #22C55E;--color-success-muted: rgba(34, 197, 94, .1);--color-warning: #F59E0B;--color-error: #EF4444;--color-error-muted: rgba(239, 68, 68, 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