:root {
    /* Main Theme */
    --brand-primary: #1a56db;
    --brand-primary-rgb: 26, 86, 219;
    --brand-primary-accessible: #1a4ebc;
    --brand-primary-hover: #1e429f;
    --brand-neutral: #1E293B;
    --dark-bg: #0f172a;
    --white: #ffffff;

    /* Status & Alerts */
    --brand-warning: #f59e0b;
    --brand-warning-dark: #b45309;
    --brand-warning-soft: rgba(254, 243, 199, 0.4);
    --accent-blue: #3b82f6;

    /* Surfaces & Borders */
    --bg-main: #FDFDFD;
    --bg-card: #FFFFFF;
    --surface-1: #F8FAFC;
    --surface-2: #f1f5f9;
    --surface-soft: #fcfdfc;
    --border: #E2E8F0;
    --border-muted: #cbd5e1;

    /* Typography & Hierarchy */
    --font-headings: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    --text-main: #334155;
    --text-muted: #475569;
    --text-light: #64748B;
    /* New Calculator Palette (Premium Purple/Indigo) */
    --calc-accent: #6366F1;
    --calc-accent-soft: rgba(99, 102, 241, 0.1);
    --calc-accent-hover: #4F46E5;
    --calc-bg-subtle: #F8FAFC;
    --calc-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.08);
    --radius-calc: 32px;

    /* Responsive Layout Tokens */
    --max-width: 1440px;
    --sidebar-width: 320px; /* Élargissement pour plus de confort de lecture */
    --reading-width: 900px;
    --header-height: 80px;
}