:root{
/* --- Brand ---------------------------------------------------------- */
--rtt-green:#23372B;          /* huisstijlgroen — the one brand colour */
--rtt-green-hover:#2E4738;    /* only hover value in the sources */
--rtt-ink-green:#1E241F;      /* book body ink: black with a green undertone */
--rtt-sand:#C9A579;           /* zand — the only accent */
--rtt-sand-deep:#B98F4F;      /* sand on light backgrounds, links on hover */
--rtt-sand-tint:#F0E3D0;      /* sand at badge strength */
--rtt-black:#1A1A1A;          /* mono/one-colour reproduction */

/* --- Surfaces ------------------------------------------------------- */
--rtt-white:#FFFFFF;
--rtt-paper:#FAF8F3;          /* warm page — publishing surfaces */
--rtt-mist:#F4F6F4;           /* cool page — product/app surfaces */
--rtt-grey:#EFEFEF;           /* logo-sheet neutral */
--rtt-surface-sunken:#EEF1EE; /* quiet fills, ghost button hover */
--rtt-canvas:#F4F2EE;         /* presentation canvas behind sheets */

/* --- Text ----------------------------------------------------------- */
--rtt-text-1:#101713;         /* primary on cool surfaces */
--rtt-text-2:#5A6B5E;         /* secondary */
--rtt-text-3:#7C877E;         /* labels, placeholders */
--rtt-text-1-warm:#1E241F;    /* primary on paper */
--rtt-text-2-warm:#5A5647;    /* secondary on paper */
--rtt-text-3-warm:#8A8578;    /* labels on paper */
--rtt-text-disabled:#A3ADA4;

/* --- Lines ---------------------------------------------------------- */
--rtt-line:#E3E7E3;           /* cool hairline */
--rtt-line-strong:#D5DBD6;    /* input borders */
--rtt-line-warm:#E7E2D6;      /* card border on paper */
--rtt-line-warm-2:#E0DACC;    /* sheet border, rules on paper */
--rtt-line-warm-3:#F0EBE0;    /* faintest rule inside paper cards */
--rtt-line-dashed:#CFC8B8;    /* clear-space / margin guides */

/* --- Semantic ------------------------------------------------------- */
--rtt-success:#2F6B4F;
--rtt-warning:#B98F4F;
--rtt-error:#9A3B2F;
--rtt-disabled:#C6CDC7;

/* --- Series colours (one flat colour per imprint series) ------------- */
--rtt-series-nonfictie:#23372B;
--rtt-series-praktijk:#C9A579;
--rtt-series-essay:#FAF8F3;
--rtt-series-naslag:#1E241F;

/* --- Semantic aliases ---------------------------------------------- */
--surface-page:var(--rtt-paper);
--surface-page-cool:var(--rtt-mist);
--surface-card:var(--rtt-white);
--surface-brand:var(--rtt-green);
--surface-accent:var(--rtt-sand);
--surface-sunken:var(--rtt-surface-sunken);
--text-body:var(--rtt-text-1);
--text-body-print:var(--rtt-text-1-warm);
--text-muted:var(--rtt-text-2);
--text-label:var(--rtt-text-3);
--text-on-brand:var(--rtt-white);
--text-on-accent:var(--rtt-green);
--border-default:var(--rtt-line);
--border-print:var(--rtt-line-warm);
--focus-ring:rgba(35,55,43,0.10);
--link:var(--rtt-green);
--link-hover:var(--rtt-sand-deep);
}