/* =====================================================================
   WE DISTRIBUTE, YET THINGS MULTIPLY (CLASS 8) — Maths Notes
   Figure wrappers, SVG styles, proof boxes, tables and cards.
   Base styles (.notes-page-wrap, .notes-toc, .topic-section, .concept-card,
   .formula-box, .definition-box, .props-list) come from /css/notes-content.css.
   ===================================================================== */

.wd-fig { display: flex; flex-direction: column; align-items: center; margin: 22px auto; max-width: 480px; }
.wd-fig svg { display: block; width: 100%; height: auto; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; user-select: none; }
.wd-caption { margin-top: 8px; font-size: 13px; color: #64748b; text-align: center; line-height: 1.5; }

.proof-box { background: #f8fafc; border: 1px solid #e2e8f0; border-left: 4px solid #2563eb; border-radius: 6px; padding: 16px 20px; margin: 18px 0; font-size: 14.5px; line-height: 1.7; color: #334155; }
.proof-header { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: #2563eb; margin-bottom: 8px; }
.proof-step { margin-bottom: 8px; }
.proof-step strong { color: #0f172a; }

.wd-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin: 20px 0; }
.wd-card { background: #fff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 18px 20px; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04); }
.wd-card h4 { margin: 0 0 8px; font-size: 15.5px; font-weight: 700; color: #0f172a; }
.wd-card p { margin: 0 0 10px; font-size: 13.5px; color: #475569; line-height: 1.55; }
.wd-badge { display: inline-block; font-size: 11.5px; font-weight: 700; text-transform: uppercase; color: #2563eb; background: #eff6ff; border: 1px solid #bfdbfe; border-radius: 4px; padding: 2px 7px; margin-bottom: 8px; }
.wd-badge-r { color: #dc2626; background: #fef2f2; border-color: #fecaca; }
.wd-badge-g { color: #16a34a; background: #f0fdf4; border-color: #bbf7d0; }

.wd-table-wrap { overflow-x: auto; margin: 16px 0; }
.wd-table { width: 100%; border-collapse: collapse; font-size: 13.5px; line-height: 1.55; color: #334155; }
.wd-table th, .wd-table td { border: 1px solid #e2e8f0; padding: 8px 10px; text-align: left; vertical-align: top; }
.wd-table th { background: #f1f5f9; color: #0f172a; font-weight: 700; }

/* SVG helpers */
.wd-r-a { fill: #dbeafe; stroke: #2563eb; stroke-width: 1.6; }
.wd-r-g { fill: #dcfce7; stroke: #16a34a; stroke-width: 1.6; }
.wd-r-r { fill: #fee2e2; stroke: #dc2626; stroke-width: 1.6; }
.wd-svg-t { font-size: 14px; font-weight: 700; fill: #1e293b; }
.wd-svg-tm { font-size: 12px; font-weight: 600; fill: #475569; }
.wd-svg-arrow { fill: none; stroke: #94a3b8; stroke-width: 1.6; }
.wd-svg-head { fill: #94a3b8; }