/* =====================================================================
   ELECTRICITY: MAGNETIC AND HEATING EFFECTS (CLASS 8) — Science Notes
   Figure wrappers, SVG styles, method 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.
   ===================================================================== */

.em-fig { display: flex; flex-direction: column; align-items: center; margin: 22px auto; max-width: 700px; }
.em-fig svg { display: block; width: 100%; height: auto; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; user-select: none; }
.em-caption { margin-top: 8px; font-size: 13px; color: #64748b; text-align: center; line-height: 1.5; }

.em-box { background: #f8fafc; border: 1px solid #e2e8f0; border-left: 4px solid #d97706; border-radius: 6px; padding: 16px 20px; margin: 18px 0; font-size: 14.5px; line-height: 1.7; color: #334155; }
.em-box-header { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: #b45309; margin-bottom: 8px; }
.em-step { margin-bottom: 8px; }
.em-step strong { color: #0f172a; }

.em-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; margin: 20px 0; }
.em-card { background: #fff; border: 1px solid #e2e8f0; border-radius: 8px; padding: 18px 20px; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04); }
.em-card h4 { margin: 0 0 8px; font-size: 15.5px; font-weight: 700; color: #0f172a; }
.em-card p { margin: 0 0 10px; font-size: 13.5px; color: #475569; line-height: 1.55; }
.em-badge { display: inline-block; font-size: 11.5px; font-weight: 700; text-transform: uppercase; color: #b45309; background: #fffbeb; border: 1px solid #fde68a; border-radius: 4px; padding: 2px 7px; margin-bottom: 8px; }
.em-badge-blue { color: #1d4ed8; background: #eff6ff; border-color: #bfdbfe; }
.em-badge-red { color: #b91c1c; background: #fef2f2; border-color: #fecaca; }
.em-badge-green { color: #15803d; background: #f0fdf4; border-color: #bbf7d0; }

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

.em-svg-line { fill: none; stroke: #0f172a; stroke-width: 1.8; }
.em-svg-thin { fill: none; stroke: #64748b; stroke-width: 1.2; }
.em-svg-t { font-size: 12.5px; font-weight: 600; fill: #1e293b; }
.em-svg-tb { font-size: 13px; font-weight: 700; fill: #2563eb; }
.em-svg-tr { font-size: 13px; font-weight: 700; fill: #dc2626; }
.em-svg-tg { font-size: 13px; font-weight: 700; fill: #b45309; }
.em-svg-tm { font-size: 11.5px; font-weight: 500; fill: #64748b; }