.series-difficulty-card{margin:0 0 1.5rem;border:1px solid rgba(227,221,208,.95);border-radius:var(--radius-md);background:rgba(255,253,248,.92);box-shadow:0 8px 20px rgba(20,18,15,.06);padding:clamp(1rem,2.4vw,1.5rem) clamp(1rem,2.4vw,1.75rem)}.series-difficulty-header h2{margin:0;font-family:var(--font-display);font-size:clamp(1.2rem,2vw,1.5rem);color:var(--ink-900)}.series-difficulty-header p{margin:.4rem 0 0;font-size:.95rem;color:var(--ink-500)}.series-difficulty-chart{margin-top:1rem}.series-difficulty-chart svg{display:block;width:100%;height:auto;font-family:var(--font-sans)}.difficulty-grid{stroke:var(--line);stroke-width:1;stroke-dasharray:3 5}.difficulty-band-label{fill:var(--ink-500);font-size:12px;font-weight:700;letter-spacing:.04em}.difficulty-band{opacity:.85;filter:blur(.6px)}.difficulty-trend{stroke:var(--pine);stroke-width:2.4;stroke-linecap:round;fill:none}.difficulty-edge-label{fill:var(--ink-500);font-size:11.5px;font-weight:600;letter-spacing:.02em}.series-difficulty-caption{margin:.85rem 0 0;font-size:.9rem;color:var(--ink-700);text-align:center;max-width:58ch;margin-left:auto;margin-right:auto}.series-difficulty-caption strong{color:var(--pine)}@media (max-width:680px){.difficulty-band-label{font-size:15px}.difficulty-edge-label{font-size:14px}.difficulty-trend{stroke-width:3.2}}