.esd{text-align:left;margin:32px 0 0}.esd-title{font-family:var(--serif,Georgia, serif);letter-spacing:-.01em;margin:0 0 6px;font-size:24px;font-weight:600;line-height:1.2}h3.esd-title{font-size:20px}.esd-lede{color:var(--ink-75,#000000bf);margin:0 0 14px;font-size:16px;line-height:1.5}.esd-rows{gap:10px;margin:0;padding:0;list-style:none;display:grid}.esd-row{border:1px solid var(--border,#e4e4e4);background:var(--white,#fff);border-radius:16px;padding:12px 14px}.esd-row-head{align-items:baseline;gap:10px;margin:0;font-size:15px;display:flex}.esd-q{font-variant-numeric:tabular-nums;min-width:2.6em;font-weight:700}.esd-topic{min-width:0;color:var(--ink-75,#000000bf);overflow-wrap:anywhere;flex:auto}.esd-sec{font-variant-numeric:tabular-nums;color:var(--ink-60,#0009);flex:none;font-size:14px}.esd-sec-slow{color:var(--retry-ink,#805204);font-weight:600}.esd-blank{color:var(--ink-60,#0009);margin:6px 0 0;font-size:14px}.esd-note{color:var(--ink-75,#000000bf);overflow-wrap:anywhere;margin:8px 0 0;font-size:14px;line-height:1.5}.esd-note p{margin:0}.esd-note .katex{font-size:1em}.esd-chips{flex-wrap:wrap;gap:6px;margin:10px 0 0;display:flex}.esd-chip{border:1px solid var(--border,#e4e4e4);background:var(--white,#fff);min-height:40px;color:var(--ink,#000);font:600 14px var(--sans,system-ui, sans-serif);cursor:pointer;transition:background var(--mo-tick,.16s) ease, border-color var(--mo-tick,.16s) ease, color var(--mo-tick,.16s) ease;border-radius:999px;padding:8px 14px}.esd-chip:hover{border-color:var(--ink-40,#0006)}.esd-chip[aria-pressed=true]{background:var(--ink,#000);border-color:var(--ink,#000);color:var(--on-ink,#fff)}.esd-chip:focus-visible,.esd-more:focus-visible{outline:3px solid var(--correct,#2563eb);outline-offset:2px}.esd-more{font:600 15px var(--sans,inherit);color:var(--ink,#000);text-underline-offset:3px;cursor:pointer;background:0 0;border:0;margin:10px 0 0;padding:8px 0;text-decoration:underline}.esd-summary{background:var(--oat,#f5f3f1);border-radius:16px;margin:18px 0 0;padding:16px}.esd-bars{gap:8px;margin:0;padding:0;list-style:none;display:grid}.esd-bar{grid-template-columns:7.5em minmax(0,1fr) 2em;align-items:center;gap:10px;font-size:14px;display:grid}.esd-bar-name{font-weight:600}.esd-bar-track{background:var(--oat-deep,#e9e7e5);border-radius:999px;height:10px;overflow:hidden}.esd-bar-fill{background:var(--ink-40,#0006);height:100%;transition:width var(--mo-shift,.24s) var(--mo-ease,ease);border-radius:999px;display:block}.esd-bar-lead .esd-bar-fill{background:var(--retry-solid,#a66c08)}.esd-bar-open .esd-bar-name,.esd-bar-open .esd-bar-n{color:var(--ink-60,#0009);font-weight:500}.esd-bar-open .esd-bar-fill{border:1px dashed var(--ink-35,#00000059);box-sizing:border-box;background:0 0}.esd-bar-n{text-align:right;font-variant-numeric:tabular-nums;font-weight:700}.esd-time{color:var(--ink-75,#000000bf);margin:12px 0 0;font-size:14px;line-height:1.5}.esd-verdict{border:1px solid;border-radius:16px;margin:14px 0 0;padding:16px 18px}.esd-verdict-amber{background:var(--retry-tint,#fff8e8);border-color:var(--retry-border,#e9bc6a)}.esd-verdict-blue{background:var(--correct-tint,#2563eb1a);border-color:var(--correct-ring,#2563eb52)}.esd-verdict-line{margin:0;font-size:17px;font-weight:700;line-height:1.4}.esd-steps{margin:8px 0 0;padding-left:22px;font-size:15px;line-height:1.5}.esd-steps li+li{margin-top:4px}.esd-drill{min-height:48px;margin-top:14px;padding:10px 22px;font-size:16px;text-decoration:none}.esd-hint,.esd-wait,.esd-history{color:var(--ink-60,#0009);margin:12px 0 0;font-size:14px;line-height:1.5}@media (max-width:520px){.esd-bar{grid-template-columns:6.6em minmax(0,1fr) 1.6em;gap:8px}.esd-drill{width:100%}}@media (prefers-reduced-motion:reduce){.esd-bar-fill,.esd-chip{transition:none}}