#isrd, #isrd * {box-sizing:border-box}
#isrd{--ink:#15253b;--muted:#52657c;--blue:#124b89;--blue2:#eaf3fc;--line:#dce6f1;--surface:#fff;--orange:#bc5c0b;--ok:#14653b;--error:#a52b32;isolation:isolate;max-width:1020px;margin:24px auto 36px;padding:0 15px;color:var(--ink);background:transparent;font:400 16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
#isrd h1,#isrd h2,#isrd h3,#isrd p{margin-top:0;color:inherit}
#isrd h1{font-size:clamp(1.9rem,3.8vw,2.65rem);line-height:1.16;letter-spacing:-.035em;margin:0 0 12px;font-weight:800}
#isrd h2{font-size:clamp(1.22rem,2.6vw,1.65rem);line-height:1.3;font-weight:750;letter-spacing:-.018em;margin:0 0 11px}
#isrd h3{font-size:1.07rem;line-height:1.4;font-weight:750;margin:0 0 7px}
#isrd p{margin-bottom:13px}
#isrd a{color:var(--blue);font-weight:650;text-underline-offset:3px}
#isrd a:hover{text-decoration-thickness:2px}
#isrd button,#isrd input,#isrd select{font:inherit;letter-spacing:normal}
#isrd button{cursor:pointer}
#isrd button:disabled{cursor:not-allowed;opacity:.57}
#isrd :is(button,input,select,summary,a):focus-visible{outline:3px solid #ee9700;outline-offset:3px}
#isrd .isrd-kicker{display:inline-block;background:#e6f1ff;color:#164879;border:1px solid #bbd5f2;border-radius:40px;padding:4px 11px;font-size:.76rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase;margin-bottom:13px}
#isrd .isrd-intro{max-width:760px;font-size:1.04rem;color:var(--muted);margin-bottom:24px}
#isrd .isrd-grid{display:grid;grid-template-columns:minmax(0,1.58fr) minmax(222px,.85fr);gap:17px;align-items:start}
#isrd .isrd-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:0 6px 30px rgba(14,44,81,.045);padding:clamp(17px,3vw,30px)}
#isrd .isrd-feature{border-top:5px solid #1a65ab}
#isrd .isrd-eyebrow{font-size:.75rem;font-weight:800;text-transform:uppercase;letter-spacing:.075em;color:var(--blue)}
#isrd .isrd-metadata{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:0 0 18px}
#isrd .isrd-chip{display:inline-flex;align-items:center;padding:3px 9px;border:1px solid #cedfeb;border-radius:30px;font-size:.8rem;font-weight:700;color:#274767;background:#f6faff}
#isrd .isrd-question{font-size:clamp(1.28rem,2.9vw,1.83rem);line-height:1.43;font-weight:750;letter-spacing:-.013em;margin:8px 0 21px;overflow-wrap:anywhere}
#isrd .isrd-label{display:block;font-weight:700;font-size:.92rem;margin:0 0 6px}
#isrd .isrd-guess{width:100%;min-width:0;border:1.5px solid #adbfce;border-radius:10px;padding:12px 14px;min-height:48px;background:#fff;color:#172e45}
#isrd .isrd-guess::placeholder{color:#637991;opacity:1}
#isrd .isrd-actions{display:flex;flex-wrap:wrap;gap:9px;margin:13px 0}
#isrd .isrd-btn{display:inline-flex;align-items:center;justify-content:center;border:1.5px solid #b8c9d8;background:#fff;border-radius:10px;padding:10px 15px;min-height:43px;color:#163952;font-size:.91rem;font-weight:700;line-height:1.35;text-align:center;white-space:normal;transition:background-color .15s,border-color .15s}
#isrd .isrd-btn:hover:not(:disabled){background:#edf5fd;border-color:#4b87bf}
#isrd .isrd-btn--primary{color:#fff;background:#135797;border-color:#135797}
#isrd .isrd-btn--primary:hover:not(:disabled){background:#0b4074;border-color:#0b4074}
#isrd .isrd-btn--soft{background:#fff8ec;color:#82450b;border-color:#e9ceaa}
#isrd .isrd-btn--soft:hover:not(:disabled){background:#ffefcf;border-color:#c88830}
#isrd .isrd-divider{border:0;border-top:1px solid var(--line);margin:17px 0}
#isrd .isrd-hint,#isrd .isrd-answer{padding:14px 16px;border-radius:12px;margin-top:11px}
#isrd .isrd-hint{background:#fff9ee;border:1px solid #edd4a9}
#isrd .isrd-answer{background:#f0faf4;border:1px solid #a8d8b8}
#isrd .isrd-hint strong,#isrd .isrd-answer strong{display:block;font-size:.86rem;margin-bottom:4px}
#isrd .isrd-answer-title{font-size:1.22rem;font-weight:800;color:#0e5a33;margin:0 0 5px}
#isrd .isrd-feedback{font-size:.92rem;min-height:1.55em;font-weight:700;margin:9px 0;color:var(--muted)}
#isrd .isrd-feedback[data-tone="error"]{color:var(--error)}
#isrd .isrd-feedback[data-tone="success"]{color:var(--ok)}
#isrd .isrd-caption{font-size:.83rem;line-height:1.55;color:var(--muted);margin:7px 0 0}
#isrd .isrd-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}
#isrd .isrd-stat{background:#f5f9ff;border:1px solid #e3eef9;border-radius:12px;padding:12px}
#isrd .isrd-number{font-size:1.5rem;font-weight:850;line-height:1.2;color:#144f8a;font-variant-numeric:tabular-nums;display:block}
#isrd .isrd-stat-label{font-size:.82rem;color:#4c647d;font-weight:700}
#isrd .isrd-countdown{font-variant-numeric:tabular-nums;font-size:1.36rem;font-weight:850;letter-spacing:.028em;color:#123f71;margin:4px 0}
#isrd .isrd-side>*+*{margin-top:15px}
#isrd .isrd-panel{border:1px solid var(--line);border-radius:17px;background:#fff;padding:20px;margin-top:19px}
#isrd .isrd-practice-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px;margin:12px 0 14px}
#isrd select{display:block;width:100%;min-width:0;color:var(--ink);background:#fff;border:1px solid #aabfcd;border-radius:9px;padding:9px 11px;min-height:43px}
#isrd .isrd-archive{display:grid;gap:9px}
#isrd .isrd-archive details{border:1px solid var(--line);border-radius:11px;padding:10px 14px;background:#fff}
#isrd .isrd-archive summary{cursor:pointer;color:#244e78;font-weight:700;line-height:1.5}
#isrd .isrd-archive details[open]{background:#f8fbff}
#isrd .isrd-archive-answer{margin:9px 0 2px;border-left:3px solid #8db4d8;padding-left:12px}
#isrd .isrd-more{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px}
#isrd .isrd-more a{display:block;border-radius:11px;border:1px solid #d5e4f3;background:#f7fbff;padding:14px;text-decoration:none;line-height:1.45}
#isrd .isrd-more a:hover{background:#ecf5fe;border-color:#90b6db}
#isrd .isrd-more a span{font-size:.79rem;color:#547188;display:block;margin-top:3px;font-weight:500}
#isrd .isrd-use{padding-left:19px;margin:0}
#isrd .isrd-use li{margin:7px 0}
#isrd .isrd-visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
#isrd [hidden]{display:none!important}
@media(max-width:750px){#isrd .isrd-grid{grid-template-columns:1fr}#isrd .isrd-side{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}#isrd .isrd-side>*+*{margin:0}#isrd .isrd-panel{margin-top:15px}}
@media(max-width:520px){#isrd{padding:0 10px;margin:14px auto 22px;font-size:15px}#isrd .isrd-card{border-radius:15px;padding:18px}#isrd .isrd-side{grid-template-columns:1fr}#isrd .isrd-more{grid-template-columns:1fr}#isrd .isrd-actions{gap:8px}#isrd .isrd-actions .isrd-btn{flex:1 1 calc(50% - 8px)}#isrd .isrd-practice-controls{grid-template-columns:1fr}#isrd .isrd-panel{padding:17px}}

#isrd .isrd-example-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
#isrd .isrd-example{min-width:0;border:1px solid var(--line);border-radius:12px;background:#f8fbff;padding:15px}
#isrd .isrd-example h3{font-size:1rem;line-height:1.5;margin:0 0 12px}
#isrd .isrd-example details{border-top:1px solid var(--line);padding-top:10px}
#isrd .isrd-example summary{cursor:pointer;font-weight:750;color:var(--blue);font-size:.92rem}
#isrd .isrd-example details[open] summary{margin-bottom:9px}
#isrd .isrd-example p{font-size:.92rem;line-height:1.55;margin:0}
#isrd .isrd-example p+p{margin-top:7px}
#isrd .isrd-note{border-left:3px solid #81aacb;padding-left:12px;color:var(--muted);font-size:.86rem;margin-top:12px}
@media(max-width:760px){#isrd .isrd-example-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){#isrd .isrd-btn{transition:none}}