:root{--ink:#101828;--muted:#667085;--line:#e4e7ec;--blue:#2458ff;--orange:#f97316;--red:#c7352b;--green:#16875a;--yellow:#f5c518;--bg:#f6f8fc}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif}
.pr-main{width:min(1160px,94%);margin:28px auto 90px}
.pr-hero{background:linear-gradient(135deg,#111827,#1f2937 65%,#312e81);border-radius:24px;padding:30px;color:#fff;box-shadow:0 18px 46px rgba(17,24,39,.16)}
.pr-tag{display:inline-flex;padding:6px 10px;border-radius:999px;background:#263244;color:var(--yellow);font-size:10px;font-weight:950;letter-spacing:.7px}
.pr-hero h1{font-size:40px;line-height:1.05;margin:12px 0 9px}.pr-hero p{max-width:900px;margin:0;color:#d0d5dd;line-height:1.65}
.pr-rules{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:18px 0}
.pr-rule{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}
.pr-rule span{font-size:25px}.pr-rule strong{display:block;margin:8px 0 5px}.pr-rule p{margin:0;color:var(--muted);font-size:11px;line-height:1.55}
.pr-section{margin-top:24px}.pr-head{display:flex;justify-content:space-between;gap:18px;align-items:end;margin-bottom:12px}.pr-head h2{margin:0;font-size:25px}.pr-head p{margin:5px 0 0;color:var(--muted);font-size:12px;line-height:1.5;max-width:800px}
.pr-count{padding:7px 10px;border-radius:999px;background:#eef3ff;color:var(--blue);font-size:10px;font-weight:950;white-space:nowrap}
.pr-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.pr-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:19px;min-height:190px;position:relative;overflow:hidden;box-shadow:0 8px 24px rgba(17,24,39,.045)}
.pr-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--blue)}
.pr-card.real:before{background:var(--red)}.pr-card.level:before{background:var(--orange)}.pr-card.exam:before{background:var(--green)}
.pr-card .type{display:inline-flex;padding:5px 8px;border-radius:999px;background:#f2f4f7;color:#475467;font-size:9px;font-weight:950;letter-spacing:.45px}
.pr-card h3{font-size:17px;margin:11px 0 6px}.pr-card p{font-size:11px;color:var(--muted);line-height:1.55;margin:0}
.pr-card .empty{margin-top:14px;padding:10px 11px;border-radius:11px;background:#f8fafc;color:#667085;font-size:10px;font-weight:800}
.pr-note{margin-top:22px;background:#fffbea;border:1px solid #f0df8a;border-radius:16px;padding:17px 19px;color:#5c5100}
.pr-note strong{display:block;margin-bottom:4px}.pr-note p{margin:0;font-size:12px;line-height:1.55}
.pr-bank{margin-top:24px;background:#fff;border:1px solid var(--line);border-radius:19px;padding:20px}
.pr-bank h2{margin:0 0 6px}.pr-bank p{margin:0;color:var(--muted);font-size:12px;line-height:1.6}
.pr-bank-list{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:14px}
.pr-bank-list div{border:1px dashed #cfd6df;background:#fafbfc;border-radius:13px;padding:14px;text-align:center}
.pr-bank-list strong{display:block;font-size:14px}.pr-bank-list span{display:block;margin-top:4px;color:var(--muted);font-size:10px}
@media(max-width:900px){.pr-rules,.pr-grid{grid-template-columns:1fr 1fr}.pr-bank-list{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.pr-main{width:calc(100% - 20px)}.pr-hero{padding:22px}.pr-hero h1{font-size:31px}.pr-rules,.pr-grid,.pr-bank-list{grid-template-columns:1fr}.pr-head{align-items:flex-start;flex-direction:column}}

.real-quiz{margin-top:26px}
.real-tools{display:flex;gap:9px;align-items:center;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:16px;padding:13px;margin-bottom:12px}
.real-tools select,.real-tools button{height:39px;border:1px solid #d0d5dd;background:#fff;border-radius:10px;padding:0 12px;font-weight:850;color:#344054}
.real-tools button{cursor:pointer}.real-tools .real-score{margin-left:auto;font-size:11px;color:#667085}
.real-question{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 10px 28px rgba(17,24,39,.05)}
.real-meta{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px;color:#667085;font-size:10px;font-weight:850}
.real-badge{display:inline-flex;padding:6px 9px;border-radius:999px;background:#fff0ef;color:#b42318;font-weight:950;letter-spacing:.6px}
.real-question h3{font-size:18px;line-height:1.5;margin:0 0 15px}
.real-options{display:grid;gap:9px}.real-option{width:100%;text-align:left;border:1px solid #dfe4ea;background:#fff;border-radius:12px;padding:13px 14px;cursor:pointer;font-size:13px;line-height:1.45;color:#344054}
.real-option:hover{border-color:#9bb0ff;background:#f8faff}.real-option.selected{border-color:var(--blue);box-shadow:0 0 0 2px rgba(36,88,255,.08)}
.real-option.correct{border-color:#8fd3b3;background:#effbf5;color:#0d6241}.real-option.wrong{border-color:#efa49e;background:#fff3f2;color:#9f2d25}
.real-actions{display:flex;justify-content:space-between;gap:9px;margin-top:15px}.real-actions button{height:40px;border:1px solid #d0d5dd;background:#fff;border-radius:10px;padding:0 13px;font-weight:900;cursor:pointer}.real-actions .primary{background:var(--blue);border-color:var(--blue);color:#fff}
.real-feedback{display:none;border-top:1px solid #eef0f3;margin-top:17px;padding-top:17px}.real-feedback.show{display:block}.real-feedback h4{margin:0 0 13px;font-size:15px}.real-feedback h4.ok{color:var(--green)}.real-feedback h4.bad{color:var(--red)}
.real-explain,.real-theory{padding:13px 14px;border-radius:12px;margin-bottom:11px}.real-explain{background:#f8fafc;border:1px solid #eef0f3}.real-theory{background:#f4f7ff;border:1px solid #dbe5ff}
.real-explain strong,.real-theory strong{font-size:11px}.real-explain p,.real-theory p{margin:5px 0 0;font-size:12px;line-height:1.6;color:#475467}
.real-rationales{display:grid;gap:7px;margin-top:8px}.real-rat{background:#f8fafc;border:1px solid #eef0f3;border-radius:10px;padding:10px 11px;font-size:11.5px;line-height:1.5;color:#475467}.real-rat strong{color:#101828}
.real-fija{margin-top:12px;padding:12px 13px;border-radius:11px;background:#fffbea;border:1px solid #f0df8a;color:#5c5100;font-size:12px;line-height:1.55}.real-fija strong{display:block;margin-bottom:3px}
.real-source-note{margin-top:10px;font-size:10.5px;color:#667085;line-height:1.5}
@media(max-width:620px){.real-tools>*{width:100%}.real-tools .real-score{margin-left:0}.real-actions{flex-wrap:wrap}.real-actions button{flex:1}.real-question{padding:17px}}

.prob-quiz{margin-top:28px}
.prob-badge{display:inline-flex;padding:6px 9px;border-radius:999px;background:#fff4e8;color:#b54708;font-weight:950;letter-spacing:.55px;font-size:9px}

.pr-bank-list a{border:1px dashed #cfd6df;background:#fafbfc;border-radius:13px;padding:14px;text-align:center;text-decoration:none;color:#101828;transition:.18s ease}
.pr-bank-list a:hover{border-color:#9bb0ff;background:#f7f9ff;transform:translateY(-1px)}
.pr-bank-list a strong{display:block;font-size:14px}.pr-bank-list a span{display:block;margin-top:4px;color:var(--muted);font-size:10px;line-height:1.4}.pr-bank-list a em{display:inline-block;margin-top:9px;color:var(--blue);font-size:10px;font-style:normal;font-weight:950}