.psc-paper{margin:2rem 0;counter-reset:q}
.psc-toolbar{display:flex;justify-content:space-between;align-items:center;gap:1rem;position:sticky;top:0;z-index:5;background:var(--bg,#fff);padding:.75rem 0;border-bottom:1px solid #e3e8e5}
.psc-count{font-weight:700;color:#0a7a4b}
.psc-all{background:#fff;border:2px solid #0a7a4b;color:#0a7a4b;border-radius:999px;padding:.45rem 1rem;font-weight:700;cursor:pointer}
.psc-all:hover{background:#0a7a4b;color:#fff}
.psc-q{background:#fff;border:1px solid #e3e8e5;border-radius:14px;padding:1.1rem 1.2rem;margin:1rem 0;box-shadow:0 1px 2px rgba(0,0,0,.04);scroll-margin-top:70px}
.psc-q header{display:flex;gap:.8rem;align-items:flex-start}
.psc-num{flex:none;background:#0a7a4b;color:#fff;font-weight:700;min-width:2rem;height:2rem;border-radius:8px;display:grid;place-items:center;font-size:.9rem}
.psc-text{margin:.2rem 0 0;font-weight:600;font-size:1.05rem;line-height:1.6}
.psc-opts{list-style:none;margin:.9rem 0 .6rem;padding:0;display:grid;gap:.5rem}
.psc-opt{width:100%;display:flex;gap:.7rem;text-align:left;align-items:flex-start;background:#f7faf8;border:1.5px solid #dbe5df;border-radius:10px;padding:.65rem .8rem;font:inherit;cursor:pointer;transition:.15s}
.psc-opt:hover{border-color:#0a7a4b;background:#eef8f2}
.psc-opt b{flex:none;width:1.7rem;height:1.7rem;border-radius:50%;background:#fff;border:1.5px solid #b9cbc1;display:grid;place-items:center;font-size:.8rem}
.psc-opt.is-correct{background:#e3f6ea;border-color:#16a05a}
.psc-opt.is-correct b{background:#16a05a;border-color:#16a05a;color:#fff}
.psc-opt.is-wrong{background:#fdecec;border-color:#d64545}
.psc-opt.is-wrong b{background:#d64545;border-color:#d64545;color:#fff}
.psc-show{background:#f5a623;color:#2b1d00;border:0;border-radius:10px;padding:.6rem 1.1rem;font-weight:700;font-size:.95rem;cursor:pointer;margin-top:.3rem}
.psc-show:hover{background:#e29210}
.psc-ans{margin-top:.8rem;padding:.8rem 1rem;background:#effaf3;border-left:4px solid #16a05a;border-radius:8px}
.psc-ans[hidden]{display:none}
.psc-correct{margin:0;color:#0b5c39}
.psc-exp{margin:.5rem 0 0;color:#333;font-size:.95rem}
@media print{.psc-toolbar,.psc-show{display:none}.psc-ans[hidden]{display:block}}