:root{--bg:#f6f7f2;--text:#112012;--brand:#0d6b3f;--card:#ffffff;--line:#d7dfd4}*{box-sizing:border-box}body{margin:0;font-family:ibm plex sans,segoe ui,sans-serif;background:radial-gradient(circle at 20% -10%,#d8f5dd,var(--bg) 45%);color:var(--text);line-height:1.6}.wrap{width:min(960px,92vw);margin:0 auto}.site-header{border-bottom:1px solid var(--line);background:rgba(255,255,255,.8);backdrop-filter:blur(6px)}.site-header .wrap{display:flex;align-items:center;justify-content:space-between;padding:.9rem 0}.brand{font-weight:700;color:var(--brand);text-decoration:none}nav a{margin-left:1rem;color:var(--text);text-decoration:none}main{padding:2rem 0 3rem}.hero h1{margin:0;font-size:clamp(1.8rem,3vw,2.6rem)}.button{display:inline-block;padding:.55rem .95rem;border:1px solid var(--brand);border-radius:8px;color:var(--brand);text-decoration:none;font-weight:600}.doc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1.2rem 1.1rem}.content pre{overflow-x:auto;border:1px solid var(--line);border-radius:8px;padding:.7rem}.cards{margin-top:1rem;display:grid;gap:.8rem}.card{display:block;text-decoration:none;color:inherit;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:.9rem}.card h2{margin:0 0 .35rem;font-size:1.1rem}.related{margin-top:1rem;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1rem}.quiz-tool{margin:1rem 0 1.2rem;background:#f7fbf7;border:1px solid #cde1cf;border-radius:12px;padding:1rem}.quiz-tool h2{margin:0 0 .5rem}.quiz-summary{margin:0 0 .8rem;color:#2a3a2a}.quiz-fields{display:grid;gap:.8rem}.quiz-question{background:#fff;border:1px solid var(--line);border-radius:10px;padding:.85rem}.quiz-question h3{margin:0 0 .5rem;font-size:1rem}.quiz-question.is-correct{border-color:#27965f;background:#f0fcf4}.quiz-question.is-incorrect{border-color:#cc4d4d;background:#fff3f3}.quiz-answer textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:.55rem;font-family:inherit;font-size:.95rem}.quiz-option{display:flex;align-items:flex-start;gap:.45rem;margin-bottom:.4rem}.quiz-hint{margin:.45rem 0 0;color:#536553;font-size:.88rem}.quiz-actions{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.85rem}.quiz-button{cursor:pointer;background:#fff}.quiz-button.primary{color:#fff;border-color:var(--brand);background:var(--brand)}.quiz-button.danger{color:#8a1e1e;border-color:#cc4d4d}.quiz-status{margin:.8rem 0 0;font-weight:600}.quiz-answer-key{margin-top:.7rem}.quiz-answer-key summary{cursor:pointer;color:#1e4327;font-weight:600}