:root{font-family:Palatino Linotype,Book Antiqua,Garamond,serif;line-height:1.6;font-weight:400;color:#182a25;background-color:#f3f0e8;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--ink: #182a25;--muted: #54635c;--accent: #2c7a63;--accent-dark: #1f5b49;--accent-soft: rgba(44, 122, 99, .14)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at top left,rgba(255,237,211,.8),transparent 55%),radial-gradient(circle at 80% 20%,rgba(173,216,200,.4),transparent 55%),linear-gradient(135deg,#f6f3ea,#e7efe9)}h1,h2{font-family:Trebuchet MS,Segoe UI,sans-serif;color:var(--ink);margin:0 0 .6rem;line-height:1.2}p{margin:0}#root{min-height:100vh}.app{display:flex;flex-direction:column;gap:2.5rem;max-width:980px;margin:0 auto;padding:3.5rem 1.5rem 4rem}.app__header{display:flex;flex-wrap:wrap;align-items:flex-end;gap:2rem;justify-content:space-between}.header-actions{display:flex;flex-direction:column;align-items:flex-end;gap:.9rem;flex:1 1 320px}.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:.75rem;color:var(--accent);margin-bottom:.6rem}.subhead{max-width:520px;color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(3,minmax(120px,1fr));gap:1rem;width:min(420px,100%)}.reset{border-radius:999px;border:1px solid rgba(44,122,99,.35);padding:.6rem 1.4rem;font-size:.95rem;background:#fff9;color:var(--accent-dark);font-weight:700;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}.reset:hover{transform:translateY(-1px);border-color:#2c7a63a6;box-shadow:0 10px 18px #182c241f}.reset:active{transform:translateY(0)}.stat{background:#ffffffb3;border-radius:18px;padding:.9rem 1rem;box-shadow:0 12px 30px #1e2f2c14}.stat__label{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}.stat__value{display:block;margin-top:.35rem;font-size:1.4rem;font-weight:700;color:var(--ink)}.card{background:#ffffffe6;border-radius:28px;padding:2.4rem 2.6rem 2.2rem;box-shadow:0 20px 60px #162e2624,0 2px 12px #162e2614;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:float-in .7s ease}.question-meta{display:flex;gap:.8rem;flex-wrap:wrap;margin-bottom:1.2rem}.question-utilities{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1rem}.mark-toggle{display:inline-flex;align-items:center;gap:.6rem;font-weight:600;color:var(--ink)}.mark-toggle input{width:18px;height:18px;accent-color:var(--accent)}.question-media{margin:1.2rem 0;border-radius:18px;overflow:hidden;background:#182a250f}.question-media img{display:block;width:100%;height:auto}.tag{border-radius:999px;padding:.3rem .9rem;background:var(--accent-soft);color:var(--accent-dark);font-size:.8rem;font-weight:600}.answers{display:grid;gap:1rem;margin-top:1.4rem}.answer{display:grid;grid-template-columns:auto 1fr;gap:1rem;text-align:left;border-radius:18px;border:1px solid transparent;padding:1rem 1.2rem;background:#f6f5f0;color:var(--ink);font-size:1rem;line-height:1.4;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;animation:rise-in .6s ease}.answer__index{font-weight:700;color:var(--accent-dark)}.answer:hover{transform:translateY(-2px);box-shadow:0 12px 28px #182c241f;border-color:#2a5f5133}.answer:disabled{cursor:default}.answer.is-correct{background:#e8f6ef;border-color:#3e9e77;box-shadow:0 12px 24px #3e9e772e}.answer.is-wrong{background:#fbeeee;border-color:#c65a5a}.answer.is-dim{opacity:.6}.feedback{margin-top:1.4rem;font-weight:600}.feedback .good{color:#297a59}.feedback .bad{color:#a64646}.feedback .hint{color:var(--muted)}.actions{margin-top:1.6rem;display:flex;justify-content:flex-end}.next{border:none;border-radius:999px;padding:.8rem 1.8rem;font-size:1rem;background:var(--accent);color:#fff;font-weight:700;letter-spacing:.02em;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,opacity .2s ease}.next:hover:enabled{transform:translateY(-2px);box-shadow:0 14px 30px #326a5640}.next:disabled{opacity:.6;cursor:not-allowed}.marked-controls{margin-top:1.8rem;display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;padding-top:1.2rem;border-top:1px solid rgba(40,74,64,.12)}.marked-actions{display:flex;flex-wrap:wrap;gap:.8rem}.ghost{border-radius:999px;border:1px solid rgba(44,122,99,.35);padding:.6rem 1.2rem;font-size:.95rem;background:#fff;color:var(--accent-dark);font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,opacity .2s ease}.ghost:hover:enabled{transform:translateY(-1px);border-color:#2c7a6399;box-shadow:0 10px 18px #182c241f}.ghost:disabled{opacity:.55;cursor:not-allowed}.marked-panel{margin-top:1rem;padding:1rem 1.2rem;border-radius:18px;background:#ffffffbf;border:1px solid rgba(40,74,64,.12)}.marked-title{font-weight:700;margin-bottom:.6rem;color:var(--ink)}.marked-empty{margin:0;color:var(--muted)}.marked-list{list-style:none;padding:0;margin:0;display:grid;gap:.75rem}.marked-item{display:grid;gap:.35rem}.marked-id{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.complete{text-align:left;display:grid;gap:1rem}@keyframes float-in{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes rise-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media(max-width:720px){.app{padding:2.5rem 1.1rem 3rem}.app__header{align-items:flex-start}.header-actions{align-items:stretch}.stats{grid-template-columns:repeat(auto-fit,minmax(120px,1fr))}.reset{width:100%}.card{padding:1.8rem 1.6rem}.question-meta{gap:.5rem}.question-utilities{flex-direction:column;align-items:flex-start}.answer{grid-template-columns:auto}.actions{justify-content:stretch}.next{width:100%}.marked-controls{align-items:stretch}.marked-actions,.ghost{width:100%}}@media(max-width:520px){.app{padding:2rem 1rem 2.5rem}.stat{padding:.75rem .9rem}.stat__value{font-size:1.2rem}.card{border-radius:22px;padding:1.4rem 1.2rem}.answer{padding:.9rem 1rem;font-size:.95rem}.eyebrow{letter-spacing:.12em}}