:root{--color-bg:#f9fbfd;--color-card:#fff;--color-header:#182848;--color-primary:#20508d;--color-accent:#3ca1c3;--color-text:#18335a;--color-muted:#6b7991;--color-shadow:rgba(32,80,141,.04);--color-border:#dde6ed;--color-ok:#16a34a;--color-ok-bg:#ecfdf3;--color-ko:#ef4444;--color-ko-bg:#fef2f2}
html{box-sizing:border-box;font-size:16px}*,*::before,*::after{box-sizing:inherit}
body{margin:0;font-family:Montserrat,Arial,sans-serif;background:linear-gradient(160deg,#f9fbfd 0%,#e8f3ff 55%,#f4f8fc 100%);color:var(--color-text);min-height:100vh;display:flex;flex-direction:column;-webkit-font-smoothing:antialiased}
.site-header{width:100%;background:var(--color-header);box-shadow:0 2px 20px 0 var(--color-shadow);padding:1.1rem 0 .85rem;display:flex;flex-direction:column;align-items:center;position:sticky;top:0;z-index:24}
.logo{font-weight:900;font-size:1.65rem;letter-spacing:1.5px;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:.35rem;text-decoration:none;text-shadow:0 2.5px 18px var(--color-accent),0 1px 0 #122b46}
.logo .badge{background:var(--color-accent);color:#fff;font-size:.75rem;font-weight:800;padding:2px 10px;border-radius:8px;letter-spacing:1px;border:1px solid #fff3}
.header-nav{display:flex;gap:1.4rem;align-items:center;justify-content:center;flex-wrap:wrap}
.nav-link{color:#f1f6fc;text-decoration:none;padding:6px 18px;font-weight:600;border-radius:7px;font-size:1rem;transition:background .13s,color .14s}
.nav-link:hover,.nav-link:focus{color:var(--color-header);background:#fff}
.quiz-topbar{display:flex;align-items:center;gap:.85rem;max-width:720px;width:100%;margin:1.1rem auto 0;padding:0 1rem}
.quiz-topbar[hidden]{display:none}
.btn-exit{flex-shrink:0;width:2.2rem;height:2.2rem;border:1.5px solid var(--color-border);border-radius:8px;background:var(--color-card);color:var(--color-muted);font-size:1rem;font-weight:700;cursor:pointer;transition:color .12s,border-color .12s,background .12s}
.btn-exit:hover,.btn-exit:focus{color:var(--color-ko);border-color:#f5c2c2;background:var(--color-ko-bg)}
.progress-track{flex:1;height:12px;background:#d9e5f0;border-radius:999px;overflow:hidden;box-shadow:inset 0 1px 3px #20508d12}
.progress-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--color-primary),var(--color-accent));border-radius:inherit;transition:width .35s cubic-bezier(.4,0,.2,1)}
.lives{flex-shrink:0;display:flex;gap:2px;font-size:1.15rem;min-width:4.2rem;justify-content:flex-end;user-select:none}
.lives .heart-lost{opacity:.28;filter:grayscale(1)}
.quiz-app{flex:1;width:100%;max-width:720px;margin:0 auto;padding:1.25rem 1rem 2.5rem;display:flex;flex-direction:column}
.state-panel{background:var(--color-card);border:1.3px solid var(--color-border);border-radius:18px;box-shadow:0 2px 28px 0 #20508d08;padding:2.4rem 1.5rem;text-align:center;animation:fadeUp .4s cubic-bezier(.4,0,.2,1)}
.state-panel p{margin:.75rem 0 0;color:var(--color-muted);font-weight:500}
.state-error h2{margin:0 0 .5rem;color:var(--color-ko);font-size:1.25rem}
.spinner{width:36px;height:36px;margin:0 auto;border:3px solid #d0e0ef;border-top-color:var(--color-accent);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
@keyframes popIn{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}
.quiz-card{background:var(--color-card);border:1.3px solid var(--color-border);border-radius:18px;box-shadow:0 2px 28px 0 #20508d08;padding:1.55rem 1.35rem 1.35rem;display:flex;flex-direction:column;gap:1.25rem;animation:fadeUp .38s cubic-bezier(.4,0,.2,1);flex:1}
.quiz-meta{display:flex;flex-wrap:wrap;align-items:center;gap:.55rem}
.badge-cat{display:inline-block;background:#e8f3ff;color:var(--color-primary);font-size:.78rem;font-weight:700;letter-spacing:.4px;padding:.28rem .7rem;border-radius:6px;border:1px solid #cfe0f2}
.badge-variant{display:inline-block;color:var(--color-muted);font-size:.78rem;font-weight:600;padding:.28rem .55rem}
.question-counter{margin-left:auto;font-size:.82rem;font-weight:600;color:var(--color-muted)}
.question-text{margin:0;font-size:1.28rem;font-weight:700;color:var(--color-primary);line-height:1.35}
.options-grid{display:grid;grid-template-columns:1fr;gap:.7rem}
@media(min-width:560px){.options-grid{grid-template-columns:1fr 1fr}}
.option-btn{font-family:inherit;text-align:left;background:#f4f7fa;border:1.8px solid #d0ddea;border-radius:12px;padding:.95rem 1.05rem;font-size:1rem;font-weight:600;color:var(--color-text);cursor:pointer;transition:border-color .13s,box-shadow .13s,background .13s}
.option-btn:hover:not(:disabled),.option-btn:focus-visible:not(:disabled){border-color:var(--color-accent);box-shadow:0 2px 14px #3ca1c320;outline:none}
.option-btn.selected{border-color:var(--color-primary);background:#e8f3ff;box-shadow:0 0 0 2px #20508d22}
.option-btn.correct{border-color:var(--color-ok);background:var(--color-ok-bg);color:#166534}
.option-btn.wrong{border-color:var(--color-ko);background:var(--color-ko-bg);color:#991b1b}
.option-btn:disabled{cursor:default;opacity:.92}
.compose-area{display:flex;flex-direction:column;gap:1rem}
.sentence-slot{min-height:3.4rem;background:#f0f5fa;border:2px dashed #b8c9db;border-radius:12px;padding:.65rem .75rem;display:flex;flex-wrap:wrap;gap:.45rem;align-items:center}
.sentence-slot.has-words{border-style:solid;border-color:#c5d5e6;background:#f7fafc}
.sentence-slot.correct{border-color:var(--color-ok);background:var(--color-ok-bg)}
.sentence-slot.wrong{border-color:var(--color-ko);background:var(--color-ko-bg)}
.slot-placeholder{color:var(--color-muted);font-size:.92rem;font-weight:500;pointer-events:none}
.word-bank{display:flex;flex-wrap:wrap;gap:.5rem}
.word-chip{font-family:inherit;font-size:.98rem;font-weight:700;color:var(--color-primary);background:#fff;border:1.8px solid #c5d5e6;border-radius:10px;padding:.55rem .9rem;cursor:pointer;box-shadow:0 1px 6px #20508d0a;transition:transform .12s,border-color .12s,background .12s;animation:popIn .25s ease}
.word-chip:hover:not(:disabled),.word-chip:focus-visible:not(:disabled){border-color:var(--color-accent);transform:translateY(-1px);outline:none}
.word-chip.in-slot{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}
.word-chip.used{visibility:hidden;pointer-events:none}
.word-chip:disabled{cursor:default}
.feedback{border-radius:12px;padding:.9rem 1rem;animation:fadeUp .28s ease}
.feedback.ok{background:var(--color-ok-bg);border:1.5px solid #86efac;color:#166534}
.feedback.ko{background:var(--color-ko-bg);border:1.5px solid #fca5a5;color:#991b1b}
.feedback-title{margin:0 0 .3rem;font-size:1.02rem;font-weight:800}
.feedback-body{margin:0;font-size:.94rem;font-weight:500;line-height:1.5}
.quiz-actions{display:flex;justify-content:flex-end;gap:.65rem;margin-top:auto;padding-top:.35rem}
.btn{display:inline-block;font-family:inherit;font-weight:700;border:none;border-radius:6px;cursor:pointer;outline:none;letter-spacing:.4px;text-decoration:none;text-align:center;transition:background .15s,color .13s,opacity .12s}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-primary{background:var(--color-primary);color:#fff;padding:.85rem 1.8rem;font-size:1.02rem;border:2px solid #e7f4fa}
.btn-primary:hover:not(:disabled),.btn-primary:focus-visible:not(:disabled){background:var(--color-accent);color:var(--color-header);border-color:var(--color-primary)}
.btn-secondary{background:var(--color-accent);color:#fff;padding:.75rem 1.4rem;font-size:.98rem}
.btn-secondary:hover:not(:disabled){background:var(--color-primary)}
.btn-ghost{background:transparent;color:var(--color-muted);padding:.75rem 1.1rem;font-size:.95rem;border:1.5px solid var(--color-border)}
.btn-ghost:hover:not(:disabled){color:var(--color-primary);border-color:#b8c9db}
.results-panel{text-align:center;padding:2.2rem 1.4rem 1.8rem}
.results-emoji{font-size:2.6rem;line-height:1;margin-bottom:.6rem;animation:popIn .4s ease}
.results-panel h1{margin:0 0 .4rem;font-size:1.65rem;font-weight:800;color:var(--color-primary)}
.results-subtitle{margin:0 0 1.4rem;color:var(--color-muted);font-weight:500;font-size:1rem}
.results-score{display:flex;justify-content:center;gap:1.5rem;flex-wrap:wrap;margin-bottom:1.6rem}
.score-item{min-width:110px}
.score-item .value{display:block;font-size:1.85rem;font-weight:800;color:var(--color-accent);line-height:1.1}
.score-item .label{display:block;margin-top:.2rem;font-size:.82rem;font-weight:600;color:var(--color-muted);text-transform:uppercase;letter-spacing:.6px}
.results-actions{display:flex;flex-wrap:wrap;gap:.7rem;justify-content:center;align-items:center}
.results-wrap{display:flex;flex-direction:column;gap:.85rem;width:100%;animation:fadeUp .4s cubic-bezier(.4,0,.2,1)}
.help-panel{background:#f4f7fa;border:1px solid #e1e9f2;border-radius:12px;padding:1rem 1.1rem 1.05rem;text-align:center}
.help-text{margin:0 0 .7rem;color:var(--color-muted);font-size:.88rem;font-weight:500;line-height:1.45}
.help-socials{display:flex;justify-content:center;align-items:center;gap:.85rem}
.help-social-link{display:inline-flex;align-items:center;justify-content:center;width:2.35rem;height:2.35rem;border-radius:50%;background:#fff;border:1.4px solid #d0ddea;color:var(--color-primary);text-decoration:none;transition:border-color .12s,color .12s,background .12s,transform .12s}
.help-social-link:hover,.help-social-link:focus{border-color:var(--color-accent);color:var(--color-accent);transform:translateY(-1px);outline:none}
.social-icon{width:1.15rem;height:1.15rem;display:block}
.site-footer{background:var(--color-header);color:#eef0f6;text-align:center;padding:1rem .75rem;font-size:.95rem;font-weight:600}
.footer-heart{color:var(--color-accent)}
@media(max-width:570px){.logo{font-size:1.25rem}.quiz-card{padding:1.2rem 1rem 1.1rem;border-radius:14px}.question-text{font-size:1.12rem}.quiz-actions{flex-direction:column-reverse}.quiz-actions .btn{width:100%}.results-panel h1{font-size:1.35rem}.results-actions .btn{width:100%}}