body{margin:0;font-family:Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text);transition:background .3s,color .3s}:root{--bg: #f6f6f6;--text: #222;--primary: #4e6e58;--secondary: #e0e0e0;--accent: #f9b233;--border: #ccc}[data-theme=dark]{--bg: #23272f;--text: #f6f6f6;--primary: #7bb274;--secondary: #2d333b;--accent: #f9b233;--border: #444}.app-header{background:var(--primary);color:#fff;padding:1rem 2rem;display:flex;align-items:center;justify-content:space-between}.app-footer{padding:2rem;background:var(--secondary);margin-top:2rem}.intro-section{text-align:center;max-width:800px;margin:0 auto 2rem}.intro-section h2{color:var(--primary);margin-bottom:1rem}.intro-section p{font-size:1.1rem;line-height:1.6}.sections-summary{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;max-width:1200px;margin:0 auto}.section-card{background:var(--secondary);border-radius:8px;padding:1.25rem;margin:.75rem;width:250px;box-shadow:0 2px 8px #00000014;transition:transform .2s,box-shadow .2s;cursor:pointer}.section-card:hover,.section-card:focus{transform:translateY(-5px);box-shadow:0 5px 15px #0000001a}.section-card:active{transform:translateY(-2px)}.section-icon{font-size:2rem;display:block;margin-bottom:.75rem}.section-card h3{color:var(--primary);margin:.5rem 0}.section-card p{margin:0;font-size:.95rem;line-height:1.5}.navbar{display:flex;gap:1.5rem}.nav-icon{cursor:pointer;font-size:1.5rem;color:var(--accent);background:none;border:none;transition:color .2s}.nav-icon:hover{color:#fff}.section-modal{position:fixed;top:0;left:0;width:100vw;height:100vh;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;z-index:1000}.section-content{background:var(--secondary);color:var(--text);border-radius:12px;padding:2rem;min-width:320px;max-width:90vw;max-height:80vh;overflow-y:auto;box-shadow:0 8px 32px #0000002e;position:relative}.close-btn{position:absolute;top:1rem;right:1rem;background:none;border:none;font-size:1.5rem;color:var(--primary);cursor:pointer}.theme-toggle{background:none;border:none;color:var(--accent);font-size:1.5rem;cursor:pointer;margin-left:1rem}img.gallery-img{max-width:180px;max-height:140px;border-radius:8px;margin:.5rem;box-shadow:0 2px 8px #00000014}.container-info{position:relative;text-align:center;margin-top:2rem;padding-bottom:1rem}.info-button{background:none;border:none;font-size:1.5rem;cursor:pointer;opacity:.7;transition:opacity .2s}.info-button:hover{opacity:1}.info-popup{position:absolute;bottom:100%;left:50%;transform:translate(-50%);background:var(--bg);border:1px solid var(--border);padding:1rem;border-radius:8px;box-shadow:0 4px 12px #00000026;min-width:250px;z-index:100}.info-popup button{background:var(--primary);color:var(--text);border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer;margin-top:.5rem}.quiz-container{margin-top:2rem}.quiz-question{background:var(--secondary);border-radius:8px;padding:1.5rem;margin-bottom:1.5rem;box-shadow:0 2px 8px #00000014}.quiz-options{margin:1rem 0}.quiz-option{margin:.5rem 0}.quiz-option label{display:flex;align-items:center;cursor:pointer}.quiz-option input{margin-right:.75rem}.quiz-option input:disabled+span{opacity:.7}.quiz-actions{display:flex;gap:.75rem;margin-top:1rem}.check-answer-btn,.show-answer-btn{background:var(--primary);color:#fff;border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer;font-weight:500;transition:background-color .2s}.check-answer-btn:hover,.show-answer-btn:hover{background-color:var(--accent)}.check-answer-btn:disabled{background-color:#ccc;cursor:not-allowed}.answer-status{margin-top:1rem;padding:.75rem;border-radius:4px;text-align:center;font-weight:700}.answer-status.correct{background-color:#4caf5033;color:#2e7d32;border:1px solid #2e7d32}.answer-status.incorrect{background-color:#f4433633;color:#c62828;border:1px solid #c62828}.answer-reveal{margin-top:1rem;padding:1rem;background:rgba(255,255,255,.3);border-left:3px solid var(--accent);border-radius:0 4px 4px 0}.answer-reveal p{margin:.5rem 0}.app-title{display:flex;align-items:center;gap:12px}.title-icon{font-size:2.2rem;animation:gentle-sway 3s ease-in-out infinite}.modern-title{font-family:Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;font-weight:700;font-size:2.2rem;letter-spacing:-.5px;margin:0;padding:0;background:linear-gradient(90deg,#3a7bd5,#00d2ff);background-clip:text;-webkit-background-clip:text;color:transparent;position:relative;display:flex;gap:10px}.title-text{position:relative}.title-accent{position:relative;color:#444;font-weight:800}[data-theme=dark] .title-accent{color:#f0f0f0}@keyframes gentle-sway{0%,to{transform:rotate(-5deg)}50%{transform:rotate(5deg)}}@media (max-width: 600px){.section-content{padding:1rem;min-width:90vw}.app-header{flex-direction:column;gap:.5rem}.navbar{gap:.5rem}.app-title{gap:8px}.title-icon,.modern-title{font-size:1.8rem}}