.continent-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;padding:20px}.continent-card{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px;border-radius:16px;background:#2a2a2a;color:#fff;text-align:center;cursor:pointer;transition:transform .2s ease}.continent-card img{width:120px;height:auto}.continent-card span{margin-top:10px;font-weight:700;color:#fff;text-shadow:none}.continent-card:hover{transform:scale(1.05)}.continent-card:active{transform:scale(.95)}.country-card{display:flex;align-items:center;gap:12px;padding:12px;border-bottom:1px solid #eee}.country-card:hover{background:#2a2a2a}.flag{width:50px;height:auto;border-radius:6px}.country-card .info{flex:1}.country-card .country{font-weight:700}.country-card .capital{font-size:.9rem;color:#666}.audio-btn{font-size:18px;cursor:pointer;background:none;border:none}.audio-btn:hover{transform:scale(1.2)}.action-container{display:flex;justify-content:center;gap:20px;margin-top:30px;width:100%;max-width:500px}.action-btn{font-size:20px;padding:20px 28px;border-radius:24px;border:none;cursor:pointer;font-weight:700;min-width:180px;display:flex;align-items:center;justify-content:center;gap:10px;transition:transform .15s ease,box-shadow .15s ease}.action-btn:active{transform:scale(.97)}.learn-btn{background:#00c850;color:#fff}.quiz-btn{background-color:red;color:#fff}.header-bar{position:relative;width:100%;max-width:500px;margin-top:10px;margin-bottom:10px;text-align:center}.header-bar h2{margin:0}.nav-btn{position:absolute;left:0;transform:none;top:7px;padding:8px 14px;border-radius:15px;background-color:#0ff;color:#fff;font-weight:700;font-size:14px;cursor:pointer;box-shadow:0 3px 8px #ff64644d;transition:all .15s ease}.nav-btn:hover{transform:translateY(-50%) translateY(-1px);box-shadow:0 5px 12px #ff646480}.nav-btn:active{transform:translateY(-50%) scale(.95)}#app{display:flex;flex-direction:column;align-items:center;width:100%}.audio-btn-large{font-size:20px;padding:8px 14px;border-radius:16px;display:flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(135deg,#4caf50,#66bb6a);color:#fff;font-weight:700;box-shadow:0 4px 10px #0003;cursor:pointer;border:none;transition:transform .15s ease;margin-top:25px}.audio-btn-large:hover{transform:scale(1.1)}.audio-btn-large:active{transform:scale(.95)}.option-btn{width:100%;max-width:500px;font-size:18px;padding:16px 20px;border-radius:16px;border:none;background:#2a2a2a;color:#fff;cursor:pointer;margin:10px 0;text-align:center;transition:transform .1s ease,background .1s ease}.option-btn:hover{background:#e0e0e0}.option-btn:active{transform:scale(.97)}.app-header{display:flex;flex-direction:row;align-items:center;justify-content:center;gap:10px;margin-top:20px;margin-bottom:10px}.app-logo{width:80px;height:auto;margin-bottom:8px}.app-header h1{font-size:24px;margin:0}.big-logo-container{display:flex;justify-content:center;align-items:center;width:100%;margin-top:40px}.big-logo{width:80%;max-width:320px;height:auto;opacity:.9;transition:transform .3s ease,opacity .3s ease}.big-logo:hover{transform:scale(1.05);opacity:1}.app-signature{position:fixed;bottom:10px;width:100%;text-align:center;font-size:12px;color:#1264e6e3;letter-spacing:1px;font-weight:500;pointer-events:none}.quiz-stats{display:flex;justify-content:space-between;width:100%;max-width:500px;margin:10px 0;font-weight:700}.progress-bar{width:100%;max-width:500px;height:10px;background:#eee;border-radius:10px;overflow:hidden;margin-bottom:15px}.progress-fill{height:100%;background-color:#00f;width:0%;transition:width .3s ease}.global-stats{margin-top:10px;font-size:16px;font-weight:700;text-align:center;line-height:1.6}body{background-color:#1e1e1e;color:#f1f1f1}