body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(180deg, #3a1c71, #d76d77, #ffaf7b);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
}

.app {
    max-width: 480px;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    display: flex;
    justify-content: space-between;
    padding: 15px;
    font-size: 1.2rem;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.coin-container {
    width: 220px;
    height: 220px;
    margin-bottom: 20px;
}

.coin-container img {
    width: 100%;
    transition: transform 0.15s ease;
    cursor: pointer;
}

.coin-container img.bounce {
    transform: scale(1.1);
}

.energy-bar {
    width: 80%;
    height: 10px;
    background: rgba(255,255,255,0.2);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 15px;
}

#energy-progress {
    height: 100%;
    width: 0%;
    background: gold;
    transition: width 0.3s ease;
}

.boost-btn, .claim-btn {
    padding: 10px 20px;
    font-size: 1.1rem;
    border: none;
    border-radius: 8px;
    margin: 5px 0;
    cursor: pointer;
    background: gold;
    color: black;
    font-weight: bold;
}

.footer {
    display: flex;
    justify-content: space-around;
    background: rgba(0,0,0,0.3);
    padding: 10px 0;
}

.nav-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
}