* { margin:0; padding:0; box-sizing:border-box; }

body {
    font-family: 'Roboto', sans-serif;
    color: #fff;
    line-height: 1.6;
    transition: background 1.2s ease; /* transisi smooth saat ganti background */
}

.container {
    max-width: 900px;
    margin: auto;
    padding: 40px 20px;
    text-align: center;
}

h1 { font-size: 2.5rem; margin-bottom: 30px; }
h2 { font-size: 1.8rem; margin: 20px 0 10px 0; }
p { font-size: 1.1rem; margin-bottom: 20px; }

.profile-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #fff;
    margin: 0 auto 30px auto;
    transition: transform 0.3s ease;
}
.profile-img:hover { transform: scale(1.1); }

.controls {
    margin-top: 20px;
}
.controls button {
    padding: 10px 20px;
    margin: 5px;
    border: none;
    border-radius: 8px;
    background: #ffd700;
    color: #000;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.3s ease;
}
.controls button:hover { transform: scale(1.05); }

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255,255,255,0.2);
    border-radius: 8px;
    margin-top: 20px;
}
.progress-bar #progress {
    width: 0%;
    height: 100%;
    background: #ffd700;
    border-radius: 8px;
    transition: width 0.4s ease;
}

@media(max-width:600px){
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    .profile-img { width: 120px; height: 120px; }
}