body {
    margin: 0;
    background: #f7f7f7;
    font-family: -apple-system, sans-serif;
}

/* Top Section */
.app {
    text-align: center;
    padding-top: 40px;
}

.title {
    font-size: 26px;
    color: #6a00ff;
}

/* Circle */
.circle-wrap {
    margin-top: 30px;
}

.circle {
    width: 220px;
    height: 220px;
    margin: auto;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.5s ease;
}

.inner {
    width: 160px;
    height: 160px;
    background: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    font-weight: bold;
}

/* iPhone Style Navbar */
.nav {
    position: fixed;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* Items */
.nav-item {
    text-decoration: none;
    color: #777;
    font-size: 12px;
    text-align: center;
    position: relative;
    transition: 0.3s;
}

.nav-item i {
    font-size: 20px;
    display: block;
    margin-bottom: 3px;
    transition: 0.3s;
}

/* Active */
.nav-item.active {
    color: #6a00ff;
    text-shadow: 0 0 10px #6a00ff;
}

.nav-item.active i {
    transform: translateY(-5px) scale(1.2);
}

/* Indicator Bubble */
.indicator {
    position: absolute;
    bottom: 8px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg,#6a00ff,#a020f0);
    border-radius: 50%;
    z-index: -1;
    transition: 0.4s;
}