body {
    margin: 0;
    font-family: 'Segoe UI';
    background: radial-gradient(circle at top, #0f2027, #203a43, #2c5364);
    color: white;
}

/* CONTAINER */
.app {
    max-width: 420px;
    margin: auto;
    padding: 20px;
    text-align: center;
}

/* TITLE */
h1 {
    font-size: 30px;
    margin-bottom: 5px;
}

.subtitle {
    opacity: 0.8;
    margin-bottom: 20px;
}

/* GLASS CARD */
.glass {
    background: rgba(255,255,255,0.08);
    border-radius: 20px;
    padding: 20px;
    margin: 15px 0;
    backdrop-filter: blur(15px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    transition: 0.3s;
}

.glass:hover {
    transform: translateY(-5px);
}

/* INPUT */
input {
    width: 90%;
    padding: 12px;
    margin: 8px;
    border-radius: 12px;
    border: none;
    outline: none;
}

/* BUTTON */
button {
    width: 95%;
    padding: 12px;
    margin-top: 10px;
    border-radius: 12px;
    border: none;
    background: linear-gradient(45deg, #00c6ff, #0072ff);
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    transform: scale(1.05);
}

/* HASIL */
.hasil {
    font-size: 16px;
    line-height: 1.6;
}

/* FOOTER */
.footer {
    margin-top: 20px;
    opacity: 0.7;
    font-size: 13px;
}