* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background: #0f172a;
    color: #fff;
}

/* Center Layout */
#app {
    max-width: 420px;
    margin: auto;
    padding: 20px;
}

/* Title */
h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #38bdf8;
}

/* Card */
.card {
    background: #1e293b;
    padding: 15px;
    border-radius: 15px;
    box-shadow: 0px 10px 25px rgba(0,0,0,0.5);
}

/* Inputs */
input, select {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border-radius: 10px;
    border: none;
    outline: none;
    background: #334155;
    color: white;
}

/* Button */
button {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background: linear-gradient(45deg, #22c55e, #4ade80);
    border: none;
    border-radius: 10px;
    color: black;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

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

/* Total Box */
h2 {
    text-align: center;
    margin-top: 20px;
    background: #1e293b;
    padding: 12px;
    border-radius: 10px;
}

/* Expense List */
ul {
    margin-top: 15px;
}

li {
    list-style: none;
    background: #1e293b;
    margin: 10px 0;
    padding: 12px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: 0.3s;
}

li:hover {
    background: #334155;
}

/* Delete Button */
li button {
    background: #ef4444;
    color: white;
    padding: 5px 10px;
    border-radius: 6px;
}

/* Charts */
canvas {
    margin-top: 20px;
    background: white;
    border-radius: 12px;
    padding: 10px;
}

/* Login */
#loginPage input {
    width: 80%;
    padding: 10px;
    margin: 10px;
}

#loginPage button {
    width: 50%;
}