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

body {
    height: 100vh;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Glass Card */
.container {
    width: 420px;
    backdrop-filter: blur(15px);
    background: rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    padding: 25px;
    color: #fff;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

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

/* Inputs */
input {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border-radius: 10px;
    border: none;
    outline: none;
    font-size: 14px;
}

/* Section title */
h3 {
    margin-top: 10px;
}

/* Buttons */
button {
    width: 100%;
    padding: 12px;
    border-radius: 12px;
    border: none;
    margin-top: 10px;
    font-size: 15px;
    cursor: pointer;
    transition: 0.3s;
}

/* Generate button */
button:first-of-type {
    background: #00c853;
    color: white;
}

button:first-of-type:hover {
    background: #00b34a;
}

/* Other buttons */
button:nth-of-type(2),
button:nth-of-type(3) {
    background: rgba(255,255,255,0.2);
    color: white;
}

button:nth-of-type(2):hover,
button:nth-of-type(3):hover {
    background: rgba(255,255,255,0.35);
}

/* Bill Card */
.bill {
    margin-top: 20px;
    padding: 15px;
    border-radius: 15px;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
}

/* Bill heading */
.bill h2 {
    text-align: center;
    margin-bottom: 10px;
}

/* Rows */
.row {
    display: flex;
    justify-content: space-between;
    margin: 6px 0;
}

/* Divider */
hr {
    border: none;
    height: 1px;
    background: rgba(255,255,255,0.4);
    margin: 10px 0;
}

/* Total highlight */
.total {
    font-size: 18px;
    font-weight: bold;
}

/* Invoice Style */
.invoice {
    background: white;
    color: black;
    padding: 20px;
    border-radius: 10px;
}

/* Header */
.header {
    text-align: center;
    border-bottom: 2px solid black;
    margin-bottom: 10px;
}

/* Info section */
.info {
    margin: 10px 0;
}

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

table th, table td {
    border: 1px solid black;
    padding: 8px;
    text-align: left;
}

table th {
    background: #f2f2f2;
}

/* Total row */
.total-row {
    font-weight: bold;
    background: #e6ffe6;
}

/* Footer */
.footer {
    margin-top: 10px;
    text-align: center;
    font-size: 12px;
}