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

body {
font-family: Arial, Helvetica, sans-serif;
background: #f5f7fb;
color: #111827;
min-height: 100vh;
}

.container {
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
padding: 24px;
}

.card {
width: 100%;
max-width: 440px;
background: #fff;
border-radius: 18px;
padding: 34px 28px;
box-shadow: 0 12px 40px rgba(0,0,0,.08);
}

.logo {
font-size: 18px;
font-weight: 700;
margin-bottom: 32px;
}

h1 {
font-size: 28px;
margin-bottom: 10px;
}

.subtitle {
color: #6b7280;
font-size: 15px;
line-height: 1.5;
margin-bottom: 28px;
}

label {
display: block;
font-size: 14px;
font-weight: 600;
margin: 16px 0 8px;
}

input {
width: 100%;
padding: 14px;
border: 1px solid #d1d5db;
border-radius: 10px;
font-size: 15px;
outline: none;
}

input:focus {
border-color: #111827;
}

.button {
width: 100%;
border: 0;
border-radius: 10px;
background: #111827;
color: #fff;
padding: 15px;
margin-top: 22px;
font-size: 16px;
font-weight: 600;
cursor: pointer;
}

.error {
color: #dc2626;
font-size: 13px;
margin-top: 12px;
}

.invoice-box {
background: #f8fafc;
border-radius: 12px;
padding: 18px;
margin-top: 24px;
}

.invoice-row {
display: flex;
justify-content: space-between;
gap: 20px;
padding: 14px 0;
border-bottom: 1px solid #e5e7eb;
font-size: 14px;
}

.invoice-row:last-child {
border-bottom: 0;
}

.invoice-row span {
color: #6b7280;
}

.back {
display: block;
text-align: center;
margin-top: 20px;
color: #6b7280;
text-decoration: none;
font-size: 14px;
}