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

body {
    background: #0f172a;
    color: white;
    font-family: Arial;
}

header {
    padding: 20px;
    background: #111827;
    border-bottom: 1px solid #1f2937;
}

h1 {
    margin-bottom: 15px;
}

.stats {
    display: flex;
    gap: 15px;
}

.card {
    background: #1e293b;
    padding: 15px;
    border-radius: 10px;
    min-width: 120px;
}

.card span {
    display: block;
    font-size: 24px;
    font-weight: bold;
}

main {
    padding: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #111827;
}

thead {
    background: #1f2937;
}

th, td {
    padding: 12px;
    border-bottom: 1px solid #1e293b;
    text-align: left;
    font-size: 14px;
}

tr:hover {
    background: #1e293b;
}

.error {
    color: #ff6b6b;
}