/* Enhanced dark theme with refined button and spinner */
body {
    background-color: #121212;
    color: #eee;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 600px;
    margin: 60px auto;
    padding: 30px;
    background: #1e1e1e;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}
h1 {
    color: #e53935;
    text-align: center;
    margin-bottom: 20px;
}
input, button {
    width: 100%;
    padding: 14px;
    margin: 12px 0;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    box-sizing: border-box;
}
input {
    background: #2a2a2a;
    color: #eee;
}
button {
    position: relative;
    background: #e53935;
    color: #fff;
    cursor: pointer;
    overflow: hidden;
    transition: background 0.2s ease, transform 0.1s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}
button:hover {
    background: #d32f2f;
}
button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(229,57,53,0.5);
}
button:active {
    transform: scale(0.98);
    box-shadow: inset 0 3px 5px rgba(0,0,0,0.3);
}
/* Spinner */
.spinner {
    border: 3px solid rgba(255,255,255,0.3);
    border-top: 3px solid #fff;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

.table {
    width: 100%;
    margin-top: 25px;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid #444;
    border-radius: 4px;
    overflow: hidden;
}
.table th {
    background: #2a2a2a;
    color: #e0e0e0;
    padding: 12px;
    text-align: left;
    width: 30%;
}
.table td {
    background: #1e1e1e;
    color: #ccc;
    padding: 12px;
}
.table tr:nth-child(even) td {
    background: #242424;
}