* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    background: #0a0a0a;
    color: #ccc;
    font-family: 'Segoe UI', monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
#login-screen, #main-screen {
    width: 100%;
    max-width: 1200px;
    padding: 2rem;
}
.card {
    background: #111;
    border: 1px solid #333;
    padding: 2rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}
input, button {
    background: #1a1a1a;
    border: 1px solid #444;
    color: #ddd;
    padding: 0.5rem;
    margin: 0.5rem 0;
    width: 100%;
    border-radius: 4px;
    outline: none;
}
button {
    background: #b30000;
    font-weight: bold;
    cursor: pointer;
    width: auto;
    padding: 0.5rem 1rem;
}
button:hover {
    background: #e60000;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}
th, td {
    padding: 0.5rem;
    border-bottom: 1px solid #222;
    text-align: center;
    vertical-align: middle;
}
th {
    color: #b30000;
}
.hidden {
    display: none;
}
nav {
    margin-bottom: 1rem;
    display: flex;
    gap: 1rem;
}
nav a {
    color: #b30000;
    text-decoration: none;
    font-weight: bold;
}
#logout-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: 1px solid #555;
    width: auto;
    padding: 0.3rem 0.8rem;
}
.tabs {
    margin: 1rem 0;
}
.tab {
    padding: 0.4rem 1rem;
    margin-right: 0.3rem;
    background: #1a1a1a;
    border: 1px solid #444;
    color: #ccc;
    cursor: pointer;
    border-radius: 4px;
}
.tab.active {
    background: #b30000;
    border-color: #b30000;
}
.tab-content {
    margin-top: 1rem;
}
.detail-card {
    background: #111;
    border: 1px solid #333;
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 1rem;
}
.info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.3rem 0;
    border-bottom: 1px solid #222;
}
.info-row span:first-child {
    color: #888;
}
.info-row span:last-child {
    font-weight: bold;
}
.actions button {
    margin: 2px;
}