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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #0d0d0d;
    color: #ffffff;
}

.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    background: #1a1a1a;
    padding: 40px;
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
}

.login-container h1 {
    text-align: center;
    margin-bottom: 30px;
}

.login-container input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    background: #0d0d0d;
    border: 1px solid #333;
    border-radius: 6px;
    color: #fff;
    font-size: 16px;
}

.login-container button {
    width: 100%;
    padding: 12px;
    background: #FF4444;
    border: none;
    border-radius: 6px;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
}

.error {
    color: #FF4444;
    margin-top: 10px;
    text-align: center;
}

.dashboard-screen {
    display: flex;
}

.sidebar {
    width: 250px;
    background: #1a1a1a;
    min-height: 100vh;
    padding: 20px;
}

.sidebar h2 {
    margin-bottom: 30px;
}

.nav-item {
    display: block;
    padding: 12px;
    margin-bottom: 10px;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
}

.nav-item.active {
    background: #FF4444;
}

.sidebar button {
    width: 100%;
    margin-top: 20px;
    padding: 10px;
    background: transparent;
    border: 1px solid #333;
    color: #fff;
    border-radius: 6px;
    cursor: pointer;
}

.main-content {
    flex: 1;
    padding: 30px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.stat-card {
    background: #1a1a1a;
    padding: 20px;
    border-radius: 8px;
}

.stat-label {
    color: #b0b0b0;
    font-size: 0.9rem;
}

.stat-value {
    font-size: 2rem;
    color: #FF4444;
    font-weight: bold;
}

table {
    width: 100%;
    background: #1a1a1a;
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    padding: 15px;
    text-align: left;
}

th {
    background: #0d0d0d;
    color: #b0b0b0;
}

button.delete {
    background: #FF4444;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    color: #fff;
    cursor: pointer;
}