body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-family: Arial, sans-serif;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

body.index-page {
    background-image: linear-gradient(rgba(0,0,0,0.35), rgba(0,0,0,0.35)), url('images/index.png');
}

body.admin-page {
    background-image: linear-gradient(rgba(0,0,0,0.35), rgba(0,0,0,0.35)), url('images/admin.png');
}

body.users-page {
    background-image: linear-gradient(rgba(0,0,0,0.35), rgba(0,0,0,0.35)), url('images/users.png');
}

.container {
    width: 100%;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.box {
    width: 380px;
    background: rgba(255, 255, 255, 0.92);
    padding: 30px;
    border-radius: 14px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.25);
    text-align: center;
}

.table-container {
    width: 90%;
    max-width: 1100px;
    margin: 40px auto;
    background: rgba(255,255,255,0.94);
    padding: 25px;
    border-radius: 14px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}

h1, h2, h3 {
    text-align: center;
    color: #1d4ed8;
    margin-bottom: 20px;
}

input, select {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 16px;
}

button, .btn {
    display: inline-block;
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-size: 16px;
    cursor: pointer;
    box-sizing: border-box;
    text-align: center;
}

button:hover, .btn:hover {
    background: #1d4ed8;
}

a {
    color: #2563eb;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: white;
}

table th, table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: center;
}

table th {
    background: #2563eb;
    color: white;
}

table tr:nth-child(even) {
    background: #f3f4f6;
}