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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #f8f9fa;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Заголовки */
h1, h2, h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

/* Навигация */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #2c3e50;
    padding: 10px 20px;
    color: white;
    margin-bottom: 20px;
}

.navbar h1 {
    color: white;
    margin: 0;
}

.navbar ul {
    display: flex;
    list-style: none;
}

.navbar ul li {
    margin-left: 20px;
}

.navbar a {
    color: white;
    text-decoration: none;
}

.navbar a:hover {
    color: #3498db;
}

/* Кнопки */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-success {
    background-color: #2ecc71;
    color: white;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-primary:hover, .btn-success:hover, .btn-danger:hover {
    opacity: 0.9;
}

/* Формы */
.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

input[type="text"],
input[type="password"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

/* Таблицы */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

table th, table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

table th {
    background-color: #f2f2f2;
    font-weight: 600;
}

table tr:hover {
    background-color: #f5f5f5;
}

/* Карточки */
.card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-bottom: 20px;
}

/* Сообщения */
.message {
    padding: 10px 15px;
    border-radius: 4px;
    margin-bottom: 15px;
}

.success-message {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Форма входа */
.login-form {
    max-width: 400px;
    margin: 50px auto;
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.login-form h1 {
    text-align: center;
    margin-bottom: 25px;
}

/* Превью изображений и видео */
.proof-preview {
    max-width: 300px;
    max-height: 200px;
    margin-top: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.proof-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.proof-item {
    position: relative;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
}

.proof-item img, .proof-item video {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.proof-info {
    padding: 10px;
    background-color: #f9f9f9;
}

.proof-actions {
    position: absolute;
    top: 5px;
    right: 5px;
}

/* Адаптивный дизайн */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
    }
    
    .navbar ul {
        margin-top: 10px;
    }
    
    .proof-container {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}