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

body {
    font-family: 'Sarabun', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #5E97D3;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 3px solid #5E97D3;
}

.header h1 {
    color: #5E97D3;
    font-size: 2.5em;
    margin-bottom: 10px;
}

.header p {
    color: #666;
    font-size: 1.1em;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="datetime-local"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #5E97D3;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: #5E97D3;
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(94, 151, 211, 0.4);
    background: #4a7fb8;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-warning {
    background: #ffc107;
    color: #333;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn:hover {
    opacity: 0.9;
}

.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

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

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

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.image-preview {
    margin-top: 10px;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.preview-item {
    position: relative;
    border: 2px solid #ddd;
    border-radius: 8px;
    padding: 10px;
    background: #f9f9f9;
}

.preview-item img {
    max-width: 300px;
    max-height: 300px;
    border-radius: 5px;
}

.preview-item .remove-image {
    position: absolute;
    top: 5px;
    right: 5px;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    font-weight: bold;
}

.file-upload-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.file-upload-wrapper input[type=file] {
    position: absolute;
    left: -9999px;
}

.file-upload-label {
    display: inline-block;
    padding: 12px 30px;
    background: #5E97D3;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.file-upload-label:hover {
    background: #4a7fb8;
}

.navbar {
    background: #5E97D3;
    padding: 15px 0;
    margin: -30px -30px 30px -30px;
    border-radius: 15px 15px 0 0;
}

.navbar ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.navbar a {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 5px;
    transition: background 0.3s;
}

.navbar a:hover {
    background: rgba(255,255,255,0.2);
}

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

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

.table th {
    background: #5E97D3;
    color: white;
    font-weight: 600;
}

.table tr:hover {
    background: #f5f5f5;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.stat-card {
    background: #5E97D3;
    color: white;
    padding: 25px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.stat-card h3 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.stat-card p {
    font-size: 1.1em;
    opacity: 0.9;
}

.rating-section {
    margin-top: 20px;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 8px;
}

.submission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.submission-card {
    border: 2px solid #ddd;
    border-radius: 10px;
    padding: 15px;
    background: white;
    transition: transform 0.3s;
}

.submission-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.submission-images {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.submission-images img {
    width: 100%;
    max-width: 140px;
    height: auto;
    border-radius: 5px;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .header h1 {
        font-size: 1.8em;
    }

    .navbar ul {
        flex-direction: column;
        align-items: center;
    }

    .submission-grid {
        grid-template-columns: 1fr;
    }
}