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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

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

header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.auth-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
}

.auth-box {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    min-width: 400px;
}

.auth-box h2 {
    margin-bottom: 20px;
    text-align: center;
}

.auth-box input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 16px;
}

.auth-box button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
}

.auth-box button:hover {
    opacity: 0.9;
}

.main-content {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.upload-section {
    margin-bottom: 40px;
}

h2 {
    margin-bottom: 20px;
    color: #333;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

.dropzone {
    border: 3px dashed #667eea;
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f9ff;
}

.dropzone:hover {
    background: #f0f2ff;
    border-color: #764ba2;
}

.dropzone.dragover {
    background: #e8ebff;
    border-color: #764ba2;
}

.dropzone p {
    color: #667eea;
    font-size: 18px;
    font-weight: 600;
}

.dropzone .file-info {
    font-size: 14px;
    color: #999;
    margin-top: 8px;
}

#preview {
    margin: 20px 0;
    text-align: center;
}

#preview img {
    max-width: 300px;
    max-height: 300px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

#fileName {
    margin-top: 10px;
    color: #666;
    font-size: 14px;
}

.btn-primary {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#uploadStatus {
    margin-top: 16px;
    padding: 12px;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    display: none;
}

#uploadStatus.success {
    background: #d4edda;
    color: #155724;
    display: block;
}

#uploadStatus.error {
    background: #f8d7da;
    color: #721c24;
    display: block;
}

.current-gifs {
    margin-bottom: 40px;
}

#gifsList {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.gif-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.gif-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.gif-item .category-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.gif-item .delete-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(255, 0, 0, 0.8);
    color: white;
    border: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
}

.json-section {
    padding-top: 20px;
    border-top: 2px solid #e0e0e0;
}

.url-box {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.url-box input {
    flex: 1;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-family: monospace;
}

.url-box button {
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
}

.url-box button:hover {
    background: #5568d3;
}