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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

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

.header {
    background: linear-gradient(135deg, #c94b4b 0%, #4b134f 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

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

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

.content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    padding: 30px;
}

.editor-section,
.images-section {
    display: flex;
    flex-direction: column;
}

.section-title {
    font-size: 1.5em;
    color: #333;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 3px solid #667eea;
}

.card-editor {
    flex: 1;
    display: flex;
    flex-direction: column;
}

#cardText {
    flex: 1;
    min-height: 300px;
    padding: 15px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    resize: vertical;
    font-family: 'Arial', sans-serif;
}

#cardText:focus {
    outline: none;
    border-color: #667eea;
}

.char-counter {
    margin-top: 10px;
    color: #666;
    font-size: 0.9em;
}

.char-counter.warning {
    color: #e74c3c;
    font-weight: bold;
}

.upload-area {
    margin-bottom: 20px;
    padding: 20px;
    border: 2px dashed #667eea;
    border-radius: 8px;
    text-align: center;
    background: #f8f9ff;
}

.upload-btn {
    display: inline-block;
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1em;
    transition: background 0.3s;
}

.upload-btn:hover {
    background: #5568d3;
}

.upload-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

#imageInput {
    display: none;
}

.upload-info {
    margin-top: 10px;
    font-size: 0.9em;
    color: #666;
}

.status-message {
    margin-top: 10px;
    padding: 10px;
    border-radius: 6px;
    display: none;
}

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

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

.files-list {
    flex: 1;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 10px;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 10px;
    margin-bottom: 10px;
    background: #f8f9ff;
    border-radius: 6px;
    border: 1px solid #e0e0e0;
}

.file-item img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 4px;
    margin-right: 15px;
}

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: bold;
    color: #333;
    word-break: break-all;
    font-size: 0.9em;
}

.file-meta {
    font-size: 0.8em;
    color: #666;
    margin-top: 3px;
}

.insert-btn {
    padding: 8px 16px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    transition: background 0.3s;
}

.insert-btn:hover {
    background: #218838;
}

.submit-section {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    gap: 20px;
    padding-top: 20px;
    border-top: 2px solid #eee;
}

.submit-btn {
    padding: 15px 40px;
    background: linear-gradient(135deg, #c94b4b 0%, #4b134f 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: bold;
    transition: transform 0.2s, box-shadow 0.2s;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.theme-selector {
    margin-top: 20px;
}

.theme-selector label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #333;
}

.theme-selector select {
    width: 100%;
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 6px;
    font-size: 1em;
}

.no-files {
    text-align: center;
    padding: 40px;
    color: #999;
}

.loading {
    text-align: center;
    padding: 20px;
    color: #666;
}

.footer {
    margin-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9em;
}

.footer a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.5);
    transition: all 0.3s;
}

.footer a:hover {
    color: white;
    border-bottom-color: white;
}

@media (max-width: 768px) {
    .content {
        grid-template-columns: 1fr;
    }
}