/* Main Container */
.webp-converter-container {
    max-width: 600px;
    margin: 2rem auto;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Upload Area */
.webp-upload-area {
    border: 2px dashed #3498db;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    background-color: #f8fafc;
    transition: all 0.3s ease;
    cursor: pointer;
}

.webp-upload-area:hover, .webp-upload-area.dragover {
    background-color: #e3f2fd;
    border-color: #1e88e5;
}

.upload-icon {
    width: 64px;
    height: 64px;
    fill: #3498db;
    margin-bottom: 1rem;
}

.webp-upload-btn {
    display: inline-block;
    padding: 10px 20px;
    background: #3498db;
    color: white;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.3s;
    margin: 10px 0;
}

.webp-upload-btn:hover {
    background: #2980b9;
}

.file-info {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-top: 10px;
}

/* Convert Area */
.webp-convert-area {
    margin-top: 2rem;
    text-align: center;
}

.file-preview-container {
    max-width: 400px;
    margin: 0 auto 1.5rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#file-preview {
    max-width: 100%;
    display: block;
}

.webp-convert-btn {
    position: relative;
    padding: 12px 30px;
    background: #2ecc71;
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    overflow: hidden;
}

.webp-convert-btn:hover {
    background: #27ae60;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Loading Spinner */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Message Area */
.webp-message {
    padding: 15px;
    margin-top: 20px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}

.webp-message.success {
    background-color: #d4edda;
    color: #155724;
}

.webp-message.error {
    background-color: #f8d7da;
    color: #721c24;
}

/* Responsive */
@media (max-width: 600px) {
    .webp-upload-area {
        padding: 1.5rem;
    }
}