/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: #f9f9f9;
    color: #333;
    text-align: center;
    padding: 20px;
}

nav {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    background: #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 10;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #333;
}

.upload-btn {
    padding: 12px 20px;
    border: none;
    background: #4CAF50;
    color: white;
    cursor: pointer;
    font-weight: bold;
    border-radius: 6px;
    transition: 0.3s;
    font-size: 16px;
}

.upload-btn:hover {
    background-color: #45a049;
}

header {
    margin-top: 100px;
}

header h1 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 10px;
}

header p {
    font-size: 18px;
    opacity: 0.8;
}

.upload-box p {
    font-size: 18px;
    font-weight: 600;
    color: #666;
}

#loading {
    margin-top: 30px;
    display: none;
}

.loader {
    width: 50px;
    height: 50px;
    border: 4px solid #4CAF50;
    border-top: 4px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: auto;
}

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

#preview-section {
    display: none;
    margin-top: 30px;
}

.image-box {
    display: inline-block;
    margin: 20px;
    max-width: 320px;
    width: 100%;
    text-align: center;
}

.image-box img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0px 4px 15px rgba(0, 0, 0, 0.1);
}

#download-btn {
    padding: 12px 20px;
    background: #28a745;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
    margin-top: 20px;
    display: none;
}

#download-btn:hover {
    background: #218838;
}

footer {
    margin-top: 50px;
    font-size: 14px;
    opacity: 0.8;
}

footer a {
    text-decoration: none;
    color: #4CAF50;
}