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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: white;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    text-align: center;
}

h1 { font-size: 3em; margin-bottom: 10px; }
h2 { font-size: 2.5em; margin-bottom: 20px; }
h3 { margin-bottom: 15px; }

.upload-btn, .save-btn {
    background: #ff6b6b;
    color: white;
    padding: 15px 40px;
    border: none;
    border-radius: 50px;
    font-size: 18px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.upload-btn:hover, .save-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.4);
}

.features ul {
    list-style: none;
    margin-top: 20px;
}

.features li {
    font-size: 18px;
    margin: 10px 0;
    padding: 10px;
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
}

.back-btn {
    color: white;
    text-decoration: none;
    font-size: 16px;
    margin-top: 20px;
    display: inline-block;
}

.demo-section {
    margin-top: 40px;
    text-align: left;
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: 15px;
}

.demo-section ol {
    font-size: 18px;
    margin-top: 15px;
}

.demo-section li {
    margin: 10px 0;
    padding-left: 30px;
    position: relative;
}

.demo-section li:before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 20px;
    height: 20px;
    background: #ff6b6b;
    border-radius: 50%;
}