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

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

.container {
    max-width: 500px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
    margin-bottom: 24px;
    font-size: 24px;
}

form {
    margin-bottom: 40px;
}

label {
    display: block;
    color: #555;
    margin-bottom: 8px;
    font-size: 14px;
}

input[type="text"],
input[type="file"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 16px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
}

input[type="submit"] {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

input[type="submit"]:hover {
    background: #5568d3;
}

.otp-container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.time-info {
    background: #f5f5f5;
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 24px;
}

.time-info p {
    margin: 8px 0;
    color: #555;
}

ul {
    list-style: none;
}

li {
    padding: 16px;
    margin-bottom: 12px;
    background: #f9f9f9;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    font-size: 16px;
    color: #333;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copy-btn {
    padding: 6px 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

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