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

body {
    font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 12px;
    padding: 40px;
    max-width: 600px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

h1 {
    color: #333;
    margin-bottom: 30px;
    text-align: center;
}

h2 {
    color: #555;
    margin-bottom: 20px;
    font-size: 1.2em;
}

textarea {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    font-family: 'IBM Plex Mono', monospace;
    resize: vertical;
    margin-bottom: 15px;
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    font-family: 'IBM Plex Sans', sans-serif;
    transition: all 0.3s;
}

button:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

button:active {
    transform: translateY(0);
}

button.loading {
    pointer-events: none;
    opacity: 0.7;
}

#result {
    margin-top: 20px;
    padding: 20px;
    background: #f0f4ff;
    border-radius: 6px;
}

#secretUrl {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 13px;
    font-family: 'IBM Plex Mono', monospace;
}

#copyBtn {
    background: #48bb78;
}

#copyBtn:hover {
    background: #38a169;
}

#messageDisplay {
    padding: 20px;
    background: #f7fafc;
    border-left: 4px solid #667eea;
    border-radius: 4px;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'IBM Plex Mono', monospace;
}

#error {
    margin-top: 20px;
    padding: 15px;
    background: #fed7d7;
    color: #c53030;
    border-radius: 6px;
}

.hidden {
    display: none;
}