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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #101c36;
    color: #626574;
    min-height: 100vh;
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 530px;
    margin: 0 auto;
    padding: 20px 0;
}

.card {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

h1 {
    font-size: 1.5rem;
    color: #101c36;
    margin-bottom: 20px;
    text-align: center;
}

h3 {
    font-size: 1.1rem;
    color: #101c36;
    margin-bottom: 10px;
}

p {
    margin-bottom: 15px;
    font-size: 1rem;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #101c36;
}

textarea {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    transition: border-color 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: #0277bd;
}

textarea[readonly] {
    background-color: #f8f9fa;
    border-color: #d0d7de;
}

input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus {
    outline: none;
    border-color: #0277bd;
}

input[readonly] {
    background-color: #f8f9fa;
    border-color: #d0d7de;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: all 0.3s ease;
    margin: 5px 5px 5px 0;
}

.btn-primary {
    background-color: #0277bd;
    color: white;
}

.btn-primary:hover {
    background-color: #0b3279;
}

.btn-secondary {
    background-color: #848484;
    color: white;
}

.btn-secondary:hover {
    background-color: #626574;
}

.btn-copy {
    background-color: #28a745;
    color: white;
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-copy:hover {
    background-color: #218838;
}

.url-container {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 6px;
    margin: 20px 0;
    border: 1px solid #e0e0e0;
}

.url-container label {
    margin-bottom: 8px;
    font-weight: 500;
    color: #101c36;
}

.url-container input {
    margin-bottom: 10px;
}

.secret-content {
    margin: 20px 0;
}

.secret-content textarea {
    min-height: 150px;
    font-family: 'Courier New', monospace;
    background-color: #f8f9fa;
}

.char-count {
    text-align: right;
    font-size: 0.9rem;
    color: #848484;
    margin-top: 5px;
}

.success {
    color: #28a745;
    font-weight: 500;
    padding: 10px;
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: 6px;
    margin-bottom: 20px;
}

.error {
    color: #dc3545;
    font-weight: 500;
    padding: 10px;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    border-radius: 6px;
    margin-bottom: 20px;
}

.warning {
    color: #856404;
    font-weight: 500;
    padding: 10px;
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 6px;
    margin-bottom: 20px;
}

.info {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 6px;
    margin-top: 20px;
    border-left: 4px solid #0277bd;
}

.info ul {
    margin-left: 20px;
    margin-top: 10px;
}

.info li {
    margin-bottom: 5px;
}

.email-status {
    padding: 12px 15px;
    border-radius: 6px;
    margin: 15px 0;
    font-size: 0.95rem;
    border-left: 4px solid;
}

.email-status.success {
    background-color: #d4edda;
    color: #155724;
    border-left-color: #28a745;
}

.email-status.warning {
    background-color: #fff3cd;
    color: #856404;
    border-left-color: #ffc107;
}

.copy-feedback {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #28a745;
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 500;
    z-index: 1000;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    
    .container {
        max-width: 100%;
    }
    
    .card {
        padding: 20px;
    }
    
    h1 {
        font-size: 1.3rem;
    }
    
    .btn {
        width: 100%;
        margin: 5px 0;
    }
    
    .url-container {
        padding: 15px;
    }
    
    .copy-feedback {
        top: 10px;
        right: 10px;
        left: 10px;
        text-align: center;
    }
}

@media (max-width: 300px) {
    .card {
        padding: 15px;
    }
    
    h1 {
        font-size: 1.2rem;
    }
    
    textarea {
        min-height: 100px;
    }
}