body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f5f7fa;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.message-box {
    border: 1px solid #e0e6ef;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    background: #f8fafc;
    transition: all 0.2s;
}

.message-box:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.message-box strong {
    color: #1e40af;
}

form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input,
textarea {
    padding: 12px 15px;
    border: 1px solid #cbd5e0;
    border-radius: 8px;
    font-family: inherit;
    transition: border-color 0.2s;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

button {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

button:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    transform: translateY(-2px);
}